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From: cunniff@hpfcso.FC.HP.COM (Ross Cunniff)
Newsgroups: comp.lang.postscript
Subject: Re: Flattenpath (was letter height)
Message-ID: <7090002@hpfcso.FC.HP.COM>
Date: 29 May 91 14:59:20 GMT
References: <91148.135401CXT105@psuvm.psu.edu>
Organization: Hewlett-Packard, Fort Collins, CO, USA
Lines: 23

In article <16154@life.ai.mit.edu> bkph@rice-chex.ai.mit.edu
(Berthold K.P. Horn) writes:

> If you don't execute flattenpath before pathbox, you will get a bounding
> box for the knots and control points of the path, not of the pat itself.
> The bounding box may be larger than that of the character outline as a
> result of the fact that the control points do not lie on the path.

True.

> Conversely, the bounding box of the knots and control points may be smaller
> then that of the character because a part of the outline may `bulge out'
> betwen control points.

Not true.  The control points of a Bezier spline are on or outside the convex
hull of the curve; i.e. the curve cannot extend 'outside' the polygon
defined by the control points.  Just a minor nit :-)

> Berthold.

				Ross Cunniff
				Hewlett-Packard Colorado Language Lab
				cunniff@hpfcla.HP.COM