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View of /branches/vis15/src/tests/new-tests/zslice2-clamp.diderot

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Revision 3764 - (download) (annotate)
Sun Apr 17 12:08:56 2016 UTC (3 years, 5 months ago) by jhr
File size: 823 byte(s)
updating test
// zslice2 
//
// a version of the zslice2 example with clamping the image
//
// process output with:
// unu reshape -i zslice2.txt -s 200 200 | unu 2op exists - 0.1 | unu quantize -b 8 -o zslice2.png

int dataSize = 11;
int imgSize = 200;
vec3 orig = [0.0, 0.0, 5.0];
vec3 cVec = [0.0, 1.0, 0.0];
vec3 rVec = [1.0, 0.0, 0.0];

image(3)[] img = clamp(image("data/zimg112.nrrd"));

field#2(3)[] F = img ⊛ bspln3;

strand RayCast (int row, int col)
{
    real rr = lerp(-0.5, real(dataSize)-0.5, -0.5, real(row), real(imgSize)-0.5);
    real cc = lerp(-0.5, real(dataSize)-0.5, -0.5, real(col), real(imgSize)-0.5);
    vec3 pos = orig + rr*rVec + cc*cVec;
    output real val = -∞; 

    update
    {
        val = F(pos);
        stabilize;
    }
}

grid (2) { RayCast(r, c) | r in 0..(imgSize-1), c in 0..(imgSize-1) }

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