Part Ellipsoid

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.
 * 1) Switch to the [[Image:Workbench_Part.svg|24px]] Part Workbench
 * 2) Access the Ellipsoid command several ways:
 * 3) * Through the Create Primitives dialogue, pressing the [[Image:Part_Primitives.svg|32px]] Primitives button located in the Part toolbar
 * 4) * Using the entry in the Part menu

Example


A Part Ellipsoid object with the values of the bottom scripting example are shown here.

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)



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



 * By default the minor radius parallel to the Z-axis,
 * By default the major radius parallel to the XY plane, it is also the maximum radius of the circular cross section
 * By default the major radius parallel to the YZ plane, it is also the maximum radius of the angular cross section
 * Lower truncation of the ellipsoid, parallel to the circular cross section (-90 degrees in a full spheroid)
 * Upper truncation of the ellipsoid, parallel to the circular cross section (90 degrees in a full spheroid)
 * Angle of rotation of the elliptical cross section (360 degrees in a full spheroid)

Scripting
A Part Ellipsoid is created with the method of the document.


 * Where is the name for the object. The name must be unique for the entire document.
 * The function returns the newly created object.

The is the user editable name for the object. It can be easily changed by

You can access and modify attributes of the object. For example, you may wish to modify the three radii and the three angles of the ellipsoid.

The result will be a part of an ellipsoid.

You can change its placement and orientation with: