I asked because I thought QL's proposal might be based on a new algorithm? There are already (partial) solutions to that:
In LCS getting "transparency" clicks of cross-layered objects is hard but possible for a big class of regions (see stack #47 = "pointInShape" of the Raspi stacks collection, July 2015). For LCB I already implemented "transparency clicks" for rotated rectangular shapes in my last two (already shared) widgets. Just now also for a bit more complicated shapes (-> LC Global, Nov). Both methods are based on the subdivison algorithm by MShimrat (Aug 1962). This algorithm is in LCB/LC 9.0.0-dp9 *very* fast, by the way, usable in a mouseDown handler for checking regions defined by several hundred points. For more general regions (closed polygons), as Quentin L. suggests, this algorithm is also applicable, *without change* as long as the region-polygons are not self-intersecting. _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
