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/****************************************************************************
* triangle.h
*
* This module contains all defines, typedefs, and prototypes for TRIANGLE.CPP.
*
* 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/triangle.h $
* $Revision: #2 $
* $Change: 2939 $
* $DateTime: 2004/07/04 13:43:26 $
* $Author: root $
* $Log$
*****************************************************************************/
#ifndef TRIANGLE_H
#define TRIANGLE_H
BEGIN_POV_NAMESPACE
/*****************************************************************************
* Global preprocessor defines
******************************************************************************/
#define TRIANGLE_OBJECT (PATCH_OBJECT)
#define SMOOTH_TRIANGLE_OBJECT (PATCH_OBJECT)
/* NK 1998 double_illuminate - removed +DOUBLE_ILLUMINATE from smooth_triangle */
/*****************************************************************************
* Global typedefs
******************************************************************************/
typedef struct Triangle_Struct TRIANGLE;
typedef struct Smooth_Triangle_Struct SMOOTH_TRIANGLE;
typedef struct Smooth_Color_Triangle_Struct SMOOTH_COLOR_TRIANGLE; /* AP */
struct Triangle_Struct
{
OBJECT_FIELDS
VECTOR Normal_Vector;
DBL Distance;
unsigned int Dominant_Axis:2;
unsigned int vAxis:2; /* used only for smooth triangles */
VECTOR P1, P2, P3;
};
struct Smooth_Triangle_Struct
{
OBJECT_FIELDS
VECTOR Normal_Vector;
DBL Distance;
unsigned int Dominant_Axis:2;
unsigned int vAxis:2; /* used only for smooth triangles */
VECTOR P1, P2, P3;
VECTOR N1, N2, N3, Perp;
};
struct Smooth_Color_Triangle_Struct /* AP */
{
OBJECT_FIELDS
VECTOR Normal_Vector;
DBL Distance;
unsigned int Dominant_Axis:2;
unsigned int vAxis:2; /* used only for smooth triangles */
VECTOR P1, P2, P3;
VECTOR N1, N2, N3, Perp;
int magic;
COLOUR C1, C2, C3;
};
/*****************************************************************************
* Global variables
******************************************************************************/
extern METHODS Triangle_Methods;
extern METHODS Smooth_Triangle_Methods;
/*****************************************************************************
* Global functions
******************************************************************************/
TRIANGLE *Create_Triangle (void);
SMOOTH_TRIANGLE *Create_Smooth_Triangle (void);
int Compute_Triangle (TRIANGLE *Triangle, int Smooth);
void Compute_Triangle_BBox (TRIANGLE *Triangle);
/* AP */
DBL Calculate_Smooth_T(VECTOR IPoint, VECTOR P1, VECTOR P2, VECTOR P3);
END_POV_NAMESPACE
#endif
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