B2.Contact

From GiderosMobile

This page contains changes which are not marked for translation.


Supported platforms: Platform android.pngPlatform ios.pngPlatform mac.pngPlatform pc.pngPlatform html5.pngPlatform winrt.pngPlatform win32.png
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