Difference between revisions of "B2.WheelJoint"
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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/> | ||
| + | |||
=== <translate>Description</translate> === | === <translate>Description</translate> === | ||
| − | + | A wheel joint provides two degrees of freedom: translation along an axis fixed in bodyA and rotation in the plane. You can use a joint limit to restrict the range of motion and a joint motor to drive the rotation or to model rotational friction. This joint is designed for vehicle suspensions. | |
| − | A wheel joint provides two degrees of freedom: translation along an axis fixed in bodyA and rotation in the plane. You can use a | + | |
| − | joint limit to restrict the range of motion and a joint motor to drive the rotation or to model rotational friction. This joint | ||
| − | is designed for vehicle suspensions. | ||
| − | |||
=== <translate>Examples</translate> === | === <translate>Examples</translate> === | ||
| − | '''Wheel joint''' | + | '''Wheel joint''' |
| − | <source lang="lua">--create empty box2d body for joint | + | <source lang="lua"> |
| + | --create empty box2d body for joint | ||
local ground = world:createBody({}) | local ground = world:createBody({}) | ||
ground:setPosition(350, 480) | ground:setPosition(350, 480) | ||
| − | --axisx, | + | --axisx, axisy values usually between 0 and 1 |
| − | --0 | + | --0 0 moves freely |
| − | --0 | + | --0 1 force pulling back on y axis |
| − | --1 | + | --1 0 force pulling back on x axis |
| − | --1 | + | --1 1 force pulling back all diretions |
local jointDef = b2.createWheelJointDef(body, ground, 350, 200, 1, 1) | local jointDef = b2.createWheelJointDef(body, ground, 350, 200, 1, 1) | ||
| − | local wheelJoint = world:createJoint(jointDef)</source> | + | local wheelJoint = world:createJoint(jointDef) |
| + | </source> | ||
| + | |||
{|- | {|- | ||
| style="width: 50%; vertical-align:top;"| | | style="width: 50%; vertical-align:top;"| | ||
| Line 39: | Line 40: | ||
[[Special:MyLanguage/b2.WheelJoint:setSpringDampingRatio|b2.WheelJoint:setSpringDampingRatio]] ''<translate>sets the spring damping ratio</translate>''<br/><!-- GIDEROSMTD:b2.WheelJoint:setSpringDampingRatio(damping) sets the spring damping ratio --> | [[Special:MyLanguage/b2.WheelJoint:setSpringDampingRatio|b2.WheelJoint:setSpringDampingRatio]] ''<translate>sets the spring damping ratio</translate>''<br/><!-- GIDEROSMTD:b2.WheelJoint:setSpringDampingRatio(damping) sets the spring damping ratio --> | ||
[[Special:MyLanguage/b2.WheelJoint:setSpringFrequencyHz|b2.WheelJoint:setSpringFrequencyHz]] ''<translate>sets the spring frequency in Hertz (0 = disable the spring)</translate>''<br/><!-- GIDEROSMTD:b2.WheelJoint:setSpringFrequencyHz(frequency) sets the spring frequency in Hertz (0 = disable the spring) --> | [[Special:MyLanguage/b2.WheelJoint:setSpringFrequencyHz|b2.WheelJoint:setSpringFrequencyHz]] ''<translate>sets the spring frequency in Hertz (0 = disable the spring)</translate>''<br/><!-- GIDEROSMTD:b2.WheelJoint:setSpringFrequencyHz(frequency) sets the spring frequency in Hertz (0 = disable the spring) --> | ||
| + | |||
| 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]]''' | ||
Revision as of 16:17, 18 February 2020
Supported platforms: 
Available since: Gideros 2011.6
Inherits from: b2.Joint
Description
A wheel joint provides two degrees of freedom: translation along an axis fixed in bodyA and rotation in the plane. You can use a joint limit to restrict the range of motion and a joint motor to drive the rotation or to model rotational friction. This joint is designed for vehicle suspensions.
Examples
Wheel joint
--create empty box2d body for joint
local ground = world:createBody({})
ground:setPosition(350, 480)
--axisx, axisy values usually between 0 and 1
--0 0 moves freely
--0 1 force pulling back on y axis
--1 0 force pulling back on x axis
--1 1 force pulling back all diretions
local jointDef = b2.createWheelJointDef(body, ground, 350, 200, 1, 1)
local wheelJoint = world:createJoint(jointDef)
Methodsb2.WheelJoint:enableMotor enables or disables the joint motor |
EventsConstants |
