Hi folks,
I am playing around with traer.physics building a double pendulum. I've started with the pendulum example from the traer.physics website, but I am already lost...

I like to switch off the spring (the boing-boing). The line shoud be like a pole, not like a rubber rope.
Does anybody can give me a hint on this?

This is the code example from traer.physics

import traer.physics.*;

ParticleSystem physics;

Particle p;
Particle anchor;
Spring s;

void setup()
{
 size( 400, 400 );
 smooth();
 fill( 0 );
 ellipseMode( CENTER );

 physics = new ParticleSystem( 5.0, 0.05 );
 p = physics.makeParticle( 1.0, width/2, height/2, 0 );
 anchor = physics.makeParticle( 1.0, width/2, height/2, 0 );
 anchor.makeFixed();
 s = physics.makeSpring( p, anchor, 1.0, 0.1, 100 );
}

void draw()
{
 if ( !mousePressed )
   physics.advanceTime( 1.0 );
 else
 {
   p.moveTo( width/2+1, 0, 0 );
 }

 background( 255 );

 line( p.position().x(), p.position().y(), anchor.position().x(), anchor.position().y() );
 ellipse( anchor.position().x(), anchor.position().y(), 5, 5 );
 ellipse( p.position().x(), p.position().y(), 20, 20 );
}