Difference between revisions of "B2.DistanceJoint"

From GiderosMobile
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A distance joint constrains two points on two bodies to remain at a fixed distance from each other. You can view this as a massless, rigid rod. <br />
 
A distance joint constrains two points on two bodies to remain at a fixed distance from each other. You can view this as a massless, rigid rod. <br />
 
<br />
 
<br />
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=== Examples ===
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'''Distance joint'''<br/>
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<source lang="lua">local jointDef = b2.createDistanceJointDef(body1, body2, 100, 100, 200, 100)
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local distanceJoint = world:createJoint(jointDef)
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--by default length between two bodies is the length they have between them when joint was created
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--but it is possilbe to change it using
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distanceJoint:setLength(200)
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distanceJoint:setDampingRatio(0.5)
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distanceJoint:setFrequency(4)</source>
 
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Revision as of 11:40, 23 August 2018

Supported platforms: android, ios, mac, pc
Available since: Gideros 2011.6

Description


A distance joint constrains two points on two bodies to remain at a fixed distance from each other. You can view this as a massless, rigid rod.

Examples

Distance joint

local jointDef = b2.createDistanceJointDef(body1, body2, 100, 100, 200, 100)
local distanceJoint = world:createJoint(jointDef)
--by default length between two bodies is the length they have between them when joint was created
--but it is possilbe to change it using
distanceJoint:setLength(200)
distanceJoint:setDampingRatio(0.5)
distanceJoint:setFrequency(4)

Methods

b2.DistanceJoint:getDampingRatio - returns the damping ratio
b2.DistanceJoint:getFrequency - returns the mass-spring-damper frequency in Hertz
b2.DistanceJoint:getLength - returns the length of this distance joint in meters
b2.DistanceJoint:setDampingRatio - sets the damping ratio (0 = no damping, 1 = critical damping)
b2.DistanceJoint:setFrequency - sets the mass-spring-damper frequency in Hertz
b2.DistanceJoint:setLength - sets the natural joint length in meters

Events

Constants