UT/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.
 *
 * Produced by:
 *      Ramin Kamal
 *      Side Effects Software Inc
 *      477 Richmond Street West
 *      Toronto, Ontario
 *      Canada   M5V 3E7
 *      416-504-9876
 *
 * 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"

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

    int                  isInside(const UT_Vector3 &pt) const;

    fpreal               getRadius() const      { return myRadius; }
    const UT_Vector3    &getCenter() const      { return myCenter; }

    void                 initialize(int requiresUpdate = 0);
    void                 computeBound();
    fpreal               computeRadius(const UT_Vector3 &center) const;

    void                 addPoint(const UT_Vector3 &pt);
    void                 addPoint(const UT_Vector4 &pt);
    void                 addPoint(const float *pt);
    
    void                 addSphere(const UT_BoundingSphere &bsphere);
    UT_BoundingSphere   &operator=(const UT_BoundingSphere &bsphere);
    void                 transform(const UT_Matrix4 &xform);

private:
    UT_Vector3           myCenter;
    fpreal               myRadius;
    fpreal               myRadiusSquared;
    UT_Vector3           myMins[3];
    UT_Vector3           myMaxs[3];
    int                  myDoDynamic;
    UT_Vector3Array      myPointArray;
};
#endif

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