A Part Part2DObject, or formally a Part::Part2DObject
, is a simple element with a topological shape that can be displayed in the 3D view.
The Part::Part2DObject
is derived from the Part Feature, but is specialized for 2D geometry, given that its shape will lie on a plane. This plane is defined by its DadosPlacement property (position, normal, and rotation). However, the plane can also be defined by supporting geometrical elements, such as the plane created by three arbitrary vertices, or a face of a solid body.
Simplified diagram of the relationships between the core objects in FreeCAD
The Part Part2DObject is an internal object, so it cannot be created from the graphical interface, only from the Python console as described in the Scripting section.
The Part::Part2DObject
is defined in the Part Workbench but can be used as the base class for scripted objects in all workbenches that produce 2D geometrical shapes. For example, it is the base object for sketches (Sketcher SketchObject), and for most objects created with the Draft Workbench.
Workbenches can add more properties to this basic element to produce an object with complex behavior.
See Property for all property types that scripted objects can have.
The Part Part2DObject (Part::Part2DObject
class) is derived from the Part Feature (Part::Feature
class) and inherits all its properties.
The Part Part2DObject also has the following additional properties in the property editor. Hidden properties can be shown by using the Show all command in the context menu of the property editor.
Attachment
String
): class name of the attach engine object driving the attachment. It defaults to Attacher::AttachEnginePlane
.LinkSubList
): it is the plane or face supporting the 2D geometry. It defaults to an empty list []
.Enumeration
): Deactivated
by default. This property determines a plane which the object will use as reference for 2D geometry. Clicking on the ellipsis ... (three dots), to the right of the entry field starts the Part EditAttachment command that allows selecting the supporting plane by picking different elements in the 3D view. The different modes are: Deactivated
, Translate origin
, Object's XY
, Object's XZ
, Object's YZ
, Plane face
, Tangent to surface
, Normal to edge
, Frenet NB
, Frenet TN
, Frenet TB
, Concentric
, Revolution section
, Plane by 3 points
, Normal to 3 points
, Folding
, Inertia 2-3
, Align O-N-X
, Align O-N-Y
, Align O-X-Y
, Align O-X-N
, Align O-Y-N
, Align O-Y-X
.Bool
): it defaults to false
; if it is true
the Z direction will be reversed. For example, a sketch will be flipped upside down. Hidden if DadosMap Mode is Deactivated
.Float
): sets point of curve to map a sketch to. It goes from 0
to 1
, which corresponds to the start
and end
. It defaults to 0
.Placement
): the position of the object in the 3D view, with respect to the attachment object's placement. The placement is defined by a Base
point (vector), and a Rotation
(axis and angle). See Placement. Hidden if DadosMap Mode is Deactivated
.See also: FreeCAD Scripting Basics and scripted objects.
See Part Feature for the general information on adding objects to the document.
A Part2DObject is created with the addObject()
method of the document.
import FreeCAD as App
doc = App.newDocument()
obj = App.ActiveDocument.addObject("Part::Part2DObject", "Name")
obj.Label = "Custom label"
For Python subclassing you should create a Part::Part2DObjectPython
object.
import FreeCAD as App
doc = App.newDocument()
obj = App.ActiveDocument.addObject("Part::Part2DObjectPython", "Name")
obj.Label = "Custom label"