The KiCAD code uses all kinds of different units for distances. Amongst other things I found: nm: pcbnew internal units 10nm: Gerbview internal units 100nm EEschema internal units 1um: PL-Editor internal units 0.1mil (2.54um): SetViewport 1mil (25.4 um): WS_DRAW_ITEM_BASE and GetSizeMils And the native File formats use mm (pcbnew) and mil (EEschema). Something like SVG exports in 0.1 mil steps. I think that this is not very consistent and something like a PLOTTER class needs to handle different IU-sizes.
My idea is to rewrite the internal units so that nm are used everywhere inside the source code, and only parts that write or read files and display data to or read data from the user should convert it to another unit system. I don't want to change any file formats. That would make it a bit more straightforward, more consistent, metric and an SVG-Plotter would use a metric step size. The disadvantage would be that there would be an about 2m or 4m limit in every direction, assuming int is 32 bit, which is AFAIK true for all platforms KiCAD current supports. Before i rewrite code, can you say what you guys think about it? Johannes Pfister _______________________________________________ Mailing list: https://launchpad.net/~kicad-developers Post to : kicad-developers@lists.launchpad.net Unsubscribe : https://launchpad.net/~kicad-developers More help : https://help.launchpad.net/ListHelp