Phaser.Physics.P2.RotationalSpring = function (world, bodyA, bodyB, restAngle, stiffness, damping){ 
this.game = world.game; 
this.world = world; 
if (restAngle === undefined) { 
restAngle = null ; 
} 
if (stiffness === undefined) { 
stiffness = 100; 
} 
if (damping === undefined) { 
damping = 1; 
} 
if (restAngle) { 
restAngle = world.pxm(restAngle); 
} 
var options = { 
restAngle: restAngle,
stiffness: stiffness,
damping: damping}
; 
this.data = new p2.RotationalSpring(bodyA, bodyB, options); 
this.data.parent = this; 
} 
; 
Phaser.Physics.P2.Spring.prototype.constructor = Phaser.Physics.P2.Spring;