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OS/2 Shareware BBS: Graphics
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povsrc31.zip
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lighting.h
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2000-04-12
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/****************************************************************************
* lighting.h
*
* This module contains all defines, typedefs, and prototypes for LIGHTING.C.
*
* from Persistence of Vision(tm) Ray Tracer
* Copyright 1996,1999 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 email to team-coord@povray.org or visit us on the web at
* http://www.povray.org. The latest version of POV-Ray may be found at this site.
*
* 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.
*
*****************************************************************************/
#ifndef LIGHTING_H
#define LIGHTING_H
#include "point.h"
/*****************************************************************************
* Global preprocessor defines
******************************************************************************/
/*DSW*/
/* How many subrays to trace for dispersive media */
#define DEFAULT_DISP_NELEMS 7
/*---*/
/*****************************************************************************
* Global typedefs
******************************************************************************/
/*
* List to store light colours during shadow testing
* to avoid repeated testing with layered textures.
*/
typedef struct Light_Tested_Struct LIGHT_TESTED;
struct Light_Tested_Struct
{
int Tested;
COLOUR Colour;
};
/*****************************************************************************
* Global variables
******************************************************************************/
/*****************************************************************************
* Global functions
******************************************************************************/
void Determine_Apparent_Colour (INTERSECTION *Ray_Intersection, COLOUR Colour, RAY *Ray, DBL Weight);
void Initialize_Lighting_Code (void);
void Reinitialize_Lighting_Code (int Number_Of_Entries, TEXTURE ***Textures, DBL **Weights);
void Deinitialize_Lighting_Code (void);
int Test_Shadow (LIGHT_SOURCE *Light, DBL *Depth, RAY *Light_Source_Ray, RAY *Eye_Ray, VECTOR P, COLOUR Colour);
#ifdef UseMediaAndLightCache
void ResizeMediaMallocCaches(long newSize);
void ResizeLightMallocCaches(long newSize);
#endif
#endif