Difference between revisions of "B2.PrismaticJoint"

From GiderosMobile
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__NOTOC__
 
__NOTOC__
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'''Supported platforms:''' android, ios, mac, pc<br/>
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<languages />
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<!-- GIDEROSOBJ:b2.PrismaticJoint -->
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'''Supported platforms:''' [[File:Platform android.png]][[File:Platform ios.png]][[File:Platform mac.png]][[File:Platform pc.png]][[File:Platform html5.png]][[File:Platform winrt.png]][[File:Platform win32.png]]<br/>
 
'''Available since:''' Gideros 2011.6<br/>
 
'''Available since:''' Gideros 2011.6<br/>
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'''Inherits from:''' [[Special:MyLanguage/b2.Joint|b2.Joint]]<br/>
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=== Description ===
 
=== Description ===
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<br />
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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.
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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. <br />
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<br />
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=== Examples ===
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'''Prismatic joint'''
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<syntaxhighlight lang="lua">
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--create empty box2d body for joint
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local ground = world:createBody({})
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ground:setPosition(465, 480)
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--axisx, axisy values usually between 0 and 1
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--0 0 moves freely
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--0 1 moves on y axis
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--1 0 moves on x axis
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--1 1 moves on diagonal
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local jointDef = b2.createPrismaticJointDef(body, ground, 350, 100, 0.3, 1)
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local prismaticJoint = world:createJoint(jointDef)
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</syntaxhighlight>
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{|-
 
{|-
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| style="width: 50%;"|
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| style="width: 50%; vertical-align:top;"|
 
=== Methods ===
 
=== Methods ===
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[[b2.PrismaticJoint:enableLimit]] - enables or disables the joint limit<br/>
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[[Special:MyLanguage/b2.PrismaticJoint:enableLimit|b2.PrismaticJoint:enableLimit]] ''enables or disables the joint limit''<br/><!-- GIDEROSMTD:b2.PrismaticJoint:enableLimit(flag) enables or disables the joint limit -->
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[[b2.PrismaticJoint:enableMotor]] - enables or disables the joint motor<br/>
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[[Special:MyLanguage/b2.PrismaticJoint:enableMotor|b2.PrismaticJoint:enableMotor]] ''enables or disables the joint motor''<br/><!-- GIDEROSMTD:b2.PrismaticJoint:enableMotor(flag) enables or disables the joint motor -->
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[[b2.PrismaticJoint:getJointSpeed]] - returns the current joint translation speed in meters per second<br/>
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[[Special:MyLanguage/b2.PrismaticJoint:getJointSpeed|b2.PrismaticJoint:getJointSpeed]] ''returns the current joint translation speed in meters per second''<br/><!-- GIDEROSMTD:b2.PrismaticJoint:getJointSpeed() returns the current joint translation speed in meters per second -->
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[[b2.PrismaticJoint:getJointTranslation]] - returns the current joint translation in meters<br/>
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[[Special:MyLanguage/b2.PrismaticJoint:getJointTranslation|b2.PrismaticJoint:getJointTranslation]] ''returns the current joint translation in meters''<br/><!-- GIDEROSMTD:b2.PrismaticJoint:getJointTranslation() returns the current joint translation in meters -->
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[[b2.PrismaticJoint:getLimits]] - returns the lower and upper joint limits in meters<br/>
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[[Special:MyLanguage/b2.PrismaticJoint:getLimits|b2.PrismaticJoint:getLimits]] ''returns the lower and upper joint limits in meters''<br/><!-- GIDEROSMTD:b2.PrismaticJoint:getLimits() returns the lower and upper joint limits in meters -->
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[[b2.PrismaticJoint:getMotorSpeed]] - returns the motor speed in meters per second<br/>
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[[Special:MyLanguage/b2.PrismaticJoint:getMotorForce|b2.PrismaticJoint:getMotorForce]] ''returns the current motor force given the inverse time step''<br/><!-- GIDEROSMTD:b2.PrismaticJoint:getMotorForce(inv_dt) returns the current motor force given the inverse time step -->
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[[b2.PrismaticJoint:isLimitEnabled]] - is the joint limit enabled?<br/>
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[[Special:MyLanguage/b2.PrismaticJoint:getMotorSpeed|b2.PrismaticJoint:getMotorSpeed]] ''returns the motor speed in meters per second''<br/><!-- GIDEROSMTD:b2.PrismaticJoint:getMotorSpeed() returns the motor speed in meters per second -->
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[[b2.PrismaticJoint:isMotorEnabled]] - is the joint motor enabled?<br/>
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[[Special:MyLanguage/b2.PrismaticJoint:isLimitEnabled|b2.PrismaticJoint:isLimitEnabled]] ''is the joint limit enabled?''<br/><!-- GIDEROSMTD:b2.PrismaticJoint:isLimitEnabled() is the joint limit enabled? -->
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[[b2.PrismaticJoint:setLimits]] - sets the joint limits in meters<br/>
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[[Special:MyLanguage/b2.PrismaticJoint:isMotorEnabled|b2.PrismaticJoint:isMotorEnabled]] ''is the joint motor enabled?''<br/><!-- GIDEROSMTD:b2.PrismaticJoint:isMotorEnabled() is the joint motor enabled? -->
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[[b2.PrismaticJoint:setMaxMotorForce]] - sets the maximum motor force in N<br/>
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[[Special:MyLanguage/b2.PrismaticJoint:setLimits|b2.PrismaticJoint:setLimits]] ''sets the joint limits in meters''<br/><!-- GIDEROSMTD:b2.PrismaticJoint:setLimits(lower,upper) sets the joint limits in meters -->
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[[b2.PrismaticJoint:setMotorSpeed]] - sets the motor speed in meters per second<br/>
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[[Special:MyLanguage/b2.PrismaticJoint:setMaxMotorForce|b2.PrismaticJoint:setMaxMotorForce]] ''sets the maximum motor force in N''<br/><!-- GIDEROSMTD:b2.PrismaticJoint:setMaxMotorForce(force) sets the maximum motor force in N -->
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[[b2.RevoluteJoint:getMotorForce]] - returns the current motor force given the inverse time step<br/>
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[[Special:MyLanguage/b2.PrismaticJoint:setMotorSpeed|b2.PrismaticJoint:setMotorSpeed]] ''sets the motor speed in meters per second''<br/><!-- GIDEROSMTD:b2.PrismaticJoint:setMotorSpeed(speed) sets the motor speed in meters per second -->
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| style="width: 50%;"|
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| style="width: 50%; vertical-align:top;"|
 
=== Events ===
 
=== Events ===
 
=== Constants ===
 
=== Constants ===
 
|}
 
|}
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----
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*'''[[B2.Joint]]'''
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*'''[[LiquidFun]]'''

Latest revision as of 17:54, 12 July 2023


Supported platforms: Platform android.pngPlatform ios.pngPlatform mac.pngPlatform pc.pngPlatform html5.pngPlatform winrt.pngPlatform win32.png
Available since: Gideros 2011.6
Inherits from: b2.Joint

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:getMotorForce returns the current motor force given the inverse time step
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

Events

Constants

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