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- /****************************************************************************
- * parse.c
- *
- * This module implements a parser for the scene description files.
- *
- * from Persistence of Vision(tm) Ray Tracer
- * Copyright 1996 Persistence of Vision Team
- *---------------------------------------------------------------------------
- * NOTICE: This source code file is provided so that users may experiment
- * with enhancements to POV-Ray and to port the software to platforms other
- * than those supported by the POV-Ray Team. There are strict rules under
- * which you are permitted to use this file. The rules are in the file
- * named POVLEGAL.DOC which should be distributed with this file. If
- * POVLEGAL.DOC is not available or for more info please contact the POV-Ray
- * Team Coordinator by leaving a message in CompuServe's Graphics Developer's
- * Forum. The latest version of POV-Ray may be found there as well.
- *
- * This program is based on the popular DKB raytracer version 2.12.
- * DKBTrace was originally written by David K. Buck.
- * DKBTrace Ver 2.0-2.12 were written by David K. Buck & Aaron A. Collins.
- *
- *****************************************************************************/
-
- #include "frame.h"
- #include "vector.h"
- #include "povproto.h"
- #include "parse.h"
- #include "parstxtr.h"
- #include "atmosph.h"
- #include "bezier.h"
- #include "blob.h"
- #include "boxes.h"
- #include "colour.h"
- #include "cones.h"
- #include "csg.h"
- #include "discs.h"
- #include "express.h"
- #include "fractal.h"
- #include "gif.h"
- #include "halos.h"
- #include "hfield.h"
- #include "iff.h"
- #include "image.h"
- #include "lathe.h"
- #include "polysolv.h"
- #include "matrices.h"
- #include "mesh.h"
- #include "normal.h"
- #include "objects.h"
- #include "octree.h"
- #include "pigment.h"
- #include "planes.h"
- #include "poly.h"
- #include "polygon.h"
- #include "povray.h"
- #include "pgm.h"
- #include "ppm.h"
- #include "prism.h"
- #include "quadrics.h"
- #include "radiosit.h"
- #include "render.h"
- #include "sor.h"
- #include "spheres.h"
- #include "super.h"
- #include "targa.h"
- #include "texture.h"
- #include "tokenize.h"
- #include "torus.h"
- #include "triangle.h"
- #include "truetype.h"
-
-
- /*****************************************************************************
- * Local preprocessor defines
- ******************************************************************************/
-
- /* Volume that is considered to be infinite. [DB 9/94] */
-
- #define INFINITE_VOLUME BOUND_HUGE
-
-
- /*****************************************************************************
- * Local typedefs
- ******************************************************************************/
-
-
-
- /*****************************************************************************
- * Local variables
- ******************************************************************************/
-
- short Have_Vector;
- short Not_In_Default;
- short Ok_To_Declare;
-
- static TOKEN *Brace_Stack;
- static int Brace_Index;
- static CAMERA *Default_Camera;
-
-
-
- /*****************************************************************************
- * Static functions
- ******************************************************************************/
-
- static TRANSFORM *Parse_Transform PARAMS((void));
- static void Frame_Init PARAMS((void));
- static void Parse_Coeffs PARAMS((int order, DBL *Coeffs));
-
- static OBJECT *Parse_Bicubic_Patch PARAMS((void));
- static OBJECT *Parse_Blob PARAMS((void));
- static OBJECT *Parse_Bound_Clip PARAMS((void));
- static OBJECT *Parse_Box PARAMS((void));
- static OBJECT *Parse_Cone PARAMS((void));
- static OBJECT *Parse_CSG PARAMS((int CSG_Type));
- static OBJECT *Parse_Cylinder PARAMS((void));
- static OBJECT *Parse_Disc PARAMS((void));
- static OBJECT *Parse_Julia_Fractal PARAMS((void));
- static OBJECT *Parse_HField PARAMS((void));
- static OBJECT *Parse_Lathe PARAMS((void));
- static OBJECT *Parse_Light_Source PARAMS((void));
- static OBJECT *Parse_Object_Id PARAMS((void));
- static OBJECT *Parse_Plane PARAMS((void));
- static OBJECT *Parse_Poly PARAMS((int order));
- static OBJECT *Parse_Polygon PARAMS((void));
- static OBJECT *Parse_Prism PARAMS((void));
- static OBJECT *Parse_Quadric PARAMS((void));
- static OBJECT *Parse_Smooth_Triangle PARAMS((void));
- static OBJECT *Parse_Sor PARAMS((void));
- static OBJECT *Parse_Sphere PARAMS((void));
- static OBJECT *Parse_Superellipsoid PARAMS((void));
- static OBJECT *Parse_Torus PARAMS((void));
- static OBJECT *Parse_Triangle PARAMS((void));
- static OBJECT *Parse_Mesh PARAMS((void));
- static TEXTURE *Parse_Mesh_Texture PARAMS((void));
- static OBJECT *Parse_TrueType PARAMS((void));
- static void Parse_Blob_Element_Mods PARAMS((BLOB_ELEMENT *Element));
-
- static void Parse_Camera PARAMS((CAMERA **Camera_Ptr));
- static void Parse_Frame PARAMS((void));
-
- static char *Get_Token_String PARAMS((TOKEN Token_Id));
- static int Test_Redefine PARAMS((int Previous, int a));
- static void Destroy_Constants PARAMS((void));
- static void Found_Instead PARAMS((void));
- static void Link PARAMS((OBJECT *New_Object,OBJECT **Field,OBJECT **Old_Object_List));
- static void Link_To_Frame PARAMS((OBJECT *Object));
- static void Post_Process PARAMS((OBJECT *Object, OBJECT *Parent));
- static void Parse_Global_Settings PARAMS((void));
- static void Global_Setting_Warn PARAMS((void));
-
- static void Set_CSG_Children_Hollow PARAMS((OBJECT *Object, int hollow));
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- /* Parse the file. */
- void Parse ()
- {
- Initialize_Tokenizer();
- Brace_Stack = (TOKEN *)POV_MALLOC(MAX_BRACES*sizeof (TOKEN), "brace stack");
- Brace_Index = 0;
-
- Default_Camera = Create_Camera();
-
- Default_Texture = Create_Texture();
-
- Default_Texture->Pigment = Create_Pigment();
- Default_Texture->Tnormal = NULL;
- Default_Texture->Finish = Create_Finish();
- Default_Texture->Halo = NULL;
-
- Not_In_Default = TRUE;
- Ok_To_Declare = TRUE;
-
- Frame_Init ();
-
- Stage = STAGE_PARSING;
-
- Parse_Frame ();
-
- if (Frame.Objects == NULL)
- {
- Error ("No objects in scene.");
- }
-
- Stage = STAGE_CLEANUP_PARSE;
-
- Terminate_Tokenizer();
- Destroy_Constants ();
- Destroy_Textures(Default_Texture);
- Destroy_Camera(Default_Camera);
- POV_FREE (Brace_Stack);
-
- Default_Texture = NULL;
- Default_Camera = NULL;
- Brace_Stack = NULL;
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- /* Set up the fields in the frame to default values. */
- static
- void Frame_Init ()
- {
- Frame.Camera = Copy_Camera(Default_Camera);
- Frame.Number_Of_Light_Sources = 0;
- Frame.Light_Sources = NULL;
- Frame.Objects = NULL;
- Frame.Atmosphere_IOR = 1.0;
- Frame.Antialias_Threshold = opts.Antialias_Threshold;
-
- /* dmf -- the first is physically "more correct". The second works better */
- /* Make_Colour (Frame.Irid_Wavelengths, 0.70, 0.52, 0.48); */
- Make_Colour (Frame.Irid_Wavelengths, 0.25, 0.18, 0.14);
- Make_Colour (Frame.Background_Colour, 0.0, 0.0, 0.0);
- Make_Colour (Frame.Ambient_Light, 1.0, 1.0, 1.0);
-
- /* Init atmospheric stuff. [DB 12/94] */
-
- Frame.Atmosphere = NULL;
-
- Frame.Fog = NULL;
-
- Frame.Rainbow = NULL;
-
- Frame.Skysphere = NULL;
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- void Parse_Begin ()
- {
- char *front;
-
- Brace_Stack[++Brace_Index]=Token.Token_Id;
-
- Get_Token ();
-
- if (Token.Token_Id == LEFT_CURLY_TOKEN)
- return;
-
- front = Get_Token_String (Brace_Stack[Brace_Index]);
-
- Where_Error ();
- Error_Line ("Missing { after %s, ", front);
- Found_Instead ();
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- void Parse_End ()
- {
- char *front;
-
- Get_Token ();
-
- if (Token.Token_Id == RIGHT_CURLY_TOKEN)
- {
- Brace_Index--;
- return;
- }
-
- front = Get_Token_String (Brace_Stack[Brace_Index]);
-
- Where_Error ();
- Error_Line("No matching } in %s,", front);
- Found_Instead ();
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static OBJECT *Parse_Object_Id ()
- {
- OBJECT *Object;
-
- EXPECT
- CASE (OBJECT_ID_TOKEN)
- Warn_State(OBJECT_ID_TOKEN, OBJECT_TOKEN);
- Object = Copy_Object((OBJECT *) Token.Constant_Data);
- Parse_Object_Mods (Object);
- EXIT
- END_CASE
-
- OTHERWISE
- Object = NULL;
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- return (Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- void Parse_Comma ()
- {
- Get_Token();
- if (Token.Token_Id != COMMA_TOKEN)
- {
- UNGET;
- }
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static void Parse_Coeffs(order, Coeffs)
- int order;
- DBL *Coeffs;
- {
- int i;
-
- EXPECT
- CASE (LEFT_ANGLE_TOKEN)
- Coeffs[0] = Parse_Float();
- for (i = 1; i < term_counts(order); i++)
- {
- Parse_Comma();
- Coeffs[i] = Parse_Float();
- }
- GET (RIGHT_ANGLE_TOKEN);
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (LEFT_ANGLE_TOKEN);
- END_CASE
- END_EXPECT
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static
- OBJECT *Parse_Bound_Clip ()
- {
- VECTOR Local_Vector;
- MATRIX Local_Matrix;
- TRANSFORM Local_Trans;
- OBJECT *First, *Current, *Prev;
-
- First = Prev = NULL;
-
- while ((Current = Parse_Object ()) != NULL)
- {
- if (Current->Type & (TEXTURED_OBJECT+PATCH_OBJECT))
- Error ("Illegal texture or patch in clip or bound.");
- if (First == NULL)
- First = Current;
- if (Prev != NULL)
- Prev->Sibling = Current;
- Prev = Current;
- }
-
- EXPECT
- CASE (TRANSLATE_TOKEN)
- Parse_Vector (Local_Vector);
- Compute_Translation_Transform(&Local_Trans, Local_Vector);
- for (Current = First; Current != NULL; Current = Current->Sibling)
- {
- Translate_Object (Current, Local_Vector, &Local_Trans);
- }
- END_CASE
-
- CASE (ROTATE_TOKEN)
- Parse_Vector (Local_Vector);
- Compute_Rotation_Transform(&Local_Trans, Local_Vector);
- for (Current = First; Current != NULL; Current = Current->Sibling)
- {
- Rotate_Object (Current, Local_Vector, &Local_Trans);
- }
- END_CASE
-
- CASE (SCALE_TOKEN)
- Parse_Scale_Vector (Local_Vector);
- Compute_Scaling_Transform(&Local_Trans, Local_Vector);
- for (Current = First; Current != NULL; Current = Current->Sibling)
- {
- Scale_Object (Current, Local_Vector, &Local_Trans);
- }
- END_CASE
-
- CASE (TRANSFORM_TOKEN)
- GET(TRANSFORM_ID_TOKEN)
- for (Current = First; Current != NULL; Current = Current->Sibling)
- {
- Transform_Object (Current, (TRANSFORM *)Token.Constant_Data);
- }
- END_CASE
-
- CASE (MATRIX_TOKEN)
- Parse_Matrix (Local_Matrix);
- Compute_Matrix_Transform(&Local_Trans, Local_Matrix);
- for (Current = First; Current != NULL; Current = Current->Sibling)
- {
- Transform_Object (Current, &Local_Trans);
- }
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- if (First==NULL)
- {
- Parse_Error_Str("object");
- }
-
- return (First);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- void Parse_Object_Mods (Object)
- OBJECT *Object;
- {
- DBL Temp_Water_Level;
- DBL V1, V2;
- VECTOR Min, Max;
- VECTOR Local_Vector;
- MATRIX Local_Matrix;
- TRANSFORM Local_Trans;
- BBOX BBox;
- OBJECT *Sib;
- TEXTURE *Local_Texture;
- OBJECT *Temp1_Object;
- OBJECT *Temp2_Object;
- COLOUR Local_Colour;
-
- EXPECT
- CASE_COLOUR
- Parse_Colour (Local_Colour);
- if (opts.Language_Version < 1.5)
- if (Object->Texture != NULL)
- if (Object->Texture->Type == PLAIN_PATTERN)
- if (opts.Quality_Flags & Q_QUICKC)
- {
- Assign_Colour(Object->Texture->Pigment->Colour,Local_Colour);
- break; /* acts like END_CASE */
- }
- Warn(0.0, "Quick color belongs in texture. Color ignored.");
- END_CASE
-
- CASE (TRANSLATE_TOKEN)
- Parse_Vector (Local_Vector);
- Compute_Translation_Transform(&Local_Trans, Local_Vector);
- Translate_Object (Object, Local_Vector, &Local_Trans);
- END_CASE
-
- CASE (ROTATE_TOKEN)
- Parse_Vector (Local_Vector);
- Compute_Rotation_Transform(&Local_Trans, Local_Vector);
- Rotate_Object (Object, Local_Vector, &Local_Trans);
- END_CASE
-
- CASE (SCALE_TOKEN)
- Parse_Scale_Vector (Local_Vector);
- Compute_Scaling_Transform(&Local_Trans, Local_Vector);
- Scale_Object (Object, Local_Vector, &Local_Trans);
- END_CASE
-
- CASE (TRANSFORM_TOKEN)
- GET(TRANSFORM_ID_TOKEN)
- Transform_Object (Object, (TRANSFORM *)Token.Constant_Data);
- END_CASE
-
- CASE (MATRIX_TOKEN)
- Parse_Matrix (Local_Matrix);
- Compute_Matrix_Transform(&Local_Trans, Local_Matrix);
- Transform_Object (Object, &Local_Trans);
- END_CASE
-
- CASE (BOUNDED_BY_TOKEN)
- Parse_Begin ();
- if (Object->Bound != NULL)
- if (Object->Clip == Object->Bound)
- Error ("Cannot add bounds after linking bounds and clips.");
-
- EXPECT
- CASE (CLIPPED_BY_TOKEN)
- if (Object->Bound != NULL)
- Error ("Cannot link clips with previous bounds.");
- Object->Bound = Object->Clip;
- EXIT
- END_CASE
-
- OTHERWISE
- UNGET
- Temp1_Object = Temp2_Object = Parse_Bound_Clip ();
- while (Temp2_Object->Sibling != NULL)
- Temp2_Object = Temp2_Object->Sibling;
- Temp2_Object->Sibling = Object->Bound;
- Object->Bound = Temp1_Object;
- EXIT
- END_CASE
- END_EXPECT
-
- Parse_End ();
- END_CASE
-
- CASE (CLIPPED_BY_TOKEN)
- Parse_Begin ();
- if (Object->Clip != NULL)
- if (Object->Clip == Object->Bound)
- Error ("Cannot add clips after linking bounds and clips.");
-
- EXPECT
- CASE (BOUNDED_BY_TOKEN)
- if (Object->Clip != NULL)
- Error ("Cannot link bounds with previous clips.");
- Object->Clip = Object->Bound;
- EXIT
- END_CASE
-
- OTHERWISE
- UNGET
- Temp1_Object = Temp2_Object = Parse_Bound_Clip ();
- while (Temp2_Object->Sibling != NULL)
- Temp2_Object = Temp2_Object->Sibling;
- Temp2_Object->Sibling = Object->Clip;
