Difference between revisions of "B2.RevoluteJoint"
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'''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 /> | ||
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. <br /> | 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. <br /> | ||
<br /></translate> | <br /></translate> | ||
| − | === Examples === | + | === <translate>Examples</translate> === |
'''Revolute joint'''<br/> | '''Revolute joint'''<br/> | ||
<source lang="lua">--create empty box2d body for joint | <source lang="lua">--create empty box2d body for joint | ||
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{|- | {|- | ||
| style="width: 50%; vertical-align:top;"| | | style="width: 50%; vertical-align:top;"| | ||
| − | === Methods === | + | === <translate>Methods</translate> === |
[[Special:MyLanguage/b2.RevoluteJoint:enableLimit|b2.RevoluteJoint:enableLimit]] ''<translate>enables or disables the joint limit</translate>''<br/> | [[Special:MyLanguage/b2.RevoluteJoint:enableLimit|b2.RevoluteJoint:enableLimit]] ''<translate>enables or disables the joint limit</translate>''<br/> | ||
[[Special:MyLanguage/b2.RevoluteJoint:enableMotor|b2.RevoluteJoint:enableMotor]] ''<translate>enables or disables the joint motor</translate>''<br/> | [[Special:MyLanguage/b2.RevoluteJoint:enableMotor|b2.RevoluteJoint:enableMotor]] ''<translate>enables or disables the joint motor</translate>''<br/> | ||
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[[Special:MyLanguage/b2.RevoluteJoint:setMotorSpeed|b2.RevoluteJoint:setMotorSpeed]] ''<translate>sets the motor speed in radians per second</translate>''<br/> | [[Special:MyLanguage/b2.RevoluteJoint:setMotorSpeed|b2.RevoluteJoint:setMotorSpeed]] ''<translate>sets the motor speed in radians per second</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
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)
Methodsb2.RevoluteJoint:enableLimit enables or disables the joint limit |
EventsConstants |
