Surface ExtendFace

Description
extrapolates an existing face or surface at its boundaries with its local U and V parameters.



Usage

 * 1) Make sure you have an object that has faces. The object could be created with the Workbench_Surface.svg Surface Workbench but it could also be any other object, for example, created with Workbench_Part.svg Part or Workbench_PartDesign.svg PartDesign.
 * 2) Select the face to extend by clicking on it on the 3D view.
 * 3) Press.

Options
This command doesn't have any options. Either it works with the selection or not.

Properties
A Surface Extend object ( class) is derived from the basic Part Feature ( class, through the subclass), therefore it shares all the latter's properties.

In addition to the properties described in Part Feature, the Surface Filling has the following properties in the property editor.

Data

 * : the subelement from an object that will be extended; it must be a face.
 * : it defaults to.


 * : it defaults to . The ratio of the local U parameter that will be extended in the negative direction.
 * : it defaults to . The ratio of the local U parameter that will be extended in the positive direction.
 * : it defaults to, in which case and  will have the same value.


 * : it defaults to . The ratio of the local V that will be extended in the negative direction.
 * : it defaults to . The ratio of the local V direction that will be extended in the positive direction.
 * : it defaults to, in which case and  will have the same value.


 * : it defaults to.
 * : it defaults to.

View

 * : it defaults to ; if set to, it will show an overlay with the control points of the surface.

Scripting
FreeCAD Scripting Basics.

The Surface Extend tool can be used in macros and from the Python console by adding the object.
 * The face to extend must be assigned as a LinkSub to the property of the object. It must contain only a single face.