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BouncingBall ball1;
BouncingBall ball2;
 
PVector      p1 = new PVector();
PVector      p2 = new PVector();
boolean      drag = false;
 
void setup()
{
  size(800,600);
 
  ball1 = new BouncingBall(100,100);
  ball2 = new BouncingBall(50,50);
 
  // svg bild soll zentriert sein
  shapeMode(CENTER);
  smooth();
}
 
void draw()
{
  // hintergrund loeschen
  //background(255);
  // ghosting
  fill(255,255,255,60);
  rect(0,0,width,height);
 
  if(drag)
  { // zeichne die abschussrichtungdraw the direction of shoot
    p1.set(ball1._pos.x,ball1._pos.y,0);
    line(p1.x,p1.y,p2.x,p2.y);
  }
 
  // zeichnedraw denthe ballballs
  ball1.draw();
  ball2.draw();
}
 
void mousePressed()
{
  drag = true;
  p1.set(ball1._pos.x,ball1._pos.y,0);
  p2.set(mouseX,mouseY,0);
}
 
void mouseDragged()
{
  p2.set(mouseX,mouseY,0);
}
 
void mouseReleased()
{
  drag = false;
 
  // shooting abschussdirection staerkecalculation. berechnen
  PVector dir = PVector.sub(p2,p1);
  // laengeshorten the length verkuerzen
  dir.mult(.09);
 
  //the der ball wird neu ausgerichtetball is given a new direction 
  ball1.set(p1,dir,.993);
  ball2.set(p1,dir,.95);
}