Part Ellipsoid
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|
Menu location |
---|
Part → Create primitives → Ellipsoid |
Workbenches |
Part, OpenSCAD |
Default shortcut |
None |
Introduced in version |
- |
See also |
Part Create primitives |
Description
The Part Ellipsoid command creates a parametric Ellipsoid solid.
The shape produced is limited in FreeCAD to being a solid (optionally truncated) spheroid, the shape you would create by rotating an ellipse around one of its axis. By default it is a Oblate Spheroid, the shape you would create by rotating an ellipse around its minor axis. The parameters can be changed to form a Prolate Spheroid.
The default spheroid in FreeCAD will have a circle for any cross section parallel to the XY plane. The cross section parallel to the other two planes will be an ellipse.
In mathematics, an Ellipsoid would have an elliptical cross section in all three planes.
Usage
A parametric Ellipsoid solid is available from the Create Primitives dialogue in the Part workbench.
- Switch to the
Part Workbench
- Access the Ellipsoid command several ways:
- Through the Create Primitives dialogue, pressing the
Primitives button located in the Part toolbar
- Using the Part → Create primitives → Ellipsoid entry in the Part menu
- Through the Create Primitives dialogue, pressing the
Properties
- Radius1, by default the minor radius parallel to the Z-axis,
- Radius2, by default the major radius parallel to the XY plane, it is also the maximum radius of the circular cross section
- Radius3, by default the major radius parallel to the YZ plane, it is also the maximum radius of the angular cross section
- Angle1, lower truncation of the ellipsoid, parallel to the circular cross section (-90 degrees in a full spheroid)
- Angle2, upper truncation of the ellipsoid, parallel to the circular cross section (90 degrees in a full spheroid)
- Angle3, angle of rotation of the elliptical cross section (360 degrees in a full spheroid)
Notes
Properties
See also: Property editor.
A Part Ellipsoid object is derived from a Part Feature object and inherits all its properties. It also has the following additional properties:
Data
Attachment
- DataSupport (
LinkList
): - DataMap Mode:
Base
Ellipsoid
- DataRadius1 (
Length
): By default the minor radius parallel to the Z-axis, - DataRadius2 (
Length
): By default the major radius parallel to the XY plane, it is also the maximum radius of the circular cross section - DataRadius3 (
Length
): By default the major radius parallel to the YZ plane, it is also the maximum radius of the angular cross section - DataAngle1 (
Angle
): Lower truncation of the ellipsoid, parallel to the circular cross section (-90 degrees in a full spheroid) - DataAngle2 (
Angle
): Upper truncation of the ellipsoid, parallel to the circular cross section (90 degrees in a full spheroid) - DataAngle3 (
Angle
): Angle of rotation of the elliptical cross section (360 degrees in a full spheroid)
Limitations
Scripting
A Part Ellipsoid is created with the addObject()
method of the document.
{{Code|code= ellipsoid = FreeCAD.ActiveDocument.addObject("Part::Ellipsoid", "myEllipsoid")
- Where
myBox
is the name for the object. The name must be unique for the entire document. - The function returns the newly created object.
The Label
is the user editable name for the object. It can be easily changed by
box.Label = "new myBoxName"
You can access and modify attributes of the box
object. For example, you may wish to modify the length, width and height parameters.
box.Length = 4
box.Width = 8
box.Height = 12
You can change its placement with:
box.Placement = FreeCAD.Placement(FreeCAD.Vector(1, 2, 3), FreeCAD.Rotation(75, 60, 30))
A Part Ellipsoid can be created with the following function:
ellipsoid = FreeCAD.ActiveDocument.addObject("Part::Ellipsoid", "myEllipsoid")
- Where
"myEllipsoid"
is the name for the object. - The function returns the newly created object.
You can access and modify attributes of the ellipsoid
object.
The name of the object can be easily changed by
ellipsoid.label = "new ellipsoidName"
For example, you may wish to modify the two radii and the three angles of the ellipsoid.
ellipsoid.Radius1 = 2
ellipsoid.Radius2 = 8
ellipsoid.Radius3 = 8
ellipsoid.Angle1 = -90
ellipsoid.Angle2 = 50
ellipsoid.Angle3 = 300
The result will be a part of an ellipsoid.
You can change its placement and orientation with:
ellipsoid.Placement = FreeCAD.Placement(FreeCAD.Vector(2, 4, 6), FreeCAD.Rotation(30, 45, 10))
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