applyGravity : boolean Enable to automatically apply gravity each step. Source
gravity : Phaser.Physics.P2.Inv
createContactMaterial(materialA, materialB, options)
friction : number Friction between colliding bodies. This value is used if no matching ContactMaterial is found for a Material
toJSON() → {object} Converts the current world into a JSON object. Returns
removeConstraint(constraint) → {Phaser.Physics.P2.Constraint} Removes a Constraint from the world
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