GuiCommand: Name: Sketcher CreateArcOfEllipse MenuLocation: Sketch , Sketcher geometries , Create arc of ellipse Workbenches: Sketcher_Workbench Shortcut: G E A Version: 0.15 SeeAlso: Sketcher_CreateEllipseByCenter
Sketcher CreateArcOfEllipse
Description
The 
Sketcher CreateArcOfEllipse tool creates an arc of ellipse.
Arc of ellipse (white) with internal geometry (dark yellow)
Usage
See also: Drawing aids.
- There are several ways to invoke the tool:
- Press the Arc of ellipse by center, radius, endpoints button.
- Select the Sketcher → Sketcher geometries → Create arc of ellipse option from the menu.
- Use the keyboard shortcut: G then E, then A.
- Press the
- The cursor changes to a cross with the tool icon.
- Pick the center of the arc.
- Pick an endpoint of one of the axes of the arc, this also defines one of its radii.
- Pick the start point of the arc, this also defines the other radius of the arc.
- Pick the endpoint of the arc.
- The arc of ellipse is created, including a set of internal geometry (major axis, minor axis and two foci).
- If the tool runs in continue mode:
- Optionally keep creating arcs.
- To finish, right-click or press Esc, or start another geometry or constraint creation tool.
Notes
- Elements of the internal geometry can be deleted. They can be recreated at any time with Sketcher RestoreInternalAlignmentGeometry.
- Once created, the major and minor axes of an arc of ellipse are strict and cannot be swapped by resizing. This is a consequence of the solver parametrization and the same strict behavior of OpenCASCADE. An arc of ellipse must be rotated to swap its axes.
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This page is retrieved from https://github.com/FreeCAD/FreeCAD-documentation/blob/main/wiki/Sketcher_CreateArcOfEllipse.md