Difference between revisions of "B2.PulleyJoint"
From GiderosMobile
| Line 2: | Line 2: | ||
'''Supported platforms:''' android, ios, mac, pc<br/> | '''Supported platforms:''' android, ios, mac, pc<br/> | ||
'''Available since:''' Gideros 2011.6<br/> | '''Available since:''' Gideros 2011.6<br/> | ||
| − | === Description === | + | === <translate>Description</translate> === |
<translate><br /> | <translate><br /> | ||
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. <br /> | 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. <br /> | ||
<br /></translate> | <br /></translate> | ||
| − | === 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 | ||
| Line 20: | Line 20: | ||
{|- | {|- | ||
| style="width: 50%; vertical-align:top;"| | | style="width: 50%; vertical-align:top;"| | ||
| − | === Methods === | + | === <translate>Methods</translate> === |
[[Special:MyLanguage/b2.PulleyJoint:getGroundAnchorA|b2.PulleyJoint:getGroundAnchorA]] ''<translate>returns the x and y coordinates of the first ground anchor</translate>''<br/> | [[Special:MyLanguage/b2.PulleyJoint:getGroundAnchorA|b2.PulleyJoint:getGroundAnchorA]] ''<translate>returns the x and y coordinates of the first ground anchor</translate>''<br/> | ||
[[Special:MyLanguage/b2.PulleyJoint:getGroundAnchorB|b2.PulleyJoint:getGroundAnchorB]] ''<translate>returns the x and y coordinates of the second ground anchor</translate>''<br/> | [[Special:MyLanguage/b2.PulleyJoint:getGroundAnchorB|b2.PulleyJoint:getGroundAnchorB]] ''<translate>returns the x and y coordinates of the second ground anchor</translate>''<br/> | ||
| Line 27: | Line 27: | ||
[[Special:MyLanguage/b2.PulleyJoint:getRatio|b2.PulleyJoint:getRatio]] ''<translate>returns the joint ratio</translate>''<br/> | [[Special:MyLanguage/b2.PulleyJoint:getRatio|b2.PulleyJoint:getRatio]] ''<translate>returns the joint ratio</translate>''<br/> | ||
| style="width: 50%; vertical-align:top;"| | | style="width: 50%; vertical-align:top;"| | ||
| − | === Events === | + | === <translate>Events</translate> === |
| − | === Constants === | + | === <translate>Constants</translate> === |
|} | |} | ||
Revision as of 08:28, 24 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)
Methodsb2.PulleyJoint:getGroundAnchorA returns the x and y coordinates of the first ground anchor |
EventsConstants |
