the friction coefficient , usually in the range 0,1 . concode_field_sep Filter filter concode_elem_sep Object userData concode_elem_sep float restitution concode_elem_sep float density concode_elem_sep boolean isSensor concode_elem_sep Shape shape concode_elem_sep float friction concode_field_sep float getRestitution concode_elem_sep Shape getShape concode_elem_sep boolean isSensor concode_elem_sep float getDensity concode_elem_sep void setDensity concode_elem_sep void setShape concode_elem_sep void setFilter concode_elem_sep void setSensor concode_elem_sep Filter getFilter concode_elem_sep void setRestitution concode_elem_sep Object getUserData concode_elem_sep void setFriction concode_elem_sep void setUserData
float function ( ) { return friction ; }