B2.Contact

Supported platforms: android, ios, mac, pc
Available since: Gideros 2012.09.6

Description

The class manages contact between two shapes. A contact exists for each overlapping AABB in the broad-phase (except if filtered). Therefore a contact object may exist that has no contact points.

Examples

Checking collisions from bottom using b2.Contact

local isTouchingGround = false
world:addEventListener(Event.BEGIN_CONTACT, function(e)
	local manifold = e.contact:getWorldManifold()
	if manifold.normal.y > 0.9 then
		--collision came from bottom
		isTouchingGround = true
	end
end)
 
world:addEventListener(Event.END_CONTACT, function(e)
	local manifold = e.contact:getWorldManifold()
	if manifold.normal.y < 0.1 then
		--collision ended from bottom
		isTouchingGround = false
	end
end)

Methods b2.Contact:getChildIndexA {{}} b2.Contact:getChildIndexB {{}} b2.Contact:getFixtureA {{}} b2.Contact:getFixtureB {{}} b2.Contact:getFriction {{}} b2.Contact:getManifold {{}} b2.Contact:getRestitution {{}} b2.Contact:getWorldManifold {{}} b2.Contact:isTouching {{}} b2.Contact:resetFriction {{}} b2.Contact:resetRestitution {{}} b2.Contact:setEnabled {{}} b2.Contact:setFriction {{}} b2.Contact:setRestitution {{}}

Events Constants