This page tests the fix for bug 634 for Processing.js
If the canvas and image below are identical, the test has passed.
// Test by Andor Salga
import processing.opengl.*;
void setup(){
size(100,100,OPENGL);
translate(width/2, height/2,0);
stroke(0);
beginShape(TRIANGLES);
fill(256,0,0);
vertex(0,-20,0);
fill(0,256,0);
vertex(-30,20,0);
fill(0,0,256);
vertex(30,20,0);
endShape();
}