Hi all, Is this the same behaviour as in:
placing a "capacitor-2.sym" symbol, writing a PNG file, opening the PNG file with a viewer, and observing that the arc is drawn the wrong way around. Some details: gschem and friends 20060906 on a FC5 box. BTW: I do not like to send binaries (PNG) to the list so you have to see if you can reproduce this one yourself. Kind regards, Bert Timmerman. -----Oorspronkelijk bericht----- Van: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Namens Peter Clifton Verzonden: zaterdag 30 december 2006 19:59 Aan: gEDA developer mailing list Onderwerp: gEDA-dev: Broken libgd support in gschem (arc drawing) PATCH I've discovered that after enabling libgd, it draws the arcs upside-down with respect to what gschem does. It appears that libgd has angles starting with 0 degrees on the +ve X axis (rightmost), and +ve clockwise. gschem appears to have 0 degrees on the +ve X axis (rightmost), and +ve ANTI-clockwise (which is more what an electrical engineer might expect :)) The code before was obviously buggy - look at some of the "if" statements - so I've re-written it. It appears to work in all cases I tried. libgd has a requirement that start_angle < end_angle, and draws clockwise between the two. It doesn't like -ve angle inputs. So.. for example, to draw between -10 and 10 degrees, spanning an arc of 20 degrees, you'd pass start_angle = 350 and end_angle = 370. (I think it also works with start_angle = 350 and end_angle = 10 but the manual does specifically say end_angle must be greater than start_angle) *** If you want to wait on this bug, until after the noscreen work merges - there is already a combined fix for this and noscreen in my branch (git - not CVS yet) *** -- Peter Clifton Electrical Engineering Division, Engineering Department, University of Cambridge, 9, JJ Thomson Avenue, Cambridge CB3 0FA Tel: +44 (0)7729 980173 - (No signal in the lab!) _______________________________________________ geda-dev mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-dev
