/**
 * La espiral de teodoro de Cirene
 * by alba g corral. 
 * 
 * 
 * Created Ag. 2007
 */
int ancho = 485;
int alto = 485;
//
//int angulo = 45;
int maxtriangles = 100;  // numero de triangulos     // Width of entire wave

int posyini = alto /2;
int posxini = ancho/2;
int cateto_long= 20;

float xx1,yy1,xx2,yy2,xx3,yy3,angulo,trans;


void setup() {
  size(ancho,alto);
  frameRate(10);
  colorMode(RGB,255,255,255,100);
  smooth();
}

void draw() {

  background(255);
  cirene();
}

void cirene(){
  translate(posxini, posyini);
  //triangulo 1
  xx2 = 0;
  yy2 = 0;
   angulo = atan2(cateto_long,cateto_long);
  xx1 = cos(angulo)*sqrt(2)*cateto_long;
  yy1 = -sin(angulo)*sqrt(2)*cateto_long;
  xx3 =cateto_long;
  yy3 = 0;
  triangle(xx1, yy1, xx2, yy2, xx3, yy3);
  //cambiamos
  rotate(-angulo);
  //stroke(0,100);

  for(int i=2;i<maxtriangles;i++) {
  stroke(0);
  
  trans=random(100,255);

  if(random(100)>80) fill(255, random(150,255));
  else if(random(100)>50) 
    fill(random(150,255),random(100,150),0, trans);
  else fill(0,random(100,150),random(0,155), trans);
    xx1 = sqrt(i)*cateto_long;
    yy1 = -cateto_long;
    xx3 =sqrt(i)*cateto_long;
    yy3 = 0;
    triangle(xx1, yy1, xx2, yy2, xx3, yy3);
    //triangulo 3
    angulo = atan2(-yy1,xx1);
    rotate(-angulo);
  }

}
void keyPressed() {
  // save frame
  println("Saving frame... "+frameCount);
  if(key=='s') saveFrame("randcomp-###.png");
}