import traer.physics.*;

ParticleSystem physics;
Particle[] particles;
Particle mouse;
Particle v;

void setup() {
  
  size(600,400);
  smooth();
  frameRate(100);
  ellipseMode(CENTER);
  
  physics = new ParticleSystem(0,0.05);
  
  particles = new Particle[200];
  particles[0] = physics.makeParticle( 1.0, width/2, height/2, 0 );
  particles[0].makeFixed(); 
  mouse = physics.makeParticle( 1.0, width/2, height/2, 0 );
   for ( int i = 1; i < particles.length; ++i ) {
    particles[i] = physics.makeParticle( 1.0, random(width), random(height), 0 );
   physics.makeSpring( particles[0],  particles[i], 0.4, 0.4, random(100) );
    //physics.makeAttraction( mouse,  particles[i], -1000, 10 ); 
  }
  
  
  
}

void draw() {
  background(255);
  float x = float(mouseX);
  float y = float(mouseY);
  mouse.moveTo(x,y,0);
 
  physics.tick();

  
  for ( int i = 1; i < physics.numberOfParticles(); ++i ) {
    fill(0);
    v = physics.getParticle( i );
    ellipse(v.position().x(), v.position().y(),20,20);
   physics.makeAttraction( mouse,  v, -1000, 10 ); 
     
  }
  
  
  
  
  
}