The AutoPhysics tool separates the animation into intervals with and without Fulcrum Points.
The fulcrum area is represented with a green line. This area can change during animation. Walking animation in particular makes a good example:
On intervals where both legs touch the ground the fulcrum area would be big. Then it shrinks and now only encases one foot.
The tool would also move the character to make their Center of Mass closer to the side which has a fulcrum area.
For the intervals where the character has no fulcrum points, the tool automatically generates ballistic.
To get a better understanding of how intervals with and without fulcrum points work, we can make a simple animation:
Next, we can make a bit of adjustment to the animation from the previous exercise.
Take the animation we made in the previous exercise.
Any point is considered a fulcrum point on a given interval, if it: