Method DestroyFixture

DynamicsB2Body.go:653–712

(fixture *B2Fixture)

}

func (body *B2Body) DestroyFixture(fixture *B2Fixture) {

	if fixture == nil {
		return
	}

	B2Assert(body.M_world.IsLocked() == false)
	if body.M_world.IsLocked() == true {
		return
	}

	B2Assert(fixture.M_body == body)

	// Remove the fixture from this body's singly linked list.
	B2Assert(body.M_fixtureCount > 0)
	node := &body.M_fixtureList
	found := false
	for *node != nil {
		if *node == fixture {
			*node = fixture.M_next
			found = true
			break
		}

		node = &(*node).M_next
	}

	// You tried to remove a shape that is not attached to this body.
	B2Assert(found)

	// Destroy any contacts associated with the fixture.
	edge := body.M_contactList
	for edge != nil {
		c := edge.Contact
		edge = edge.Next

		fixtureA := c.GetFixtureA()
		fixtureB := c.GetFixtureB()

		if fixture == fixtureA || fixture == fixtureB {
			// This destroys the contact and removes it from
			// this body's contact list.
			body.M_world.M_contactManager.Destroy(c)
		}
	}

	if (body.M_flags & B2Body_Flags.E_activeFlag) != 0x0000 {
		broadPhase := &body.M_world.M_contactManager.M_broadPhase
		fixture.DestroyProxies(broadPhase)
	}

	fixture.M_body = nil
	fixture.M_next = nil
	fixture.Destroy()

	body.M_fixtureCount--

	// Reset the mass data.