Spline Handles

A spline handle includes multiple handle types to control the weight and direction (vector) of the spline at that point.

Handle colors indicate the status of the operation.

Handles			Status	Results - the handle:
			Inactive	is not selected.
			Selected	was selected, but no motion has occurred.
			Active	was moved, and the operation is still in process.
			Activated	was moved and the operation is at rest in its new position.
			Constrained	includes constraining dimensions or relations.