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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.
*
* ---------------------------------------------------------------------------
* Persistence of Vision Ray Tracer ('POV-Ray') version 3.7.
* Copyright 1991-2013 Persistence of Vision Raytracer Pty. Ltd.
*
* POV-Ray is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* POV-Ray is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
* ---------------------------------------------------------------------------
* POV-Ray 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/public/povray/3.x/source/backend/shape/fpmetric.h $
* $Revision: #1 $
* $Change: 6069 $
* $DateTime: 2013/11/06 11:59:40 $
* $Author: chrisc $
*******************************************************************************/
#ifndef FPMETRIC_H
#define FPMETRIC_H
#include "backend/parser/parse.h"
namespace pov
{
/*****************************************************************************
* Global preprocessor defines
******************************************************************************/
#define PARAMETRIC_OBJECT (PATCH_OBJECT)
/*****************************************************************************
* Global typedefs
******************************************************************************/
typedef struct PrecompParValues_Struct PRECOMP_PAR_DATA;
struct PrecompParValues_Struct
{
int use, depth;
char flags;
DBL *Low[3], *Hi[3]; /* X,Y,Z */
};
class Parametric : public ObjectBase
{
public:
FunctionVM *vm;
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;
Parametric();
virtual ~Parametric();
virtual ObjectPtr Copy();
virtual bool All_Intersections(const Ray&, IStack&, TraceThreadData *);
virtual bool Inside(const VECTOR, TraceThreadData *) const;
virtual void Normal(VECTOR, Intersection *, TraceThreadData *) const;
virtual void UVCoord(UV_VECT, const Intersection *, TraceThreadData *) const;
virtual void Translate(const VECTOR, const TRANSFORM *);
virtual void Rotate(const VECTOR, const TRANSFORM *);
virtual void Scale(const VECTOR, const TRANSFORM *);
virtual void Transform(const TRANSFORM *);
virtual void Invert();
virtual void Compute_BBox();
void Precompute_Parametric_Values(char flags, int depth, FPUContext *ctx);
protected:
void Precomp_Par_Int(int depth, DBL umin, DBL vmin, DBL umax, DBL vmax, FPUContext *ctx);
PRECOMP_PAR_DATA *Copy_PrecompParVal();
void Destroy_PrecompParVal();
static inline DBL Evaluate_Function_UV(FPUContext *ctx, FUNCTION funct, const UV_VECT fnvec);
static inline void Evaluate_Function_Interval_UV(FPUContext *ctx, FUNCTION funct, DBL threshold, const UV_VECT fnvec_low, const UV_VECT fnvec_hi, DBL max_gradient, DBL& low, DBL& hi);
static void Interval(DBL dx, DBL a, DBL b, DBL max_gradient, DBL *Min, DBL *Max);
private:
PRECOMP_PAR_DATA *PData;
int PrecompLastDepth;
};
}
#endif
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