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View of /branches/charisee/test/vr-MIP.diderot

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Revision 149 - (download) (annotate)
Fri Jul 9 08:34:57 2010 UTC (9 years, 4 months ago) by glk
Original Path: trunk/test/vr-MIP.diderot
File size: 1246 byte(s)
better params
// vr-MIP.diderot
//
// maximum intensity projection in Diderot
//

input string dataFile;      // name of dataset
input real stepSz;          // size of steps
                            // e.g. 0.1
input vec3 eye;             // location of eye point
                            // e.g. (25,15,10)
input vec3 orig;            // location of pixel (0,0)
                            // e.g. (12.1373,4.78258,8.3972)
input vec3 cVec;            // vector between pixels horizontally
                            // e.g. (-0.0135258,0.0247972,0)
input vec3 rVec;            // vector between pixels vertically
                            // e.g. (0.00667124,0.00363886,-0.0272048)

image(3)[] img = load (dataFile);

//field#1(3)[] F = convolve (bspln3, img);
field#2(3)[] F = convolve (bspln3, img);

actor RayCast (int row, int col)
{
    vec3 pos = orig + real(row)*rVec + real(col)*cVec;
    vec3 dir = (pos - eye)/|pos - eye|;
    real t = 0.0;
    real maxval = -inf; 

    update
    {
        vec3 pt = pos + t*dir;
        real val = F@pt;
        maxval = max(val, maxval);
        if (t > 20)
            stabilize;
        t = t + stepSz;
    }

    /* render: output maxval */
}

initially [ RayCast(r, c) | r in 0..199, c in 0..199 ];

root@smlnj-gforge.cs.uchicago.edu
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