A fixture definition is used to create a fixture. This class defines an abstract fixture definition. You can reuse fixture definitions safely.
The constructor sets the default fixture definition values.
The density, usually in kg/m^2.
Contact filtering data.
The friction coefficient, usually in the range [0,1].
A sensor shape collects contact information but never generates a collision response.
The restitution (elasticity) usually in the range [0,1].
The shape, this must be set. The shape will be cloned, so you can create the shape on the stack.
Use this to store application specific fixture data.