Difference between revisions of "B2.PulleyJoint"

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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'''Available since:''' Gideros 2011.6<br/>
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<!-- GIDEROSOBJ:b2.PulleyJoint -->
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'''<translate>Supported platforms</translate>:''' [[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/>
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'''<translate>Available since</translate>:''' Gideros 2011.6<br/>
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'''<translate>Inherits from</translate>:''' [[Special:MyLanguage/b2.Joint|b2.Joint]]<br/>
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=== <translate>Description</translate> ===
 
=== <translate>Description</translate> ===
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<translate><br />
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The pulley joint is connected to two bodies and two fixed ground points. The pulley supports a ratio such that: length1  ratio * length2 <= constant Yes, the force transmitted is scaled by the ratio. The pulley also enforces a maximum length limit on both sides. This is useful to prevent one side of the pulley hitting the top.
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The pulley joint is connected to two bodies and two fixed ground points. The pulley supports a ratio such that: length1  ratio * length2 &lt;= constant Yes, the force transmitted is scaled by the ratio. The pulley also enforces a maximum length limit on both sides. This is useful to prevent one side of the pulley hitting the top. <br />
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<br /></translate>
 
 
=== <translate>Examples</translate> ===
 
=== <translate>Examples</translate> ===
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'''Pulley joint'''<br/>
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'''Pulley joint'''
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<source lang="lua">--create empty box2d body for joint
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<syntaxhighlight lang="lua">
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--create empty box2d body for joint
 
local ground = world:createBody({})
 
local ground = world:createBody({})
  
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350, 300, --coordinates where "imaginary string" is attached in the body 2
 
350, 300, --coordinates where "imaginary string" is attached in the body 2
 
1) -- ratio (if < 1 -> makes body 2 heavier, > 1 makes body 1 heavier, =1 makes them equal
 
1) -- ratio (if < 1 -> makes body 2 heavier, > 1 makes body 1 heavier, =1 makes them equal
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local pulleyJoint = world:createJoint(jointDef)</source>
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local pulleyJoint = world:createJoint(jointDef)
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</syntaxhighlight>
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{|-
 
{|-
 
| style="width: 50%; vertical-align:top;"|
 
| style="width: 50%; vertical-align:top;"|
 
=== <translate>Methods</translate> ===
 
=== <translate>Methods</translate> ===
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[[Special:MyLanguage/b2.PulleyJoint:getGroundAnchorA|b2.PulleyJoint:getGroundAnchorA]] ''<translate>returns the x and y coordinates of the first ground anchor</translate>''<br/>
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[[Special:MyLanguage/b2.PulleyJoint:getGroundAnchorA|b2.PulleyJoint:getGroundAnchorA]] ''<translate>returns the x and y coordinates of the first ground anchor</translate>''<br/><!-- GIDEROSMTD:b2.PulleyJoint:getGroundAnchorA() returns the x and y coordinates of the first ground anchor -->
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[[Special:MyLanguage/b2.PulleyJoint:getGroundAnchorB|b2.PulleyJoint:getGroundAnchorB]] ''<translate>returns the x and y coordinates of the second ground anchor</translate>''<br/>
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[[Special:MyLanguage/b2.PulleyJoint:getGroundAnchorB|b2.PulleyJoint:getGroundAnchorB]] ''<translate>returns the x and y coordinates of the second ground anchor</translate>''<br/><!-- GIDEROSMTD:b2.PulleyJoint:getGroundAnchorB() returns the x and y coordinates of the second ground anchor -->
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[[Special:MyLanguage/b2.PulleyJoint:getLengthA|b2.PulleyJoint:getLengthA]] ''<translate>returns the current length of the segment attached to bodyA</translate>''<br/>
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[[Special:MyLanguage/b2.PulleyJoint:getLengthA|b2.PulleyJoint:getLengthA]] ''<translate>returns the current length of the segment attached to bodyA</translate>''<br/><!-- GIDEROSMTD:b2.PulleyJoint:getLengthA() returns the current length of the segment attached to bodyA -->
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[[Special:MyLanguage/b2.PulleyJoint:getLengthB|b2.PulleyJoint:getLengthB]] ''<translate>returns the current length of the segment attached to bodyB</translate>''<br/>
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[[Special:MyLanguage/b2.PulleyJoint:getLengthB|b2.PulleyJoint:getLengthB]] ''<translate>returns the current length of the segment attached to bodyB</translate>''<br/><!-- GIDEROSMTD:b2.PulleyJoint:getLengthB() returns the current length of the segment attached to bodyB -->
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[[Special:MyLanguage/b2.PulleyJoint:getRatio|b2.PulleyJoint:getRatio]] ''<translate>returns the joint ratio</translate>''<br/>
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[[Special:MyLanguage/b2.PulleyJoint:getRatio|b2.PulleyJoint:getRatio]] ''<translate>returns the joint ratio</translate>''<br/><!-- GIDEROSMTD:b2.PulleyJoint:getRatio() returns the joint ratio -->
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| style="width: 50%; vertical-align:top;"|
 
| style="width: 50%; vertical-align:top;"|
 
=== <translate>Events</translate> ===
 
=== <translate>Events</translate> ===
 
=== <translate>Constants</translate> ===
 
=== <translate>Constants</translate> ===
 
|}
 
|}
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----
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*'''[[B2.Joint]]'''
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*'''[[LiquidFun]]'''

Latest revision as of 16:55, 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

The pulley joint is connected to two bodies and two fixed ground points. The pulley supports a ratio such that: length1 ratio * length2 <= constant Yes, the force transmitted is scaled by the ratio. The pulley also enforces a maximum length limit on both sides. This is useful to prevent one side of the pulley hitting the top.

Examples

Pulley joint 

--create empty box2d body for joint
local ground = world:createBody({})

local jointDef = b2.createPulleyJointDef(body1, body2, 
	200, 100, --coordinates where "imaginary string" is attached in the air for body 1
	350, 100, --coordinates where "imaginary string" is attached in the air for body 2
	200, 300, --coordinates where "imaginary string" is attached to the body 1
	350, 300, --coordinates where "imaginary string" is attached in the body 2
	1) -- ratio (if < 1 -> makes body 2 heavier, > 1 makes body 1 heavier, =1 makes them equal
local pulleyJoint = world:createJoint(jointDef)

Methods

b2.PulleyJoint:getGroundAnchorA returns the x and y coordinates of the first ground anchor
b2.PulleyJoint:getGroundAnchorB returns the x and y coordinates of the second ground anchor
b2.PulleyJoint:getLengthA returns the current length of the segment attached to bodyA
b2.PulleyJoint:getLengthB returns the current length of the segment attached to bodyB
b2.PulleyJoint:getRatio returns the joint ratio

Events

Constants

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