- Object->Clip = Temp1_Object;
-
- /* Compute quadric bounding box before transformations. [DB 8/94] */
-
- if (Object->Methods == &Quadric_Methods)
- {
- Make_Vector(Min, -BOUND_HUGE, -BOUND_HUGE, -BOUND_HUGE);
- Make_Vector(Max, BOUND_HUGE, BOUND_HUGE, BOUND_HUGE);
-
- Compute_Quadric_BBox((QUADRIC *)Object, Min, Max);
- }
- EXIT
- END_CASE
- END_EXPECT
-
- Parse_End ();
- END_CASE
-
- CASE (TEXTURE_TOKEN)
- Object->Type |= TEXTURED_OBJECT;
- Parse_Begin ();
- Local_Texture = Parse_Texture ();
- Parse_End ();
- Link_Textures(&(Object->Texture), Local_Texture);
- END_CASE
-
- CASE4 (PIGMENT_TOKEN, TNORMAL_TOKEN, FINISH_TOKEN, HALO_TOKEN)
- Object->Type |= TEXTURED_OBJECT;
- if (Object->Texture == NULL)
- Object->Texture = Copy_Textures(Default_Texture);
- else
- if (Object->Texture->Type != PLAIN_PATTERN)
- Link_Textures(&(Object->Texture), Copy_Textures(Default_Texture));
- UNGET
- EXPECT
- CASE (PIGMENT_TOKEN)
- Parse_Begin ();
- Parse_Pigment ( &(Object->Texture->Pigment) );
- Parse_End ();
- END_CASE
-
- CASE (TNORMAL_TOKEN)
- Parse_Begin ();
- Parse_Tnormal ( &(Object->Texture->Tnormal) );
- Parse_End ();
- END_CASE
-
- CASE (FINISH_TOKEN)
- Parse_Finish ( &(Object->Texture->Finish) );
- END_CASE
-
- CASE (HALO_TOKEN)
- Parse_Halo ( &(Object->Texture->Halo) );
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
- END_CASE
-
- CASE (INVERSE_TOKEN)
- if (Object->Type & PATCH_OBJECT)
- Warn (0.0, "Cannot invert a patch object.");
- Invert_Object (Object);
- END_CASE
-
- CASE (STURM_TOKEN)
- if (!(Object->Type & STURM_OK_OBJECT))
- Not_With ("sturm","this object");
- Bool_Flag (Object, STURM_FLAG, (Allow_Float(1.0) > 0.0));
- END_CASE
-
- CASE (WATER_LEVEL_TOKEN)
- if (!(Object->Type & WATER_LEVEL_OK_OBJECT))
- Not_With ("water_level","this object");
- Temp_Water_Level = Parse_Float();
- if (opts.Language_Version < 2.0)
- Temp_Water_Level /=256.0;
- ((HFIELD *) Object)->bounding_box->bounds[0][Y] = 65536.0 * Temp_Water_Level;
- END_CASE
-
- CASE (SMOOTH_TOKEN)
- if (!(Object->Type & SMOOTH_OK_OBJECT))
- Not_With ("smooth","this object");
- Set_Flag(Object, SMOOTHED_FLAG);
- Object->Type |= DOUBLE_ILLUMINATE;
- END_CASE
-
- CASE (NO_SHADOW_TOKEN)
- Set_Flag(Object, NO_SHADOW_FLAG);
- END_CASE
-
- CASE (LIGHT_SOURCE_TOKEN)
- Error("Light source must be defined using new syntax.");
- END_CASE
-
- CASE(HIERARCHY_TOKEN)
- if (!(Object->Type & HIERARCHY_OK_OBJECT))
- Not_With ("hierarchy", "this object");
- Bool_Flag (Object, HIERARCHY_FLAG, (Allow_Float(1.0) > 0.0));
- END_CASE
-
- CASE(HOLLOW_TOKEN)
- Bool_Flag (Object, HOLLOW_FLAG, (Allow_Float(1.0) > 0.0));
- Set_Flag (Object, HOLLOW_SET_FLAG);
- if ((Object->Methods == &CSG_Intersection_Methods) ||
- (Object->Methods == &CSG_Merge_Methods) ||
- (Object->Methods == &CSG_Union_Methods))
- {
- Set_CSG_Children_Hollow(Object, Test_Flag(Object, HOLLOW_FLAG));
- }
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- /*
- * Assign bounding objects' bounding box to object
- * if object's bounding box is larger. [DB 9/94]
- */
-
- if (Object->Bound != NULL)
- {
- /* Get bounding objects bounding box. */
-
- Make_Vector(Min, -BOUND_HUGE, -BOUND_HUGE, -BOUND_HUGE);
- Make_Vector(Max, BOUND_HUGE, BOUND_HUGE, BOUND_HUGE);
-
- for (Sib = Object->Bound; Sib != NULL; Sib = Sib->Sibling)
- {
- if (!Test_Flag(Sib, INVERTED_FLAG))
- {
- Min[X] = max(Min[X], Sib->BBox.Lower_Left[X]);
- Min[Y] = max(Min[Y], Sib->BBox.Lower_Left[Y]);
- Min[Z] = max(Min[Z], Sib->BBox.Lower_Left[Z]);
- Max[X] = min(Max[X], Sib->BBox.Lower_Left[X] + Sib->BBox.Lengths[X]);
- Max[Y] = min(Max[Y], Sib->BBox.Lower_Left[Y] + Sib->BBox.Lengths[Y]);
- Max[Z] = min(Max[Z], Sib->BBox.Lower_Left[Z] + Sib->BBox.Lengths[Z]);
- }
- }
-
- Make_BBox_from_min_max(BBox, Min, Max);
-
- /* Get bounding boxes' volumes. */
-
- BOUNDS_VOLUME(V1, BBox);
- BOUNDS_VOLUME(V2, Object->BBox);
-
- if (V1 < V2)
- {
- Object->BBox = BBox;
- }
- }
-
- /*
- * Assign clipping objects' bounding box to object
- * if object's bounding box is larger. [DB 9/94]
- */
-
- if (Object->Clip != NULL)
- {
- /* Get clipping objects bounding box. */
-
- Make_Vector(Min, -BOUND_HUGE, -BOUND_HUGE, -BOUND_HUGE);
- Make_Vector(Max, BOUND_HUGE, BOUND_HUGE, BOUND_HUGE);
-
- for (Sib = Object->Clip; Sib != NULL; Sib = Sib->Sibling)
- {
- if (!Test_Flag(Sib, INVERTED_FLAG))
- {
- Min[X] = max(Min[X], Sib->BBox.Lower_Left[X]);
- Min[Y] = max(Min[Y], Sib->BBox.Lower_Left[Y]);
- Min[Z] = max(Min[Z], Sib->BBox.Lower_Left[Z]);
- Max[X] = min(Max[X], Sib->BBox.Lower_Left[X] + Sib->BBox.Lengths[X]);
- Max[Y] = min(Max[Y], Sib->BBox.Lower_Left[Y] + Sib->BBox.Lengths[Y]);
- Max[Z] = min(Max[Z], Sib->BBox.Lower_Left[Z] + Sib->BBox.Lengths[Z]);
- }
- }
-
- Make_BBox_from_min_max(BBox, Min, Max);
-
- /* Get bounding boxes' volumes. */
-
- BOUNDS_VOLUME(V1, BBox);
- BOUNDS_VOLUME(V2, Object->BBox);
-
- if (V1 < V2)
- {
- Object->BBox = BBox;
- }
- }
-
- Parse_End ();
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * Set_CSG_Children_Hollow
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static void Set_CSG_Children_Hollow(Object, hollow)
- OBJECT *Object;
- int hollow;
- {
- OBJECT *Sib;
-
- for (Sib = ((CSG *)Object)->Children; Sib != NULL; Sib = Sib->Sibling)
- {
- if (!Test_Flag(Sib, HOLLOW_SET_FLAG))
- {
- if ((Sib->Methods == &CSG_Intersection_Methods) ||
- (Sib->Methods == &CSG_Merge_Methods) ||
- (Sib->Methods == &CSG_Union_Methods))
- {
- Set_CSG_Children_Hollow(Sib, hollow);
- }
- else
- {
- Sib->Flags = (Sib->Flags & (~HOLLOW_FLAG)) | hollow;
- }
- }
- }
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static OBJECT *Parse_Sphere()
- {
- SPHERE *Object;
-
- Parse_Begin();
-
- if ((Object = (SPHERE *)Parse_Object_Id()) != NULL)
- {
- return ((OBJECT *) Object);
- }
-
- Object = Create_Sphere();
-
- Parse_Vector(Object->Center);
-
- Parse_Comma();
-
- Object->Radius = Parse_Float();
-
- Compute_Sphere_BBox(Object);
-
- Parse_Object_Mods((OBJECT *)Object);
-
- return((OBJECT *)Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static
- OBJECT *Parse_Plane ()
- {
- DBL len;
- PLANE *Object;
-
- Parse_Begin ();
-
- if ( (Object = (PLANE *)Parse_Object_Id()) != NULL)
- return ((OBJECT *) Object);
-
- Object = Create_Plane();
-
- Parse_Vector(Object->Normal_Vector); Parse_Comma();
- VLength(len, Object->Normal_Vector);
- if (len < EPSILON)
- {
- Error("Degenerate plane normal.");
- }
- VInverseScaleEq(Object->Normal_Vector, len);
- Object->Distance = -Parse_Float();
-
- Compute_Plane_BBox(Object);
-
- Parse_Object_Mods ((OBJECT *)Object);
-
- return ((OBJECT *) Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static
- OBJECT *Parse_HField ()
- {
- HFIELD *Object;
- VECTOR Local_Vector;
- IMAGE *Image;
-
- Parse_Begin ();
-
- if ( (Object = (HFIELD *)Parse_Object_Id()) != NULL)
- return ((OBJECT *) Object);
-
- Object = Create_HField();
-
- Image = Parse_Image (HF_FILE);
- Image->Use_Colour_Flag = FALSE;
-
- Make_Vector(Object->bounding_box->bounds[0], 0.0, 0.0, 0.0);
-
- if (Image->File_Type == POT_FILE)
- {
- Object->bounding_box->bounds[1][X] = Image->width/2.0 - 1.0;
- }
- else
- {
- Object->bounding_box->bounds[1][X] = Image->width - 1.0;
- }
-
- Object->bounding_box->bounds[1][Y] = 65536.0;
- Object->bounding_box->bounds[1][Z] = Image->height - 1.0;
-
- Make_Vector(Local_Vector,
- 1.0 / (Object->bounding_box->bounds[1][X]),
- 1.0 / (Object->bounding_box->bounds[1][Y]),
- 1.0 / (Object->bounding_box->bounds[1][Z]));
-
- Compute_Scaling_Transform(Object->Trans, Local_Vector);
-
- Parse_Object_Mods ((OBJECT *)Object);
-
- Compute_HField(Object, Image);
-
- Compute_HField_BBox(Object);
-
- Destroy_Image (Image);
-
- return ((OBJECT *) Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static OBJECT *Parse_Triangle()
- {
- TRIANGLE *Object;
-
- Parse_Begin();
-
- if ((Object = (TRIANGLE *)Parse_Object_Id()) != NULL)
- {
- return((OBJECT *) Object);
- }
-
- Object = Create_Triangle();
-
- Parse_Vector(Object->P1); Parse_Comma();
- Parse_Vector(Object->P2); Parse_Comma();
- Parse_Vector(Object->P3);
-
- /* Note that Compute_Triangle also computes the bounding box. */
-
- if (!Compute_Triangle(Object, FALSE))
- {
- Warn(0.0, "Degenerate triangle. Please remove.");
- }
-
- Parse_Object_Mods((OBJECT *)Object);
-
- return((OBJECT *)Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static
- OBJECT *Parse_Smooth_Triangle ()
- {
- SMOOTH_TRIANGLE *Object;
- short degen;
- DBL vlen;
-
- degen=FALSE;
-
- Parse_Begin ();
-
- if ( (Object = (SMOOTH_TRIANGLE *)Parse_Object_Id()) != NULL)
- return ((OBJECT *) Object);
-
- Object = Create_Smooth_Triangle();
-
- Parse_Vector (Object->P1); Parse_Comma();
- Parse_Vector (Object->N1); Parse_Comma();
-
- VLength(vlen,Object->N1);
-
- if (vlen == 0.0)
- degen=TRUE;
- else
- VNormalize (Object->N1, Object->N1);
-
- Parse_Vector (Object->P2); Parse_Comma();
- Parse_Vector (Object->N2); Parse_Comma();
-
- VLength(vlen,Object->N2);
-
- if (vlen == 0.0)
- degen=TRUE;
- else
- VNormalize (Object->N2, Object->N2);
-
- Parse_Vector (Object->P3); Parse_Comma();
- Parse_Vector (Object->N3);
-
- VLength(vlen,Object->N3);
-
- if (vlen == 0.0)
- degen=TRUE;
- else
- VNormalize (Object->N3, Object->N3);
-
- if (!degen)
- {
- degen=!Compute_Triangle ((TRIANGLE *) Object,TRUE);
- }
-
- if (degen)
- {
- Warn(0.0, "Degenerate triangle. Please remove.");
- }
-
- Compute_Triangle_BBox((TRIANGLE *)Object);
-
- Parse_Object_Mods ((OBJECT *)Object);
-
- return ((OBJECT *) Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static
- OBJECT *Parse_Quadric ()
- {
- VECTOR Min, Max;
- QUADRIC *Object;
-
- Parse_Begin ();
-
- if ( (Object = (QUADRIC *)Parse_Object_Id()) != NULL)
- return ((OBJECT *) Object);
-
- Object = Create_Quadric();
-
- Parse_Vector(Object->Square_Terms); Parse_Comma();
- Parse_Vector(Object->Mixed_Terms); Parse_Comma();
- Parse_Vector(Object->Terms); Parse_Comma();
- Object->Constant = Parse_Float();
-
- Make_Vector(Min, -BOUND_HUGE, -BOUND_HUGE, -BOUND_HUGE);
- Make_Vector(Max, BOUND_HUGE, BOUND_HUGE, BOUND_HUGE);
-
- Compute_Quadric_BBox(Object, Min, Max);
-
- Parse_Object_Mods ((OBJECT *)Object);
-
- return ((OBJECT *) Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static
- OBJECT *Parse_Box ()
- {
- BOX *Object;
- DBL temp;
-
- Parse_Begin ();
-
- if ( (Object = (BOX *)Parse_Object_Id()) != NULL)
- return ((OBJECT *) Object);
-
- Object = Create_Box();
-
- Parse_Vector(Object->bounds[0]); Parse_Comma();
- Parse_Vector(Object->bounds[1]);
-
- if (Object->bounds[0][X] > Object->bounds[1][X]) {
- temp = Object->bounds[0][X];
- Object->bounds[0][X] = Object->bounds[1][X];
- Object->bounds[1][X] = temp;
- }
- if (Object->bounds[0][Y] > Object->bounds[1][Y]) {
- temp = Object->bounds[0][Y];
- Object->bounds[0][Y] = Object->bounds[1][Y];
- Object->bounds[1][Y] = temp;
- }
- if (Object->bounds[0][Z] > Object->bounds[1][Z]) {
- temp = Object->bounds[0][Z];
- Object->bounds[0][Z] = Object->bounds[1][Z];
- Object->bounds[1][Z] = temp;
- }
-
- Compute_Box_BBox(Object);
-
- Parse_Object_Mods ((OBJECT *)Object);
-
- return ((OBJECT *) Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static
- OBJECT *Parse_Disc ()
- {
- DISC *Object;
- DBL tmpf;
-
- Parse_Begin ();
-
- if ( (Object = (DISC *)Parse_Object_Id()) != NULL)
- return ((OBJECT *) Object);
-
- Object = Create_Disc();
-
- Parse_Vector(Object->center); Parse_Comma ();
- Parse_Vector(Object->normal); Parse_Comma ();
- VNormalize(Object->normal, Object->normal);
-
- tmpf = Parse_Float(); Parse_Comma ();
- Object->oradius2 = tmpf * tmpf;
-
- EXPECT
- CASE_FLOAT
- tmpf = Parse_Float();
- Object->iradius2 = tmpf * tmpf;
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- /* Calculate info needed for ray-disc intersections */
- VDot(tmpf, Object->center, Object->normal);
- Object->d = -tmpf;
-
- Compute_Disc(Object);
-
- Parse_Object_Mods ((OBJECT *)Object);
-
- return ((OBJECT *) Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static
- OBJECT *Parse_Cylinder ()
- {
- CONE *Object;
-
- Parse_Begin ();
-
- if ( (Object = (CONE *)Parse_Object_Id()) != NULL)
- return ((OBJECT *) Object);
-
- Object = Create_Cylinder();
-
- Parse_Vector(Object->apex); Parse_Comma ();
- Parse_Vector(Object->base); Parse_Comma ();
- Object->apex_radius = Parse_Float();
- Object->base_radius = Object->apex_radius;
-
- EXPECT
- CASE(OPEN_TOKEN)
- Clear_Flag(Object, CLOSED_FLAG);
- EXIT
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- Compute_Cylinder_Data((OBJECT *)Object);
-
- Compute_Cone_BBox(Object);
-
- Parse_Object_Mods ((OBJECT *)Object);
-
- return ((OBJECT *) Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static
- OBJECT *Parse_Cone ()
- {
- CONE *Object;
-
- Parse_Begin ();
-
- if ( (Object = (CONE *)Parse_Object_Id()) != NULL)
- return ((OBJECT *) Object);
-
- Object = Create_Cone();
-
- Parse_Vector(Object->apex); Parse_Comma ();
- Object->apex_radius = Parse_Float(); Parse_Comma ();
-
- Parse_Vector(Object->base); Parse_Comma ();
- Object->base_radius = Parse_Float();
-
- EXPECT
- CASE(OPEN_TOKEN)
- Clear_Flag(Object, CLOSED_FLAG);
- EXIT
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- /* Compute run-time values for the cone */
- Compute_Cone_Data((OBJECT *)Object);
-
- Compute_Cone_BBox(Object);
-
- Parse_Object_Mods ((OBJECT *)Object);
-
- return ((OBJECT *) Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * Parse_Blob_Element_Mods
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * Dieter Bayer
- *
- * DESCRIPTION
- *
- * -
- *
- * CHANGES
- *
- * Sep 1994 : Creation.
