B2.DistanceJoint:setFrequency
Available since: Gideros 2011.6
Class: b2.DistanceJoint
Description
Sets the mass-spring-damper frequency in Hertz, that is the speed of oscillation also known as the harmonic motion. <syntaxhighlight lang="lua"> b2.DistanceJoint:setFrequency(frequency) </source>
For a rigid distance joint you would set the frequency equals to 0 and the damping equals to 1.
Parameters
frequency: (number) the mass-spring-damper frequency in Hertz (usually between 1 and 5)
Example
This is some code from an actual game ;-) <syntaxhighlight lang="lua"> self.body.ground = self.world:createBody({}) if g_currentlevel == 1 then self.body.ground:setPosition(xposx, xposy) local jointDef = b2.createDistanceJointDef(self.body.ground, self.body, xposx, xposy - 128, xposx, xposy) self.body.joint = self.world:createJoint(jointDef) self.body.joint:setDampingRatio(0.5) self.body.joint:setFrequency(1.2) end </source>
