Surface Filling

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Surface Filling

Menu location
Surface → Filling...
Workbenches
Surface
Default shortcut
None
Introduced in version
-
See also
None

Descriere

Surface Filling creates a surface from a series of connected boundary edges.

The surface can be modified by adding constraint edges and vertices which the surface must pass through.

Example of a filled surface, delimited by four edges located in the XY plane; (left) only the four edges, and (right) one additional curve in space that defines the curvature of the surface

Cum se folosește

  1. apăsați butonul Surface filling... button.
  2. Detalierea pașilor este necesară.
  3. Definiți opțiunile și apăsați OK.

The base edges that form the closed contour, as well as the auxiliary vertices and edges, can belong to 2D curves from Draft or the Sketcher, but can also belong to 3D solid objects such as those created with the Part or PartDesign Workbenches.

Opţiuni

  • Inside the Filling section.
  • Right mouse button: open the context menu and select Remove, or press Del in the keyboard, to remove the currently selected edge in the list.


  • Inside the Unbound Edges section similar Add edge and Remove edge buttons are available to pick supporting edges to control the curvature of the original surface.
  • Inside the Filling section similar Add vertex and Remove vertex buttons are available, in this case to pick supporting vertices.
  • Press Cancel or Esc to abort the current operation.

Proprietăți

A Surface Filling (Surface::Filling 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

Filling

  • DateProperty: descrierea proprietăților
  • VizualizareProperty: descrierea proprietăților

View

Base

  • VizualizareControl Points (Bool): it defaults to false; if set to true, it will show an overlay with the control points of the surface.

Scripting

See also: FreeCAD Scripting Basics.

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

  • The edges to be used to define the surface must be assigned as a LinkSubList to the BoundaryEdges property of the object.
  • Auxiliary edges and vertices must be assigned as a LinkSubLists to the UnboundEdges and Points properties of the object.
  • All objects with edges need to be computed before they can be used as input for the properties of the Filling 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)

points1 = [a, App.Vector(-20, -8, 0), App.Vector(-17, 7, 0), b]
obj1 = Draft.make_bspline(points1)

points2 = [b, App.Vector(0, 25, 0), c]
obj2 = Draft.make_bspline(points2)

points3 = [c, App.Vector(37, 4, 0), d]
obj3 = Draft.make_bspline(points3)

points4 = [d, App.Vector(-2, -18, 0), a]
obj4 = Draft.make_bspline(points4)
doc.recompute()

surf = doc.addObject("Surface::Filling", "Surface")
surf.BoundaryEdges = [(obj1, "Edge1"),
                      (obj2, "Edge1"),
                      (obj3, "Edge1"),
                      (obj4, "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()

# ---------------------------------------------------------
aux_v1 = Draft.make_line(App.Vector(-13, -12, 5),
                         App.Vector(-13, -12, -5))
aux_v2 = Draft.make_line(App.Vector(-3, 18, 5),
                         App.Vector(-3, 18, -5))
doc.recompute()

surf.Points = [(aux_v1, "Vertex2"),
               (aux_v2, "Vertex1")]
doc.recompute()