More info about courtyard DRC test: Seth has perfectly answered the question about time calculation: the cost is due to the global number of lines used to build polygonal shapes.
The DRC algorithm is a one pass algorithm (one by board side): - The full set of shape is build. - Then the intersection of all polygons is build (only one pass, and each shape is taken in account only once) using Clipper. I am thinking this is the faster and more easy way to detect overlapping areas. Probably any other way will be more time consuming, especially if a bounding box is tested again all other bounding boxes (footprints can have an orientation not 0 or 90 deg). To minimize the calculation time, just avoid created useless complicated courtyard shapes based only on aesthetic criteria. Most of footprints have a rectangular courtyard shape. This is fine. Some footprints need a more complex courtyard shape (connectors, exotic footprints... ) But they are usually not a lot on a board, so they should not created calculation time issues. -- Jean-Pierre CHARRAS _______________________________________________ Mailing list: https://launchpad.net/~kicad-developers Post to : [email protected] Unsubscribe : https://launchpad.net/~kicad-developers More help : https://help.launchpad.net/ListHelp
