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point.h
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2000-10-01
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/****************************************************************************
* point.h
*
* This module contains all defines, typedefs, and prototypes for POINT.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 POINT_H
#define POINT_H
#include "vlbuffer.h"
/*****************************************************************************
* Global preprocessor defines
******************************************************************************/
#define LIGHT_OBJECT (COMPOUND_OBJECT+PATCH_OBJECT+LIGHT_SOURCE_OBJECT)
/* Light source types. */
#define POINT_SOURCE 1
#define SPOT_SOURCE 2
#define FILL_LIGHT_SOURCE 3
#define CYLINDER_SOURCE 4
/*****************************************************************************
* Global typedefs
******************************************************************************/
typedef struct Light_Source_Struct LIGHT_SOURCE;
struct Light_Source_Struct
{
COMPOUND_FIELDS
COLOUR Colour;
VECTOR Direction, Center, Points_At, Axis1, Axis2;
DBL Coeff, Radius, Falloff;
DBL Fade_Distance, Fade_Power;
LIGHT_SOURCE *Next_Light_Source;
unsigned char Light_Type, Area_Light, Jitter, Track,Parallel;
/* NK phmap */
unsigned char Photon_Area_Light; /* these bytes could be compressed to a single flag byte */
/* NK ---- */
int Area_Size1, Area_Size2;
int Adaptive_Level;
int Media_Attenuation;
int Media_Interaction;
COLOUR **Light_Grid;
OBJECT *Shadow_Cached_Object,*Projected_Through_Object;
char In_Group[MAXLIGHTGROUPS];
/* NK phmap - for dispersion */
BLEND_MAP *blend_map;
/* NK ---- */
#ifdef CircularOrientAreaLightPatch
/* Orient area lights [ENB 9/97] */
unsigned char Orient;
/* Circular area lights [ENB 9/97] */
unsigned char Circular;
unsigned char CircularOrient; /*one of both on?*/
#endif
#ifdef GlowPatch
DBL Glow_Amt;
int Glow_Type;
#endif
/* Light buffers for the six general directions in space. [DB 9/94] */
PROJECT_TREE_NODE *Light_Buffer[6];
};
/*****************************************************************************
* Global variables
******************************************************************************/
/*****************************************************************************
* Global functions
******************************************************************************/
LIGHT_SOURCE *Create_Light_Source (void);
DBL Attenuate_Light (LIGHT_SOURCE *Light_Source, RAY *Light_Source_Ray, DBL Distance);
COLOUR **Create_Light_Grid (int Size1, int Size2);
#endif