// vr.diderot
//
// volume rendering example in Diderot
//

input string dataFile;		// name of dataset
input real stepSz;		// size of steps

image<3> img = load (dataFile);

actor RayCast (int row, int col)
{
    vec<3>	dir = (real(row), real(col));
    vec<3>	pos = (0.0, 0.0);
    vec<3>	t = 0.0;

    update
    {
	pos = pos + t*dir;
    }

}

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    vec&lt;3&gt;	pos = (0.0, 0.0);
    vec&lt;3&gt;	t = 0.0;

    update
    {
	pos = pos + t*dir;
    }

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