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- /****************************************************************************
- * txttest.c
- *
- * This module implements "fill-in-the-blank" pre-programmed texture
- * functions for easy modification and testing. Create new textures here.
- *
- * from Persistence of Vision(tm) Ray Tracer
- * Copyright 1996 Persistence of Vision Team
- *---------------------------------------------------------------------------
- * NOTICE: This source code file is provided so that patterns 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.
- *
- *****************************************************************************/
-
- /*
- * Some texture ideas garnered from SIGGRAPH '85 Volume 19 Number 3,
- * "An Image Synthesizer" By Ken Perlin.
- *
- * Further Ideas Garnered from "The RenderMan Companion" (Addison Wesley)
- */
-
- #include "frame.h"
- #include "vector.h"
- #include "povproto.h"
- #include "texture.h"
- #include "povray.h" /* [DB 9/94] */
- #include "txttest.h" /* [DB 9/94] */
- #include "pattern.h" /* [CY 10/94] */
-
-
-
- /*****************************************************************************
- * Local preprocessor defines
- ******************************************************************************/
-
-
-
- /*****************************************************************************
- * Local typedefs
- ******************************************************************************/
-
-
-
- /*****************************************************************************
- * Local variables
- ******************************************************************************/
-
-
-
- /*****************************************************************************
- * Static functions
- ******************************************************************************/
-
-
-
- /*
- * Test new textures in the routines that follow.
- */
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * pattern1
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * POV-Ray Team
- *
- * DESCRIPTION
- *
- * The pattern routines take an x,y,z point on an object and a pointer to
- * the object's texture description and return the color at that point
- * Similar routines are granite, agate, marble. See txtcolor.c for examples.
- *
- * CHANGES
- *
- ******************************************************************************/
-
- DBL pattern1 (EPoint, TPat)
- VECTOR EPoint;
- TPATTERN *TPat;
- {
- DBL value;
- /* YOUR NAME HERE */
-
- TPat=TPat;
-
- value = Noise(EPoint);
-
- return(value);
-
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * pattern2
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * POV-Ray Team
- *
- * DESCRIPTION
- *
- * The pattern routines take an x,y,z point on an object and a pointer to
- * the object's texture description and return the color at that point
- * Similar routines are granite, agate, marble. See txtcolor.c for examples.
- *
- * CHANGES
- *
- ******************************************************************************/
-
- DBL pattern2 (EPoint, TPat)
- VECTOR EPoint;
- TPATTERN *TPat;
- {
- DBL value;
- /* YOUR NAME HERE */
- TPat=TPat;
-
- value = Noise(EPoint);
-
- return(value);
-
- }
-
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * pattern3
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * POV-Ray Team
- *
- * DESCRIPTION
- *
- * The pattern routines take an x,y,z point on an object and a pointer to
- * the object's texture description and return the color at that point
- * Similar routines are granite, agate, marble. See txtcolor.c for examples.
- *
- * CHANGES
- *
- ******************************************************************************/
-
- DBL pattern3 (EPoint, TPat)
- VECTOR EPoint;
- TPATTERN *TPat;
- {
- DBL value;
- /* YOUR NAME HERE */
- TPat=TPat;
-
- value = Noise(EPoint);
-
- return(value);
-
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * bumpy1
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * POV-Ray Team
- *
- * DESCRIPTION
- *
- * The bumpy routines take a point on an object, a pointer to the
- * object's texture description and the surface normal at that point and
- * return a peturb surface normal to create the illusion that the surface
- * has been displaced.
- *
- * Similar routines are ripples, dents, bumps. See txtbump.c for examples.
- *
- * CHANGES
- *
- ******************************************************************************/
-
- void bumpy1 (EPoint, Tnormal, normal)
- VECTOR EPoint;
- TNORMAL *Tnormal;
- VECTOR normal;
- {
- /* YOUR NAME HERE */
- EPoint=EPoint;
-
- Tnormal = Tnormal;
-
- Assign_Vector(normal, normal);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * bumpy2
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * POV-Ray Team
- *
- * DESCRIPTION
- *
- * The bumpy routines take a point on an object, a pointer to the
- * object's texture description and the surface normal at that point and
- * return a peturb surface normal to create the illusion that the surface
- * has been displaced.
- *
- * Similar routines are ripples, dents, bumps. See txtbump.c for examples.
- *
- * CHANGES
- *
- ******************************************************************************/
-
- void bumpy2 (EPoint, Tnormal, normal)
- VECTOR EPoint;
- TNORMAL *Tnormal;
- VECTOR normal;
- {
- /* YOUR NAME HERE */
- EPoint=EPoint;
-
- Tnormal = Tnormal;
-
- Assign_Vector(normal, normal);
- }
-
-
-
- /*****************************************************************************
- *
- * FUNCTION
- *
- * bumpy3
- *
- * INPUT
- *
- * OUTPUT
- *
- * RETURNS
- *
- * AUTHOR
- *
- * POV-Ray Team
- *
- * DESCRIPTION
- *
- * The bumpy routines take a point on an object, a pointer to the
- * object's texture description and the surface normal at that point and
- * return a peturb surface normal to create the illusion that the surface
- * has been displaced.
- *
- * Similar routines are ripples, dents, bumps. See txtbump.c for examples.
- *
- * CHANGES
- *
- ******************************************************************************/
-
- void bumpy3 (EPoint, Tnormal, normal)
- VECTOR EPoint;
- TNORMAL *Tnormal;
- VECTOR normal;
- {
- /* YOUR NAME HERE */
- EPoint=EPoint;
-
- Tnormal = Tnormal;
-
- Assign_Vector(normal, normal);
- }
-