| 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 start-angle
length-angle
*

Erases (i.e. replaces with the background color or texture) the
specified filled ellipse-sector from *stream*. An
ellipse-sector is an ellipse-arc with the endpoints of the arc
connected to the center of the ellipse, like a piece of an elliptical
pie.

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 **fill-ellipse-sector** which
draws the filled ellipse-sector 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 |