/**
Petals.pde
Dave Bollinger
http://www.davebollinger.com

right-click to generate next pattern
*/

int npetals;
float theta, dtheta;
float drag;
float skale, dskale;
float ctrx, ctry;

void setup() {
  size(400,400,JAVA2D);
  smooth();
  ctrx = width / 2f;  
  ctry = height / 2f;
  next();
}

void next() {
  npetals = (int)random(30,300);
  skale = random(50,100f);
  dskale = -skale / (float)(npetals);
  theta = 0f;
  dtheta = random(-1f, 1f);
  drag = random(-1f, 1f);
}

void draw() {
  background(255);
  fill(32,192,96);
  stroke(0,16);
  translate(ctrx, ctry);
  float a = (PI/2f) + drag;
  float s = skale;
  float t = theta;
  for (int i=0; i<npetals; i++) {
    pushMatrix();
    scale(s);
    rotate(t);
    triangle(-1,0, 1,0, 2*cos(a), 2*sin(a));
    popMatrix();
    s += dskale;
    if (s < 0.0001)
      s = 0.0001;
    t += dtheta;
    //a += drag;
  } 
}

void mousePressed() {
  if (mouseButton==RIGHT)
    next();
}