Difference between revisions of "B2.createGearJointDef"
From GiderosMobile
| Line 9: | Line 9: | ||
(table) = b2.createGearJointDef(bodyA,bodyB,joint1,joint2,ratio) | (table) = b2.createGearJointDef(bodyA,bodyB,joint1,joint2,ratio) | ||
</source> | </source> | ||
| − | '''bodyA''': (b2.Body) the first attached body | + | === Parameters === |
| − | '''bodyB''': (b2.Body) the second attached body | + | '''bodyA''': (b2.Body) the first attached body <br/> |
| − | '''joint1''': (b2.Joint) the first revolute/prismatic joint attached to the gear joint | + | '''bodyB''': (b2.Body) the second attached body <br/> |
| − | '''joint2''': (b2.Joint) the second revolute/prismatic joint attached to the gear joint | + | '''joint1''': (b2.Joint) the first revolute/prismatic joint attached to the gear joint <br/> |
| − | '''ratio''': (number, default = 1) the gear ratio | + | '''joint2''': (b2.Joint) the second revolute/prismatic joint attached to the gear joint <br/> |
| + | '''ratio''': (number, default = 1) the gear ratio <br/> | ||
| + | === Return values === | ||
'''Returns''' (table) A new gear joint definition table<br/> | '''Returns''' (table) A new gear joint definition table<br/> | ||
| + | === Examples === | ||
| + | '''Gear joint combining revolute and prismatic joints'''<br/> | ||
| + | <source lang="lua">--create empty box2d body for joint | ||
| + | local ground = world:createBody({}) | ||
| + | |||
| + | --create revolute joint | ||
| + | --note that ground should be passed as first parameter here | ||
| + | local jointDef = b2.createRevoluteJointDef(ground, body1, 300, 300) | ||
| + | local revoluteJoint = world:createJoint(jointDef) | ||
| + | --set motor | ||
| + | revoluteJoint:setMaxMotorTorque(1) | ||
| + | revoluteJoint:enableMotor(true) | ||
| + | |||
| + | --axisx, axisy values usually between 0 and 1 | ||
| + | --note that ground should be passed as first parameter here | ||
| + | local jointDef = b2.createPrismaticJointDef(ground, body2, 350, 100, 0.3, 1) | ||
| + | local prismaticJoint = world:createJoint(jointDef) | ||
| + | --set motor | ||
| + | prismaticJoint:setMaxMotorForce(1) | ||
| + | prismaticJoint:enableMotor(true) | ||
| + | |||
| + | |||
| + | --create gear joint using two already created joints | ||
| + | local jointDef = b2.createGearJointDef(body1, body2, revoluteJoint, prismaticJoint, 1) | ||
| + | local gearJoint = world:createJoint(jointDef)</source> | ||
Revision as of 10:44, 23 August 2018
Available since: Gideros 2011.6
Description
Creates and returns a gear joint definition table.
(Please refer to b2.World:createJoint function for more information about all the information needed to create a gear joint).
(table) = b2.createGearJointDef(bodyA,bodyB,joint1,joint2,ratio)
Parameters
bodyA: (b2.Body) the first attached body
bodyB: (b2.Body) the second attached body
joint1: (b2.Joint) the first revolute/prismatic joint attached to the gear joint
joint2: (b2.Joint) the second revolute/prismatic joint attached to the gear joint
ratio: (number, default = 1) the gear ratio
Return values
Returns (table) A new gear joint definition table
Examples
Gear joint combining revolute and prismatic joints
--create empty box2d body for joint
local ground = world:createBody({})
--create revolute joint
--note that ground should be passed as first parameter here
local jointDef = b2.createRevoluteJointDef(ground, body1, 300, 300)
local revoluteJoint = world:createJoint(jointDef)
--set motor
revoluteJoint:setMaxMotorTorque(1)
revoluteJoint:enableMotor(true)
--axisx, axisy values usually between 0 and 1
--note that ground should be passed as first parameter here
local jointDef = b2.createPrismaticJointDef(ground, body2, 350, 100, 0.3, 1)
local prismaticJoint = world:createJoint(jointDef)
--set motor
prismaticJoint:setMaxMotorForce(1)
prismaticJoint:enableMotor(true)
--create gear joint using two already created joints
local jointDef = b2.createGearJointDef(body1, body2, revoluteJoint, prismaticJoint, 1)
local gearJoint = world:createJoint(jointDef)
