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Index › Programming Questions & Help › Programs › strange results from point.contains(x, y);

mark hill Senior Member Offline Posts: 316

strange results from point.contains(x, y); Aug 19th, 2008, 10:59am   Not strictly a processing problem, as far as I can tell, but can anyone account for the inaccuracies this snippet produces? point.contains() would seem to be the obvious culprit. Thanks, Quote: Polygon p1; void setup() {  size(400, 400);  p1 = new Polygon();  p1.addPoint(0, 0);  p1.addPoint(width, height);  p1.addPoint(0, height); } void draw() {  loadPixels();  for(int j=0; j<height; j++) {    for(int i=0; i<width; i++) {      if(p1.contains(i, j)) {        pixels[(j*width)+i] = color(0, 255, 0);      }      else {        pixels[(j*width)+i] = color(255, 0, 0);      }    }  }  updatePixels(); }

PhiLho  YaBB Moderator Offline Posts: 4190 Near Paris (France)	Re: strange results from point.contains(x, y); Reply #1 - Aug 19th, 2008, 2:44pm   Looks like a floating point rounding issue. Funnily, if you use size(399, 399), the frontier is smooth...