Surface FlächeErweitern
Surface ExtendFace |
Menu location |
---|
Surface → Extend face |
Workbenches |
Surface |
Default shortcut |
None |
Introduced in version |
0.17 |
See also |
None |
Beschreibung
Surface ExtendFace extrapolates an existing face or surface at its boundaries with its local U and V parameters.
Left: original face. Right: extended face.
Anwendung
- 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.
- Select the face to extend by clicking on it on the 3D view.
- Press Extend face.
Optionen
This command doesn't have any options. Either it works with the selection or not.
Eigenschaften
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.
Daten
Base
- DatenFace (
LinkSub
): the subelement from an object that will be extended; it must be a face. - DatenTolerance (
FloatConstraint
): it defaults to0.1
.
- DatenExtend UNeg (
FloatConstraint
): it defaults to0.05
. The ratio of the local U parameter that will be extended in the negative direction. - DatenExtend UPos (
FloatConstraint
): it defaults to0.05
. The ratio of the local U parameter that will be extended in the positive direction. - DatenExtend USymetric (
Bool
): it defaults totrue
, in which case DatenExtend UNeg and DatenExtend UPos will have the same value.
- DatenExtend VNeg (
FloatConstraint
): it defaults to0.05
. The ratio of the local V that will be extended in the negative direction. - DatenExtend VPos (
FloatConstraint
): it defaults to0.05
. The ratio of the local V direction that will be extended in the positive direction. - DatenExtend VSymetric (
Bool
): it defaults totrue
, in which case DatenExtend VNeg and DatenExtend VPos will have the same value.
- DatenSampleU (
IntegerConstraint
): it defaults to32
. - DatenSampleV (
IntegerConstraint
): it defaults to32
.
View
Base
- AnsichtControl Points (
Bool
): it defaults tofalse
; if set totrue
, it will show an overlay with the control points of the surface.
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.
- The face to extend must be assigned as a LinkSub to the
Face
property of the object. It must contain only a single face.
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()
Anwenderdokumentation
- Erste Schritte
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