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HxRgbStretch.h

/*
 *  Copyright (c) 2000, University of Amsterdam, The Netherlands.
 *  All rights reserved.
 *
 *  Author(s):
 *  Dennis Koelma (koelma@wins.uva.nl)
 *
 */

#ifndef HxRgbStretch_h
#define HxRgbStretch_h

#include "HxTagList.h"
#include "HxClassName.h"
#include "HxColConvert.h"


template<class ValT, class ValDoubleT>
class HxRgbStretch
{
public:
                        HxRgbStretch(HxTagList& tags)
                            {
                                _lowVal = HxGetTag(tags, "lowVal", double(0));
                                _highVal = HxGetTag(tags, "highVal", double(255));
                                _interval = _highVal - _lowVal;
                            }

    int                 doIt(const ValT& pixV)
                            {
                                HxVec3Double v = (HxVec3Double) pixV;
                                int x = (int) (((v.x() - _lowVal) / _interval) * 255);
                                int y = (int) (((v.y() - _lowVal) / _interval) * 255);
                                int z = (int) (((v.z() - _lowVal) / _interval) * 255);
                                return (255 << 24) | (x << 16) | (y << 8) | z;
                            }

    int                 doItDouble(const ValDoubleT& pixV)
                            {
                                HxVec3Double v = (HxVec3Double) pixV;
                                int x = (int) (((v.x() - _lowVal) / _interval) * 255);
                                int y = (int) (((v.y() - _lowVal) / _interval) * 255);
                                int z = (int) (((v.z() - _lowVal) / _interval) * 255);
                                return (255 << 24) | (x << 16) | (y << 8) | z;
                            }

    static HxString     className()
                            { return HxString("Stretch"); }

private:
    double              _lowVal;
    double              _highVal;
    double              _interval;
};


#endif

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