App GeoFeature
Einleitung
Ein App-GeoFeature-Objekt, oder formal ein App::GeoFeature
, ist die Basisklasse der meisten Objekte, die geometrische Elemente in der 3D-Ansicht anzeigen, da es eine Daten-EigenschaftPlacement enthält.
Vereinfachtes Diagramm der Beziehungen zwischen den Kernobjekten in FreeCAD
Anwendung
Das App-GeoFeature ist ein internes Objekt; es kann daher nicht von der grafischen Oberfläche aus erstellt werden. Es ist generell nicht dafür vorgesehen, direkt eingesetzt zu werden, eher zum Ableiten einer Unterklasse für ein nacktes Objekt, das nur eine grundlegende Daten-EigenschaftPlacement enthält, die seine Position in der 3D-Ansicht festlegt.
Einige der wichtigsten abgeleiteten Objekte sind folgende:
- Die Part-Formelement-Klasse (Part Feature class), übergeordnete Klasse der meisten Objekte mit 2D und 3D TopoFormen.
- Die Mesh-Formelement-Klasse (Mesh Feature class), übergeordnete Klasse der meisten von Netzobjekten abgeleiteten Objekte; keine Festkörper.
- Die FEM-Netzobjekt-Klasse (FEM FemMeshObject class), übergeordnete Klasse der FEM-Netze, die mit dem Arbeitsbereich FEM erstellt wurden.
- Die CAM-Element-Klasse (CAM Feature class), übergeordnete Klasse der Werkzeugbahnen (paths), die mit dem Arbeitsbereich CAM für CNC-Bearbeitungen erstellt wurden.
- Die App-Part-Klasse (App Part class), die Std-Parts definiert, die als Behälter von Körpern eingesetzt werden, um Baugruppen zusammenzustellen.
When creating this object in Python, instead of sub-classing App::GeoFeature
, you should sub-class App::GeometryPython
because the latter includes a default view provider, and Proxy
attributes for the object itself, and its view provider. See Scripting.
Properties App GeoFeature
See Property for all property types that scripted objects can have.
The App GeoFeature (App::GeoFeature
class) is derived from the basic App DocumentObject (App::DocumentObject
class) and inherits all its properties. In addition it has a DatenPlacement property, which controls its position in the 3D view.
Properties App GeometryPython
See Property for all property types that scripted objects can have.
The App GeometryPython (App::GeometryPython
class) is derived from the basic App GeoFeature (App::GeoFeature
class) and inherits all its properties. It also has several additional properties.
These are the properties available in the property editor. Hidden properties can be shown by using the Show all command in the context menu of the property editor.
Data
Base
- Daten (Hidden)Proxy (
PythonObject
): a custom class associated with this object. - DatenPlacement (
Placement
): the position of the object in the 3D view. The placement is defined by aBase
point (vector), and aRotation
(axis and angle). See Placement.- DatenAngle: the angle of rotation around the DatenAxis. By default, it is
0°
(zero degrees). - DatenAxis: the unit vector that defines the axis of rotation for the placement. Each component is a floating point value between
0
and1
. If any value is above1
, the vector is normalized so that the magnitude of the vector is1
. By default, it is the positive Z axis,(0, 0, 1)
. - DatenPosition: a vector with the 3D coordinates of the base point. By default, it is the origin
(0, 0, 0)
.
- DatenAngle: the angle of rotation around the DatenAxis. By default, it is
- DatenLabel (
String
): the user editable name of this object, it is an arbitrary UTF8 string. - Daten (Hidden)Label2 (
String
): a longer, user editable description of this object, it is an arbitrary UTF8 string that may include newlines. By default, it is an empty string""
. - Daten (Hidden)Expression Engine (
ExpressionEngine
): a list of expressions. By default, it is empty[]
. - Daten (Hidden)Visibility (
Bool
): whether to display the object or not.
View
Base
- Ansicht (Hidden)Proxy (
PythonObject
): a custom viewprovider class associated with this object.
Display Options
- AnsichtBounding Box (
Bool
): if it istrue
, the object will show the bounding box in the 3D view. - AnsichtDisplay Mode (
Enumeration
): see the information in App FeaturePython. - AnsichtShow In Tree (
Bool
): see the information in App FeaturePython. - AnsichtVisibility (
Bool
): see the information in App FeaturePython.
Object Style
- AnsichtShape Color (
Color
): a tuple of three floating point RGB values(r,g,b)
to define the color of the faces in the 3D view; by default it is(0.8, 0.8, 0.8)
, which is displayed as[204, 204, 204]
on base 255, a light gray . - Ansicht (Hidden)Shape Material (
Material
): an App Material associated with this object. By default it is empty. - AnsichtTransparency (
Percent
): an integer from0
to100
that determines the level of transparency of the faces in the 3D view. A value of100
indicates completely invisible faces; the faces are invisible but they can still be picked as long as AnsichtSelectable istrue
.
Selection
- AnsichtOn Top When Selected (
Enumeration
): see the information in App FeaturePython. - AnsichtSelectable (
Bool
): if it istrue
, the object can be picked with the pointer in the 3D view. Otherwise, the object cannot be selected until this option is set totrue
. - AnsichtSelection Style (
Enumeration
): see the information in App FeaturePython.
Scripting
See also: FreeCAD Scripting Basics and scripted objects.
See Part Feature for the general information on adding objects to the document.
A GeoFeature is created with the addObject()
method of the document. If you would like to create an object with a 2D or 3D topological shape, it may be better to create one of the sub-classes specialized for handling shapes, for example Part Feature or Part Part2DObject.
import FreeCAD as App
doc = App.newDocument()
obj = App.ActiveDocument.addObject("App::GeoFeature", "Name")
obj.Label = "Custom label"
For Python subclassing you should create the App::GeometryPython
object.
import FreeCAD as App
doc = App.newDocument()
obj = App.ActiveDocument.addObject("App::GeometryPython", "Name")
obj.Label = "Custom label"
- Core: App DocumentObject
- Basic: App FeaturePython, App GeoFeature, Part Feature, Mesh Feature, Fem FemMeshObject
- Internal shapes: Part TopoShape, Mesh MeshObject, Fem FemMesh
- Structure: App DocumentObjectGroup (Std Group), App Part (Std Part), App Link (Std LinkMake)
- Derived: Part Part2DObject, Sketcher SketchObject, PartDesign Body, PartDesign Feature
- Erste Schritte
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