- *
- ******************************************************************************/
-
- static void Parse_Blob_Element_Mods(Element)
- BLOB_ELEMENT *Element;
- {
- VECTOR Local_Vector;
- MATRIX Local_Matrix;
- TRANSFORM Local_Trans;
- TEXTURE *Local_Texture;
-
- EXPECT
- CASE (TRANSLATE_TOKEN)
- Parse_Vector (Local_Vector);
- Translate_Blob_Element (Element, Local_Vector);
- END_CASE
-
- CASE (ROTATE_TOKEN)
- Parse_Vector (Local_Vector);
- Rotate_Blob_Element (Element, Local_Vector);
- END_CASE
-
- CASE (SCALE_TOKEN)
- Parse_Scale_Vector (Local_Vector);
- Scale_Blob_Element (Element, Local_Vector);
- END_CASE
-
- CASE (TRANSFORM_TOKEN)
- GET(TRANSFORM_ID_TOKEN)
- Transform_Blob_Element (Element, (TRANSFORM *)Token.Constant_Data);
- END_CASE
-
- CASE (MATRIX_TOKEN)
- Parse_Matrix (Local_Matrix);
- Compute_Matrix_Transform(&Local_Trans, Local_Matrix);
- Transform_Blob_Element (Element, &Local_Trans);
- END_CASE
-
- CASE (TEXTURE_TOKEN)
- Parse_Begin ();
- Local_Texture = Parse_Texture();
- Parse_End ();
- Link_Textures(&Element->Texture, Local_Texture);
- END_CASE
-
- CASE4 (PIGMENT_TOKEN, TNORMAL_TOKEN, FINISH_TOKEN, HALO_TOKEN)
- if (Element->Texture == NULL)
- {
- Element->Texture = Copy_Textures(Default_Texture);
- }
- else
- {
- if (Element->Texture->Type != PLAIN_PATTERN)
- {
- Link_Textures(&Element->Texture, Copy_Textures(Default_Texture));
- }
- }
- UNGET
- EXPECT
- CASE (PIGMENT_TOKEN)
- Parse_Begin ();
- Parse_Pigment(&Element->Texture->Pigment);
- Parse_End ();
- END_CASE
-
- CASE (TNORMAL_TOKEN)
- Parse_Begin ();
- Parse_Tnormal(&Element->Texture->Tnormal);
- Parse_End ();
- END_CASE
-
- CASE (FINISH_TOKEN)
- Parse_Finish(&Element->Texture->Finish);
- END_CASE
-
- CASE (HALO_TOKEN)
- Parse_Halo(&(Element->Texture->Halo));
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- Parse_End();
-
- /* Postprocess to make sure that HAS_FILTER will be set correctly. */
-
- Post_Textures(Element->Texture);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * Parse_Blob
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * Dieter Bayer
- *
- * DESCRIPTION
- *
- * -
- *
- * CHANGES
- *
- * Jul 1994 : Creation.
- *
- ******************************************************************************/
-
- static OBJECT *Parse_Blob()
- {
- int npoints;
- DBL threshold;
- VECTOR Axis, Base, Apex;
- BLOB *Object;
- blobstackptr blob_components, blob_component;
-
- Parse_Begin();
-
- if ((Object = (BLOB *)Parse_Object_Id()) != NULL)
- {
- return ((OBJECT *) Object);
- }
-
- Object = Create_Blob();
-
- blob_components = NULL;
-
- npoints = 0;
-
- threshold = 1.0;
-
- EXPECT
- CASE (THRESHOLD_TOKEN)
- threshold = Parse_Float();
- END_CASE
-
- /*************************************************************************
- * Read sperical component (old syntax).
- *************************************************************************/
-
- CASE (COMPONENT_TOKEN)
- blob_component = Create_Blob_List_Element();
-
- blob_component->elem.Type = BLOB_SPHERE;
-
- blob_component->elem.c[2] = Parse_Float();
-
- Parse_Comma();
-
- blob_component->elem.rad2 = Parse_Float();
-
- Parse_Comma();
-
- blob_component->elem.rad2 = Sqr(blob_component->elem.rad2);
-
- Parse_Vector(blob_component->elem.O);
-
- /* Next component. */
-
- blob_component->next = blob_components;
-
- blob_components = blob_component;
-
- npoints++;
- END_CASE
-
- /*************************************************************************
- * Read sperical component (new syntax).
- *************************************************************************/
-
- CASE (SPHERE_TOKEN)
- blob_component = Create_Blob_List_Element();
-
- blob_component->elem.Type = BLOB_SPHERE;
-
- Parse_Begin();
-
- Parse_Vector(blob_component->elem.O);
-
- Parse_Comma();
-
- blob_component->elem.rad2 = Parse_Float();
-
- blob_component->elem.rad2 = Sqr(blob_component->elem.rad2);
-
- Parse_Comma();
-
- ALLOW(STRENGTH_TOKEN)
-
- blob_component->elem.c[2] = Parse_Float();
-
- Parse_Blob_Element_Mods(&blob_component->elem);
-
- /* Next component. */
-
- blob_component->next = blob_components;
-
- blob_components = blob_component;
-
- npoints++;
- END_CASE
-
- /*************************************************************************
- * Read cylindrical component.
- *************************************************************************/
-
- CASE (CYLINDER_TOKEN)
- blob_component = Create_Blob_List_Element();
-
- blob_component->elem.Type = BLOB_CYLINDER;
-
- blob_component->elem.Trans = Create_Transform();
-
- Parse_Begin();
-
- Parse_Vector(Base);
-
- Parse_Comma();
-
- Parse_Vector(Apex);
-
- Parse_Comma();
-
- blob_component->elem.rad2 = Parse_Float();
-
- blob_component->elem.rad2 = Sqr(blob_component->elem.rad2);
-
- Parse_Comma();
-
- ALLOW(STRENGTH_TOKEN)
-
- blob_component->elem.c[2] = Parse_Float();
-
- /* Calculate cylinder's coordinate system. */
-
- VSub(Axis, Apex, Base);
-
- VLength(blob_component->elem.len, Axis);
-
- if (blob_component->elem.len < EPSILON)
- {
- Error("Degenerate cylindrical component in blob.\n");
- }
-
- VInverseScaleEq(Axis, blob_component->elem.len);
-
- Compute_Coordinate_Transform(blob_component->elem.Trans, Base, Axis, 1.0, 1.0);
-
- Parse_Blob_Element_Mods(&blob_component->elem);
-
- /* Next component. */
-
- blob_component->next = blob_components;
-
- blob_components = blob_component;
-
- npoints++;
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- Create_Blob_Element_Texture_List(Object, blob_components, npoints);
-
- Parse_Object_Mods((OBJECT *)Object);
-
- /* The blob's texture has to be processed before Make_Blob() is called. */
-
- Post_Textures(Object->Texture);
-
- /* Finally, process the information */
-
- Make_Blob(Object, threshold, blob_components, npoints);
-
- return((OBJECT *)Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * Parse_Julia_Fractal
- *
- * INPUT None
- *
- * OUTPUT Fractal Objecstructure filledt
- *
- * RETURNS
- *
- * OBJECT * -
- *
- * AUTHOR
- *
- * Pascal Massimino
- *
- * DESCRIPTION
- *
- * -
- *
- * CHANGES
- *
- * Dec 1994 : Adopted to version 3.0. [DB]
- * Sept 1995 : Total rewrite for new syntax [TW]
- *
- ******************************************************************************/
-
- static OBJECT *Parse_Julia_Fractal ()
- {
- FRACTAL *Object;
- DBL P;
-
- Parse_Begin();
-
- if ( (Object = (FRACTAL *)Parse_Object_Id()) != NULL)
- return((OBJECT *)Object);
-
- Object = Create_Fractal();
-
- Parse_Vector4D(Object->Julia_Parm);
-
- EXPECT
-
- CASE(MAX_ITERATION_TOKEN)
- Object->n = (int)floor(Parse_Float());
-
- if (Object->n <= 0)
- {
- Object->n = 1;
- }
- END_CASE
-
- CASE(SLICE_TOKEN)
- Parse_Vector4D(Object->Slice);
- Parse_Comma();
- Object->SliceDist = Parse_Float();
-
- /* normalize slice vector */
- V4D_Dot(P,Object->Slice, Object->Slice);
- if (fabs(P) < EPSILON)
- {
- Error("Slice vector is zero.\n");
- }
- if (fabs(Object->Slice[T]) < EPSILON)
- {
- Error("Slice t component is zero.\n");
- }
- P = sqrt(P);
- V4D_InverseScaleEq(Object->Slice, P);
-
- END_CASE
-
- CASE(PRECISION_TOKEN)
- P = Parse_Float();
- if ( P < 1.0 )
- {
- P = 1.0;
- }
- Object->Precision = 1.0 / P;
- END_CASE
-
- CASE(FLOAT_FUNCT_TOKEN)
- switch(Token.Function_Id)
- {
- case EXP_TOKEN:
- Object->Sub_Type = EXP_STYPE;
- break;
- case LOG_TOKEN:
- Object->Sub_Type = LOG_STYPE;
- break;
- case SIN_TOKEN:
- Object->Sub_Type = SIN_STYPE;
- break;
- case ASIN_TOKEN:
- Object->Sub_Type = ASIN_STYPE;
- break;
- case COS_TOKEN:
- Object->Sub_Type = COS_STYPE;
- break;
- case ACOS_TOKEN:
- Object->Sub_Type = ACOS_STYPE;
- break;
- default: Parse_Error_Str ("fractal keyword");
- }
- END_CASE
-
- /* if any of the next become supported by the expression parser,
- * then their handling would need to move above to the FUNC_TOKEN
- * case above.
- */
- CASE(ATAN_TOKEN)
- Object->Sub_Type = ATAN_STYPE;
- END_CASE
-
- CASE(COSH_TOKEN)
- Object->Sub_Type = COSH_STYPE;
- END_CASE
-
- CASE(SINH_TOKEN)
- Object->Sub_Type = SINH_STYPE;
- END_CASE
-
- CASE(TANH_TOKEN)
- Object->Sub_Type = TANH_STYPE;
- END_CASE
-
- CASE(ATANH_TOKEN)
- Object->Sub_Type = ATANH_STYPE;
- END_CASE
-
- CASE(ACOSH_TOKEN)
- Object->Sub_Type = ACOSH_STYPE;
- END_CASE
-
- CASE(ASINH_TOKEN)
- Object->Sub_Type = ASINH_STYPE;
- END_CASE
-
- CASE(SQR_TOKEN)
- Object->Sub_Type = SQR_STYPE;
- END_CASE
-
- CASE(PWR_TOKEN)
- Object->Sub_Type = PWR_STYPE;
- Parse_Float_Param2(&Object->exponent.x,&Object->exponent.y);
- END_CASE
-
- CASE(CUBE_TOKEN)
- Object->Sub_Type = CUBE_STYPE;
- END_CASE
-
- CASE(RECIPROCAL_TOKEN)
- Object->Sub_Type = RECIPROCAL_STYPE;
- END_CASE
-
- CASE(HYPERCOMPLEX_TOKEN)
- Object->Algebra = HYPERCOMPLEX_TYPE;
- END_CASE
-
- CASE(QUATERNION_TOKEN)
- Object->Algebra = QUATERNION_TYPE;
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
-
- END_EXPECT
-
- Parse_Object_Mods((OBJECT *)Object);
-
- SetUp_Fractal(Object);
-
- return((OBJECT *)Object);
- }
-
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * Parse_Polygon
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * OBJECT * -
- *
- * AUTHOR
- *
- * Dieter Bayer
- *
- * DESCRIPTION
- *
- * -
- *
- * CHANGES
- *
- * May 1994 : Creation.
- *
- * Oct 1994 : Modified to use new polygon data structure. [DB]
- *
- ******************************************************************************/
-
- static OBJECT *Parse_Polygon()
- {
- int i, closed = FALSE;
- int Number;
- POLYGON *Object;
- VECTOR *Points, P;
-
- Parse_Begin();
-
- if ((Object = (POLYGON *)Parse_Object_Id()) != NULL)
- {
- return((OBJECT *) Object);
- }
-
- Object = Create_Polygon();
-
- Number = (int)Parse_Float();
-
- if (Number < 3)
- {
- Error("Polygon needs at least three points.");
- }
-
- Points = (VECTOR *)POV_MALLOC((Number+1)*sizeof(VECTOR), "temporary polygon points");
-
- for (i = 0; i < Number; i++)
- {
- Parse_Comma();
-
- Parse_Vector(Points[i]);
- }
-
- /* Check for closed polygons. */
-
- Assign_Vector(P, Points[0]);
-
- for (i = 1; i < Number; i++)
- {
- closed = FALSE;
-
- if ((fabs(P[X] - Points[i][X]) < EPSILON) &&
- (fabs(P[Y] - Points[i][Y]) < EPSILON) &&
- (fabs(P[Z] - Points[i][Z]) < EPSILON))
- {
- i++;
-
- if (i < Number)
- {
- Assign_Vector(P, Points[i]);
- }
-
- closed = TRUE;
- }
- }
-
- if (!closed)
- {
- Warn(0.0, "Polygon not closed. Closing it.");
-
- Assign_Vector(Points[Number], P);
-
- Number++;
- }
-
- Compute_Polygon(Object, Number, Points);
-
- POV_FREE (Points);
-
- Parse_Object_Mods ((OBJECT *)Object);
-
- return((OBJECT *) Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * Parse_Prism
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * OBJECT * -
- *
- * AUTHOR
- *
- * Dieter Bayer
- *
- * DESCRIPTION
- *
- * -
- *
- * CHANGES
- *
- * May 1994 : Creation.
- *
- ******************************************************************************/
-
- static OBJECT *Parse_Prism()
- {
- int i, closed = FALSE;
- DBL h;
-
- PRISM *Object;
- UV_VECT *Points, P;
-
- Parse_Begin();
-
- if ((Object = (PRISM *)Parse_Object_Id()) != NULL)
- {
- return((OBJECT *) Object);
- }
-
- Object = Create_Prism();
-
- /*
- * Determine kind of spline used (linear, quadratic, cubic)
- * and type of sweeping (linear, conic).
- */
-
- EXPECT
- CASE(LINEAR_SPLINE_TOKEN)
- Object->Spline_Type = LINEAR_SPLINE;
- END_CASE
-
- CASE(QUADRATIC_SPLINE_TOKEN)
- Object->Spline_Type = QUADRATIC_SPLINE;
- END_CASE
-
- CASE(CUBIC_SPLINE_TOKEN)
- Object->Spline_Type = CUBIC_SPLINE;
- END_CASE
-
- CASE(LINEAR_SWEEP_TOKEN)
- Object->Sweep_Type = LINEAR_SWEEP;
- END_CASE
-
- CASE(CONIC_SWEEP_TOKEN)
- Object->Sweep_Type = CONIC_SWEEP;
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- /* Read prism heights. */
-
- Object->Height1 = Parse_Float(); Parse_Comma();
- Object->Height2 = Parse_Float(); Parse_Comma();
-
- if (Object->Height1 > Object->Height2)
- {
- h = Object->Height1;
- Object->Height1 = Object->Height2;
- Object->Height2 = h;
- }
-
- /* Get number of points = number of segments. */
-
- Object->Number = (int)Parse_Float();
-
- switch (Object->Spline_Type)
- {
- case LINEAR_SPLINE :
-
- if (Object->Number < 3)
- {
- Error("Prism with linear splines must have at least three points.");
- }
-
- break;
-
- case QUADRATIC_SPLINE :
-
- if (Object->Number < 5)
- {
- Error("Prism with quadratic splines must have at least five points.");
- }
-
- break;
-
- case CUBIC_SPLINE :
-
- if (Object->Number < 6)
- {
- Error("Prism with cubic splines must have at least six points.");
- }
- }
-
- /* Allocate Object->Number points for the prism. */
-
- Points = (UV_VECT *)POV_MALLOC((Object->Number+1) * sizeof(UV_VECT), "temporary prism points");
-
- /* Read points (x, y : coordinate of 2d point; z : not used). */
-
- for (i = 0; i < Object->Number; i++)
- {
- Parse_Comma();
-
- Parse_UV_Vect(Points[i]);
- }
-
- /* Closed or not closed that's the question. */
-
- EXPECT
- CASE(OPEN_TOKEN)
- Clear_Flag(Object, CLOSED_FLAG);
- EXIT
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- /* Check for closed prism. */
-
- switch (Object->Spline_Type)
- {
- case LINEAR_SPLINE :
-
- i = 1;
-
- Assign_UV_Vect(P, Points[0]);
-
- break;
-
- case QUADRATIC_SPLINE :
- case CUBIC_SPLINE :
-
- i = 2;
-
- Assign_UV_Vect(P, Points[1]);
-
- break;
- }
-
- for ( ; i < Object->Number; i++)
- {
- closed = FALSE;
-
- if ((fabs(P[X] - Points[i][X]) < EPSILON) &&
- (fabs(P[Y] - Points[i][Y]) < EPSILON))
- {
- switch (Object->Spline_Type)
- {
- case LINEAR_SPLINE :
-
- i++;
-
- if (i < Object->Number)
- {
- Assign_UV_Vect(P, Points[i]);
- }
-
- break;
-
- case QUADRATIC_SPLINE :
-
- i += 2;
-
- if (i < Object->Number)
- {
- Assign_UV_Vect(P, Points[i]);
- }
-
- break;
-
- case CUBIC_SPLINE :
-
- i += 3;
-
- if (i < Object->Number)
- {
- Assign_UV_Vect(P, Points[i]);
- }
-
- break;
- }
-
- closed = TRUE;
- }
- }
-
- if (!closed)
- {
- if (Object->Spline_Type == LINEAR_SPLINE)
- {
- Assign_UV_Vect(Points[Object->Number], P);
-
- Object->Number++;
-
- Warn(0.0, "Linear prism not closed. Closing it.");
- }
- else
- {
- Set_Flag(Object, DEGENERATE_FLAG);
-
- Warn(0.0, "Prism not closed. Ignoring it.");
- }
- }
-
- /* Compute spline segments. */
-
- Compute_Prism(Object, Points);
-
- /* Compute bounding box. */
-
- Compute_Prism_BBox(Object);
-
- /* Parse object's modifiers. */
-
- Parse_Object_Mods((OBJECT *)Object);
-
- /* Destroy temporary points. */
-
- POV_FREE (Points);
-
- return((OBJECT *) Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * Parse_Sor
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * OBJECT * -
- *
- * AUTHOR
- *
- * Dieter Bayer
- *
- * DESCRIPTION
- *
- * Read a surface of revolution primitive.
