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Collision filter doesn't work #34
Description
I have two boxes that I want to prevent from colliding with each other. I’m setting filter.GroupIndex = -1 for both boxes, but they still keep colliding. Here’s a sample of the code:
`
func() {
bodyDef := box2d.MakeB2BodyDef()
bodyDef.Type = box2d.B2BodyType.B2_dynamicBody
bodyDef.Position.Set(-3, -3.0)
body := world.CreateBody(&bodyDef)
box := box2d.MakeB2PolygonShape()
box.SetAsBox(1.0, 1.0)
body.ApplyLinearImpulseToCenter(box2d.B2Vec2{X: 10, Y: -0}, true)
fixtureDef := box2d.MakeB2FixtureDef()
fixtureDef.Shape = &box
fixtureDef.Filter = box2d.MakeB2Filter()
fixtureDef.Filter.GroupIndex = -1
f := body.CreateFixtureFromDef(&fixtureDef)
f.Dump(0)
}()
func() {
bodyDef := box2d.MakeB2BodyDef()
bodyDef.Type = box2d.B2BodyType.B2_dynamicBody
bodyDef.Position.Set(3, -3.0)
body := world.CreateBody(&bodyDef)
box := box2d.MakeB2PolygonShape()
box.SetAsBox(1.0, 1.0)
fixtureDef := box2d.MakeB2FixtureDef()
fixtureDef.Shape = &box
fixtureDef.Filter = box2d.MakeB2Filter()
fixtureDef.Filter.GroupIndex = -1
body.CreateFixtureFromDef(&fixtureDef)
}()`
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