Module spatial 

Motion along spatial curves. A position keyframed with tangents travels along the cubic between keyframes by arc length, at the speed its timing curve sets.

Functions

motion_polyline

The motion path between keyframe values as a polyline with samples points per segment.

point_along

The point amount of the arc length along the cubic from from (control from + out_tangent) to to (control to + in_tangent), in a space scaled to screen proportions.