| Allegro CL version 10.1Unrevised from 10.0 to 10.1. 10.0 version |

**Arguments: ***
stream center semi-major-axis
semi-minor-axis
semi-major-axis-angle
*

Erases ellipse from *stream*. The ellipse is defined by the center (a
position) and the two half-axes, lengths from the center to the
farthest point on the edge and to the nearest point on the edge,
called the semi-major-axis and the semi-minor-axis. (Technically, the
major axis should be longer than the minor axis but the two arguments
need not have that relationship.) Because the Windows ellipse drawer
can only draw ellipses that are vertically or horizontally oriented,
the *semi-major-axis-angle* argument must be a
multiple of 90. Other values will signal an error. The argument
specifies the angle between the semi-major-axis and a line parallel to
the x-axis passing through the *center*. Angles are
measured clockwise.

*center* should be a position (see **make-position**).
*stream* should be a `cg-stream`

.

Contrast with **draw-ellipse**, which
draws the ellipse on stream.

Copyright (c) 1998-2022, Franz Inc. Lafayette, CA., USA. All rights reserved.

This page was not revised from the 10.0 page.

Created 2019.8.20.

| Allegro CL version 10.1Unrevised from 10.0 to 10.1. 10.0 version |