Difference between revisions of "B2.createPulleyJointDef"
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__NOTOC__ | __NOTOC__ | ||
| − | '''Available since:''' Gideros 2011.6<br/> | + | '''<translate>Available since</translate>:''' Gideros 2011.6<br/> |
| − | === Description === | + | === <translate>Description</translate> === |
<translate><br /> | <translate><br /> | ||
Creates and returns a pulley joint definition table with the bodies, anchors, lengths, max lengths, and ratio using the world anchors.<br /> | Creates and returns a pulley joint definition table with the bodies, anchors, lengths, max lengths, and ratio using the world anchors.<br /> | ||
| Line 9: | Line 9: | ||
(table) = b2.createPulleyJointDef(bodyA,bodyB,groundAnchorAx,groundAnchorAy,groundAnchorBx,groundAnchorBy,anchorAx,anchorAy,anchorBx,anchorBy,ratio) | (table) = b2.createPulleyJointDef(bodyA,bodyB,groundAnchorAx,groundAnchorAy,groundAnchorBx,groundAnchorBy,anchorAx,anchorAy,anchorBx,anchorBy,ratio) | ||
</source> | </source> | ||
| − | === Parameters === | + | === <translate>Parameters</translate> === |
'''bodyA''': (b2.Body) <translate>the first attached body</translate> <br/> | '''bodyA''': (b2.Body) <translate>the first attached body</translate> <br/> | ||
'''bodyB''': (b2.Body) <translate>the second attached body</translate> <br/> | '''bodyB''': (b2.Body) <translate>the second attached body</translate> <br/> | ||
| Line 21: | Line 21: | ||
'''anchorBy''': (number) <translate>the y coordinate of the world anchor point of bodyB</translate> <br/> | '''anchorBy''': (number) <translate>the y coordinate of the world anchor point of bodyB</translate> <br/> | ||
'''ratio''': (number) <translate>the pulley ratio, used to simulate a block-and-tackle</translate> <br/> | '''ratio''': (number) <translate>the pulley ratio, used to simulate a block-and-tackle</translate> <br/> | ||
| − | === Return values === | + | === <translate>Return values</translate> === |
| − | '''Returns''' (table) <translate>A new pulley joint definition table</translate><br/> | + | '''<translate>Returns</translate>''' (table) <translate>A new pulley joint definition table</translate><br/> |
| − | === Examples === | + | === <translate>Examples</translate> === |
'''Pulley joint'''<br/> | '''Pulley joint'''<br/> | ||
<source lang="lua">--create empty box2d body for joint | <source lang="lua">--create empty box2d body for joint | ||
Revision as of 07:30, 24 August 2018
Available since: Gideros 2011.6
Description
Creates and returns a pulley joint definition table with the bodies, anchors, lengths, max lengths, and ratio using the world anchors.
(Please refer to b2.World:createJoint function for more information about all the information needed to create a pulley joint).
(table) = b2.createPulleyJointDef(bodyA,bodyB,groundAnchorAx,groundAnchorAy,groundAnchorBx,groundAnchorBy,anchorAx,anchorAy,anchorBx,anchorBy,ratio)
Parameters
bodyA: (b2.Body) the first attached body
bodyB: (b2.Body) the second attached body
groundAnchorAx: (number) the x coordinate of the first ground anchor in world coordinates. This point never moves.
groundAnchorAy: (number) the y coordinate of the first ground anchor in world coordinates. This point never moves.
groundAnchorBx: (number) the x coordinate of the second ground anchor in world coordinates. This point never moves.
groundAnchorBy: (number) the y coordinate of the second ground anchor in world coordinates. This point never moves.
anchorAx: (number) the x coordinate of the world anchor point of bodyA
anchorAy: (number) the y coordinate of the world anchor point of bodyA
anchorBx: (number) the x coordinate of the world anchor point of bodyB
anchorBy: (number) the y coordinate of the world anchor point of bodyB
ratio: (number) the pulley ratio, used to simulate a block-and-tackle
Return values
Returns (table) A new pulley joint definition table
Examples
Pulley joint
--create empty box2d body for joint
local ground = world:createBody({})
local jointDef = b2.createPulleyJointDef(body1, body2,
200, 100, --coordinates where "imaginary string" is attached in the air for body 1
350, 100, --coordinates where "imaginary string" is attached in the air for body 2
200, 300, --coordinates where "imaginary string" is attached to the body 1
350, 300, --coordinates where "imaginary string" is attached in the body 2
1) -- ratio (if < 1 -> makes body 2 heavier, > 1 makes body 1 heavier, =1 makes them equal
local pulleyJoint = world:createJoint(jointDef)
