This function is relevant only when STATE_object_set_falling_from_track() is used.
It is not a very important function though if you are using STATE_object_set_falling_from_track()
you might want to take a look at it.
Lets imagine that we have a world that has some mountains. Our object is a car that
is following a square track in the air. We tell the engine by using STATE_object_set_falling_from_track()
to drop the car from the air to the ground so that the car drive in a square path on the terrain.
We can use this function to find out that the location of the object before the object was dropped.
See also STATE_object_set_falling_from_track()
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