UT_BoundingSphere.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:        UT_BoundingSphere.h ( Utility Library, C++)
 *
 * COMMENTS:
 *              This class implements a bounding sphere (with unity scale).
 *              It's not very precise. It's mainly meant for a one time
 *              calculation of a bounding sphere. If you try combining bounding
 *              spheres, you get rather gross results compared to your initial
 *              points.
 */

#ifndef __UT_BoundingSphere__
#define __UT_BoundingSphere__

#include "UT_API.h"
#include "UT_Vector3.h"
#include "UT_Vector4.h"
#include "UT_Vector3Array.h"
#include "UT_BoundingBox.h"


class UT_API UT_BoundingSphere
{
public:
                         UT_BoundingSphere();
                        ~UT_BoundingSphere();

    bool                 isInside(const UT_Vector3R &pt) const;

    fpreal               getRadius() const      { return myRadius; }
    const UT_Vector3R   &getCenter() const      { return myCenter; }

    void                 initialize(bool requires_update = false);
    void                 computeBound();
    fpreal               computeRadius(const UT_Vector3R &center) const;

    void                 addPoint(const UT_Vector3R &pt);
    void                 addBox(const UT_BoundingBox &box);
    void                 addSphere(const UT_BoundingSphere &bsphere);

    void                 transform(const UT_Matrix4R &xform);

private:
    // NOTE: Currently, the default copy constructor and assignment operators
    //       are sufficient.
    UT_Vector3R          myCenter;
    fpreal               myRadius;
    fpreal               myRadiusSquared;
    UT_Vector3R          myMins[3];
    UT_Vector3R          myMaxs[3];
    bool                 myDoDynamic;
    UT_Vector3RArray     myPointArray;
};
#endif