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/****************************************************************************
* radiosit.h
*
* Include file for radiosit.cpp, Radiosity calculation routies.
*
* Implemented by and (c) 1994 Jim McElhiney, mcelhiney@acm.org or 71201,1326
* All standard POV distribution rights granted. All other rights reserved.
*
* from Persistence of Vision(tm) Ray Tracer version 3.6.
* Copyright 1991-2003 Persistence of Vision Team
* Copyright 2003-2004 Persistence of Vision Raytracer Pty. Ltd.
*---------------------------------------------------------------------------
* 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 developers. There are strict rules
* regarding how you are permitted to use this file. These rules are contained
* in the distribution and derivative versions licenses which should have been
* provided with this file.
*
* These licences may be found online, linked from the end-user license
* agreement that is located at http://www.povray.org/povlegal.html
*---------------------------------------------------------------------------
* 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.
*---------------------------------------------------------------------------
* $File: //depot/povray/3.6-release/source/radiosit.h $
* $Revision: #2 $
* $Change: 2939 $
* $DateTime: 2004/07/04 13:43:26 $
* $Author: root $
* $Log$
*****************************************************************************/
#ifndef RADIOSIT_H
#define RADIOSIT_H
BEGIN_POV_NAMESPACE
#define RADIOSITY_CACHE_EXTENSION ".rca"
/*****************************************************************************
* Global preprocessor defines
******************************************************************************/
/* #define RADDEBUG 1 */
#define MAX_NEAREST_COUNT 20
/*****************************************************************************
* Global typedefs
******************************************************************************/
typedef struct wt_avg_struct WT_AVG;
/* quickie structure used to gather weighted average during tree traversal */
struct wt_avg_struct
{
COLOUR Weights_Times_Illuminances; /* Aggregates during traversal */
DBL Weights; /* Aggregates during traversal */
int Weights_Count; /* Count of points used, aggregates during trav */
int Good_Count; /* Count of points used, aggregates during trav */
VECTOR P, N; /* Point and Normal: input to traverse */
DBL Current_Error_Bound; /* see Radiosity_Error_Bound */
COLOUR Weight_Times_Illuminance[MAX_NEAREST_COUNT];
DBL Weight[MAX_NEAREST_COUNT];
DBL Distance[MAX_NEAREST_COUNT];
int Close_Count;
};
typedef struct byte_xyz BYTE_XYZ;
struct byte_xyz {
unsigned char x, y, z;
};
/*****************************************************************************
* Global variables
******************************************************************************/
extern long ra_reuse_count;
extern long ra_gather_count;
extern OT_NODE *ot_root;
extern OStream *ot_fd;
extern COLOUR Radiosity_Gather_Total;
extern long Radiosity_Gather_Total_Count;
extern int Radiosity_Trace_Level;
extern const BYTE_XYZ rad_samples[];
/*****************************************************************************
* External variables
******************************************************************************/
extern int firstRadiosityPass;
/*****************************************************************************
* Global functions
******************************************************************************/
/* NK rad 22 Nov 1999 - added L_Normal */
int Compute_Ambient (VECTOR IPoint, VECTOR Raw_Normal, VECTOR LayNormal, COLOUR Ambient_Colour, DBL Weight);
bool Initialize_Radiosity_Code (void);
bool Deinitialize_Radiosity_Code (void);
END_POV_NAMESPACE
#endif
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