Difference between revisions of "B2.PulleyJoint"
From GiderosMobile
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=== Methods === | === Methods === | ||
| − | [[b2.PulleyJoint:getGroundAnchorA]] | + | [[b2.PulleyJoint:getGroundAnchorA]] {{<translate>returns the x and y coordinates of the first ground anchor</translate>}}<br/> |
| − | [[b2.PulleyJoint:getGroundAnchorB]] | + | [[b2.PulleyJoint:getGroundAnchorB]] {{<translate>returns the x and y coordinates of the second ground anchor</translate>}}<br/> |
| − | [[b2.PulleyJoint:getLengthA]] | + | [[b2.PulleyJoint:getLengthA]] {{<translate>returns the current length of the segment attached to bodyA</translate>}}<br/> |
| − | [[b2.PulleyJoint:getLengthB]] | + | [[b2.PulleyJoint:getLengthB]] {{<translate>returns the current length of the segment attached to bodyB</translate>}}<br/> |
| − | [[b2.PulleyJoint:getRatio]] | + | [[b2.PulleyJoint:getRatio]] {{<translate>returns the joint ratio</translate>}}<br/> |
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=== Events === | === Events === | ||
=== Constants === | === Constants === | ||
|} | |} | ||
Revision as of 14:19, 23 August 2018
Supported platforms: android, ios, mac, pc
Available since: Gideros 2011.6
Description
The pulley joint is connected to two bodies and two fixed ground points. The pulley supports a ratio such that: length1 ratio * length2 <= constant Yes, the force transmitted is scaled by the ratio. The pulley also enforces a maximum length limit on both sides. This is useful to prevent one side of the pulley hitting the top.
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)
