Part TopoShape/de

Einleitung

Eine Part TopoForm, oder formal eine Part::TopoShape, ist eine Klasse, die eine parametrische 'topologische Form in der Software definiert. Objekte im Dokument, die etwas in der 3D Ansicht zeigen, haben normalerweise eine TopoForm.

Die topologischen Formen sowie deren Methoden werden durch den OpenCASCADE Technology Kernel (OCCT) definiert. FreeCAD verwendet diese Formen und baut Anwendung DokumentObjekte um sie herum.

Vereinfachtes Diagramm der Beziehungen zwischen den Kernobjekten im Programm. Die Klasse Part::TopoShape wird in das Part::Feature Objekt eingebettet und von dort aus an alle davon abgeleiteten Objekte verbreitet.

How to use

The Part TopoShape is an object that is assigned to some App DocumentObjects.

In particular, the basic object that handles these types of attributes is the Part Feature (Part::Feature class). All objects derived from this class will have access to a Part TopoShape.

Some of the most important objects with Part TopoShape are the following:

• Any primitive solid created with the Part Workbench.
• Any PartDesign Body and PartDesign Feature created with the PartDesign Workbench.
• Any object derived from Part Part2DObject, like most objects created with the Draft Workbench.
• Any sketch, that is, Sketcher SketchObject, created with the Sketcher Workbench.
• Any object created by importing a STEP, BREP, and similar solid format files.

Scripting

See also: FreeCAD Scripting Basics, and scripted objects.

All objects derived from Part::Feature will have a Part TopoShape, which is normally accessible from its Shape attribute.

import FreeCAD as App

doc = App.newDocument()
obj = App.ActiveDocument.addObject("Part::Box", "Box")
print(obj.Shape)

A TopoShape has many attributes (variables) and methods that contain information about it, and which allow doing operations with it. These variables and methods can be tested in the Python console.

print(obj.Shape.Area)
print(obj.Shape.BoundBox)
print(obj.Shape.CenterOfMass)
print(obj.Shape.ShapeType)

obj.Shape.check()
obj.Shape.copy()
obj.Shape.exportStep("my_file.step")
obj.Shape.exportStl("my_file.stl")

For a full list of attributes and methods, consult the source documentation, and the Std PythonHelp tool.

Part

• Primitives: Box, Cylinder, Sphere, Cone, Torus, Tube, Create primitives, Shape builder

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• Creation and modification: Extrude, Revolve, Mirror, Fillet, Chamfer, Make face from wires, Ruled Surface, Loft, Sweep, Section, Cross sections, 3D Offset, 2D Offset, Thickness, Projection on surface, Attachment

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• Boolean: Make compound, Explode Compound, Compound Filter, Boolean, Cut, Fuse, Common, Connect, Embed, Cutout, Boolean fragments, Slice apart, Slice, XOR

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• Measure: Measure Linear, Measure Angular, Measure Refresh, Clear All, Toggle All, Toggle 3D, Toggle Delta

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• Other tools: Import, Export, Box selection, Shape from Mesh, Points from mesh, Convert to solid, Reverse shapes, Create simple copy, Create transformed copy, Create shape element copy, Refine shape, Check geometry, Defeaturing, Appearance, Color per face

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