/* built with Studio Sketchpad: 
 *   https://sketchpad.cc
 * 
 * observe the evolution of this sketch: 
 *   https://studio.sketchpad.cc/sp/pad/view/ro.rgYtqqNibeO/rev.129
 * 
 * authors: 
 *   carla s

 * license (unless otherwise specified): 
 *   creative commons attribution-share alike 3.0 license.
 *   https://creativecommons.org/licenses/by-sa/3.0/ 
 */ 



// This sketch builds on a prior work, "Sunflower Pattern", created by Felix Woitzel
// http://studio.sketchpad.cc/sp/pad/view/ro.9yc$gOWRZwqvl/rev.3

// this as created when adding a triangle instead of the ellipse used.
 // I have been working with the triangle form and wanted to see what it would do. It is still not a trianlge but looks cool.




float theta = (1+sqrt(5))/2;
 
int num = 400;
float v = 0.05;
float s = 64.;
float w = 1.5;
 
void setup() {  // this is run once.   
  size(512, 512);
  frameRate(60);
 
  strokeWeight(w);
  stroke(256, 256, 256, 128);
}
 
 
void draw() {  // this is run repeatedly.  
 
  background(0);
  fill(256);
 
  for ( int d = 0; d < num; d++) {
    float l = (float)d/(float)(num-1);
    l = l + millis()/1000*v;
    l = l - floor(l);
    
    pushMatrix();
    translate(width/2, height/2);
    rotate(-d*theta*4);
    translate(l*l*width/2, 0);
 
    float e = l*s;
   triangle(0,0,e,e);    
    popMatrix();
  }
}