|fixture||the id of the bound fixture|
|friction||the new friction value to apply|
When you bind a fixture to an instance using physics_fixture_bind this
returns an "id" for the bound fixture. You can use this id to set
the friction value of the bound fixture, not the "base"
fixture, at any time using this function. Note that the friction is
usually set to a value between 0 and 1, but you can use any
non-negative value if required.
var fric = physics_get_friction(fix_id);
physics_set_friction(fix_id, fric + 0.1);
The code above gets the current friction value for the bound physics properties of the instance and then sets them to a different value.