Difference between revisions of "B2.WheelJoint"

From GiderosMobile
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__NOTOC__
 
__NOTOC__
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'''Supported platforms:''' android, ios, mac, pc<br/>
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<languages />
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'''Available since:''' Gideros 2011.6<br/>
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<!-- GIDEROSOBJ:b2.WheelJoint -->
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=== Description ===
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'''<translate>Supported platforms</translate>:''' [[File:Platform android.png]][[File:Platform ios.png]][[File:Platform mac.png]][[File:Platform pc.png]][[File:Platform html5.png]][[File:Platform winrt.png]][[File:Platform win32.png]]<br/>
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<br />
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'''<translate>Available since</translate>:''' Gideros 2011.6<br/>
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A wheel joint provides two degrees of freedom: translation along an axis fixed in bodyA and rotation in the plane. You can use a <br />
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'''<translate>Inherits from</translate>:''' [[Special:MyLanguage/b2.Joint|b2.Joint]]<br/>
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joint limit to restrict the range of motion and a joint motor to drive the rotation or to model rotational friction. This joint <br />
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is designed for vehicle suspensions.<br />
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=== <translate>Description</translate> ===
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<br />
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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.
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=== <translate>Examples</translate> ===
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'''Wheel joint'''
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<syntaxhighlight lang="lua">
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--create empty box2d body for joint
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local ground = world:createBody({})
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ground:setPosition(350, 480)
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--axisx, axisy values usually between 0 and 1
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--0 0 moves freely
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--0 1 force pulling back on y axis
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--1 0 force pulling back on x axis
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--1 1 force pulling back all diretions
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local jointDef = b2.createWheelJointDef(body, ground, 350, 200, 1, 1)
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local wheelJoint = world:createJoint(jointDef)
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</syntaxhighlight>
  
