Difference between revisions of "B2.Contact"

From GiderosMobile
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'''Available since:''' Gideros 2012.09.6<br/>
 
'''Available since:''' Gideros 2012.09.6<br/>
 
=== Description ===
 
=== Description ===
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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.<br />
 
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.<br />
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=== Examples ===
 
=== Examples ===
 
'''Checking collisions from bottom using b2.Contact'''<br/>
 
'''Checking collisions from bottom using b2.Contact'''<br/>

Revision as of 13:35, 23 August 2018

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