/*
 * ARTS 102 - Aesthetics of the Algorithmic Image
 * Johannes Goerz (johannes.goerz@gmail.com)
 * 2005-12-04
 */
 
Tentacle[] t;
int maxtentacles, framecounter, life;
int[][] startpoints;
color[] tcolors;

void setup() {
  // general procesing parameters
  size(600,600);
  smooth();
  background(0);
  framerate(25);
  noStroke();

  // animation parameters
  maxtentacles = 8;
  life = 30;
  
  // setup starting positions;  
  startpoints = new int[4][2];
  startpoints[0][0] = 80;
  startpoints[0][1] = 80;
  startpoints[1][0] = width-80;
  startpoints[1][1] = height-80;
  startpoints[2][0] = 80;
  startpoints[2][1] = height-80;
  startpoints[3][0] = width-80;
  startpoints[3][1] = 80;

  // setup tentacle colors
  tcolors = new color[2];
  tcolors[0] = color(255,100);
  tcolors[1] = color(255,0,0,100);

  // create tentacles
  t = new Tentacle[maxtentacles];
  for(int i = 0; i < maxtentacles; i++) {
    createNewTentacle( i );
  }
}

void draw() {
  noStroke();
  // fade background every 2 frames
  if(framecounter%2==0) {
    fill(0,20);
    rect(0,0,width,height);
  }
  framecounter++;

  // move tentacles
  for(int i = 0; i < t.length; i++) {
    int x;
    if(i == 0) {
      Vector v = new Vector();
      v.init(width/2, height/2);
      t[i].move(v);      
    }
    else {
      t[i].move( t[0].position );
    }

  }
}

void createNewTentacle( int id ) {
  int _point = int(random(0,startpoints.length));
  if (_point > startpoints.length -1 ) {
      _point = startpoints.length - 1;
  }
  t[id] = new Tentacle(   startpoints[_point][0] + int( random(-20,20) ), startpoints[_point][1] + int( random(-20,20) ));
  if(id == 0) {
    t[id].initialize( id, tcolors[1], int(life + random(life)), true);
  }
  else {
    t[id].initialize( id, tcolors[0], int(life + random(life)), false);
  }
}

void mousePressed() { 
  noLoop();
} 

void mouseReleased() {
  loop();
}