/// <summary>
/// Clears the contacts associated with this pair handler.
/// </summary>
public override void ClearContacts()
{
if (previousContactCount > 0)
{
//Just exited collision.
//Remove the solver item.
if (Parent != null)
{
Parent.RemoveSolverUpdateable(ContactConstraint);
}
else if (NarrowPhase != null)
{
NarrowPhase.NotifyUpdateableRemoved(ContactConstraint);
}
if (!suppressEvents)
{
var a = CollidableA;
var b = CollidableB;
a.EventTriggerer.OnCollisionEnded(b, this);
b.EventTriggerer.OnCollisionEnded(a, this);
}
}
ContactManifold.ClearContacts();
base.ClearContacts();
}
void IPairHandlerParent.RemoveSolverUpdateable(SolverUpdateable removedItem)
{
manifoldConstraintGroup.Remove(removedItem);
//If this is the last child solver item, we need to remove ourselves from our parent too.
if (manifoldConstraintGroup.SolverUpdateables.Count == 0)
{
if (Parent != null)
{
Parent.RemoveSolverUpdateable(manifoldConstraintGroup);
}
else if (NarrowPhase != null)
{
NarrowPhase.NotifyUpdateableRemoved(manifoldConstraintGroup);
}
}
}
///<summary>
/// Cleans up the pair handler.
///</summary>
public override void CleanUp()
{
//Deal with the remaining contacts.
for (int i = ContactManifold.contacts.count - 1; i >= 0; i--)
{
OnContactRemoved(ContactManifold.contacts[i]);
}
//If the constraint is still in the solver, then request to have it removed.
if (ContactConstraint.solver != null)
{
ContactConstraint.pair = null; //Setting the pair to null tells the constraint that it's going to be orphaned. It will be cleaned up on removal.
if (Parent != null)
{
Parent.RemoveSolverUpdateable(ContactConstraint);
}
else if (NarrowPhase != null)
{
NarrowPhase.NotifyUpdateableRemoved(ContactConstraint);
}
}
else
{
ContactConstraint.CleanUpReferences();//The constraint isn't in the solver, so we can safely clean it up directly.
//Even though it's not in the solver, we still may need to notify the parent to remove it.
if (Parent != null && ContactConstraint.SolverGroup != null)
{
Parent.RemoveSolverUpdateable(ContactConstraint);
}
}
ContactConstraint.CleanUp();
base.CleanUp();
ContactManifold.CleanUp();
//Child cleanup is responsible for cleaning up direct references to the involved collidables.
}
///<summary>
/// Cleans up the pair handler.
///</summary>
public override void CleanUp()
{
//Deal with the remaining contacts.
for (int i = ContactManifold.contacts.Count - 1; i >= 0; i--)
{
OnContactRemoved(ContactManifold.contacts[i]);
}
//If the constraint is still in the solver, then request to have it removed.
if (ContactConstraint.solver != null)
{
if (Parent != null)
{
Parent.RemoveSolverUpdateable(ContactConstraint);
}
else if (NarrowPhase != null)
{
NarrowPhase.NotifyUpdateableRemoved(ContactConstraint);
}
}
else
{
//Even though it's not in the solver, we still may need to notify the parent to remove it.
if (Parent != null && ContactConstraint.SolverGroup != null)
{
Parent.RemoveSolverUpdateable(ContactConstraint);
}
}
//Contact constraint cleanup changes the involved entities, which is acceptable because it's no longer in the solver.
ContactConstraint.CleanUp();
base.CleanUp();
ContactManifold.CleanUp();
//Child cleanup is responsible for cleaning up direct references to the involved collidables.
}
///<summary>
/// Updates the pair handler.
///</summary>
///<param name="dt">Timestep duration.</param>
public override void UpdateCollision(float dt)
{
//Cache some properties.
var a = CollidableA;
var b = CollidableB;
var triggerA = a.EventTriggerer;
var triggerB = b.EventTriggerer;
if (!suppressEvents)
{
triggerA.OnPairUpdated(b, this);
triggerB.OnPairUpdated(a, this);
}
ContactManifold.Update(dt);
if (ContactManifold.contacts.count > 0)
{
if (!suppressEvents)
{
triggerA.OnPairTouching(b, this);
triggerB.OnPairTouching(a, this);
}
if (previousContactCount == 0)
{
//New collision.
//Add a solver item.
if (Parent != null)
{
Parent.AddSolverUpdateable(ContactConstraint);
}
else if (NarrowPhase != null)
{
NarrowPhase.NotifyUpdateableAdded(ContactConstraint);
}
//And notify the pair members.
if (!suppressEvents)
{
triggerA.OnInitialCollisionDetected(b, this);
triggerB.OnInitialCollisionDetected(a, this);
}
}
}
else if (previousContactCount > 0)
{
//Just exited collision.
//Remove the solver item.
if (Parent != null)
{
Parent.RemoveSolverUpdateable(ContactConstraint);
}
else if (NarrowPhase != null)
{
NarrowPhase.NotifyUpdateableRemoved(ContactConstraint);
}
if (!suppressEvents)
{
triggerA.OnCollisionEnded(b, this);
triggerB.OnCollisionEnded(a, this);
}
}
previousContactCount = ContactManifold.contacts.count;
}