- *
- * CHANGES
- *
- * May 1994 : Creation.
- *
- ******************************************************************************/
-
- static OBJECT *Parse_Sor()
- {
- int i;
- SOR *Object;
- UV_VECT *Points;
-
- Parse_Begin();
-
- if ((Object = (SOR *)Parse_Object_Id()) != NULL)
- {
- return((OBJECT *)Object);
- }
-
- Object = Create_Sor();
-
- /* Get number of points. */
-
- Object->Number = (int)Parse_Float();
-
- if (Object->Number <4)
- {
- Error("Surface of revolution must have at least four points.");
- }
-
- /* Get temporary points describing the rotated curve. */
-
- Points = (UV_VECT *)POV_MALLOC(Object->Number*sizeof(UV_VECT), "temporary surface of revolution points");
-
- /* Read points (x : radius; y : height; z : not used). */
-
- for (i = 0; i < Object->Number; i++)
- {
- Parse_Comma();
-
- Parse_UV_Vect(Points[i]);
-
- if ((Points[i][X] < 0.0) ||
- ((i > 1 ) && (i < Object->Number - 1) && (Points[i][Y] <= Points[i-1][Y])))
- {
- Error("Incorrect point in surface of revolution.");
- }
- }
-
- /* Closed or not closed that's the question. */
-
- EXPECT
- CASE(OPEN_TOKEN)
- Clear_Flag(Object, CLOSED_FLAG);
- EXIT
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- /* There are Number-3 segments! */
-
- Object->Number -= 3;
-
- /* Compute spline segments. */
-
- Compute_Sor(Object, Points);
-
- /* Compute bounding box. */
-
- Compute_Sor_BBox(Object);
-
- /* Parse object's modifiers. */
-
- Parse_Object_Mods((OBJECT *)Object);
-
- /* Destroy temporary points. */
-
- POV_FREE (Points);
-
- return ((OBJECT *) Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * Parse_Lathe
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * OBJECT * -
- *
- * AUTHOR
- *
- * Dieter Bayer
- *
- * DESCRIPTION
- *
- * Read a lathe primitive.
- *
- * CHANGES
- *
- * Jun 1994 : Creation.
- *
- ******************************************************************************/
-
- static OBJECT *Parse_Lathe()
- {
- int i;
- LATHE *Object;
- UV_VECT *Points;
-
- Parse_Begin();
-
- if ((Object = (LATHE *)Parse_Object_Id()) != NULL)
- {
- return((OBJECT *)Object);
- }
-
- Object = Create_Lathe();
-
- /* Determine kind of spline used and aspect ratio. */
-
- EXPECT
- CASE(LINEAR_SPLINE_TOKEN)
- Object->Spline_Type = LINEAR_SPLINE;
- END_CASE
-
- CASE(QUADRATIC_SPLINE_TOKEN)
- Object->Spline_Type = QUADRATIC_SPLINE;
- END_CASE
-
- CASE(CUBIC_SPLINE_TOKEN)
- Object->Spline_Type = CUBIC_SPLINE;
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- /* Get number of points. */
-
- Object->Number = (int)Parse_Float();
-
- /* Get temporary points describing the rotated curve. */
-
- Points = (UV_VECT *)POV_MALLOC(Object->Number*sizeof(UV_VECT), "temporary lathe points");
-
- /* Read points (x : radius; y : height; z : not used). */
-
- for (i = 0; i < Object->Number; i++)
- {
- Parse_Comma();
-
- Parse_UV_Vect(Points[i]);
-
- if (Points[i][X] < 0.0)
- {
- Error("Incorrect point in lathe.");
- }
- }
-
- switch (Object->Spline_Type)
- {
- case LINEAR_SPLINE :
-
- Object->Number--;
-
- break;
-
- case QUADRATIC_SPLINE :
-
- Object->Number -= 2;
-
- break;
-
- case CUBIC_SPLINE :
-
- Object->Number -= 3;
-
- break;
- }
-
- if (Object->Number <1)
- {
- Error("Lathe must have at least one segment.");
- }
-
- /* Compute spline segments. */
-
- Compute_Lathe(Object, Points);
-
- /* Compute bounding box. */
-
- Compute_Lathe_BBox(Object);
-
- /* Parse object's modifiers. */
-
- Parse_Object_Mods((OBJECT *)Object);
-
- /* Destroy temporary points. */
-
- POV_FREE (Points);
-
- return((OBJECT *) Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * Parse_Superellipsoid
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * OBJECT * -
- *
- * AUTHOR
- *
- * Dieter Bayer
- *
- * DESCRIPTION
- *
- * Read a superellipsoid primitive.
- *
- * CHANGES
- *
- * Oct 1994 : Creation.
- *
- ******************************************************************************/
-
- static OBJECT *Parse_Superellipsoid()
- {
- UV_VECT V1;
- SUPERELLIPSOID *Object;
-
- Parse_Begin();
-
- if ((Object = (SUPERELLIPSOID *)Parse_Object_Id()) != NULL)
- {
- return((OBJECT *)Object);
- }
-
- Object = Create_Superellipsoid();
-
- Parse_UV_Vect(V1);
-
- /* The x component is e, the y component is n. */
-
- Object->Power[X] = 2.0 / V1[X];
- Object->Power[Y] = V1[X] / V1[Y];
- Object->Power[Z] = 2.0 / V1[Y];
-
- /* Compute bounding box. */
-
- Compute_Superellipsoid_BBox(Object);
-
- /* Parse object's modifiers. */
-
- Parse_Object_Mods((OBJECT *)Object);
-
- return((OBJECT *) Object);
- }
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * Parse_Torus
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * OBJECT
- *
- * AUTHOR
- *
- * Dieter Bayer
- *
- * DESCRIPTION
- *
- * -
- *
- * CHANGES
- *
- * Jul 1994 : Creation.
- *
- ******************************************************************************/
-
- static OBJECT *Parse_Torus()
- {
- TORUS *Object;
-
- Parse_Begin();
-
- if ((Object = (TORUS *)Parse_Object_Id()) != NULL)
- {
- return((OBJECT *)Object);
- }
-
- Object = Create_Torus();
-
- /* Read in the two radii. */
-
- Object->R = Parse_Float(); /* Big radius */
-
- Parse_Comma();
-
- Object->r = Parse_Float(); /* Little radius */
-
- Compute_Torus_BBox(Object);
-
- Parse_Object_Mods ((OBJECT *)Object);
-
- return ((OBJECT *) Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * Parse_Mesh_Texture
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * OBJECT
- *
- * AUTHOR
- *
- * Dieter Bayer
- *
- * DESCRIPTION
- *
- * Read an individual triangle mesh texture.
- *
- * CHANGES
- *
- * Feb 1995 : Creation.
- *
- ******************************************************************************/
-
- static TEXTURE *Parse_Mesh_Texture()
- {
- TEXTURE *Texture;
-
- Texture = NULL;
-
- EXPECT
- CASE(TEXTURE_TOKEN)
- Parse_Begin();
-
- GET(TEXTURE_ID_TOKEN);
-
- Texture = (TEXTURE *)Token.Constant_Data;
-
- Parse_End();
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- return(Texture);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * Parse_Mesh
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * OBJECT
- *
- * AUTHOR
- *
- * Dieter Bayer
- *
- * DESCRIPTION
- *
- * Read a triangle mesh.
- *
- * CHANGES
- *
- * Feb 1995 : Creation.
- *
- ******************************************************************************/
-
- static OBJECT *Parse_Mesh()
- {
- int i;
- int number_of_normals, number_of_textures, number_of_triangles, number_of_vertices;
- int max_normals, max_textures, max_triangles, max_vertices;
- DBL l1, l2, l3;
- VECTOR D1, D2, P1, P2, P3, N1, N2, N3, N;
- SNGL_VECT *Normals, *Vertices;
- TEXTURE **Textures;
- MESH *Object;
- MESH_TRIANGLE *Triangles;
-
- Parse_Begin();
-
- if ((Object = (MESH *)Parse_Object_Id()) != NULL)
- {
- return((OBJECT *)Object);
- }
-
- /* Create object. */
-
- Object = Create_Mesh();
-
- /* Allocate temporary normals, textures, triangles and vertices. */
-
- max_normals = 256;
-
- max_vertices = 256;
-
- max_textures = 16;
-
- max_triangles = 256;
-
- Normals = (SNGL_VECT *)POV_MALLOC(max_normals*sizeof(SNGL_VECT), "temporary triangle mesh data");
-
- Textures = (TEXTURE **)POV_MALLOC(max_textures*sizeof(TEXTURE *), "temporary triangle mesh data");
-
- Triangles = (MESH_TRIANGLE *)POV_MALLOC(max_triangles*sizeof(MESH_TRIANGLE), "temporary triangle mesh data");
-
- Vertices = (SNGL_VECT *)POV_MALLOC(max_vertices*sizeof(SNGL_VECT), "temporary triangle mesh data");
-
- /* Read raw triangle file. */
-
- number_of_normals = 0;
-
- number_of_textures = 0;
-
- number_of_triangles = 0;
-
- number_of_vertices = 0;
-
- /* Create hash tables. */
-
- Create_Mesh_Hash_Tables();
-
- EXPECT
- CASE(TRIANGLE_TOKEN)
- Parse_Begin();
-
- Parse_Vector(P1); Parse_Comma();
- Parse_Vector(P2); Parse_Comma();
- Parse_Vector(P3);
-
- if (!Mesh_Degenerate(P1, P2, P3))
- {
- if (number_of_triangles >= max_triangles)
- {
- if (max_triangles >= INT_MAX/2)
- {
- Error("Too many triangles in triangle mesh.\n");
- }
-
- max_triangles *= 2;
-
- Triangles = (MESH_TRIANGLE *)POV_REALLOC(Triangles, max_triangles*sizeof(MESH_TRIANGLE), "triangle triangle mesh data");
- }
-
- /* Init triangle. */
-
- Init_Mesh_Triangle(&Triangles[number_of_triangles]);
-
- Triangles[number_of_triangles].P1 = Mesh_Hash_Vertex(&number_of_vertices, &max_vertices, &Vertices, P1);
- Triangles[number_of_triangles].P2 = Mesh_Hash_Vertex(&number_of_vertices, &max_vertices, &Vertices, P2);
- Triangles[number_of_triangles].P3 = Mesh_Hash_Vertex(&number_of_vertices, &max_vertices, &Vertices, P3);
-
- Compute_Mesh_Triangle(&Triangles[number_of_triangles], FALSE, P1, P2, P3, N);
-
- Triangles[number_of_triangles].Normal_Ind = Mesh_Hash_Normal(&number_of_normals, &max_normals, &Normals, N);
-
- Triangles[number_of_triangles].Texture = Mesh_Hash_Texture(&number_of_textures, &max_textures, &Textures, Parse_Mesh_Texture());
-
- number_of_triangles++;
- }
-
- Parse_End();
- END_CASE
-
- CASE(SMOOTH_TRIANGLE_TOKEN)
- Parse_Begin();
-
- Parse_Vector(P1); Parse_Comma();
- Parse_Vector(N1); Parse_Comma();
-
- Parse_Vector(P2); Parse_Comma();
- Parse_Vector(N2); Parse_Comma();
-
- Parse_Vector(P3); Parse_Comma();
- Parse_Vector(N3);
-
- VLength(l1, N1);
- VLength(l2, N2);
- VLength(l3, N3);
-
- if ((l1 != 0.0) && (l2 != 0.0) && (l3 != 0.0) && (!Mesh_Degenerate(P1, P2, P3)))
- {
- if (number_of_triangles >= max_triangles)
- {
- if (max_triangles >= INT_MAX/2)
- {
- Error("Too many triangles in triangle mesh.\n");
- }
-
- max_triangles *= 2;
-
- Triangles = (MESH_TRIANGLE *)POV_REALLOC(Triangles, max_triangles*sizeof(MESH_TRIANGLE), "triangle triangle mesh data");
- }
-
- VInverseScaleEq(N1, l1);
- VInverseScaleEq(N2, l2);
- VInverseScaleEq(N3, l3);
-
- /* Init triangle. */
-
- Init_Mesh_Triangle(&Triangles[number_of_triangles]);
-
- Triangles[number_of_triangles].P1 = Mesh_Hash_Vertex(&number_of_vertices, &max_vertices, &Vertices, P1);
- Triangles[number_of_triangles].P2 = Mesh_Hash_Vertex(&number_of_vertices, &max_vertices, &Vertices, P2);
- Triangles[number_of_triangles].P3 = Mesh_Hash_Vertex(&number_of_vertices, &max_vertices, &Vertices, P3);
-
- /* Check for equal normals. */
-
- VSub(D1, N1, N2);
- VSub(D2, N1, N3);
-
- VDot(l1, D1, D1);
- VDot(l2, D2, D2);
-
- if ((fabs(l1) > EPSILON) && (fabs(l2) > EPSILON))
- {
- /* Smooth triangle. */
-
- Triangles[number_of_triangles].N1 = Mesh_Hash_Normal(&number_of_normals, &max_normals, &Normals, N1);
- Triangles[number_of_triangles].N2 = Mesh_Hash_Normal(&number_of_normals, &max_normals, &Normals, N2);
- Triangles[number_of_triangles].N3 = Mesh_Hash_Normal(&number_of_normals, &max_normals, &Normals, N3);
-
- Compute_Mesh_Triangle(&Triangles[number_of_triangles], TRUE, P1, P2, P3, N);
- }
- else
- {
- /* Flat triangle. */
-
- Compute_Mesh_Triangle(&Triangles[number_of_triangles], FALSE, P1, P2, P3, N);
- }
-
- Triangles[number_of_triangles].Normal_Ind = Mesh_Hash_Normal(&number_of_normals, &max_normals, &Normals, N);
-
- Triangles[number_of_triangles].Texture = Mesh_Hash_Texture(&number_of_textures, &max_textures, &Textures, Parse_Mesh_Texture());
-
- number_of_triangles++;
- }
-
- Parse_End();
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- /* Destroy hash tables. */
-
- Destroy_Mesh_Hash_Tables();
-
- /* If there are no triangles something went wrong. */
-
- if (number_of_triangles == 0)
- {
- Error("No triangles in triangle mesh.\n");
- }
-
- /* Init triangle mesh data. */
-
- Object->Data = POV_MALLOC(sizeof(MESH_DATA), "triangle mesh data");
-
- Object->Data->References = 1;
-
- Object->Data->Tree = NULL;
-
- Object->Data->Normals = NULL;
- Object->Data->Textures = NULL;
- Object->Data->Triangles = NULL;
