import processing.opengl.*;
Physics physics;
Particle p;
Line toMouse;
Point m;
int timer = 0;
void setup(){
  size(400, 400);
  physics = new Physics();
  p = physics.addParticle(100, 100);
  Particle temp0 = p;
  for(int i = 0; i < 100; i++){
    Particle temp1 = physics.addParticle(100+(i+1)*1, 100+(i+1)*1);
    Spring s = physics.addSpring(temp0, temp1);
    s.stiffness = 0.1;
    temp0 = temp1;
  }
  m = new Point(mouseX, mouseY);
  toMouse = new Line(p, m);
  smooth();
}


void draw(){
  background(255);
  physics.verlet();
  physics.springs();
  if(mousePressed){
    m.setPosition(mouseX, mouseY);
    toMouse.updateLine();
    p.addVelocity(toMouse.dx, toMouse.dy);
  }
  //physics.drawSprings();  
  //physics.drawParticles();
  for(int i = 0; i < physics.s.size(); i++){
    strokeWeight(10 * sin((PI / physics.s.size()) * i));
    Spring temp = (Spring)physics.s.get(i);
    line(temp.a.x, temp.a.y, temp.b.x, temp.b.y);
  }
}