回転する三角形のスタンプ

/**
* rotating triangle stamp
*
* @author aa_debdeb
* @date 2016/03/08
*/

void setup(){
  size(640, 640);
  
  background(30);
  fill(0);
  stroke(255);
  strokeWeight(1);
}

void draw(){
  if(mousePressed){
    translate(mouseX, mouseY);
    rotate(frameCount * 0.1);
    float speed = sqrt(sq(mouseX - pmouseX) + sq(mouseY - pmouseY));
    scale(map(speed, 0, 50, 3, 1));
    triangle(0, 0, 30, 0, 20, 10);
  }
}