- Object->Data->Vertices = NULL;
-
- /* Allocate memory for normals, textures, triangles and vertices. */
-
- Object->Data->Number_Of_Normals = number_of_normals;
-
- Object->Data->Number_Of_Textures = number_of_textures;
-
- Object->Data->Number_Of_Triangles = number_of_triangles;
-
- Object->Data->Number_Of_Vertices = number_of_vertices;
-
- Object->Data->Normals = (SNGL_VECT *)POV_MALLOC(number_of_normals*sizeof(SNGL_VECT), "triangle mesh data");
-
- if (number_of_textures)
- {
- Set_Flag(Object, MULTITEXTURE_FLAG);
-
- Object->Data->Textures = (TEXTURE **)POV_MALLOC(number_of_textures*sizeof(TEXTURE *), "triangle mesh data");
- }
-
- Object->Data->Triangles = (MESH_TRIANGLE *)POV_MALLOC(number_of_triangles*sizeof(MESH_TRIANGLE), "triangle mesh data");
-
- Object->Data->Vertices = (SNGL_VECT *)POV_MALLOC(number_of_vertices*sizeof(SNGL_VECT), "triangle mesh data");
-
- /* Copy normals, textures, triangles and vertices into mesh. */
-
- for (i = 0; i < number_of_normals; i++)
- {
- Assign_SNGL_Vect(Object->Data->Normals[i], Normals[i]);
- }
-
- for (i = 0; i < number_of_textures; i++)
- {
- Object->Data->Textures[i] = Textures[i];
- }
-
- for (i = 0; i < number_of_triangles; i++)
- {
- Object->Data->Triangles[i] = Triangles[i];
- }
-
- for (i = 0; i < number_of_vertices; i++)
- {
- Assign_SNGL_Vect(Object->Data->Vertices[i], Vertices[i]);
- }
-
- /* Free temporary memory. */
-
- POV_FREE(Normals);
- POV_FREE(Textures);
- POV_FREE(Triangles);
- POV_FREE(Vertices);
-
- /*
- Render_Info("Mesh: %ld bytes: %ld vertices, %ld normals, %ld textures, %ld triangles\n",
- Object->Data->Number_Of_Normals*sizeof(SNGL_VECT)+
- Object->Data->Number_Of_Textures*sizeof(TEXTURE *)+
- Object->Data->Number_Of_Triangles*sizeof(MESH_TRIANGLE)+
- Object->Data->Number_Of_Vertices*sizeof(SNGL_VECT),
- Object->Data->Number_Of_Vertices,
- Object->Data->Number_Of_Normals,
- Object->Data->Number_Of_Textures,
- Object->Data->Number_Of_Triangles);
- */
-
- /* Create bounding box. */
-
- Compute_Mesh_BBox(Object);
-
- /* Parse object modifiers. */
-
- Parse_Object_Mods((OBJECT *)Object);
-
- /* Create bounding box tree. */
-
- Build_Mesh_BBox_Tree(Object);
-
- return((OBJECT *)Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static
- OBJECT *Parse_Poly (order)
- int order;
- {
- POLY *Object;
-
- Parse_Begin ();
-
- if ( (Object = (POLY *)Parse_Object_Id()) != NULL)
- return ((OBJECT *) Object);
-
- if (order == 0)
- {
- order = (int)Parse_Float(); Parse_Comma();
- if (order < 2 || order > MAX_ORDER)
- Error("Order of poly is out of range.");
- }
-
- Object = Create_Poly(order);
-
- Parse_Coeffs(Object->Order, &(Object->Coeffs[0]));
-
- Compute_Poly_BBox(Object);
-
- Parse_Object_Mods ((OBJECT *)Object);
-
- return ((OBJECT *) Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static
- OBJECT *Parse_Bicubic_Patch ()
- {
- BICUBIC_PATCH *Object;
- int i, j;
-
- Parse_Begin ();
-
- if ( (Object = (BICUBIC_PATCH *)Parse_Object_Id()) != NULL)
- return ((OBJECT *) Object);
-
- Object = Create_Bicubic_Patch();
-
- EXPECT
- CASE_FLOAT
- Warn(1.5, "Should use keywords for bicubic parameters.");
- Object->Patch_Type = (int)Parse_Float();
- if (Object->Patch_Type == 2 ||
- Object->Patch_Type == 3)
- Object->Flatness_Value = Parse_Float();
- else
- Object->Flatness_Value = 0.1;
- Object->U_Steps = (int)Parse_Float();
- Object->V_Steps = (int)Parse_Float();
- EXIT
- END_CASE
-
- CASE (TYPE_TOKEN)
- Object->Patch_Type = (int)Parse_Float();
- END_CASE
-
- CASE (FLATNESS_TOKEN)
- Object->Flatness_Value = Parse_Float();
- END_CASE
-
- CASE (V_STEPS_TOKEN)
- Object->V_Steps = (int)Parse_Float();
- END_CASE
-
- CASE (U_STEPS_TOKEN)
- Object->U_Steps = (int)Parse_Float();
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- if (Object->Patch_Type > 1)
- {
- Object->Patch_Type = 1;
- Warn(0.0, "Patch type no longer supported. Using type 1.");
- }
-
- if ((Object->Patch_Type < 0) || (Object->Patch_Type > MAX_PATCH_TYPE))
- Error("Undefined bicubic patch type.");
-
- Parse_Comma();
- for (i=0;i<4;i++)
- for (j=0;j<4;j++)
- {
- Parse_Vector(Object->Control_Points[i][j]);
- if (!((i==3)&&(j==3)))
- Parse_Comma();
- };
- Precompute_Patch_Values(Object); /* interpolated mesh coords */
-
- Compute_Bicubic_Patch_BBox(Object);
-
- Parse_Object_Mods ((OBJECT *)Object);
-
- return ((OBJECT *) Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static
- OBJECT *Parse_TrueType ()
- {
- OBJECT *Object;
- char *filename, *text_string;
- DBL depth;
- VECTOR offset;
-
- Parse_Begin ();
-
- GET(TTF_TOKEN);
-
- if ( (Object = (OBJECT *)Parse_Object_Id()) != NULL)
- return ((OBJECT *) Object);
-
- Object = (OBJECT *)Create_CSG_Union ();
- /*** Object = Create_TTF(); */
-
- /* Parse the TrueType font file name */
- filename = Parse_String();
- Parse_Comma();
-
- /* Parse the text string to be rendered */
- text_string = Parse_String();
- Parse_Comma();
-
- /* Get the extrusion depth */
- depth = Parse_Float(); Parse_Comma ();
-
- /* Get the offset vector */
- Parse_Vector(offset);
-
- /* Process all this good info */
- ProcessNewTTF((OBJECT *)Object, filename, text_string, depth, offset);
-
- /* Free up the filename and text string memory */
- POV_FREE (filename);
- POV_FREE (text_string);
-
- /**** Compute_TTF_BBox(Object); */
- Compute_CSG_BBox((OBJECT *)Object);
-
- /* Get any rotate/translate or texturing stuff */
- Parse_Object_Mods ((OBJECT *)Object);
-
- return ((OBJECT *) Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static
- OBJECT *Parse_CSG (CSG_Type)
- int CSG_Type;
- {
- CSG *Object;
- OBJECT *Local;
- int Object_Count = 0;
-
- Parse_Begin ();
-
- if ( (Object = (CSG *)Parse_Object_Id()) != NULL)
- return ((OBJECT *) Object);
-
- if (CSG_Type & CSG_UNION_TYPE)
- Object = Create_CSG_Union ();
- else
- if (CSG_Type & CSG_MERGE_TYPE)
- Object = Create_CSG_Merge ();
- else
- Object = Create_CSG_Intersection ();
-
- Object->Children = NULL;
-
- while ((Local = Parse_Object ()) != NULL)
- {
- if ((CSG_Type & CSG_INTERSECTION_TYPE) && (Local->Type & PATCH_OBJECT))
- Warn(0.0, "Patch objects not allowed in intersection.");
- Object_Count++;
- if ((CSG_Type & CSG_DIFFERENCE_TYPE) && (Object_Count > 1))
- Invert_Object (Local);
- Object->Type |= (Local->Type & CHILDREN_FLAGS);
- Local->Type |= IS_CHILD_OBJECT;
- Link(Local, &Local->Sibling, &Object->Children);
- };
-
- if ((Object_Count < 2) && (opts.Language_Version >= 1.5))
- Warn(1.5, "Should have at least 2 objects in csg.");
-
- Compute_CSG_BBox((OBJECT *)Object);
-
- Parse_Object_Mods ((OBJECT *)Object);
-
- return ((OBJECT *) Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static
- OBJECT *Parse_Light_Source ()
- {
- DBL Len;
- VECTOR Local_Vector;
- MATRIX Local_Matrix;
- TRANSFORM Local_Trans;
- LIGHT_SOURCE *Object;
-
- Parse_Begin ();
-
- if ( (Object = (LIGHT_SOURCE *)Parse_Object_Id()) != NULL)
- return ((OBJECT *) Object);
-
- Object = Create_Light_Source ();
-
- Parse_Vector(Object->Center);
-
- Parse_Comma();
-
- Parse_Colour (Object->Colour);
-
- EXPECT
- CASE (LOOKS_LIKE_TOKEN)
- if (Object->Children != NULL)
- Error("Only one looks_like allowed per light_source.");
- Parse_Begin ();
- Object->Type &= ~(int)PATCH_OBJECT;
- if ((Object->Children = Parse_Object ()) == NULL)
- Parse_Error_Str ("object");
- Compute_Translation_Transform(&Local_Trans, Object->Center);
- Translate_Object (Object->Children, Object->Center, &Local_Trans);
- Parse_Object_Mods (Object->Children);
- Set_Flag(Object->Children, NO_SHADOW_FLAG);
- Set_Flag(Object, NO_SHADOW_FLAG);
- Object->Type |= (Object->Children->Type & CHILDREN_FLAGS);
- END_CASE
-
- CASE (FILL_LIGHT_TOKEN)
- Object->Light_Type = FILL_LIGHT_SOURCE;
- END_CASE
-
- CASE (SPOTLIGHT_TOKEN)
- Object->Light_Type = SPOT_SOURCE;
- END_CASE
-
- CASE (CYLINDER_TOKEN)
- Object->Light_Type = CYLINDER_SOURCE;
- END_CASE
-
- CASE (POINT_AT_TOKEN)
- if ((Object->Light_Type == SPOT_SOURCE) || (Object->Light_Type == CYLINDER_SOURCE))
- Parse_Vector(Object->Points_At);
- else
- Not_With ("point_at","standard light source");
- END_CASE
-
- CASE (TIGHTNESS_TOKEN)
- if ((Object->Light_Type == SPOT_SOURCE) || (Object->Light_Type == CYLINDER_SOURCE))
- Object->Coeff = Parse_Float();
- else
- Not_With ("tightness","standard light source");
- END_CASE
-
- CASE (RADIUS_TOKEN)
- if ((Object->Light_Type == SPOT_SOURCE) || (Object->Light_Type == CYLINDER_SOURCE))
- Object->Radius = Parse_Float();
- else
- Not_With ("radius","standard light source");
- END_CASE
-
- CASE (FALLOFF_TOKEN)
- if ((Object->Light_Type == SPOT_SOURCE) || (Object->Light_Type == CYLINDER_SOURCE))
- Object->Falloff = Parse_Float();
- else
- Not_With ("falloff","standard light source");
- END_CASE
-
- CASE (FADE_DISTANCE_TOKEN)
- Object->Fade_Distance = Parse_Float();
- END_CASE
-
- CASE (FADE_POWER_TOKEN)
- Object->Fade_Power = Parse_Float();
- END_CASE
-
- CASE (AREA_LIGHT_TOKEN)
- Object->Area_Light = TRUE;
- Parse_Vector (Object->Axis1); Parse_Comma ();
- Parse_Vector (Object->Axis2); Parse_Comma ();
- Object->Area_Size1 = (int)Parse_Float(); Parse_Comma ();
- Object->Area_Size2 = (int)Parse_Float();
- Object->Light_Grid = Create_Light_Grid (Object->Area_Size1, Object->Area_Size2);
- END_CASE
-
- CASE (JITTER_TOKEN)
- Object->Jitter = TRUE;
- END_CASE
-
- CASE (TRACK_TOKEN)
- Object->Track = TRUE;
- END_CASE
-
- CASE (ADAPTIVE_TOKEN)
- Object->Adaptive_Level = (int)Parse_Float();
- END_CASE
-
- CASE (ATMOSPHERIC_ATTENUATION_TOKEN)
- Object->Atmospheric_Attenuation = Allow_Float(1.0) > 0.0;
- END_CASE
-
- CASE (ATMOSPHERE_TOKEN)
- Object->Atmosphere_Interaction = Allow_Float(1.0) > 0.0;
- END_CASE
-
- CASE (TRANSLATE_TOKEN)
- Parse_Vector (Local_Vector);
- Compute_Translation_Transform(&Local_Trans, Local_Vector);
- Translate_Object ((OBJECT *)Object, Local_Vector, &Local_Trans);
- END_CASE
-
- CASE (ROTATE_TOKEN)
- Parse_Vector (Local_Vector);
- Compute_Rotation_Transform(&Local_Trans, Local_Vector);
- Rotate_Object ((OBJECT *)Object, Local_Vector, &Local_Trans);
- END_CASE
-
- CASE (SCALE_TOKEN)
- Parse_Scale_Vector (Local_Vector);
- Compute_Scaling_Transform(&Local_Trans, Local_Vector);
- Scale_Object ((OBJECT *)Object, Local_Vector, &Local_Trans);
- END_CASE
-
- CASE (TRANSFORM_TOKEN)
- GET(TRANSFORM_ID_TOKEN)
- Transform_Object ((OBJECT *)Object, (TRANSFORM *)Token.Constant_Data);
- END_CASE
-
- CASE (MATRIX_TOKEN)
- Parse_Matrix (Local_Matrix);
- Compute_Matrix_Transform(&Local_Trans, Local_Matrix);
- Transform_Object ((OBJECT *)Object, &Local_Trans);
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- Parse_End ();
-
- if (Object->Light_Type == SPOT_SOURCE)
- {
- Object->Radius = cos(Object->Radius * M_PI / 180.0);
- Object->Falloff = cos(Object->Falloff * M_PI / 180.0);
- }
-
- VSub(Object->Direction, Object->Points_At, Object->Center);
-
- VLength(Len, Object->Direction);
-
- if (Len > EPSILON)
- {
- VInverseScaleEq(Object->Direction, Len);
- }
-
- return ((OBJECT *)Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- OBJECT *Parse_Object ()
- {
- OBJECT *Object = NULL;
-
- EXPECT
-
- CASE (JULIA_FRACTAL_TOKEN)
- Object = Parse_Julia_Fractal ();
- EXIT
- END_CASE
-
- CASE (SPHERE_TOKEN)
- Object = Parse_Sphere ();
- EXIT
- END_CASE
-
- CASE (PLANE_TOKEN)
- Object = Parse_Plane ();
- EXIT
- END_CASE
-
- CASE (CONE_TOKEN)
- Object = Parse_Cone ();
- EXIT
- END_CASE
-
- CASE (CYLINDER_TOKEN)
- Object = Parse_Cylinder ();
- EXIT
- END_CASE
-
- CASE (DISC_TOKEN)
- Object = Parse_Disc ();
- EXIT
- END_CASE
-
- CASE (QUADRIC_TOKEN)
- Object = Parse_Quadric ();
- EXIT
- END_CASE
-
- CASE (CUBIC_TOKEN)
- Object = Parse_Poly (3);
- EXIT
- END_CASE
-
- CASE (QUARTIC_TOKEN)
- Object = Parse_Poly (4);
