Difference between revisions of "B2.PulleyJoint"
From GiderosMobile
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'''<translate>Available since</translate>:''' Gideros 2011.6<br/> | '''<translate>Available since</translate>:''' Gideros 2011.6<br/> | ||
'''<translate>Inherits from</translate>:''' [[Special:MyLanguage/b2.Joint|b2.Joint]]<br/> | '''<translate>Inherits from</translate>:''' [[Special:MyLanguage/b2.Joint|b2.Joint]]<br/> | ||
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=== <translate>Description</translate> === | === <translate>Description</translate> === | ||
| − | + | 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. | |
| − | The pulley joint is connected to two bodies and two fixed ground points. The pulley supports a ratio such that: length1 ratio * length2 | + | |
| − | |||
=== <translate>Examples</translate> === | === <translate>Examples</translate> === | ||
| − | '''Pulley joint''' | + | '''Pulley joint''' |
| − | < | + | <syntaxhighlight lang="lua"> |
| + | --create empty box2d body for joint | ||
local ground = world:createBody({}) | local ground = world:createBody({}) | ||
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350, 300, --coordinates where "imaginary string" is attached in the body 2 | 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 | 1) -- ratio (if < 1 -> makes body 2 heavier, > 1 makes body 1 heavier, =1 makes them equal | ||
| − | local pulleyJoint = world:createJoint(jointDef)</ | + | local pulleyJoint = world:createJoint(jointDef) |
| + | </syntaxhighlight> | ||
| + | |||
{|- | {|- | ||
| style="width: 50%; vertical-align:top;"| | | style="width: 50%; vertical-align:top;"| | ||
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[[Special:MyLanguage/b2.PulleyJoint:getLengthB|b2.PulleyJoint:getLengthB]] ''<translate>returns the current length of the segment attached to bodyB</translate>''<br/><!-- GIDEROSMTD:b2.PulleyJoint:getLengthB() returns the current length of the segment attached to bodyB --> | [[Special:MyLanguage/b2.PulleyJoint:getLengthB|b2.PulleyJoint:getLengthB]] ''<translate>returns the current length of the segment attached to bodyB</translate>''<br/><!-- GIDEROSMTD:b2.PulleyJoint:getLengthB() returns the current length of the segment attached to bodyB --> | ||
[[Special:MyLanguage/b2.PulleyJoint:getRatio|b2.PulleyJoint:getRatio]] ''<translate>returns the joint ratio</translate>''<br/><!-- GIDEROSMTD:b2.PulleyJoint:getRatio() returns the joint ratio --> | [[Special:MyLanguage/b2.PulleyJoint:getRatio|b2.PulleyJoint:getRatio]] ''<translate>returns the joint ratio</translate>''<br/><!-- GIDEROSMTD:b2.PulleyJoint:getRatio() returns the joint ratio --> | ||
| + | |||
| style="width: 50%; vertical-align:top;"| | | style="width: 50%; vertical-align:top;"| | ||
=== <translate>Events</translate> === | === <translate>Events</translate> === | ||
=== <translate>Constants</translate> === | === <translate>Constants</translate> === | ||
|} | |} | ||
| + | |||
| + | ---- | ||
| + | *'''[[B2.Joint]]''' | ||
| + | *'''[[LiquidFun]]''' | ||
Latest revision as of 16:55, 12 July 2023
Supported platforms: 
Available since: Gideros 2011.6
Inherits from: b2.Joint
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)
Methodsb2.PulleyJoint:getGroundAnchorA returns the x and y coordinates of the first ground anchor |
EventsConstants |
