exrsamples.h

#ifndef EXRSAMPLES_H
#define EXRSAMPLES_H

// These are helpers to split and merge samples.  This would be needed to implement
// EXR sample tidying.
//
// This code is from the OpenEXR library documentation, in "InterpretingDeepPixels.pdf".
void splitVolumeSample(
    float a, float c, // Opacity and color of original sample
    float zf, float zb, // Front and back of original sample
    float z, // Position of split
    float& af, float& cf, // Opacity and color of part closer than z
    float& ab, float& cb); // Opacity and color of part further away than z

void mergeOverlappingSamples(
    float a1, float c1, // Opacity and color of first sample
    float a2, float c2, // Opacity and color of second sample
    float &am, float &cm); // Opacity and color of merged sample

#endif

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