public Particle(double m, THREE.Vector3 pos)
{
position = pos.clone();
previous = pos.clone();
original = pos.clone();
acc = new THREE.Vector3(0, 0, 0);
mass = m;
invMass = 1.0 / mass;
}
public void integrate(double deltaT)
{
if (IsFixed)
{
ToOriginal();
return;
}
acc.multiplyScalar(ParticleConstants.DAMPING);
THREE.Vector3 newPos = this.position.clone().sub(previous);
newPos.add(acc.multiplyScalar(deltaT * deltaT));
newPos.add(position);
previous = position.clone();
position = newPos;
acc.set(0, 0, 0);
}
public void addForce(THREE.Vector3 force)
{
THREE.Vector3 a = force.clone();
a.multiplyScalar(invMass);
acc.add(a);
}