SIM/SIM_BVLeafIterator.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 Pritchard
 *      Side Effects Software Inc
 *      123 Front Street West, Suite 1401
 *      Toronto, Ontario
 *      Canada   M5J 2M2
 *      416-504-9876
 */

#ifndef __SIM_BVLeafIterator_h__
#define __SIM_BVLeafIterator_h__

#include "SIM_API.h"
#include <BV/BV_LeafIterator.h>
#include <UT/UT_DMatrix4.h>

class SIM_TriangulatedGeometry;

/// Iterator for leaves to be enclosed by bounding volume. This iterator
/// fills each leaf with a single primitive.
/// Iterator retrieves info about each leaf:
/// - a set of vertices forming a bounding volume for the leaf
/// - barycenter (centroid) of primitive
class SIM_API SIM_BVLeafIterator : public BV_LeafIterator
{
public:
    typedef BV_LeafIterator BaseClass;
    
    explicit SIM_BVLeafIterator(const SIM_TriangulatedGeometry *tgeo,
                                const UT_DMatrix4 &begxform,
                                const UT_DMatrix4 &endxform,
                                bool startPosOnly = false);
    explicit SIM_BVLeafIterator(const SIM_TriangulatedGeometry *tgeo,
                                const UT_DMatrix4 &endxform,
                                bool startPosOnly = false);
    virtual             ~SIM_BVLeafIterator();

protected:
    virtual void         advanceSubclass();
    virtual void         jumpSubclass(int leafId);
    virtual bool         atEndSubclass() const;
    virtual void         rewindSubclass();
    virtual int          getLeafIdSubclass() const;

    virtual UT_Vector3   calcBarycenterSubclass() const;

    virtual void         advanceVertexSubclass();
    virtual bool         atEndVertexSubclass() const;
    virtual void         rewindVertexSubclass();
    virtual UT_Vector4   getVertexSubclass() const;

    virtual void         setSkipDupVertsSubclass(bool flag);


private:
    const SIM_TriangulatedGeometry     *myTgeo;
    const UT_DMatrix4                   myBegxform, myEndxform;
    int                                 myPrim;
    int                                 myVertex;

    int                                *myDupArray;
    int                                 myDupId;
    bool                                myEndFlag, myStartPosOnly;
};

#endif

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