Surface ExtendFace

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Sections
CurveOnMesh
Surface

Surface ExtendFace

Menu location
Surface → Extend face
Workbenches
Surface
Default shortcut
None
Introduced in version
0.17
See also
None

Description

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

Left: original face. Right: extended face.

Usage

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

Options

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

Properties

A Surface Extend object (Surface::Extend class) is derived from the basic Part Feature (Part::Feature class, through the Part::Spline 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

Base

View

Base

Scripting

See also: FreeCAD Scripting Basics.

The Surface Extend tool can be used in macros and from the Python console by adding the Surface::Extend object. 

import FreeCAD as App
import Draft

doc = App.newDocument()

a = App.Vector(-20, -20, 0)
b = App.Vector(-18, 25, 0)
c = App.Vector(60, 26, 0)
d = App.Vector(33, -20, 0)

points = [a, App.Vector(-20, -8, 0), b, c,
          App.Vector(37, 4, 0), d,
          App.Vector(-2, -18, 0), a]
obj = Draft.make_bspline(points)
doc.recompute()

if App.GuiUp:
    obj.ViewObject.Visibility = False

surf = doc.addObject("Surface::Filling", "Surface")
surf.BoundaryEdges = [(obj, "Edge1")]
doc.recompute()

# ---------------------------------------------------------
points_spl = [App.Vector(-10, 0, 2),
              App.Vector(4, 0, 7),
              App.Vector(18, 0, -5),
              App.Vector(25, 0, 0),
              App.Vector(30, 0, 0)]
aux_edge = Draft.make_bspline(points_spl)
doc.recompute()

surf.UnboundEdges = [(aux_edge, "Edge1")]
doc.recompute()

# ---------------------------------------------------------
surf_extended = doc.addObject("Surface::Extend", "Surface")
surf_extended.Face = [surf, "Face1"]
doc.recompute()


Sections
CurveOnMesh
Surface
Surface
User documentation