Difference between revisions of "B2.createRevoluteJointDef"

From GiderosMobile
m
(5 intermediate revisions by 2 users not shown)
Line 1: Line 1:
 
__NOTOC__
 
__NOTOC__
 +
<languages />
 
'''Available since:''' Gideros 2011.6<br/>
 
'''Available since:''' Gideros 2011.6<br/>
 +
'''Class:''' [[Special:MyLanguage/b2|b2]]<br/>
 +
 
=== Description ===
 
=== Description ===
<br />
+
Creates and returns a revolute joint definition table with the bodies, local anchors, and reference angle using a world anchor point.
Creates and returns a revolute joint definition table with the bodies, local anchors, and reference angle using a world anchor point.<br />
+
 
(Please refer to [[b2.World:createJoint]] function for more information about all the information needed to create a revolute joint).<br />
+
(Please refer to [[b2.World:createJoint]] function for more information about all the information needed to create a revolute joint).
<br />
 
 
<source lang="lua">
 
<source lang="lua">
 
(table) = b2.createRevoluteJointDef(bodyA,bodyB,anchorx,anchory)
 
(table) = b2.createRevoluteJointDef(bodyA,bodyB,anchorx,anchory)
 
</source>
 
</source>
 +
 
=== Parameters ===
 
=== Parameters ===
 
'''bodyA''': (b2.Body) the first attached body <br/>
 
'''bodyA''': (b2.Body) the first attached body <br/>
Line 14: Line 17:
 
'''anchorx''': (number) the x coordinate of the world anchor point <br/>
 
'''anchorx''': (number) the x coordinate of the world anchor point <br/>
 
'''anchory''': (number) the y coordinate of the world anchor point <br/>
 
'''anchory''': (number) the y coordinate of the world anchor point <br/>
 +
 
=== Return values ===
 
=== Return values ===
'''Returns''' (table) A new revolute joint definition table<br/>
+
'''Returns''' (table) a new revolute joint definition table<br/>
 +
 
 
=== Examples ===
 
=== Examples ===
'''Example'''<br/>
+
'''Revolute joint'''
<source lang="lua">local jointdef = b2.createRevoluteJointDef(bodyA, bodyB, anchorx, anchory)<br />
+
<source lang="lua">
local joint = b2.World:createJoint(jointdef)<br /></source>
+
--create empty box2d body for joint
'''Revolute joint'''<br/>
 
<source lang="lua">--create empty box2d body for joint
 
 
local ground = world:createBody({})
 
local ground = world:createBody({})
 
ground:setPosition(300, 480)
 
ground:setPosition(300, 480)
Line 27: Line 30:
 
local jointDef = b2.createRevoluteJointDef(body, ground, 300, 300)
 
local jointDef = b2.createRevoluteJointDef(body, ground, 300, 300)
 
local revoluteJoint = world:createJoint(jointDef)
 
local revoluteJoint = world:createJoint(jointDef)
--will not let ball spin for ever
+
--will not let ball spin forever
 
revoluteJoint:setMaxMotorTorque(1)
 
revoluteJoint:setMaxMotorTorque(1)
revoluteJoint:enableMotor(true)</source>
+
revoluteJoint:enableMotor(true)
 +
</source>
 +
 
 +
{{B2}}

Revision as of 02:51, 26 September 2020


Available since: Gideros 2011.6
Class: b2

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

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 forever
revoluteJoint:setMaxMotorTorque(1)
revoluteJoint:enableMotor(true)





LiquidFun