Difference between revisions of "B2.RevoluteJoint"

From GiderosMobile
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revoluteJoint:enableMotor(true)</source>
 
revoluteJoint:enableMotor(true)</source>
 
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=== Methods ===
 
=== Methods ===
[[b2.RevoluteJoint:enableLimit]] {{<translate>enables or disables the joint limit</translate>}}<br/>
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[[b2.RevoluteJoint:enableLimit]] ''<translate>enables or disables the joint limit</translate>''<br/>
[[b2.RevoluteJoint:enableMotor]] {{<translate>enables or disables the joint motor</translate>}}<br/>
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[[b2.RevoluteJoint:enableMotor]] ''<translate>enables or disables the joint motor</translate>''<br/>
[[b2.RevoluteJoint:getJointAngle]] {{<translate>returns the current joint angle in radians</translate>}}<br/>
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[[b2.RevoluteJoint:getJointAngle]] ''<translate>returns the current joint angle in radians</translate>''<br/>
[[b2.RevoluteJoint:getJointSpeed]] {{<translate>returns the current joint angle speed in radians per second</translate>}}<br/>
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[[b2.RevoluteJoint:getJointSpeed]] ''<translate>returns the current joint angle speed in radians per second</translate>''<br/>
[[b2.RevoluteJoint:getLimits]] {{<translate>returns the lower and upper joint limit in radians</translate>}}<br/>
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[[b2.RevoluteJoint:getLimits]] ''<translate>returns the lower and upper joint limit in radians</translate>''<br/>
[[b2.RevoluteJoint:getMotorSpeed]] {{<translate>returns the motor speed in radians per second</translate>}}<br/>
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[[b2.RevoluteJoint:getMotorSpeed]] ''<translate>returns the motor speed in radians per second</translate>''<br/>
[[b2.RevoluteJoint:getMotorTorque]] {{<translate>returns the current motor torque given the inverse time step</translate>}}<br/>
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[[b2.RevoluteJoint:getMotorTorque]] ''<translate>returns the current motor torque given the inverse time step</translate>''<br/>
[[b2.RevoluteJoint:isLimitEnabled]] {{<translate>is the joint limit enabled?</translate>}}<br/>
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[[b2.RevoluteJoint:isLimitEnabled]] ''<translate>is the joint limit enabled?</translate>''<br/>
[[b2.RevoluteJoint:isMotorEnabled]] {{<translate>is the joint motor enabled?</translate>}}<br/>
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[[b2.RevoluteJoint:isMotorEnabled]] ''<translate>is the joint motor enabled?</translate>''<br/>
[[b2.RevoluteJoint:setLimits]] {{<translate>sets the joint limits in radians</translate>}}<br/>
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[[b2.RevoluteJoint:setLimits]] ''<translate>sets the joint limits in radians</translate>''<br/>
[[b2.RevoluteJoint:setMaxMotorTorque]] {{<translate>sets the maximum motor torque in N*m</translate>}}<br/>
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[[b2.RevoluteJoint:setMaxMotorTorque]] ''<translate>sets the maximum motor torque in N*m</translate>''<br/>
[[b2.RevoluteJoint:setMotorSpeed]] {{<translate>sets the motor speed in radians per second</translate>}}<br/>
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[[b2.RevoluteJoint:setMotorSpeed]] ''<translate>sets the motor speed in radians per second</translate>''<br/>
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=== Events ===
 
=== Events ===
 
=== Constants ===
 
=== Constants ===
 
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Revision as of 14:31, 23 August 2018

Supported platforms: android, ios, mac, pc
Available since: Gideros 2011.6

Description


A revolute joint constrains two bodies to share a common point while they are free to rotate about the point. The relative rotation about the shared point is the joint angle. You can limit the relative rotation with a joint limit that specifies a lower and upper angle. You can use a motor to drive the relative rotation about the shared point. A maximum motor torque is provided so that infinite forces are not generated.

Examples

Revolute joint

--create empty box2d body for joint
local ground = world:createBody({})
ground:setPosition(300, 480)

local jointDef = b2.createRevoluteJointDef(body, ground, 300, 300)
local revoluteJoint = world:createJoint(jointDef)
--will not let ball spin for ever
revoluteJoint:setMaxMotorTorque(1)
revoluteJoint:enableMotor(true)

Methods

b2.RevoluteJoint:enableLimit enables or disables the joint limit
b2.RevoluteJoint:enableMotor enables or disables the joint motor
b2.RevoluteJoint:getJointAngle returns the current joint angle in radians
b2.RevoluteJoint:getJointSpeed returns the current joint angle speed in radians per second
b2.RevoluteJoint:getLimits returns the lower and upper joint limit in radians
b2.RevoluteJoint:getMotorSpeed returns the motor speed in radians per second
b2.RevoluteJoint:getMotorTorque returns the current motor torque given the inverse time step
b2.RevoluteJoint:isLimitEnabled is the joint limit enabled?
b2.RevoluteJoint:isMotorEnabled is the joint motor enabled?
b2.RevoluteJoint:setLimits sets the joint limits in radians
b2.RevoluteJoint:setMaxMotorTorque sets the maximum motor torque in N*m
b2.RevoluteJoint:setMotorSpeed sets the motor speed in radians per second

Events

Constants