PROGRAMMING ISSUES: symbol x, y coordinates in sign, ranges

Tomáš Klapka Tomas.Klapka at RUCE.CZ
Mon Jun 27 13:00:54 UTC 2005


I am interested what is your opinion about x and y coordinates of the 
symbol in a sign.

This information has to be saved with symbols to specify how to render 
the sign.

Now there is raster data (PNG) used in SignPuddle and there was raster 
data used in SignWriter DOS.
It was static and there was no problem to specify coordinates, because 
it is in pixels or any other static measure.

But we all feel need of vector data (SVG, OpenType) to have nice 
rendering in high zooms.

There we cannot say that a symbol has for example x = 10 pixels and y = 
30 pixels.
If you zoom it, those coordinates has to be changed. So there must be 
relative coordinates.

What range of x and y coordinates should be used?

IMHO -127 to 127 could be enough.

What do you think?


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