TS/TS_Ellipsoid.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * Produced by:
 *      David Wong
 *      Side Effects
 *      477 Richmond Street West
 *      Toronto, Ontario
 *      Canada   M5V 3E7
 *      416-504-9876
 *
 * NAME:        TS_Ellipsoid (C++)
 *
 * COMMENTS:
 *
 */

#ifndef _TS_Ellipsoid_h_
#define _TS_Ellipsoid_h_

#include "TS_API.h"
#include "TS_Primitive.h"

class TS_API TS_MetaEllipsoid: public TS_MetaPrimitive {
  public:
                        TS_MetaEllipsoid();
                        TS_MetaEllipsoid(const TS_MetaEllipsoid *);

    float               density(const UT_Vector3 &p) const;
    UT_Interval         density(const UT_BoundingBox &p) const;
    float               grad(const UT_Vector3 &point, UT_Vector3 &grad) const;
    int                 setRay(const TS_Ray &ray);
    float               rayDensity(float t) const;
    UT_Interval         rayDensity(const UT_Interval &t) const;
    void                transform(const UT_Matrix4 &);

    // Get the matrix of this ellipsoid's quadric.
    void                getQuadricMatrix4(UT_Matrix4 &m) const;

    TS_MetaExpression   *duplicate() const;
    void                init();
    void                reset();
  private:
#ifdef LINUX
                        public:
                        ~TS_MetaEllipsoid();
                        private:
#else
                        ~TS_MetaEllipsoid();
#endif
    TS_Quadric          q;
    fpreal64            myT2, myT1, myT0;     // computed data for ray tracing
};

#endif

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