This plugin creates an ellipse based on parameter values.
It can also mark the location of each focus point, which would be fairly difficult using just the native SketchUp tools.
Download Ellipse 1.2
Ruby zipped (
This plugin is accessed from the Draw menu (Draw > Ellipse). This will open a dialog box to enter the ellipse parameter values.
The higher the edge count, the smoother the curve.
When you click OK, the ellipse is created as a component, and the component placement tool is activated to position the ellipse in the model.
The dialog box remembers the values between SketchUp sessions.