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- /****************************************************************************
- * objects.h
- *
- * This module contains all defines, typedefs, and prototypes for OBJECTS.C.
- *
- * 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.
- *
- *****************************************************************************/
-
- /* NOTE: FRAME.H contains other object stuff. */
-
- #ifndef OBJECTS_H
- #define OBJECTS_H
-
-
-
- /*****************************************************************************
- * Global preprocessor defines
- ******************************************************************************/
-
- /*
- * [DB 7/94]
- *
- * The flag field is used to store all possible flags that are
- * used for objects (up to 16).
- *
- * The flages are manipulated using the following macros:
- *
- * Set_Flag (Object, Flag) : set specified Flag in Object
- * Clear_Flag (Object, Flag) : clear specified Flag in Object
- * Invert_Flag (Object, Flag) : invert specified Flag in Object
- * Test_Flag (Object, Flag) : test specified Flag in Object
- *
- * Copy_Flag (Object1, Object2, Flag) : Set the Flag in Object1 to the
- * value of the Flag in Object2.
- * Bool_Flag (Object, Flag, Bool) : if(Bool) Set flag else Clear flag
- *
- * Object is a pointer to the object.
- * Flag is the number of the flag to test.
- *
- */
-
- #define NO_SHADOW_FLAG 0x0001 /* Object doesn't cast shadows */
- #define CLOSED_FLAG 0x0002 /* Object is closed */
- #define INVERTED_FLAG 0x0004 /* Object is inverted */
- #define SMOOTHED_FLAG 0x0008 /* Object is smoothed */
- #define CYLINDER_FLAG 0x0010 /* Object is a cylinder */
- #define DEGENERATE_FLAG 0x0020 /* Object is degenerate */
- #define STURM_FLAG 0x0040 /* Object should use sturmian root solver */
- #define OPAQUE_FLAG 0x0080 /* Object is opaque */
- #define MULTITEXTURE_FLAG 0x0100 /* Object is multi-textured */
- #define INFINITE_FLAG 0x0200 /* Object is infinite */
- #define HIERARCHY_FLAG 0x0400 /* Object can have a bounding hierarchy */
- #define HOLLOW_FLAG 0x0800 /* Object is hollow (atmosphere inside) */
- #define HOLLOW_SET_FLAG 0x1000 /* Hollow explicitly set in scene file */
-
- #define Set_Flag(Object, Flag) \
- { (Object)->Flags |= (Flag); }
-
- #define Clear_Flag(Object, Flag) \
- { (Object)->Flags &= ~(Flag); }
-
- #define Invert_Flag(Object, Flag) \
- { (Object)->Flags ^= (Flag); }
-
- #define Test_Flag(Object, Flag) \
- ((Object)->Flags & (Flag))
-
- #define Copy_Flag(Object1, Object2, Flag) \
- { (Object1)->Flags = (((Object1)->Flags) & (!Flag)) | \
- (((Object2)->Flags) & (Flag)); }
-
- #define Bool_Flag(Object1, Flag, Bool) \
- { if(Bool){ (Object)->Flags |= (Flag); } else { (Object)->Flags &= ~(Flag); }}
-
-
-
- /* Object types. */
-
- #define BASIC_OBJECT 0
- #define PATCH_OBJECT 1 /* Has no inside, no inverse */
- #define TEXTURED_OBJECT 2 /* Has texture, possibly in children */
- #define COMPOUND_OBJECT 4 /* Has children field */
- #define STURM_OK_OBJECT 8 /* STRUM legal */
- #define WATER_LEVEL_OK_OBJECT 16 /* WATER_LEVEL legal */
- #define LIGHT_SOURCE_OBJECT 32 /* link me in frame.light_sources */
- #define BOUNDING_OBJECT 64 /* This is a holder for bounded object */
- #define SMOOTH_OK_OBJECT 128 /* SMOOTH legal */
- #define IS_CHILD_OBJECT 256 /* Object is inside a COMPOUND */
- #define DOUBLE_ILLUMINATE 512 /* Illuminate both sides of surface to avoid normal purturb bug */
- #define HIERARCHY_OK_OBJECT 1024 /* NO_HIERARCHY legal */
-
- #define CHILDREN_FLAGS (PATCH_OBJECT+TEXTURED_OBJECT) /* Reverse inherited flags */
-
-
-
- /*****************************************************************************
- * Global typedefs
- ******************************************************************************/
-
-
-
- /*****************************************************************************
- * Global variables
- ******************************************************************************/
-
- extern unsigned int Number_of_istacks;
- extern unsigned int Max_Intersections;
- extern ISTACK *free_istack;
-
-
-
- /*****************************************************************************
- * Global functions
- ******************************************************************************/
-
- int Intersection PARAMS((INTERSECTION *Ray_Intersection, OBJECT *Object, RAY *Ray));
- int Ray_In_Bound PARAMS((RAY *Ray, OBJECT *Bounding_Object));
- int Point_In_Clip PARAMS((VECTOR IPoint, OBJECT *Clip));
- OBJECT *Copy_Object PARAMS((OBJECT *Old));
- void Translate_Object PARAMS((OBJECT *Object, VECTOR Vector, TRANSFORM *Trans));
- void Rotate_Object PARAMS((OBJECT *Object, VECTOR Vector, TRANSFORM *Trans));
- void Scale_Object PARAMS((OBJECT *Object, VECTOR Vector, TRANSFORM *Trans));
- void Transform_Object PARAMS((OBJECT *Object, TRANSFORM *Trans));
- int Inside_Object PARAMS((VECTOR IPoint, OBJECT *Vector));
- void Invert_Object PARAMS((OBJECT *Object));
- void Destroy_Object PARAMS((OBJECT *Object));
- ISTACK *open_istack PARAMS((void));
- void close_istack PARAMS((ISTACK *istk));
- void incstack PARAMS((ISTACK *istk));
- void Destroy_IStacks PARAMS((void));
-
-
-
- #endif
-