private void FixedUpdate()
{
for (int i = 0; i < continousCollisionContacts.Count; i++)
{
if (!continousCollisionContacts[i].IsAlive)
{
continousCollisionContacts.RemoveAt(i);
i--;
}
else
{
SpeculativeCollisionContact c = continousCollisionContacts[i];
c.Lifetime -= 1;
continousCollisionContacts[i] = c;
}
}
}
protected void processSpeculativeCollision(TCollision collision)
{
int collisions = 0;
//Loop over all contacts of the collision
for (int i = 0; i < collision.ContactCount; i++)
{
TContact contactPoint = collision.GetContact(i);
IImpactObject thisObject = getImpactObject(contactPoint.ThisObject);
if (thisObject != null)
{
SpeculativeCollisionContact c = new SpeculativeCollisionContact()
{
RelativeContactPoint = thisObject.GetContactPointRelativePosition(contactPoint.Point),
Lifetime = _contactPointLifetime
};
//The relative position of the contact point serves as a unique identifier
//So we can keep track of contact points between frames
//If there is no existing point with the same relative position (within a threshold), then it is a "new" contact point.
//We then process the point, basically mimicking an OnCollisionEnter message.
int existingIndex = continousCollisionContacts.FindIndex(e => (e.RelativeContactPoint - c.RelativeContactPoint).sqrMagnitude < _contactPointComparisonThreshold);
if (existingIndex == -1)
{
continousCollisionContacts.Add(c);
if (collisions < MaxCollisionsPerFrame)
{
processCollisionContact(collision, contactPoint);
collisions++;
}
}
else
{
SpeculativeCollisionContact existingContact = continousCollisionContacts[existingIndex];
existingContact.Lifetime = _contactPointLifetime;
continousCollisionContacts[existingIndex] = existingContact;
}
}
}
}