Sketcher BSplineInsertKnot

Description
Insert a knot into an existing B-spline (See this page for more info about B-splines). If a knot already exists at the specified parameter, increases the multiplicity of that knot by one.

Usage

 * 1) Select a B-spline, then either:
 * 2) * Press the button.
 * 3) * Use the menu.
 * 4) Enter the parameter for the new knot. The existing knots and their multiplicities are provided for reference.
 * 5) (Optionally) Use Sketcher_BSplineIncreaseKnotMultiplicity.svg Increase knot multiplicity if a knot with a higher multiplicity is desired.