[fa.laser-lovers] ImPress ellipses

laser-lovers@uw-beaver.UUCP (05/17/84)

From: John R Ellis <Ellis@YALE.ARPA>
Has anyone used the ImPress commands for drawing ellipses and ellipse
arcs?  If so, I'd like to hear about your experiences, software, etc.
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laser-lovers@uw-beaver (laser-lovers) (05/20/84)

From: Ram%umass-boston.csnet@csnet-relay.arpa
seem to work fine.  The somewhat trivial drawback is the requirement that
they have centers on a pixel.  My preference is to specify major and minor axes
so that axes of all, not just odd, number of pixels, can be given.  On the other
hand, I am not yet sure the error is consequential.  In our application we
tend to have curves >=3 pixels wide, so even a tangent to an ellipse which missed
by 1 pixel might not show.

Current versions of Impress give up too easily when they can not put the whole 
path on the page, but Imagen will be fixing this they tell me.  They seem as a
whole to do better graphics than any other real printer.

Bob Morris
Umass Boston
and Interleaf, Inc.