Difference between revisions of "B2.createGearJointDef"

 
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__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 gear joint definition table.
Creates and returns a gear joint definition table.<br />
+
 
(Please refer to [[b2.World:createJoint]] function for more information about all the information needed to create a gear joint).<br />
+
(Please refer to [[b2.World:createJoint]] function for more information about all the information needed to create a gear joint).
<br />
 
 
<source lang="lua">
 
<source lang="lua">
 
(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 ''''''<br/>
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'''bodyB''': (b2.Body) the second attached body ''''''<br/>
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=== Parameters ===
'''joint1''': (b2.Joint) the first revolute/prismatic joint attached to the gear joint ''''''<br/>
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'''bodyA''': (b2.Body) the first attached body <br/>
'''joint2''': (b2.Joint) the second revolute/prismatic joint attached to the gear joint ''''''<br/>
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'''bodyB''': (b2.Body) the second attached body <br/>
'''ratio''': (number, default = 1) the gear ratio ''''''<br/>
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'''joint1''': (b2.Joint) the first revolute/prismatic joint attached to the gear joint <br/>
 +
'''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'''
 +
<source lang="lua">
 +
--create empty box2d body for joint
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local ground = world:createBody({})
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 +
--create revolute joint
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--note that ground should be passed as first parameter here
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local jointDef = b2.createRevoluteJointDef(ground, body1, 300, 300)
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local revoluteJoint = world:createJoint(jointDef)
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--set motor
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revoluteJoint:setMaxMotorTorque(1)
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revoluteJoint:enableMotor(true)
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--axisx, axisy values usually between 0 and 1
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--note that ground should be passed as first parameter here
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local jointDef = b2.createPrismaticJointDef(ground, body2, 350, 100, 0.3, 1)
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local prismaticJoint = world:createJoint(jointDef)
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--set motor
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prismaticJoint:setMaxMotorForce(1)
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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>
 +
 +
{{B2}}

Latest revision as of 05:45, 17 February 2020


Available since: Gideros 2011.6
Class: b2

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)





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