B2.RevoluteJoint

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

Events Constants