Hi, I'm currently working on a Perl re-implementation of Osmarender. It is already almost feature complete; I've made an early announcement on the [EMAIL PROTECTED] list:
http://lists.openstreetmap.org/pipermail/tilesathome/2008-March/001903.html While the program generally aims to be 100% compatible to the XSLT implementation (using identical rule files), one thing I want to change is the way polygons with holes are drawn. I want to switch from the default evenodd rule (that relies on the directions of ways) to the nonzero rule, and use it like so (pseudo code, omitting all the filtering and layering stuff): for each way with area tagging if way is member of multipoly relation if role is "inner" ignore way else combine way and all "inner" members of relation generate drawing instruction for combined path end else generate drawing instruction for simple path end end The tags that determine how the way is drawn would always be those of the "outer" way. Those of the "inner" way(s) would be completely ignored, unless they, in turn, were "outer" ways in another relation (or unless a non-area rule would apply to them). Tags on the relation would be ignored as well. There are a number of evil cases here, for example if you have a multipoly relation with intersecting "inner" ways or "inner" ways that are in fact somewhere on the outside - these will most likely lead to very strange results but I'm not so worried about that. Do you think this would work? I'm a bit unsure about ignoring the tags on the relation; ideally these should override tags on the outer way, if specified (or no?). But since nobody supports that anyway at the moment, I thought we can leave that for later. Bye Frederik -- Frederik Ramm ## eMail [EMAIL PROTECTED] ## N49°00.09' E008°23.33' _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/dev
