triangle practice

genericTriangles.pde

/*
generic triangles by reuben thomas:
http://www.functor.co/post/30584901916/look-at-how-generic-these-generic-triangles-i
 which i will now copy as practice
 */

//horribly named variables
//side, height, color of border, angle for periodic function
float s, h, c, a;

void setup() {
  size(300, 300);
  frameRate(3);
  strokeWeight(5);
  a = 0;
  c = 0;
  s = 25;
  h = s*sqrt(3)/2;
  //noLoop();
}

void draw() {
  background(0);
  c = abs(sin(a)*255);
  stroke(c);
  for (float i = 0; i < height+h; i+=h) {
    float start = (i%(h*2) == 0) ? 0 : -s/2;
    for (float j = start; j < width+s; j+=s) {
      fill((random(50,255)+c)%255);
      triangle(j, i, j+s/2, i+h, j+s, i);
      fill((random(50,255)+c)%255);
      triangle(j, i, j-s/2, i+h, j+s/2, i+h);
    }
  }
  a = (a+0.1)%TWO_PI;
}