- EXIT
- END_CASE
-
- CASE (POLY_TOKEN)
- Object = Parse_Poly (0);
- EXIT
- END_CASE
-
- CASE (TORUS_TOKEN)
- Object = Parse_Torus ();
- EXIT
- END_CASE
-
- /* Parse lathe primitive. [DB 8/94] */
-
- CASE (LATHE_TOKEN)
- Object = Parse_Lathe();
- EXIT
- END_CASE
-
- /* Parse polygon primitive. [DB 8/94] */
-
- CASE (POLYGON_TOKEN)
- Object = Parse_Polygon();
- EXIT
- END_CASE
-
- /* Parse prism primitive. [DB 8/94] */
-
- CASE (PRISM_TOKEN)
- Object = Parse_Prism();
- EXIT
- END_CASE
-
- /* Parse surface of revolution primitive. [DB 8/94] */
-
- CASE (SOR_TOKEN)
- Object = Parse_Sor();
- EXIT
- END_CASE
-
- /* Parse superellipsoid primitive. [DB 11/94] */
-
- CASE (SUPERELLIPSOID_TOKEN)
- Object = Parse_Superellipsoid();
- EXIT
- END_CASE
-
- /* Parse triangle mesh primitive. [DB 2/95] */
-
- CASE (MESH_TOKEN)
- Object = Parse_Mesh();
- EXIT
- END_CASE
-
- CASE (TEXT_TOKEN)
- Object = Parse_TrueType ();
- EXIT
- END_CASE
-
- CASE (OBJECT_ID_TOKEN)
- Object = Copy_Object((OBJECT *) Token.Constant_Data);
- EXIT
- END_CASE
-
- CASE (UNION_TOKEN)
- Object = Parse_CSG (CSG_UNION_TYPE);
- EXIT
- END_CASE
-
- CASE (COMPOSITE_TOKEN)
- Warn(1.5, "Use union instead of composite.");
- Object = Parse_CSG (CSG_UNION_TYPE);
- EXIT
- END_CASE
-
- CASE (MERGE_TOKEN)
- Object = Parse_CSG (CSG_MERGE_TYPE);
- EXIT
- END_CASE
-
- CASE (INTERSECTION_TOKEN)
- Object = Parse_CSG (CSG_INTERSECTION_TYPE);
- EXIT
- END_CASE
-
- CASE (DIFFERENCE_TOKEN)
- Object = Parse_CSG (CSG_DIFFERENCE_TYPE+CSG_INTERSECTION_TYPE);
- EXIT
- END_CASE
-
- CASE (BICUBIC_PATCH_TOKEN)
- Object = Parse_Bicubic_Patch ();
- EXIT
- END_CASE
-
- CASE (TRIANGLE_TOKEN)
- Object = Parse_Triangle ();
- EXIT
- END_CASE
-
- CASE (SMOOTH_TRIANGLE_TOKEN)
- Object = Parse_Smooth_Triangle ();
- EXIT
- END_CASE
-
- CASE (HEIGHT_FIELD_TOKEN)
- Object = Parse_HField ();
- EXIT
- END_CASE
-
- CASE (BOX_TOKEN)
- Object = Parse_Box ();
- EXIT
- END_CASE
-
- CASE (BLOB_TOKEN)
- Object = Parse_Blob ();
- EXIT
- END_CASE
-
- CASE (LIGHT_SOURCE_TOKEN)
- Object = Parse_Light_Source ();
- EXIT
- END_CASE
-
- CASE (OBJECT_TOKEN)
- Parse_Begin ();
- Object = Parse_Object ();
- if (!Object)
- Parse_Error_Str ("object");
- Parse_Object_Mods ((OBJECT *)Object);
- EXIT
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- return ((OBJECT *) Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- void Parse_Default ()
- {
- TEXTURE *Local_Texture;
- PIGMENT *Local_Pigment;
- TNORMAL *Local_Tnormal;
- FINISH *Local_Finish;
- HALO *Local_Halo;
-
- Not_In_Default = FALSE;
- Parse_Begin();
-
- EXPECT
- CASE (TEXTURE_TOKEN)
- Local_Texture = Default_Texture;
- Parse_Begin ();
- Default_Texture = Parse_Texture();
- Parse_End ();
- if (Default_Texture->Type != PLAIN_PATTERN)
- Error("Default texture cannot be material map or tiles.");
- if (Default_Texture->Next != NULL)
- Error("Default texture cannot be layered.");
- Destroy_Textures(Local_Texture);
- END_CASE
-
- CASE (PIGMENT_TOKEN)
- Local_Pigment = Copy_Pigment((Default_Texture->Pigment));
- Parse_Begin ();
- Parse_Pigment (&Local_Pigment);
- Parse_End ();
- Destroy_Pigment(Default_Texture->Pigment);
- Default_Texture->Pigment = Local_Pigment;
- END_CASE
-
- CASE (TNORMAL_TOKEN)
- Local_Tnormal = Copy_Tnormal((Default_Texture->Tnormal));
- Parse_Begin ();
- Parse_Tnormal (&Local_Tnormal);
- Parse_End ();
- Destroy_Tnormal(Default_Texture->Tnormal);
- Default_Texture->Tnormal = Local_Tnormal;
- END_CASE
-
- CASE (FINISH_TOKEN)
- Local_Finish = Copy_Finish((Default_Texture->Finish));
- Parse_Finish (&Local_Finish);
- Destroy_Finish(Default_Texture->Finish);
- Default_Texture->Finish = Local_Finish;
- END_CASE
-
- CASE (HALO_TOKEN)
- Local_Halo = Copy_Halo((Default_Texture->Halo));
- Parse_Halo (&Local_Halo);
- Destroy_Halo(Default_Texture->Halo);
- Default_Texture->Halo = Local_Halo;
- END_CASE
-
- CASE (CAMERA_TOKEN)
- Parse_Camera (&Default_Camera);
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- Parse_End();
-
- Not_In_Default = TRUE;
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static void Parse_Frame ()
- {
- OBJECT *Object;
- RAINBOW *Local_Rainbow;
- FOG *Local_Fog;
- SKYSPHERE *Local_Skysphere;
- ATMOSPHERE *Local_Atmosphere;
-
- EXPECT
- CASE (RAINBOW_TOKEN)
- Local_Rainbow = Parse_Rainbow();
- Local_Rainbow->Next = Frame.Rainbow;
- Frame.Rainbow = Local_Rainbow;
- END_CASE
-
- CASE (SKYSPHERE_TOKEN)
- Local_Skysphere = Parse_Skysphere();
- if (Frame.Skysphere != NULL)
- {
- Warn(0.0, "Only one sky-sphere allowed (last one will be used).");
- Destroy_Skysphere(Frame.Skysphere);
- }
- Frame.Skysphere = Local_Skysphere;
- END_CASE
-
- CASE (FOG_TOKEN)
- Local_Fog = Parse_Fog();
- Local_Fog->Next = Frame.Fog;
- Frame.Fog = Local_Fog;
- END_CASE
-
- CASE (ATMOSPHERE_TOKEN)
- Local_Atmosphere = Parse_Atmosphere();
- if (Frame.Atmosphere != NULL)
- {
- Warn(0.0, "Only one atmosphere allowed (last one will be used).");
- Destroy_Atmosphere(Frame.Atmosphere);
- }
- Frame.Atmosphere = Local_Atmosphere;
- END_CASE
-
- CASE (BACKGROUND_TOKEN)
- Parse_Begin();
- Parse_Colour (Frame.Background_Colour);
- Parse_End();
- END_CASE
-
- CASE (CAMERA_TOKEN)
- Parse_Camera (&Frame.Camera);
- END_CASE
-
- CASE2 (DECLARE_TOKEN, INCLUDE_TOKEN)
- UNGET
- Parse_Directive ();
- UNGET
- END_CASE
-
- CASE (FLOAT_FUNCT_TOKEN)
- switch(Token.Function_Id)
- {
- case VERSION_TOKEN:
- UNGET
- Parse_Directive ();
- UNGET
- break;
-
- default:
- UNGET
- Parse_Error_Str ("object or directive");
- break;
- }
- END_CASE
-
- CASE (MAX_TRACE_LEVEL_TOKEN)
- Global_Setting_Warn();
- Max_Trace_Level = (int) Parse_Float ();
- END_CASE
-
- CASE (MAX_INTERSECTIONS)
- Global_Setting_Warn();
- Max_Intersections = (int)Parse_Float ();
- END_CASE
-
- CASE (DEFAULT_TOKEN)
- Parse_Default();
- END_CASE
-
- CASE (END_OF_FILE_TOKEN)
- EXIT
- END_CASE
-
- CASE (GLOBAL_SETTINGS_TOKEN)
- Parse_Global_Settings();
- END_CASE
-
- OTHERWISE
- UNGET
- Object = Parse_Object();
- if (Object == NULL)
- Parse_Error_Str ("object or directive");
- Post_Process (Object, NULL);
- Link_To_Frame (Object);
- END_CASE
- END_EXPECT
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- * Mar 1996 : Add line number info to warning message [AED]
- *
- ******************************************************************************/
-
- static void Global_Setting_Warn()
- {
- if (opts.Language_Version >= 3.0)
- {
- Warning(0.0, "%s:%d: warning: '%s' should be in 'global_settings{...}' statement.\n",
- Token.Filename, Token.Token_Line_No+1, Token.Token_String);
- }
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static void Parse_Global_Settings()
- {
- Parse_Begin();
- EXPECT
- CASE (IRID_WAVELENGTH_TOKEN)
- Parse_Colour (Frame.Irid_Wavelengths);
- END_CASE
-
- CASE (ASSUMED_GAMMA_TOKEN)
- {
- DBL AssumedGamma;
- AssumedGamma = Parse_Float ();
-
- if (fabs(AssumedGamma - opts.DisplayGamma) < 0.1)
- {
- opts.GammaFactor = 1.0;
- opts.Options &= ~GAMMA_CORRECT; /* turn off gamma correction */
- }
- else
- {
- opts.GammaFactor = AssumedGamma/opts.DisplayGamma;
- opts.Options |= GAMMA_CORRECT; /* turn on gamma correction */
- }
- }
- END_CASE
-
- CASE (MAX_TRACE_LEVEL_TOKEN)
- Max_Trace_Level = (int) Parse_Float ();
- END_CASE
-
- CASE (ADC_BAILOUT_TOKEN)
- ADC_Bailout = Parse_Float ();
- END_CASE
-
- CASE (NUMBER_OF_WAVES_TOKEN)
- Number_Of_Waves = (int) Parse_Float ();
- if(Number_Of_Waves <=0)
- {
- Warn(0.0, "Illegal Value: Number_Of_Waves = 0. Changed to 1.");
- Number_Of_Waves = 1;
- }
- END_CASE
-
- CASE (MAX_INTERSECTIONS)
- Max_Intersections = (int)Parse_Float ();
- END_CASE
-
- CASE (AMBIENT_LIGHT_TOKEN)
- Parse_Colour (Frame.Ambient_Light);
- END_CASE
-
- CASE (RADIOSITY_TOKEN)
- Parse_Begin();
- EXPECT
- CASE (BRIGHTNESS_TOKEN)
- if ((opts.Radiosity_Brightness = Parse_Float()) <= 0.0)
- {
- Error("Radiosity brightness must be a positive number.");
- }
- END_CASE
-
- CASE (COUNT_TOKEN)
- if (( opts.Radiosity_Count = (int)Parse_Float()) <= 0)
- {
- Error("Radiosity count must be a positive number.");
- }
- if ( opts.Radiosity_Count > 1600)
- {
- Error("Radiosity count can not be more than 1600.");
- opts.Radiosity_Count = 1600;
- }
- END_CASE
-
- CASE (DISTANCE_MAXIMUM_TOKEN)
- if (( opts.Radiosity_Dist_Max = Parse_Float()) < 0.0)
- {
- Error("Radiosity distance maximum must be a positive number.");
- }
- END_CASE
-
- CASE (ERROR_BOUND_TOKEN)
- if (( opts.Radiosity_Error_Bound = Parse_Float()) <= 0.0)
- {
- Error("Radiosity error bound must be a positive number.");
- }
- END_CASE
-
- CASE (GRAY_THRESHOLD_TOKEN)
- opts.Radiosity_Gray = Parse_Float();
- if (( opts.Radiosity_Gray < 0.0) || ( opts.Radiosity_Gray > 1.0))
- {
- Error("Radiosity gray threshold must be from 0.0 to 1.0.");
- }
- END_CASE
-
- CASE (LOW_ERROR_FACTOR_TOKEN)
- if (( opts.Radiosity_Low_Error_Factor = Parse_Float()) <= 0.0)
- {
- Error("Radiosity low error factor must be a positive number.");
- }
- END_CASE
-
- CASE (MINIMUM_REUSE_TOKEN)
- if (( opts.Radiosity_Min_Reuse = Parse_Float()) < 0.0)
- {
- Error("Radiosity min reuse can not be a negative number.");
- }
- END_CASE
-
- CASE (NEAREST_COUNT_TOKEN)
- opts.Radiosity_Nearest_Count = (int)Parse_Float();
- if (( opts.Radiosity_Nearest_Count < 1) ||
- ( opts.Radiosity_Nearest_Count > MAX_NEAREST_COUNT))
- {
- Error("Radiosity nearest count must be a value from 1 to %ld.", (long)MAX_NEAREST_COUNT);
- }
- END_CASE
-
- CASE (RECURSION_LIMIT_TOKEN)
- if (( opts.Radiosity_Recursion_Limit = (int)Parse_Float()) <= 0)
- {
- Error("Radiosity recursion limit must be a positive number.");
- }
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
- Parse_End();
- END_CASE
-
- CASE (HF_GRAY_16_TOKEN)
- if (Allow_Float(1.0)>EPSILON)
- {
- opts.Options |= HF_GRAY_16;
- opts.PaletteOption = GREY; /* Force gray scale preview */
- Output_File_Handle->file_type = HF_FTYPE;
- }
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
- Parse_End();
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- void Destroy_Frame()
- {
- FOG *Fog, *Next_Fog;
- RAINBOW *Rainbow, *Next_Rainbow;
-
- Destroy_Camera (Frame.Camera); Frame.Camera=NULL;
-
- /* Destroy fogs. [DB 12/94] */
-
- for (Fog = Frame.Fog; Fog != NULL;)
- {
- Next_Fog = Fog->Next;
-
- Destroy_Fog(Fog);
-
- Fog = Next_Fog;
- }
-
- Frame.Fog = NULL;
-
- /* Destroy rainbows. [DB 12/94] */
-
- for (Rainbow = Frame.Rainbow; Rainbow != NULL;)
- {
- Next_Rainbow = Rainbow->Next;
-
- Destroy_Rainbow(Rainbow);
-
- Rainbow = Next_Rainbow;
- }
-
- Frame.Rainbow = NULL;
-
- /* Destroy skysphere. [DB 12/94] */
-
- Destroy_Skysphere(Frame.Skysphere);
-
- Frame.Skysphere = NULL;
-
- /* Destroy atmosphere. [DB 1/95] */
-
- Destroy_Atmosphere(Frame.Atmosphere);
-
- Frame.Atmosphere = NULL;
-
- if (Frame.Objects != NULL) {
- Destroy_Object (Frame.Objects);
- Frame.Objects = NULL;
- Frame.Light_Sources = NULL;
- }
- }
-
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static void Parse_Camera (Camera_Ptr)
- CAMERA **Camera_Ptr;
- {
- int i;
- DBL Direction_Length = 1.0, Up_Length, Right_Length, Handedness;
- DBL k1, k2, k3;
- VECTOR Local_Vector;
- MATRIX Local_Matrix;
- TRANSFORM Local_Trans;
- CAMERA *New;
-
- Parse_Begin ();
-
- EXPECT
- CASE (CAMERA_ID_TOKEN)
- Destroy_Camera(*Camera_Ptr);
- *Camera_Ptr = Copy_Camera ((CAMERA *) Token.Constant_Data);
- EXIT
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- New = *Camera_Ptr;
-
- EXPECT
- /* Get camera type. [DB 7/94] */
-
- CASE (PERSPECTIVE_TOKEN)
- New->Type = PERSPECTIVE_CAMERA;
- END_CASE
-
- CASE (ORTHOGRAPHIC_TOKEN)
- New->Type = ORTHOGRAPHIC_CAMERA;
- /*
- * Resize right and up vector to get the same image
- * area as we get with the perspective camera.
