void wvMatrixForEachElt(WVmatrix *matrix, WVbinaryOpFunc op, WVdata op2);

wvMatrixForEachElt performs the binary operation op on each element of matrix.

WVbinaryOpFunc is a pointer to a function which has a prototype matching the following:

WVdata func(WVdata op1, WVdata op2);

The function will be passed an element of matrix as op1 and the op2 from the wvMatrixForEachElt call will be passed to the function as op2.

#include <wv/matrix.h>
  
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WVdata alphaMultiply(WVdata op1, WVdata op2)
{
    return op1 * op2;
}
  
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{
    WVindexVector *size;
    WVmatrix *mat;

    size = wvVaNewIndexVector(2, 256, 512);
    mat  = wvNewMatrix(size);

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    /* multiply mat by alpha=2 */
    wvMatrixForEachElt(mat, alphaMultiply, 2);
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    wvDestroyMatrix(mat);
    wvDestroyIndexVector(size);
}