Has anybody encountered this error before:

Code:

java.lang.RuntimeException: nan triangle
  at processing.core.PGraphics3D.depth_sort_triangles_compare(PGraphics3D.java:1316)
  at processing.core.PGraphics3D.depth_sort_triangles_partition(PGraphics3D.java:1289)
  at processing.core.PGraphics3D.depth_sort_triangles_internal(PGraphics3D.java:1279)
  at processing.core.PGraphics3D.depth_sort_triangles(PGraphics3D.java:1272)
  at processing.core.PGraphics3D.flush(PGraphics3D.java:406)
  at processing.core.PGraphics3D.endDraw(PGraphics3D.java:384)
 

The pertinent part of the draw loop looks like this:

Code:

  background(0);
  hint(ENABLE_DEPTH_SORT);
  //println(obList.size() + " objects to draw.");
  for ( int i = 0; i < obList.size(); i++)
  {
    ImgObject ob = (ImgObject)obList.get(i);
    ob.update();
    ob.draw();
  }
  fill(255);
  sphere(10);
  cam.feed();
 

And the draw function of ImgObject looks like this (img is a PImage member variable, x, y, and z are float member variables):

Code:

    //println("Drawing object with ID " + ID);
    fill(255);
    noStroke();
    pushMatrix();
    translate(x, y, z);
    beginShape();
    texture(img);
    vertex(0, 0, 0, 0, 0);
    vertex(0, 0, img.height, 0, 1);
    vertex(img.width, 0, img.height, 1, 1);
    vertex(img.width, 0, 0, 1, 0);
    endShape();
    popMatrix();
 

I tried switching to OPENGL and wound up with a similar error, but a trace from the JOGL functions, of course. So I suspect it is not necessarily a bug in Processing, but merely some sort of mistake on my part.

Actually, I'm pretty sure it was the x, y, z values. In the update function for the object I do some math where there is a potential divide by zero, which would make for some tasty NaN bread.