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/*******************************************************************************
* poly.h
*
* This module contains all defines, typedefs, and prototypes for POLY.CPP.
*
* ---------------------------------------------------------------------------
* 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/poly.h $
* $Revision: #1 $
* $Change: 6069 $
* $DateTime: 2013/11/06 11:59:40 $
* $Author: chrisc $
*******************************************************************************/
#ifndef POLY_H
#define POLY_H
namespace pov
{
/*****************************************************************************
* Global preprocessor defines
******************************************************************************/
#define POLY_OBJECT (STURM_OK_OBJECT)
#define CUBIC_OBJECT (STURM_OK_OBJECT)
#define QUARTIC_OBJECT (STURM_OK_OBJECT)
/* Number of coefficients of a three variable polynomial of order x */
inline int term_counts(int x) { return ((x+1)*(x+2)*(x+3)/6); }
/*****************************************************************************
* Global typedefs
******************************************************************************/
class Poly : public ObjectBase
{
public:
int Order;
DBL *Coeffs;
Poly(int order);
virtual ~Poly();
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 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();
virtual bool Intersect_BBox(BBoxDirection, const BBOX_VECT&, const BBOX_VECT&, BBOX_VAL) const;
bool Set_Coeff(const unsigned int x,const unsigned int y, const unsigned int z, const DBL value);
protected:
static int intersect(const Ray &Ray, int Order, const DBL *Coeffs, int Sturm_Flag, DBL *Depths, TraceThreadData *Thread);
static void normal0(VECTOR Result, int Order, const DBL *Coeffs, const VECTOR IPoint);
static void normal1(VECTOR Result, int Order, const DBL *Coeffs, const VECTOR IPoint);
static DBL inside(const VECTOR IPoint, int Order, const DBL *Coeffs);
static int intersect_linear(const Ray &ray, const DBL *Coeffs, DBL *Depths);
static int intersect_quadratic(const Ray &ray, const DBL *Coeffs, DBL *Depths);
// static int factor_out(int n, int i, int *c, int *s);
//static int binomial(int n, int r);
//static void factor1(int n, int *c, int *s);
};
}
#endif
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