Difference between revisions of "B2.createRevoluteJointDef"
From GiderosMobile
| Line 9: | Line 9: | ||
(table) = b2.createRevoluteJointDef(bodyA,bodyB,anchorx,anchory) | (table) = b2.createRevoluteJointDef(bodyA,bodyB,anchorx,anchory) | ||
</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/> |
| − | '''anchorx''': (number) the x coordinate of the world anchor point | + | '''bodyB''': (b2.Body) the second attached body <br/> |
| − | '''anchory''': (number) the y coordinate of the world anchor point | + | '''anchorx''': (number) the x coordinate of the world anchor point <br/> |
| + | '''anchory''': (number) the y coordinate of the world anchor point <br/> | ||
| + | === Return values === | ||
'''Returns''' (table) A new revolute joint definition table<br/> | '''Returns''' (table) A new revolute joint definition table<br/> | ||
| + | === Examples === | ||
| + | '''Example'''<br/> | ||
| + | <source lang="lua">local jointdef = b2.createRevoluteJointDef(bodyA, bodyB, anchorx, anchory)<br /> | ||
| + | local joint = b2.World:createJoint(jointdef)<br /></source> | ||
| + | '''Revolute joint'''<br/> | ||
| + | <source lang="lua">--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)</source> | ||
Revision as of 10:46, 23 August 2018
Available since: Gideros 2011.6
Description
Creates and returns a revolute joint definition table with the bodies, local anchors, and reference angle using a world anchor point.
(Please refer to b2.World:createJoint function for more information about all the information needed to create a revolute joint).
(table) = b2.createRevoluteJointDef(bodyA,bodyB,anchorx,anchory)
Parameters
bodyA: (b2.Body) the first attached body
bodyB: (b2.Body) the second attached body
anchorx: (number) the x coordinate of the world anchor point
anchory: (number) the y coordinate of the world anchor point
Return values
Returns (table) A new revolute joint definition table
Examples
Example
local jointdef = b2.createRevoluteJointDef(bodyA, bodyB, anchorx, anchory)<br />
local joint = b2.World:createJoint(jointdef)<br />
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)
