Method AddPair

DynamicsB2ContactManager.go:151–262

(proxyUserDataA interface{}, proxyUserDataB interface{})

}

func (mgr *B2ContactManager) AddPair(proxyUserDataA interface{}, proxyUserDataB interface{}) {

	proxyA := proxyUserDataA.(*B2FixtureProxy)
	proxyB := proxyUserDataB.(*B2FixtureProxy)

	fixtureA := proxyA.Fixture
	fixtureB := proxyB.Fixture

	indexA := proxyA.ChildIndex
	indexB := proxyB.ChildIndex

	bodyA := fixtureA.GetBody()
	bodyB := fixtureB.GetBody()

	// Are the fixtures on the same body?
	if bodyA == bodyB {
		return
	}

	// TODO_ERIN use a hash table to remove a potential bottleneck when both
	// bodies have a lot of contacts.
	// Does a contact already exist?
	edge := bodyB.GetContactList()
	for edge != nil {
		if edge.Other == bodyA {
			fA := edge.Contact.GetFixtureA()
			fB := edge.Contact.GetFixtureB()
			iA := edge.Contact.GetChildIndexA()
			iB := edge.Contact.GetChildIndexB()

			if fA == fixtureA && fB == fixtureB && iA == indexA && iB == indexB {
				// A contact already exists.
				return
			}

			if fA == fixtureB && fB == fixtureA && iA == indexB && iB == indexA {
				// A contact already exists.
				return
			}
		}

		edge = edge.Next
	}

	// Does a joint override collision? Is at least one body dynamic?
	if bodyB.ShouldCollide(bodyA) == false {
		return
	}

	// Check user filtering.
	if mgr.M_contactFilter != nil && mgr.M_contactFilter.ShouldCollide(fixtureA, fixtureB) == false {
		return
	}

	// Call the factory.
	c := B2ContactFactory(fixtureA, indexA, fixtureB, indexB)
	if c == nil {
		return