UT_LatinSampler.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_LatinSampler.h ( UT Library, C++)
 *
 * COMMENTS:    This class distributes samples in a 2D latin square
 *              pattern.
 */

#ifndef __UT_LatinSampler__
#define __UT_LatinSampler__

#include "UT_API.h"
#include "UT_NonCopyable.h"

// Generate latin hypercube samples
class UT_API UT_LatinSampler
{
public:

    void        init(int xsamples, int ysamples);
    
    template<typename R>
    void        fillSamples(float *s, float *t,
                            float sscale, float tscale,
                            R &rand,
                            bool permute = false);

private:
    int          myXSamples;
    int          myYSamples;
    int          mySamples;
};

// Generates samples in the unit circle by filling in concentric rings.
class UT_API UT_DiskSampler
{
public:
     UT_DiskSampler();
    ~UT_DiskSampler();
    UT_NON_COPYABLE(UT_DiskSampler)

    template<typename R>
    void        init(int total_samples, R &rand);
    
    template<typename R>
    void        fillSamples(float *s, float *t,
                            float sscale, float tscale,
                            R &rand);

private:
    int          mySamples;
    float       *myS;
};

#endif