Difference between revisions of "B2.Contact"
From GiderosMobile
| Line 1: | Line 1: | ||
__NOTOC__ | __NOTOC__ | ||
| − | '''<translate>Supported platforms</translate>:''' [[File:Platform android]][[File:Platform ios]][[File:Platform mac]][[File:Platform pc]]<br/> | + | '''<translate>Supported platforms</translate>:''' [[File:Platform android.png]][[File:Platform ios.png]][[File:Platform mac.png]][[File:Platform pc.png]]<br/> |
'''<translate>Available since</translate>:''' Gideros 2012.09.6<br/> | '''<translate>Available since</translate>:''' Gideros 2012.09.6<br/> | ||
=== <translate>Description</translate> === | === <translate>Description</translate> === | ||
Revision as of 10:37, 24 August 2018
Supported platforms: 
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)
