On Fri, Oct 15, 2010 at 11:49:11AM -0700, joe tarantino wrote: > ...and pcb is the only CAD program I know of, that does like this > I've run across other PC layout tools which do this. Mechanical CAD > tools usually have (by default) Y+ pointing up, but for some reason PC > design tools occasionally have Y+ facing down. I don't remember any of > these tools justifying their (less common) choice of convention > however. :) >
The reason for it is that this is generally how drawing canvases work, so from a programmer's perspective, it is simpler to have y pointing down. I remember learning to draw function graphs in grade school, and being surprised that y went up because I had used QBASIC for many years before that. Afterwards, I had to remember to put -y everywhere when using Qbasic as a graphing calculator. -- Andrew Poelstra Email: asp11 at sfu.ca OR apoelstra at wpsoftware.net Web: http://www.wpsoftware.net/andrew/ _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
