Sketcher: Ellisse da centro

Ellisse
Posizione nel menu
Sketch → Geometrie → Create ellipse by center
Ambiente
Sketcher, Part Design
Avvio veloce
Nessuno
Introdotto nella versione
-
Vedere anche
Ellipse by 3 Points, Cerchio, Arco di ellisse

Description

This tool draws an ellipse by picking three points: the center, the end of major radius, the minor radius. When starting the tool, the mouse pointer changes to a white cross with a red ellipse icon. Besides are coordinates shown in real time.

The sequence of clicks is indicated by yellow arrows with numbers. C is the center, a - major diameter, b - minor diameter, F1, F2 are foci.

Usage

• Invoke the command by clicking a toolbar button, picking the menu item, or by using keyboard shortcut (needs to be assigned first in Interface Customization).
• First click in 3D view sets ellipse center. Second click sets the first radius and orientation of the ellipse. Third click sets the other radius (the distance from the line defined by first two clicks is the second radius).
• After the third click, the ellipse is created, together with a set of construction geometry aligned to it (major diameter, minor diameter, two foci). The construction geometry can be manually deleted if not needed, and recreated later. See Internal Alignment Constraint and Sketcher Show Hide Internal Geometry.
• Pressing ESC or clicking the right mouse button cancels the function.

Version

Introduced in FreeCAD v0.15.4309