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/****************************************************************************
* fpmetric.h
*
* This module contains all defines, typedefs, and prototypes for fpmetric.cpp.
*
* This module was written by D.Skarda&T.Bily and modified by R.Suzuki.
* Ported to POV-Ray 3.5 by Thorsten Froehlich.
*
* 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/fpmetric.h $
* $Revision: #2 $
* $Change: 2939 $
* $DateTime: 2004/07/04 13:43:26 $
* $Author: root $
* $Log$
*****************************************************************************/
#ifndef FPMETRIC_H
#define FPMETRIC_H
BEGIN_POV_NAMESPACE
/*****************************************************************************
* Global preprocessor defines
******************************************************************************/
#define PARAMETRIC_OBJECT (PATCH_OBJECT)
/*****************************************************************************
* Global variables
******************************************************************************/
extern METHODS Parametric_Methods;
/*****************************************************************************
* Global typedefs
******************************************************************************/
typedef struct Parametric_Struct PARAMETRIC;
typedef struct PrecompParValues_Struct PRECOMP_PAR_DATA;
struct PrecompParValues_Struct
{
int use, depth;
char flags;
DBL *Low[3], *Hi[3]; /* X,Y,Z */
};
struct Parametric_Struct
{
OBJECT_FIELDS
FUNCTION_PTR Function[3];
DBL umin, umax, vmin, vmax;
DBL accuracy;
DBL max_gradient;
int Inverted;
int container_shape;
union
{
struct
{
VECTOR center;
DBL radius;
} sphere;
struct
{
VECTOR corner1;
VECTOR corner2;
} box;
} container;
// internal use only
PRECOMP_PAR_DATA *PData;
DBL last_u, last_v;
};
/*****************************************************************************
* Global functions
******************************************************************************/
PARAMETRIC *Create_Parametric (void);
void Destroy_Parametric (OBJECT *Object);
void *Copy_Parametric (OBJECT *Object);
void Compute_Parametric_BBox (PARAMETRIC *Param);
PRECOMP_PAR_DATA *Precompute_Parametric_Values(PARAMETRIC *Par, char flags, int depth);
PRECOMP_PAR_DATA *Copy_PrecompParVal (PRECOMP_PAR_DATA *PPV);
void Destroy_PrecompParVal (PRECOMP_PAR_DATA *PPV);
END_POV_NAMESPACE
#endif
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