Surface Filling - Riempimento di superficie

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Fill boundary curves

Surface

Posizione nel menu
Surface Filling
Surface → Riempimento...
Ambiente
Surface
Avvio veloce
Nessuno
Introdotto nella versione
-
Vedere anche
Nessuno

Descrizione

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.

Esempio di una superficie riempita, delimitata da quattro spigoli situati nel piano XY; (a sinistra) solo i quattro bordi e (a destra) una curva aggiunta nello spazio che definisce la curvatura della superficie

Utilizzo

Premere il pulsante Filling... dal menu Surface.
Passaggi determinati dalle esigenze.
Impostare le opzioni e premere 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.

Opzioni

Inside the Filling section.
- Add edge: press once to start picking edges in the 3D view. Individual lines such as Draft BSplines and Sketcher BSplines can be chosen, as well as any edge from solid objects, like those of PartDesign Bodies and Part Primitives.
- Remove edge: press once to start picking edges in the 3D view; these must be edges that were previously picked with Add edge.
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.

Proprietà

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

DatiProperty: description of the property
VistaProperty: description of the property

View

Base

VistaControl 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()