public void TestUpdate()
{
var forceRegistry = new ForceRegistry();
var force = new ParticleConstantForce(new Vector2D(5, 0));
var p = new Particle {
Mass = 1
};
force.Add(p);
this.TestAddForceGenerator(forceRegistry, force);
forceRegistry.Update(1 / 60.0);
p.Update(1 / 60.0);
Assert.AreEqual(new Vector2D(5, 0), p.Acceleration, "物体被赋予正确的加速度");
p.Acceleration = Vector2D.Zero;
this.TestRemoveForceGenerator(forceRegistry, force);
forceRegistry.Update(1 / 60.0);
p.Update(1 / 60.0);
Assert.AreEqual(new Vector2D(0, 0), p.Acceleration, "删去作用力发生器，物体不再受该作用力发生器所产生的力");
force.Add(p);
this.TestAddForceGenerator(forceRegistry, force);
this.TestRemoveParticle(forceRegistry, p);
forceRegistry.Update(1 / 60.0);
p.Update(1 / 60.0);
Assert.AreEqual(new Vector2D(0, 0), p.Acceleration, "删去物体，物体不再受该作用力发生器所产生的力");
}
/// <summary>
/// Processes all the physics for the particle world.
/// </summary>
/// <param name="secondsElapsed">Seconds since last run</param>
private void RunPhysics(float secondsElapsed)
{
//Apply all force generators
forceRegistry.Update(secondsElapsed);
//Integrate to update position, velocity, acceleration and orientation
Integrate(secondsElapsed);
//TODO: implements contact generators and resolvers
//Genera i contacts tra le particles
//uint usedContacts = GenerateContacts();
//Processa i contacts
//if (calculateIterations) resolver.SetIterations(usedContacts * 2);
//if (usedContacts > 0)
// resolver.ResolveContacts(contacts, usedContacts, duration);
// Svuota gli accumularori di forze all'interno delle particelle
//for (int i = 0; i < rigidBodies.Count; i++)
// rigidBodies[i].ClearAccumulator();
}
/// <summary>
/// Processes all the physics for the particle world.
/// </summary>
/// <param name="duration">Secondi</param>
public void RunPhysics(float duration)
{
//Applica tutti i force generator
forceRegistry.Update(duration);
//Integra le forze per aggiornarne la posizione
Integrate(duration);
//Genera i contacts tra le particles
uint usedContacts = GenerateContacts();
//Processa i contacts
//if (calculateIterations) resolver.SetIterations(usedContacts * 2);
if (usedContacts > 0)
{
resolver.ResolveContacts(contacts, usedContacts, duration);
}
// Svuota gli accumularori di forze all'interno delle particelle
//for (int i = 0; i < Particles.Count; i++)
// Particles[i].ClearAccumulator();
}