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{|-
 
{|-
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| style="width: 50%;"|
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| style="width: 50%; vertical-align:top;"|
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=== Methods ===
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=== <translate>Methods</translate> ===
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[[b2.WheelJoint:enableMotor]] - enables or disables the joint motor<br/>
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[[Special:MyLanguage/b2.WheelJoint:enableMotor|b2.WheelJoint:enableMotor]] ''<translate>enables or disables the joint motor</translate>''<br/><!-- GIDEROSMTD:b2.WheelJoint:enableMotor(flag) enables or disables the joint motor -->
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[[b2.WheelJoint:getJointSpeed]] - returns the current joint translation speed in meters per second.<br/>
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[[Special:MyLanguage/b2.WheelJoint:getJointSpeed|b2.WheelJoint:getJointSpeed]] ''<translate>returns the current joint translation speed in meters per second.</translate>''<br/><!-- GIDEROSMTD:b2.WheelJoint:getJointSpeed() returns the current joint translation speed in meters per second. -->
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[[b2.WheelJoint:getJointTranslation]] - returns the current joint translation in meters.<br/>
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[[Special:MyLanguage/b2.WheelJoint:getJointTranslation|b2.WheelJoint:getJointTranslation]] ''<translate>returns the current joint translation in meters.</translate>''<br/><!-- GIDEROSMTD:b2.WheelJoint:getJointTranslation() returns the current joint translation in meters. -->
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[[b2.WheelJoint:getMaxMotorTorque]] - returns the maximum motor torque in N*m<br/>
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[[Special:MyLanguage/b2.WheelJoint:getMaxMotorTorque|b2.WheelJoint:getMaxMotorTorque]] ''<translate>returns the maximum motor torque in N*m</translate>''<br/><!-- GIDEROSMTD:b2.WheelJoint:getMaxMotorTorque() returns the maximum motor torque in N*m -->
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[[b2.WheelJoint:getMotorSpeed]] - returns the motor speed in radians per second<br/>
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[[Special:MyLanguage/b2.WheelJoint:getMotorSpeed|b2.WheelJoint:getMotorSpeed]] ''<translate>returns the motor speed in radians per second</translate>''<br/><!-- GIDEROSMTD:b2.WheelJoint:getMotorSpeed() returns the motor speed in radians per second -->
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[[b2.WheelJoint:getSpringDampingRatio]] - returns the spring damping ratio<br/>
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[[Special:MyLanguage/b2.WheelJoint:getSpringDampingRatio|b2.WheelJoint:getSpringDampingRatio]] ''<translate>returns the spring damping ratio</translate>''<br/><!-- GIDEROSMTD:b2.WheelJoint:getSpringDampingRatio() returns the spring damping ratio -->
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[[b2.WheelJoint:getSpringFrequencyHz]] - returns the spring frequency in Hertz<br/>
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[[Special:MyLanguage/b2.WheelJoint:getSpringFrequencyHz|b2.WheelJoint:getSpringFrequencyHz]] ''<translate>returns the spring frequency in Hertz</translate>''<br/><!-- GIDEROSMTD:b2.WheelJoint:getSpringFrequencyHz() returns the spring frequency in Hertz -->
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[[b2.WheelJoint:isMotorEnabled]] - is the joint motor enabled?<br/>
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[[Special:MyLanguage/b2.WheelJoint:isMotorEnabled|b2.WheelJoint:isMotorEnabled]] ''<translate>is the joint motor enabled?</translate>''<br/><!-- GIDEROSMTD:b2.WheelJoint:isMotorEnabled() is the joint motor enabled? -->
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[[b2.WheelJoint:setMaxMotorTorque]] - sets the maximum motor torque in N*m<br/>
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[[Special:MyLanguage/b2.WheelJoint:setMaxMotorTorque|b2.WheelJoint:setMaxMotorTorque]] ''<translate>sets the maximum motor torque in N*m</translate>''<br/><!-- GIDEROSMTD:b2.WheelJoint:setMaxMotorTorque(torque) sets the maximum motor torque in N*m -->
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[[b2.WheelJoint:setMotorSpeed]] - sets the motor speed in radians per second<br/>
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[[Special:MyLanguage/b2.WheelJoint:setMotorSpeed|b2.WheelJoint:setMotorSpeed]] ''<translate>sets the motor speed in radians per second</translate>''<br/><!-- GIDEROSMTD:b2.WheelJoint:setMotorSpeed(speed) sets the motor speed in radians per second -->
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[[b2.WheelJoint:setSpringDampingRatio]] - sets the spring damping ratio<br/>
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[[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 -->
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[[b2.WheelJoint:setSpringFrequencyHz]] - sets the spring frequency in Hertz (0 = disable the spring)<br/>
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[[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) -->
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| style="width: 50%;"|
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=== Events ===
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| style="width: 50%; vertical-align:top;"|
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=== Constants ===
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=== <translate>Events</translate> ===
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=== <translate>Constants</translate> ===
 
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|}
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----
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*'''[[B2.Joint]]'''
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*'''[[LiquidFun]]'''

Latest revision as of 14:26, 13 July 2023


Supported platforms: Platform android.pngPlatform ios.pngPlatform mac.pngPlatform pc.pngPlatform html5.pngPlatform winrt.pngPlatform win32.png
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)

Methods

b2.WheelJoint:enableMotor enables or disables the joint motor
b2.WheelJoint:getJointSpeed returns the current joint translation speed in meters per second.
b2.WheelJoint:getJointTranslation returns the current joint translation in meters.
b2.WheelJoint:getMaxMotorTorque returns the maximum motor torque in N*m
b2.WheelJoint:getMotorSpeed returns the motor speed in radians per second
b2.WheelJoint:getSpringDampingRatio returns the spring damping ratio
b2.WheelJoint:getSpringFrequencyHz returns the spring frequency in Hertz
b2.WheelJoint:isMotorEnabled is the joint motor enabled?
b2.WheelJoint:setMaxMotorTorque sets the maximum motor torque in N*m
b2.WheelJoint:setMotorSpeed sets the motor speed in radians per second
b2.WheelJoint:setSpringDampingRatio sets the spring damping ratio
b2.WheelJoint:setSpringFrequencyHz sets the spring frequency in Hertz (0 = disable the spring)

Events

Constants

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