Sketcher CreateBSpline/zh-cn

Description
This tool creates a B-spline curve from its control points. (See this page for more info about B-splines.)



Usage

 * 1) Press the  button.
 * 2) Create a series of points by clicking in the 3D view. While the command is active, the created points are connected with straight lines, and a construction circle is created centered on each point.
 * 3) Optionally press  before terminating the input to define the degree of the B-spline.
 * 4) Optionally press  before terminating the input to delete the last created control point.
 * 5) Right-click to terminate the input and generate the curve.
 * 6) Depending on preferences, the tool may remain active to trace a new curve. Right-click again to exit the command.

Limitations

 * Many types of constraints are not supported at this time.
 * The Extend tool is not supported.
 * : The Split tool is not supported.
 * : The shape of a B-spline curve can only be edited by dragging one of the control points. The knots lying on the curve cannot be selected.