Curves GordonSurface/de: Difference between revisions

From FreeCAD Documentation
(Created page with "==Hinweise==")
(Created page with "* Die Kurven jeder Gruppe (Rippen und Schienen/Profil- und Leitkurven) sollten alle Kurven der anderen Gruppe berühren. ** Mit anderen Worten: Sie müssen ein Gitter oder ein...")
Line 62: Line 62:
==Hinweise==
==Hinweise==


* Die Kurven jeder Gruppe (Rippen und Schienen/Profil- und Leitkurven) sollten alle Kurven der anderen Gruppe berühren.
* The curves of each group (ribs and rails) should touch all curves of the other group.
** Mit anderen Worten: Sie müssen ein Gitter oder eine Netzstruktur bilden, wie hier dargestellt:
** In other words, they must form a grid or net pattern as shown here:
[[File:grid.png|200px]]
[[File:grid.png|200px]]
* Im Normalfall wird die Flächennormale der resultierenden Gordon-Fläche durch die Richtung der Profilkurven (Rippen) bestimmt.
* In general, the surface normal of the resulting Gordon surface will be determined by the direction of the ribs.
In diesem Beispiel, der Fläche auf der linken Seite, wurden die Leitkurven (Schienen) von +Y nach -Y gezogen und die resultierende Flächennormale zeigt in Richtung +Z
In this example, the surface on the left, the rails were drawn from +Y to -Y and the resulting surface normal is +Z
<br>
<br>
Auf der rechten Seite wurden die Leitkurven (Schienen) von -Y nach +Y gezogen und die resultierende Flächennormale zeigt in Richtung -Z.
On the right, the ribs are drawn from -Y to +Y, resulting in the surface normal oriented -Z.


[[File:Normals shown.png|600px]]
[[File:Normals shown.png|600px]]

Revision as of 14:18, 20 November 2022

Other languages:

Curves GordonSurface

Menu location
Surfaces → Gordon surface
Workbenches
Curves
Default shortcut
None
Introduced in version
-
See also
None

Beschreibung

The Curves GordonSurface creates a surface that skins a network of curves. This tool is part of the external workbench called Curves.

Anwendung

  1. A Gordon surface requires a network of lines or curves that create a support network for the surface.
    • The surface will be "tented" between and over these lines.
  2. In the example above the blue lines (or ribs) represent the shape of the surface at different points along surface.
    • These can be thought of as cross sections along the surface. Or, like supports that the surface will "tent" over.
  3. The yellow lines represent the extent and shape of the surface between the cross sections ("ribs") defined by the blue lines.
  4. These lines (blue & yellow) can be created in sketches.
    • The sketches containing the blue ribs would typically have a placement offset.
      • Each "rib" is in a separate sketch.
    • The sketches containing the extent/shape (yellow) lines will typically reference external geometry from the "rib" sketches for accurate positioning.
  5. These need to be created before the next step.
  6. Switch to the Curves workbench (install from Addon Manager is necessary, if not previously installed)
  7. Now select all the lines of that will define the surface.
  8. The order of selection defines the stitching or tenting order.
  9. Use multi-select to select all lines defining the surface. (Left click while holding the Ctrl key.)
  10. Select the ribs first, in order. (In the example above, select the blue lines from left to right. or right to left.)
  11. Continue to hold the Ctrl key and select the extent lines. (Yellow lines in the example above.)
  12. To invoke the command, do one of the following:
    • Press the button
    • Use the Surfaces → Gordon surface

Eigenschaften

  • DatenPlacement: Can be used to adjust the placement of the resulting Gordon surface. See: Placement
    • Note: The Placement properties do not adjust the placement of the curves/lines used to create the surface, only the surface.
  • DatenLabel: User specified label (name) for the surface. (Default: Gordon)
  • DatenOutput: Defines the output type. (Default: Surface, Options: Surface, Wireframe)
  • DatenGordon>Max Ctrl Pts: (Default: 80)
  • DatenGordon>Sources: User selected lines that are used to create the Gordon surface.
  • DatenGordon>Tol3D: 3D tolerance (Default: 0.01)
  • DatenWireframe>Samples U: Number of samples in the U direction. (Default: 16)
    • This value is used to determine density of the mesh when the Output property is set to Wireframe.
  • DatenWireframe>Samples V: Number of samples in the V direction. (Default: 16)
    • This value is used to determine density of the mesh when the Output property is set to Wireframe.
    • Gordon surface in wire frame mode, U=16, V=16

Hinweise

  • Die Kurven jeder Gruppe (Rippen und Schienen/Profil- und Leitkurven) sollten alle Kurven der anderen Gruppe berühren.
    • Mit anderen Worten: Sie müssen ein Gitter oder eine Netzstruktur bilden, wie hier dargestellt:

  • Im Normalfall wird die Flächennormale der resultierenden Gordon-Fläche durch die Richtung der Profilkurven (Rippen) bestimmt.

In diesem Beispiel, der Fläche auf der linken Seite, wurden die Leitkurven (Schienen) von +Y nach -Y gezogen und die resultierende Flächennormale zeigt in Richtung +Z
Auf der rechten Seite wurden die Leitkurven (Schienen) von -Y nach +Y gezogen und die resultierende Flächennormale zeigt in Richtung -Z.

  • Part Extrude can be used to create a solid from the surface.
  • PartDesign Pad can also create a solid from the surface. Dragging the surface into a Body creates a Base Feature that can then be padded.

Limitations

TODO

Scripting