Interpolates along a sequence of points.
Move as close as possible to the specified point.
Move to the specified segment and move a fraction of the way to the next segment.
Set the path to interpolate along.
Traversed distance from the start of the path.
Last point in the path.
Remaining distance until the end of the path.
Tangent of the curve at the current position.
True if this instance has a path set.