- */
- VSub(Local_Vector, New->Look_At, New->Location);
- VLength(k1, Local_Vector);
- VLength(k2, New->Direction);
- if ((k1 > EPSILON) && (k2 > EPSILON))
- {
- VScaleEq(New->Right, k1 / k2);
- VScaleEq(New->Up, k1 / k2);
- }
- END_CASE
-
- CASE (FISHEYE_TOKEN)
- New->Type = FISHEYE_CAMERA;
- END_CASE
-
- CASE (ULTRA_WIDE_ANGLE_TOKEN)
- New->Type = ULTRA_WIDE_ANGLE_CAMERA;
- END_CASE
-
- CASE (OMNIMAX_TOKEN)
- New->Type = OMNIMAX_CAMERA;
- END_CASE
-
- CASE (PANORAMIC_TOKEN)
- New->Type = PANORAMIC_CAMERA;
- END_CASE
-
- CASE (CYLINDER_TOKEN)
- i = (int)Parse_Float();
- switch (i)
- {
- case 1: New->Type = CYL_1_CAMERA; break;
- case 2: New->Type = CYL_2_CAMERA; break;
- case 3: New->Type = CYL_3_CAMERA; break;
- case 4: New->Type = CYL_4_CAMERA; break;
- }
- END_CASE
-
- CASE (TEST_CAMERA_1_TOKEN)
- New->Type = TEST_CAMERA_1;
- END_CASE
-
- CASE (TEST_CAMERA_2_TOKEN)
- New->Type = TEST_CAMERA_2;
- END_CASE
-
- CASE (TEST_CAMERA_3_TOKEN)
- New->Type = TEST_CAMERA_3;
- END_CASE
-
- CASE (TEST_CAMERA_4_TOKEN)
- New->Type = TEST_CAMERA_4;
- END_CASE
-
- /* Read viewing angle. Scale direction vector if necessary. [DB 7/94] */
-
- CASE (ANGLE_TOKEN)
- New->Angle = Parse_Float();
-
- if (New->Angle < 0.0)
- {
- Error("Negative viewing angle.");
- }
-
- if (New->Type == PERSPECTIVE_CAMERA)
- {
- if (New->Angle >= 180.0)
- {
- Error("Viewing angle has to be smaller than 180 degrees.");
- }
-
- VNormalize(New->Direction, New->Direction);
-
- VLength (Right_Length, New->Right);
-
- Direction_Length = Right_Length / tan(New->Angle * M_PI / 360.0)/2.0;
-
- VScaleEq(New->Direction, Direction_Length);
- }
- END_CASE
-
-
- /* Read primary ray pertubation. [DB 7/94] */
-
- CASE (TNORMAL_TOKEN)
- Parse_Begin ();
- Parse_Tnormal(&(New->Tnormal));
- Parse_End ();
- END_CASE
-
- CASE (LOCATION_TOKEN)
- Parse_Vector(New->Location);
- END_CASE
-
- CASE (DIRECTION_TOKEN)
- Parse_Vector(New->Direction);
- END_CASE
-
- CASE (UP_TOKEN)
- Parse_Vector(New->Up);
- END_CASE
-
- CASE (RIGHT_TOKEN)
- Parse_Vector(New->Right);
- END_CASE
-
- CASE (SKY_TOKEN)
- Parse_Vector(New->Sky);
- END_CASE
-
- CASE (LOOK_AT_TOKEN)
- VLength (Direction_Length, New->Direction);
- VLength (Up_Length, New->Up);
- VLength (Right_Length, New->Right);
- VCross (Local_Vector, New->Up, New->Direction);
- VDot (Handedness, Local_Vector, New->Right);
-
- Parse_Vector (New->Direction);
- Assign_Vector(New->Look_At, New->Direction);
-
- VSub (New->Direction, New->Direction, New->Location);
-
- /* Check for zero length direction vector. */
-
- if (VSumSqr(New->Direction) < EPSILON)
- {
- Error("Camera location and look_at point must be different.\n");
- }
-
- VNormalize (New->Direction, New->Direction);
-
- /* Save Right vector */
-
- Assign_Vector (Local_Vector, New->Right);
-
- VCross (New->Right, New->Sky, New->Direction);
-
- /* Avoid DOMAIN error (from Terry Kanakis) */
-
- if((fabs(New->Right[X]) < EPSILON) &&
- (fabs(New->Right[Y]) < EPSILON) &&
- (fabs(New->Right[Z]) < EPSILON))
- {
- /* Restore Right vector*/
-
- Assign_Vector (New->Right, Local_Vector);
- }
-
- VNormalize (New->Right, New->Right);
- VCross (New->Up, New->Direction, New->Right);
- VScale (New->Direction, New->Direction, Direction_Length);
-
- if (Handedness > 0.0)
- VScaleEq (New->Right, Right_Length)
- else
- VScaleEq (New->Right, -Right_Length);
-
- VScaleEq(New->Up, Up_Length);
- END_CASE
-
- CASE (TRANSLATE_TOKEN)
- Parse_Vector (Local_Vector);
- Translate_Camera (New, Local_Vector);
- END_CASE
-
- CASE (ROTATE_TOKEN)
- Parse_Vector (Local_Vector);
- Rotate_Camera (New, Local_Vector);
- END_CASE
-
- CASE (SCALE_TOKEN)
- Parse_Scale_Vector (Local_Vector);
- Scale_Camera (New, Local_Vector);
- END_CASE
-
- CASE (TRANSFORM_TOKEN)
- GET(TRANSFORM_ID_TOKEN)
- Transform_Camera (New, (TRANSFORM *)Token.Constant_Data);
- END_CASE
-
- CASE (MATRIX_TOKEN)
- Parse_Matrix (Local_Matrix);
- Compute_Matrix_Transform(&Local_Trans, Local_Matrix);
- Transform_Camera (New, &Local_Trans);
- END_CASE
-
- /* Parse focal blur stuff. */
-
- CASE (BLUR_SAMPLES_TOKEN)
- New->Blur_Samples = Parse_Float();
- if (New->Blur_Samples <= 0)
- {
- Error("Illegal number of focal blur samples.\n");
- }
- END_CASE
-
- CASE (CONFIDENCE_TOKEN)
- k1 = Parse_Float();
- if ((k1 > 0.0) && (k1 < 1.0))
- {
- New->Confidence = k1;
- }
- else
- {
- Warn(0.0, "Illegal confidence value. Default is used.");
- }
- END_CASE
-
- CASE (VARIANCE_TOKEN)
- k1 = Parse_Float();
- if ((k1 >= 0.0) && (k1 <= 1.0))
- {
- New->Variance = k1;
- }
- else
- {
- Warn(0.0, "Illegal variance value. Default is used.");
- }
- END_CASE
-
- CASE (APERTURE_TOKEN)
- New->Aperture = Parse_Float();
- END_CASE
-
- CASE (FOCAL_POINT_TOKEN)
- Parse_Vector(Local_Vector);
- VSubEq(Local_Vector, New->Location);
- VLength (New->Focal_Distance, Local_Vector);
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
- Parse_End ();
-
- /* Make sure the focal distance hasn't been explicitly given */
- if ( New->Focal_Distance < 0.0 )
- New->Focal_Distance = Direction_Length;
- if ( New->Focal_Distance == 0.0 )
- New->Focal_Distance = 1.0;
-
- /* Print a warning message if vectors are not perpendicular. [DB 10/94] */
-
- VDot(k1, New->Right, New->Up);
- VDot(k2, New->Right, New->Direction);
- VDot(k3, New->Up, New->Direction);
-
- if ((fabs(k1) > EPSILON) || (fabs(k2) > EPSILON) || (fabs(k3) > EPSILON))
- {
- Warn(0.0, "Camera vectors are not perpendicular. "
- "Making look_at the last statement may help.");
- }
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- void Parse_Matrix(Matrix)
- MATRIX Matrix;
- {
- int i, j;
-
- EXPECT
- CASE (LEFT_ANGLE_TOKEN)
- Matrix[0][0] = Parse_Float();
- for (i = 0; i < 4; i++)
- {
- for (j = !i ? 1 : 0; j < 3; j++)
- {
- Parse_Comma();
-
- Matrix[i][j] = Parse_Float();
- }
-
- Matrix[i][3] = (i != 3 ? 0.0 : 1.0);
- }
- GET (RIGHT_ANGLE_TOKEN);
-
- /* Check to see that we aren't scaling any dimension by zero */
- for (i = 0; i < 3; i++)
- {
- if (fabs(Matrix[0][i]) < EPSILON && fabs(Matrix[1][i]) < EPSILON &&
- fabs(Matrix[2][i]) < EPSILON)
- {
- Warn(0.0,"Illegal matrix column: Scale by 0.0. Changed to 1.0.");
- Matrix[i][i] = 1.0;
- }
- }
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (LEFT_ANGLE_TOKEN);
- END_CASE
- END_EXPECT
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static
- TRANSFORM *Parse_Transform ()
- {
- MATRIX Local_Matrix;
- TRANSFORM *New, Local_Trans;
- VECTOR Local_Vector;
-
- Parse_Begin ();
- New = Create_Transform ();
-
- EXPECT
- CASE(TRANSFORM_ID_TOKEN)
- Compose_Transforms (New, (TRANSFORM *)Token.Constant_Data);
- EXIT
- END_CASE
-
- CASE (TRANSLATE_TOKEN)
- Parse_Vector (Local_Vector);
- Compute_Translation_Transform(&Local_Trans, Local_Vector);
- Compose_Transforms (New, &Local_Trans);
- END_CASE
-
- CASE (ROTATE_TOKEN)
- Parse_Vector (Local_Vector);
- Compute_Rotation_Transform(&Local_Trans, Local_Vector);
- Compose_Transforms (New, &Local_Trans);
- END_CASE
-
- CASE (SCALE_TOKEN)
- Parse_Scale_Vector (Local_Vector);
- Compute_Scaling_Transform(&Local_Trans, Local_Vector);
- Compose_Transforms (New, &Local_Trans);
- END_CASE
-
- CASE (MATRIX_TOKEN)
- Parse_Matrix(Local_Matrix);
- Compute_Matrix_Transform(&Local_Trans, Local_Matrix);
- Compose_Transforms (New, &Local_Trans);
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- Parse_End ();
- return (New);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- void Parse_Declare ()
- {
- VECTOR Local_Vector;
- COLOUR *Local_Colour;
- PIGMENT *Local_Pigment;
- TNORMAL *Local_Tnormal;
- FINISH *Local_Finish;
- HALO *Local_Halo = NULL;
- TEXTURE *Local_Texture, *Temp_Texture;
- TRANSFORM *Local_Trans;
- OBJECT *Local_Object;
- CAMERA *Local_Camera;
- char *Temp_Data;
- int Previous;
-
- struct Constant_Struct *Constant_Ptr = NULL;
-
- EXPECT
- CASE (IDENTIFIER_TOKEN)
- if (++Number_Of_Constants >= Max_Constants)
- {
- if (Max_Constants >= INT_MAX/2)
- {
- Error("Too many constants declared.\n");
- }
-
- Max_Constants *= 2;
-
- Constants = (struct Constant_Struct *)POV_REALLOC(Constants, (Max_Constants+1) * sizeof(struct Constant_Struct), "constants table");
- }
-
- Constant_Ptr = &(Constants[Number_Of_Constants]);
- Constant_Ptr->Constant_Type = IDENTIFIER_TOKEN;
- EXIT
- END_CASE
-
- CASE4 (TNORMAL_ID_TOKEN, FINISH_ID_TOKEN, TEXTURE_ID_TOKEN, OBJECT_ID_TOKEN)
- CASE4 (COLOUR_MAP_ID_TOKEN, TRANSFORM_ID_TOKEN, CAMERA_ID_TOKEN, PIGMENT_ID_TOKEN)
- CASE4 (SLOPE_MAP_ID_TOKEN,NORMAL_MAP_ID_TOKEN,TEXTURE_MAP_ID_TOKEN,COLOUR_ID_TOKEN)
- CASE3 (PIGMENT_MAP_ID_TOKEN, HALO_ID_TOKEN,STRING_ID_TOKEN)
- Constant_Ptr = &(Constants[Token.Constant_Index]);
- EXIT
- END_CASE
-
- CASE2 (VECTOR_FUNCT_TOKEN, FLOAT_FUNCT_TOKEN)
- switch(Token.Function_Id)
- {
- case VECTOR_ID_TOKEN:
- case FLOAT_ID_TOKEN:
- Constant_Ptr = &(Constants[Token.Constant_Index]);
- break;
-
- default:
- Parse_Error(IDENTIFIER_TOKEN);
- break;
- }
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error(IDENTIFIER_TOKEN);
- END_CASE
- END_EXPECT
-
- Previous = Token.Token_Id;
-
- GET (EQUALS_TOKEN);
-
- EXPECT
- CASE_COLOUR
- Local_Colour = Create_Colour();
- Ok_To_Declare = FALSE;
- Parse_Colour (*Local_Colour);
- Ok_To_Declare = TRUE;
- if (Test_Redefine(Previous,COLOUR_ID_TOKEN))
- Destroy_Colour((COLOUR *)Constant_Ptr->Constant_Data);
- Constant_Ptr->Constant_Data = (char *) Local_Colour;
- Constant_Ptr->Constant_Type = COLOUR_ID_TOKEN;
- EXIT
- END_CASE
-
- CASE_VECTOR
- Ok_To_Declare = FALSE;
- Have_Vector = FALSE;
- Parse_Vector_Float (Local_Vector);
- if (Have_Vector)
- {
- if (Test_Redefine(Previous,VECTOR_FUNCT_TOKEN))
- Destroy_Vector((VECTOR *)Constant_Ptr->Constant_Data);
- Constant_Ptr->Constant_Type = VECTOR_ID_TOKEN;
- Constant_Ptr->Constant_Data = (char *) Create_Vector();
- Assign_Vector(Constant_Ptr->Constant_Data,Local_Vector);
- }
- else
- {
- if (Test_Redefine(Previous,FLOAT_FUNCT_TOKEN))
- Destroy_Float((DBL *)Constant_Ptr->Constant_Data);
- Constant_Ptr->Constant_Type = FLOAT_ID_TOKEN;
- Constant_Ptr->Constant_Data = (char *) Create_Float();
- *((DBL *) Constant_Ptr->Constant_Data) = Local_Vector[X];
- }
- Ok_To_Declare = TRUE;
- EXIT
- END_CASE
-
- CASE (PIGMENT_TOKEN)
- Local_Pigment = Copy_Pigment((Default_Texture->Pigment));
- Parse_Begin ();
- Parse_Pigment (&Local_Pigment);
- Parse_End ();
- if (Test_Redefine(Previous,PIGMENT_ID_TOKEN))
- Destroy_Pigment((PIGMENT *)Constant_Ptr->Constant_Data);
- Constant_Ptr->Constant_Type = PIGMENT_ID_TOKEN;
- Constant_Ptr->Constant_Data = (char *)Local_Pigment;
- EXIT
- END_CASE
-
- CASE (TNORMAL_TOKEN)
- Local_Tnormal = Copy_Tnormal((Default_Texture->Tnormal));
- Parse_Begin ();
- Parse_Tnormal (&Local_Tnormal);
- Parse_End ();
- if (Test_Redefine(Previous,TNORMAL_ID_TOKEN))
- Destroy_Tnormal((TNORMAL *)Constant_Ptr->Constant_Data);
- Constant_Ptr->Constant_Type = TNORMAL_ID_TOKEN;
- Constant_Ptr->Constant_Data = (char *) Local_Tnormal;
- EXIT
- END_CASE
-
- CASE (FINISH_TOKEN)
- Local_Finish = Copy_Finish((Default_Texture->Finish));
- Parse_Finish (&Local_Finish);
- if (Test_Redefine(Previous,FINISH_ID_TOKEN))
- Destroy_Finish((FINISH *)Constant_Ptr->Constant_Data);
- Constant_Ptr->Constant_Type = FINISH_ID_TOKEN;
- Constant_Ptr->Constant_Data = (char *) Local_Finish;
- EXIT
- END_CASE
-
- CASE (HALO_TOKEN)
- Local_Halo = Copy_Halo((Default_Texture->Halo));
- Parse_Halo (&Local_Halo);
- if (Test_Redefine(Previous,HALO_ID_TOKEN))
- Destroy_Halo((HALO *)Constant_Ptr->Constant_Data);
- Constant_Ptr->Constant_Type = HALO_ID_TOKEN;
- Constant_Ptr->Constant_Data = (char *) Local_Halo;
- EXIT
- END_CASE
-
- CASE (CAMERA_TOKEN)
- Local_Camera = Copy_Camera(Default_Camera);
- Parse_Camera (&Local_Camera);
- if (Test_Redefine(Previous,CAMERA_ID_TOKEN))
- Destroy_Camera((CAMERA *)Constant_Ptr->Constant_Data);
- Constant_Ptr->Constant_Type = CAMERA_ID_TOKEN;
- Constant_Ptr->Constant_Data = (char *) Local_Camera;
- EXIT
- END_CASE
-
- CASE (TEXTURE_TOKEN)
- Parse_Begin ();
- Local_Texture = Parse_Texture ();
- Parse_End ();
- Temp_Texture=NULL;
- Link_Textures(&Temp_Texture, Local_Texture);
- Ok_To_Declare = FALSE;
- EXPECT
- CASE (TEXTURE_TOKEN)
- Parse_Begin ();
- Local_Texture = Parse_Texture ();
- Parse_End ();
- Link_Textures(&Temp_Texture, Local_Texture);
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- if (Test_Redefine(Previous,TEXTURE_ID_TOKEN))
- {
- Destroy_Textures((TEXTURE *)Constant_Ptr->Constant_Data);
- }
- Constant_Ptr->Constant_Type = TEXTURE_ID_TOKEN;
- Constant_Ptr->Constant_Data = (char *)Temp_Texture;
- Ok_To_Declare = TRUE;
- EXIT
- END_CASE
-
- CASE (COLOUR_MAP_TOKEN)
- Ok_To_Declare = FALSE;
- Temp_Data=(char *) Parse_Colour_Map ();
- if (Test_Redefine(Previous,COLOUR_MAP_ID_TOKEN))
- Destroy_Blend_Map((BLEND_MAP *)Constant_Ptr->Constant_Data);
- Constant_Ptr->Constant_Type = COLOUR_MAP_ID_TOKEN;
- Constant_Ptr->Constant_Data = Temp_Data;
- EXIT
- END_CASE
-
- CASE (PIGMENT_MAP_TOKEN)
- Temp_Data = (char *) Parse_Blend_Map (PIGMENT_TYPE,NO_PATTERN);
- if (Test_Redefine(Previous,PIGMENT_MAP_ID_TOKEN))
- Destroy_Blend_Map((BLEND_MAP *)Constant_Ptr->Constant_Data);
- Constant_Ptr->Constant_Type = PIGMENT_MAP_ID_TOKEN;
- Constant_Ptr->Constant_Data = Temp_Data;
- EXIT
- END_CASE
-
- CASE (SLOPE_MAP_TOKEN)
- Temp_Data = (char *) Parse_Blend_Map (SLOPE_TYPE,NO_PATTERN);
- Constant_Ptr->Constant_Type = SLOPE_MAP_ID_TOKEN;
- if (Test_Redefine(Previous,SLOPE_MAP_ID_TOKEN))
- Destroy_Blend_Map((BLEND_MAP *)Constant_Ptr->Constant_Data);
- Constant_Ptr->Constant_Data = Temp_Data;
- EXIT
- END_CASE
-
- CASE (TEXTURE_MAP_TOKEN)
- Temp_Data = (char *) Parse_Blend_Map (TEXTURE_TYPE,NO_PATTERN);
- Constant_Ptr->Constant_Type = TEXTURE_MAP_ID_TOKEN;
- if (Test_Redefine(Previous,TEXTURE_MAP_ID_TOKEN))
- Destroy_Blend_Map((BLEND_MAP *)Constant_Ptr->Constant_Data);
- Constant_Ptr->Constant_Data = Temp_Data;
- EXIT
- END_CASE
-
- CASE (NORMAL_MAP_TOKEN)
- Temp_Data= (char *) Parse_Blend_Map (NORMAL_TYPE,NO_PATTERN);
