Home My Page Projects Code Snippets Project Openings diderot
Summary Activity Tracker Tasks SCM

SCM Repository

[diderot] View of /branches/vis12-cl/test/hlic/hlic-BUG1.diderot
ViewVC logotype

View of /branches/vis12-cl/test/hlic/hlic-BUG1.diderot

Parent Directory Parent Directory | Revision Log Revision Log


Revision 2402 - (download) (annotate)
Sat Jul 27 13:55:03 2013 UTC (6 years ago) by jhr
File size: 1750 byte(s)
  Create branch for adding OpenCL to vis12 branch.  Based on r2401 of the vis12 branch.
// this version hits the issue of a join node with zero predecessors
//
int imgSize = 200;
real h = 0.3;    // step size of integration
int stepNum = 2; // take this many steps both upstream and downstream

field#1(2)[2] V = image("tor2slice-evec.nrrd") ⊛ ctmr;
field#0(2)[] R = image("tor2slice-rand.nrrd") ⊛ tent;

strand LIC (int xi, int yi) {
    real xx = lerp(0.0, 79.0, -0.5, real(xi), real(imgSize)-0.5);
    real yy = lerp(0.0, 79.0, -0.5, real(yi), real(imgSize)-0.5);
    vec2 pos0 = [xx,yy];
    vec2 pos = pos0;
    vec2 step = [0.0,0.0];
    output vec3 out = [0.0,0.0,0.0];
    real sum = 0.0;
    int num = 0;
    int mon = 0;
    real dir = 1.0;

    update {
      step = 0.5*h*dir*V(pos);
      if (inside(pos + step, V)) {
        step = h*dir*V(pos + step);
        if (inside(pos + step, V)) {
          pos += step;
        }
      }
      if (num == stepNum) {
        if (dir > 0.0) {
          stabilize;
          // BUG: error in cvtMethod(Update, ...)
          //uncaught exception Fail [Fail: unimplemented]
          //  raised at common/phase-timer.sml:76.50-76.52
          //  raised at translate/translate.sml:363.110-363.112
          //  raised at translate/translate.sml:303.29-303.31
          //  raised at translate/translate.sml:303.29-303.31
          //  raised at translate/translate.sml:276.29-276.49
          //make: *** [hlic.o] Error 1
          num = 0;
          pos = pos0;
          dir = -1.0;
        } else {
          stabilize;
        }
      }
      sum += R(pos);
      num += 1;
      mon += 1;

      if (7 == mon) {
        stabilize;
      }
    }

    stabilize {
      out = [real(num),sum,dir];
    }
}

initially [ LIC(xi, yi) | yi in 0..(imgSize-1), xi in 0..(imgSize-1) ];

root@smlnj-gforge.cs.uchicago.edu
ViewVC Help
Powered by ViewVC 1.0.0