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/*******************************************************************************
* super.h
*
* This module contains all defines, typedefs, and prototypes for SUPEREL.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/super.h $
* $Revision: #1 $
* $Change: 6069 $
* $DateTime: 2013/11/06 11:59:40 $
* $Author: chrisc $
*******************************************************************************/
#ifndef SUPER_H
#define SUPER_H
namespace pov
{
/*****************************************************************************
* Global preprocessor definitions
******************************************************************************/
#define SUPERELLIPSOID_OBJECT (BASIC_OBJECT)
/*****************************************************************************
* Global typedefs
******************************************************************************/
class Superellipsoid : public ObjectBase
{
public:
VECTOR Power;
Superellipsoid();
virtual ~Superellipsoid();
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();
protected:
bool Intersect(const Ray& ray, IStack& Depth_Stack, TraceThreadData *Thread);
static bool intersect_box(const VECTOR P, const VECTOR D, DBL *dmin, DBL *dmax);
static DBL power(DBL x, DBL e);
static DBL evaluate_g(DBL x, DBL y, DBL e);
DBL evaluate_superellipsoid(const VECTOR P) const;
static int compdists(const void *in_a, const void *in_b);
int find_ray_plane_points(const VECTOR P, const VECTOR D, int cnt, DBL *dists, DBL mindist, DBL maxdist) const;
void solve_hit1(DBL v0, const VECTOR tP0, DBL v1, const VECTOR tP1, VECTOR P) const;
bool check_hit2(const VECTOR P, const VECTOR D, DBL t0, VECTOR P0, DBL v0, DBL t1, DBL *t, VECTOR Q) const;
bool insert_hit(const Ray& ray, DBL Depth, IStack& Depth_Stack, TraceThreadData *Thread);
};
}
#endif
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