- Constant_Ptr->Constant_Type = NORMAL_MAP_ID_TOKEN;
- if (Test_Redefine(Previous,NORMAL_MAP_ID_TOKEN))
- Destroy_Blend_Map((BLEND_MAP *)Constant_Ptr->Constant_Data);
- Constant_Ptr->Constant_Data = Temp_Data;
- EXIT
- END_CASE
-
- CASE (RAINBOW_TOKEN)
- Temp_Data= (char *) Parse_Rainbow();
- Constant_Ptr->Constant_Type = RAINBOW_ID_TOKEN;
- if (Test_Redefine(Previous,RAINBOW_ID_TOKEN))
- Destroy_Rainbow((RAINBOW *)Constant_Ptr->Constant_Data);
- Constant_Ptr->Constant_Data = Temp_Data;
- EXIT
- END_CASE
-
- CASE (FOG_TOKEN)
- Temp_Data= (char *) Parse_Fog();
- if (Test_Redefine(Previous,FOG_ID_TOKEN))
- Destroy_Fog((FOG *)Constant_Ptr->Constant_Data);
- Constant_Ptr->Constant_Data = Temp_Data;
- Constant_Ptr->Constant_Type = FOG_ID_TOKEN;
- EXIT
- END_CASE
-
- CASE (ATMOSPHERE_TOKEN)
- Temp_Data= (char *) Parse_Atmosphere();
- if (Test_Redefine(Previous,ATMOSPHERE_ID_TOKEN))
- Destroy_Atmosphere((ATMOSPHERE *)Constant_Ptr->Constant_Data);
- Constant_Ptr->Constant_Data = Temp_Data;
- Constant_Ptr->Constant_Type = ATMOSPHERE_ID_TOKEN;
- EXIT
- END_CASE
-
- CASE (SKYSPHERE_TOKEN)
- Temp_Data= (char *) Parse_Skysphere();
- if (Test_Redefine(Previous,SKYSPHERE_ID_TOKEN))
- Destroy_Skysphere((SKYSPHERE *)Constant_Ptr->Constant_Data);
- Constant_Ptr->Constant_Data = Temp_Data;
- Constant_Ptr->Constant_Type = SKYSPHERE_ID_TOKEN;
- EXIT
- END_CASE
-
- CASE (TRANSFORM_TOKEN)
- Local_Trans = Parse_Transform ();
- if (Test_Redefine(Previous,TRANSFORM_ID_TOKEN))
- Destroy_Transform((TRANSFORM *)Constant_Ptr->Constant_Data);
- Constant_Ptr->Constant_Type = TRANSFORM_ID_TOKEN;
- Constant_Ptr->Constant_Data = (char *) Local_Trans;
- EXIT
- END_CASE
-
- CASE4 (STRING_LITERAL_TOKEN,CHR_TOKEN,SUBSTR_TOKEN,STR_TOKEN)
- CASE4 (CONCAT_TOKEN,STRUPR_TOKEN,STRLWR_TOKEN,STRING_ID_TOKEN)
- UNGET
- Temp_Data= Parse_String();
- if (Test_Redefine(Previous,STRING_ID_TOKEN))
- POV_FREE(Constant_Ptr->Constant_Data);
- Constant_Ptr->Constant_Type = STRING_ID_TOKEN;
- Constant_Ptr->Constant_Data = Temp_Data;
- EXIT
- END_CASE
-
- OTHERWISE
- UNGET
- Local_Object = Parse_Object ();
- if (Test_Redefine(Previous,OBJECT_ID_TOKEN))
- Destroy_Object((OBJECT *)Constant_Ptr->Constant_Data);
- Constant_Ptr->Constant_Type = OBJECT_ID_TOKEN;
- Constant_Ptr->Constant_Data = (char *) Local_Object;
- EXIT
- END_CASE
-
- END_EXPECT
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static void Link (New_Object, Field, Old_Object_List)
- OBJECT *New_Object, **Field, **Old_Object_List;
- {
- *Field = *Old_Object_List;
- *Old_Object_List = New_Object;
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- void Link_Textures (Old_Textures, New_Textures)
- TEXTURE **Old_Textures;
- TEXTURE *New_Textures;
- {
- TEXTURE *Layer;
-
- if (New_Textures == NULL)
- return;
-
- if ((*Old_Textures) != NULL)
- {
- if ((*Old_Textures)->Type != PLAIN_PATTERN)
- {
- Error("Cannot layer over a patterned texture.\n");
- }
- }
- for (Layer = New_Textures ;
- Layer->Next != NULL ;
- Layer = (TEXTURE *)Layer->Next)
- {}
-
- Layer->Next = (TPATTERN *)*Old_Textures;
- *Old_Textures = New_Textures;
-
- if ((New_Textures->Type != PLAIN_PATTERN) && (New_Textures->Next != NULL))
- {
- Error("Cannot layer a patterned texture over another.\n");
- }
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static
- char *Get_Token_String (Token_Id)
- TOKEN Token_Id;
- {
- register int i;
-
- for (i = 0 ; i < LAST_TOKEN ; i++)
- if (Reserved_Words[i].Token_Number == Token_Id)
- return (Reserved_Words[i].Token_Name);
- return ("");
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static int Test_Redefine(Previous,a)
- int Previous;
- int a;
- {
- char *old, *new;
-
- if (Previous == IDENTIFIER_TOKEN)
- return (FALSE);
- if (Previous != a)
- {old = Get_Token_String (Previous);
- new = Get_Token_String (a);
- Error ("Attempted to redefine %s as %s.", old, new);
- }
- return (TRUE);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- void Parse_Error (Token_Id)
- TOKEN Token_Id;
- {
- char *expected;
-
- expected = Get_Token_String (Token_Id);
- Parse_Error_Str(expected);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- void Parse_Error_Str (str)
- char *str;
- {
- Where_Error ();
- Error_Line("%s expected but", str);
- Found_Instead ();
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static void Found_Instead ()
- {
- char *found;
-
- Stage=STAGE_FOUND_INSTEAD;
-
- switch(Token.Token_Id)
- {
- case IDENTIFIER_TOKEN:
- Error (" undeclared identifier '%s' found instead.\n", Token.Token_String);
- break;
-
- case VECTOR_FUNCT_TOKEN:
- found = Get_Token_String (Token.Function_Id);
- Error (" vector function '%s' found instead.\n", found);
- break;
-
- case FLOAT_FUNCT_TOKEN:
- found = Get_Token_String (Token.Function_Id);
- Error (" float function '%s' found instead.\n", found);
- break;
-
- case COLOUR_KEY_TOKEN:
- found = Get_Token_String (Token.Function_Id);
- Error (" color keyword '%s' found instead.\n", found);
- break;
-
- default:
- found = Get_Token_String (Token.Token_Id);
- Error (" %s found instead.\n", found);
- }
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- void Warn_State (Token_Id,Type)
- TOKEN Token_Id, Type;
- {
- char *found;
- char *should;
-
- found = Get_Token_String (Token_Id);
- should = Get_Token_String (Type);
- Warning (1.5, "%s:%d: warning: Found %s that should be in %s statement.\n",
- Token.Filename, Token.Token_Line_No+1, found, should);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- void Warn (Level, str)
- DBL Level;
- char *str;
- {
- if (opts.Language_Version < Level)
- return;
-
- Warning(Level, "%s:%d: warning: %s\n", Token.Filename, Token.Token_Line_No+1, str);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- void MAError (str,size)
- char *str;
- long size;
- {
- Error ("Out of memory. Cannot allocate %ld bytes for %s.\n",size,str);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- /* Write a token out to the token file */
-
- void Write_Token (Token_Id, Data_File)
- TOKEN Token_Id;
- DATA_FILE *Data_File;
-
- {
- Token.Token_Line_No = Data_File->Line_Number;
- Token.Filename = Data_File->Filename;
- Token.Token_String = String;
- Token.Constant_Data = NULL;
- Token.Token_Id = Token_Id;
-
- Token.Constant_Index = (int) Token.Token_Id - (int) LAST_TOKEN;
-
- if (Token.Constant_Index >= 0)
- {
- if (Token.Constant_Index <= Number_Of_Constants)
- {
- Token.Constant_Data = Constants[Token.Constant_Index].Constant_Data;
- Token.Token_Id=Constants[Token.Constant_Index].Constant_Type;
- }
- else
- {
- Token.Token_Id = IDENTIFIER_TOKEN;
- }
- }
-
- Token.Function_Id = Token.Token_Id;
- if (Token.Token_Id < FLOAT_FUNCT_TOKEN)
- Token.Token_Id = FLOAT_FUNCT_TOKEN;
- else
- if (Token.Token_Id < VECTOR_FUNCT_TOKEN)
- Token.Token_Id = VECTOR_FUNCT_TOKEN;
- else
- if (Token.Token_Id < COLOUR_KEY_TOKEN)
- Token.Token_Id = COLOUR_KEY_TOKEN;
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static void Post_Process (Object,Parent)
- OBJECT *Object, *Parent;
- {
- DBL Volume;
- OBJECT *Sib;
-
- if (Object == NULL)
- return;
-
- if (Parent != NULL)
- {
- if (Object->Texture == NULL)
- Object->Texture = Copy_Texture_Pointer (Parent->Texture);
-
- /*
- else
- if (Parent->Texture != NULL)
- {
- Local_Texture = Copy_Textures (Parent->Texture);
- Link_Textures (&(Object->Texture), Local_Texture);
- }
- */ /* Removed for backward compat with 1.0. May put back in. CEY 12/92 */
-
- if (Test_Flag(Parent, NO_SHADOW_FLAG))
- Set_Flag(Object, NO_SHADOW_FLAG);
- }
-
- if ((Object->Texture == NULL) &&
- !(Object->Type & TEXTURED_OBJECT) &&
- !(Object->Type & LIGHT_SOURCE_OBJECT))
- Object->Texture = Copy_Textures(Default_Texture);
-
- if (Object->Type & COMPOUND_OBJECT)
- {
- if (Object->Type & LIGHT_SOURCE_OBJECT)
- {
- ((LIGHT_SOURCE *)Object)->Next_Light_Source = Frame.Light_Sources;
- Frame.Light_Sources = (LIGHT_SOURCE *)Object;
- Frame.Number_Of_Light_Sources++;
- }
-
- for (Sib = ((CSG *)Object)->Children; Sib != NULL; Sib = Sib->Sibling)
- Post_Process(Sib, Object);
- }
- else
- {
- if (Object->Texture == NULL)
- Object->Texture = Copy_Textures(Default_Texture);
-
- if (Object->Texture->Type == PLAIN_PATTERN)
- if (Object->Texture->Tnormal != NULL)
- Object->Type |= DOUBLE_ILLUMINATE;
- }
-
- Post_Textures (Object->Texture);
-
- /* Test wether the object is finite or infinite. [DB 9/94] */
-
- BOUNDS_VOLUME(Volume, Object->BBox);
-
- if (Volume > INFINITE_VOLUME)
- {
- Set_Flag(Object, INFINITE_FLAG);
- }
-
- /* Test wether the object is opaque or not. [DB 8/94] */
-
- /*
- * Blobs and meshes have to be handled speratly because
- * of the multiple textures.
- */
-
- if ((Object->Methods != &Blob_Methods) &&
- (Object->Methods != &Mesh_Methods) &&
- (Test_Opacity(Object->Texture)))
- {
- Set_Flag(Object, OPAQUE_FLAG);
- }
-
- if (Object->Methods == &Blob_Methods)
- {
- Test_Blob_Opacity((BLOB *)Object);
- }
-
- if (Object->Methods == &Mesh_Methods)
- {
- Test_Mesh_Opacity((MESH *)Object);
- }
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- static void Destroy_Constants ()
- {
- int i;
- char *Ptr;
-
- for (i=1; i <= Number_Of_Constants; i++)
- {
- Ptr = Constants[i].Constant_Data;
- switch (Constants[i].Constant_Type)
- {
- case COLOUR_ID_TOKEN:
- Destroy_Colour((COLOUR *)Ptr);
- break;
- case VECTOR_ID_TOKEN:
- Destroy_Vector((VECTOR *)Ptr);
- break;
- case FLOAT_ID_TOKEN:
- Destroy_Float((DBL *)Ptr);
- break;
- case PIGMENT_ID_TOKEN:
- Destroy_Pigment((PIGMENT *)Ptr);
- break;
- case TNORMAL_ID_TOKEN:
- Destroy_Tnormal((TNORMAL *)Ptr);
- break;
- case FINISH_ID_TOKEN:
- Destroy_Finish((FINISH *)Ptr);
- break;
- case HALO_ID_TOKEN:
- Destroy_Halo((HALO *)Ptr);
- break;
- case TEXTURE_ID_TOKEN:
- Destroy_Textures((TEXTURE *)Ptr);
- break;
- case OBJECT_ID_TOKEN:
- Destroy_Object((OBJECT *)Ptr);
- break;
- case COLOUR_MAP_ID_TOKEN:
- case PIGMENT_MAP_ID_TOKEN:
- case SLOPE_MAP_ID_TOKEN:
- case TEXTURE_MAP_ID_TOKEN:
- case NORMAL_MAP_ID_TOKEN:
- Destroy_Blend_Map((BLEND_MAP *)Ptr);
- break;
- case TRANSFORM_ID_TOKEN:
- Destroy_Transform((TRANSFORM *)Ptr);
- break;
- case CAMERA_ID_TOKEN:
- Destroy_Camera((CAMERA *)Ptr);
- break;
- case RAINBOW_ID_TOKEN:
- Destroy_Rainbow((RAINBOW *)Ptr);
- break;
- case FOG_ID_TOKEN:
- Destroy_Fog((FOG *)Ptr);
- break;
- case SKYSPHERE_ID_TOKEN:
- Destroy_Skysphere((SKYSPHERE *)Ptr);
- break;
- case ATMOSPHERE_ID_TOKEN:
- Destroy_Atmosphere((ATMOSPHERE *)Ptr);
- break;
- case STRING_ID_TOKEN:
- POV_FREE(Ptr);
- break;
- }
- }
-
- POV_FREE(Constants);
- }
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * Link_To_Frame
- *
- * INPUT
- *
- * Object - Pointer to object
- *
- * OUTPUT
- *
- * Object
- *
- * RETURNS
- *
- * AUTHOR
- *
- * POV-Ray Team
- *
- * DESCRIPTION
- *
- * -
- *
- * CHANGES
- *
- * Sep 1994 : Added optional splitting of bounded unions if children are
- * finite. Added removing of unnecessary bounding. [DB]
- *
- ******************************************************************************/
-
- static void Link_To_Frame(Object)
- OBJECT *Object;
- {
- int finite;
- DBL Volume;
- OBJECT *This_Sib, *Next_Sib;
-
- if (Object == NULL) /* patches a memory addressing error jdm mar/95 */
- return;
-
- /* Remove bounding object if object is cheap to intersect. [DB 8/94] */
-
- if ((opts.Options & REMOVE_BOUNDS) && (Object->Bound != NULL))
- {
- if ((Object->Methods != &CSG_Union_Methods) &&
- (Object->Methods != &CSG_Intersection_Methods) &&
- (Object->Methods != &CSG_Merge_Methods) &&
- (Object->Methods != &Poly_Methods) &&
- (Object->Methods != &TTF_Methods))
- {
- /* Destroy only, if bounding object is not used as clipping object. */
-
- if (Object->Bound != Object->Clip)
- {
- Destroy_Object(Object->Bound);
- }
-
- Object->Bound = NULL;
-
- Warn(0.0, "Unnecessary bounding object removed.");
- }
- }
-
- /*
- * Link the object to the frame if it's not a CSG union object,
- * if it's clipped or if bounding slabs aren't used.
- */
-
- if ((Object->Methods != &CSG_Union_Methods) ||
- (Object->Clip != NULL) ||
- (!opts.Use_Slabs))
- {
- Link(Object, &(Object->Sibling), &(Frame.Objects));
-
- return;
- }
-
- /*
- * [DB 8/94]
- *
- * The object is a CSG union object. It will be split if all siblings are
- * finite, i.e. the volume of the bounding box doesn't exceed a threshold.
- */
-
- if (Object->Bound != NULL)
- {
- /* Test if all siblings are finite. */
-
- finite = TRUE;
-
- for (This_Sib = ((CSG *)Object)->Children; This_Sib != NULL; This_Sib = This_Sib->Sibling)
- {
- BOUNDS_VOLUME(Volume, This_Sib->BBox);
-
- if (Volume > BOUND_HUGE)
- {
- finite = FALSE;
-
- break;
- }
- }
-
- /*
- * If the union has infinite children or splitting is not used link
- * the union to the frame.
- */
-
- if ((!finite) || !(opts.Options & SPLIT_UNION))
- {
- if (finite)
- {
- Warn(0.0, "CSG union unnecessarily bounded.");
- }
-
- Link(Object, &(Object->Sibling), &(Frame.Objects));
-
- return;
- }
-
- Warn(0.0, "Bounded CSG union split.");
- }
-
- /* Link all siblings of a union to the frame. */
-
- for (This_Sib = ((CSG *)Object)->Children; This_Sib != NULL; This_Sib = Next_Sib)
- {
- /* Link_To_Frame() changes Sibling so save it */
-
- Next_Sib = This_Sib->Sibling;
-
- /* Sibling is no longer inside a CSG object. */
-
- This_Sib->Type &= ~IS_CHILD_OBJECT;
-
- Link_To_Frame (This_Sib);
- }
-
- /*
- Object->Texture = NULL;
- */
-
- Object->Sibling = NULL;
-
- ((CSG *)Object)->Children = NULL;
-
- Destroy_Object (Object);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- void Only_In(s1,s2)
- char *s1, *s2;
- {
- Error("Keyword '%s' can only be used in a %s statement.",s1,s2);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * DESCRIPTION
- *
- * CHANGES
- *
- ******************************************************************************/
-
- void Not_With(s1,s2)
- char *s1, *s2;
- {
- Error("Keyword '%s' cannot be used %s.",s1,s2);
- }
-
-