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.
 *
 * NAME:        TS_Ellipsoid (C++)
 *
 * COMMENTS:
 *
 */

#ifndef _TS_Ellipsoid_h_
#define _TS_Ellipsoid_h_

#include "TS_API.h"
#include <UT/UT_Interval.h>
#include "TS_Primitive.h"

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

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

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

    TS_MetaExpression   *duplicate() const override;
    void                init() override;
    void                reset() override;
    /// Compute memory usage (includes all shared memory)
    /// NOTE: Must add in TS_MetaExpression::getMemoryUsage(false).
    int64               getMemoryUsage(bool inclusive) const override;

private:
    TS_Quadric          myQ;
    fpreal64            myT2, myT1, myT0;     // computed data for ray tracing
};

#endif