/****************************************************************************
*                   lighting.h
*
*  This module contains all defines, typedefs, and prototypes for LIGHTING.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.
*
*****************************************************************************/


#ifndef LIGHTING_H
#define LIGHTING_H

#include "point.h"



/*****************************************************************************
* Global preprocessor defines
******************************************************************************/




/*****************************************************************************
* Global typedefs
******************************************************************************/




/*****************************************************************************
* Global variables
******************************************************************************/



/*****************************************************************************
* Global functions
******************************************************************************/

void Determine_Apparent_Colour PARAMS((INTERSECTION *Ray_Intersection, COLOUR Colour, RAY *Ray, DBL Weight));
void Initialize_Lighting_Code PARAMS((void));
void Reinitialize_Lighting_Code PARAMS((int Number_Of_Entries, TEXTURE ***Textures, DBL **Weights));
void Deinitialize_Lighting_Code PARAMS((void));
int Test_Shadow PARAMS((LIGHT_SOURCE *Light, DBL *Depth, RAY *Light_Source_Ray, RAY *Eye_Ray, VECTOR P, COLOUR Colour));



#endif