GB/GB_Parameterization.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:        Parameterization class for fitting (C++)
 *
 * COMMENTS:
 *
 */

#ifndef __GB_Parameterization_H__
#define __GB_Parameterization_H__

#include "GB_API.h"
#include <UT/UT_PtrMatrix.h>
#include <UT/UT_Vector.h>

class UT_Matrix;

enum GB_ParmType { 
        GB_PARM_UNIFORM = 0,
        GB_PARM_CHORD           = 1,
        GB_PARM_CENTRIPETAL     = 2,
        GB_PARM_APPROXARC       = 3
};

class GB_API GB_Parameterization {
public:
    // Parameterize the set of data points [0..n][0..Dimension-1]
    // with optional parameterizating only [0..n][0..endDim].
    int         equalSpace(const UT_Matrix &dataPts, int wrapped,
                           UT_Vector &param, int endDim=-1);
    int         chordLength(const UT_Matrix &dataPts, int wrapped,
                            UT_Vector &param, int endDim=-1);
    int         centripetal(const UT_Matrix &dataPts, int wrapped,
                            UT_Vector &param, int endDim=-1);
    int         approxArcLength(const UT_Matrix &dataPts, int wrapped,
                            UT_Vector &param, int endDim=-1);

    // Find the smallest parm greater than or equal to val 
    // within the index range [startIdx..endIdx].
    // The param has to be in non-decreasing order.
    // Return 1 if successful.
    int         findClosest(const UT_Vector &parm, fpreal val, int &idx,
                            int startIdx, int endIdx);
};

#endif

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