/* OpenProcessing Tweak of *@*http://www.openprocessing.org/sketch/10475*@* */
/* !do not delete the line above, required for linking your tweak if you re-upload */
int elapsedFrames = 0;
ArrayList points = new ArrayList();
boolean drawing = false;

void setup() {
  smooth();
  size(1280, 400);

  background(0);
}

void draw() {
  if (drawing == true) {
    PVector pos = new PVector();
    pos.x = mouseX;
    pos.y = mouseY;

    PVector vel = new PVector();
    vel.x = (0);
    vel.y = (0);

    Point punt = new Point(pos, vel, 250);
    points.add(punt);
  } 

    
  for (int i = 0; i < points.size(); i++) {
    Point localPoint = (Point) points.get(i);
    if (localPoint.isDead == true) {
      points.remove(i);
    }
    localPoint.update();
    localPoint.draw();
  }
  
  elapsedFrames++;
}


void keyPressed() {
  if (key == ' ') {
    for (int i = 0; i < points.size(); i++) {
      Point localPoint = (Point) points.get(i);
      localPoint.isDead = true;
    }
    noStroke();
    fill(0);
    rect(0, 0, width, height);
  }
}

void mousePressed() {
  drawing = true;
}

void mouseReleased() {
  drawing = false;
}



class Point {

  PVector pos, vel, noiseVec;
  float noiseFloat, lifeTime, age;
  boolean isDead;

  public Point(PVector _pos, PVector _vel, float _lifeTime) {
    pos = _pos;
    vel = _vel;
    lifeTime = _lifeTime;
    age = 0;
    isDead = false;
    noiseVec = new PVector();
  }

  void update() {
    noiseFloat = noise(pos.x * 0.0025, pos.y * 0.0025, elapsedFrames * 0.0001) *10;
    noiseVec.x = cos(((noiseFloat - 0.3) * HALF_PI) * -20);
    noiseVec.y = sin(((noiseFloat - 0.3) * HALF_PI) * -20);

    vel.add(noiseVec);
    vel.div(5.5);
    pos.add(vel);
    pos.sub(noiseVec);

    
    if (1.0-(age/lifeTime) == 0) {
      isDead = true;
      points.remove(0);
      
    }

    if (pos.x < 0 || pos.x &rt; width || pos.y < 0 || pos.y &rt; height) {
      isDead = true;
    }
    
    age++;
  }

  void draw() {    
    //fill(255, 50, 255);
    noStroke();
    stroke (random (0, 100), random (0, 100), random (255, 0), 35 );
    smooth();
    ellipse(pos.x, pos.y, 1/(age), 1/(age));
    fill (random(0, 10));
    smooth();
 
    
    //saveFrame("seq-####.tga");
  }
};