Difference between revisions of "B2.Contact"
From GiderosMobile
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'''Supported platforms:''' android, ios, mac, pc<br/> | '''Supported platforms:''' android, ios, mac, pc<br/> | ||
'''Available since:''' Gideros 2012.09.6<br/> | '''Available since:''' Gideros 2012.09.6<br/> | ||
| − | === Description === | + | === <translate>Description</translate> === |
<translate><br /> | <translate><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 /> | 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 /> | ||
<br /></translate> | <br /></translate> | ||
| − | === Examples === | + | === <translate>Examples</translate> === |
'''Checking collisions from bottom using b2.Contact'''<br/> | '''Checking collisions from bottom using b2.Contact'''<br/> | ||
<source lang="lua">local isTouchingGround = false | <source lang="lua">local isTouchingGround = false | ||
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{|- | {|- | ||
| style="width: 50%; vertical-align:top;"| | | style="width: 50%; vertical-align:top;"| | ||
| − | === Methods === | + | === <translate>Methods</translate> === |
[[Special:MyLanguage/b2.Contact:getChildIndexA|b2.Contact:getChildIndexA]] <br/> | [[Special:MyLanguage/b2.Contact:getChildIndexA|b2.Contact:getChildIndexA]] <br/> | ||
[[Special:MyLanguage/b2.Contact:getChildIndexB|b2.Contact:getChildIndexB]] <br/> | [[Special:MyLanguage/b2.Contact:getChildIndexB|b2.Contact:getChildIndexB]] <br/> | ||
| Line 42: | Line 42: | ||
[[Special:MyLanguage/b2.Contact:setRestitution|b2.Contact:setRestitution]] <br/> | [[Special:MyLanguage/b2.Contact:setRestitution|b2.Contact:setRestitution]] <br/> | ||
| style="width: 50%; vertical-align:top;"| | | style="width: 50%; vertical-align:top;"| | ||
| − | === Events === | + | === <translate>Events</translate> === |
| − | === Constants === | + | === <translate>Constants</translate> === |
|} | |} | ||
Revision as of 07:29, 24 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)
