B2.PrismaticJoint

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

Description

A prismatic joint. This joint provides one degree of freedom: translation along an axis fixed in body1. Relative rotation is prevented. You can use a joint limit to restrict the range of motion and a joint motor to drive the motion or to model joint friction.

Examples

Prismatic joint

--create empty box2d body for joint
local ground = world:createBody({})
ground:setPosition(465, 480)

--axisx, 	axisy	values usually between 0 and 1
--0			0		moves freely
--0			1		moves on y axis
--1			0		moves on x axis
--1			1		moves on diagonal
local jointDef = b2.createPrismaticJointDef(body, ground, 350, 100, 0.3, 1)
local prismaticJoint = world:createJoint(jointDef)

Methods b2.PrismaticJoint:enableLimit - enables or disables the joint limit b2.PrismaticJoint:enableMotor - enables or disables the joint motor b2.PrismaticJoint:getJointSpeed - returns the current joint translation speed in meters per second b2.PrismaticJoint:getJointTranslation - returns the current joint translation in meters b2.PrismaticJoint:getLimits - returns the lower and upper joint limits in meters b2.PrismaticJoint:getMotorSpeed - returns the motor speed in meters per second b2.PrismaticJoint:isLimitEnabled - is the joint limit enabled? b2.PrismaticJoint:isMotorEnabled - is the joint motor enabled? b2.PrismaticJoint:setLimits - sets the joint limits in meters b2.PrismaticJoint:setMaxMotorForce - sets the maximum motor force in N b2.PrismaticJoint:setMotorSpeed - sets the motor speed in meters per second b2.RevoluteJoint:getMotorForce - returns the current motor force given the inverse time step

Events Constants