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Re: SVG text flip-invariance

From: Dr. Olaf Hoffmann <Dr.O.Hoffmann@gmx.de>
Date: Tue, 7 Jul 2009 14:46:14 +0200
To: www-svg@w3.org, tim.edwards@multigig.com
Message-Id: <200907071446.14859.Dr.O.Hoffmann@gmx.de>
Why is scale=(-1,1) relevant for the text?
Does xcircuit have an x-axis from right to left?
For postscript this is not the case, it is from left
to right, bottom to top.

A simillar problem appears with graphical representations of functions,
data sets, statistical material etc
A program like grace caring about such data has a similar problem for
SVG output, because the y-axis of SVG points down (top to bottom). 
I think, they use a scale(1,-1) and some translations for the complete
set of graphical objects and use additionally a matrix transformation
on each text element (which can be decomposed again in a scale(1,-1)
and some other transformations of course).
Received on Tuesday, 7 July 2009 13:28:48 UTC

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