Jacqueline Gay’s suggestion is excellent, and by exactly aligning the rect of the polygon with the rect of the image being “trimmed”, I can avoid having the image centered or repeated. See script below.
I am still wondering what goes wrong with my alphaChannel approach to showing irregularly shaped images. Is there some imprecision in the “within” function? This would be important to know for other uses of it. David Epstein on imageToGrc gID # fills graphic id gID with image it is positioned on; works for polygon, oval, regular, or rectangle set the linesize of grc id gID to 0 set the filled of grc id gID to false wait 1 ticks # seems needed so that linesize of 0 is respected hide grc id gID import snapshot from rectangle globalRect(the rect of control id gID) put the short id of image (the number of images) into imID set the rect of image id imID to the rect of grc id gID set the filled of grc id gID to true set the backgroundPattern of grc id gID to imID show grc id gID set the loc of grc id gID to the bottomRight of grc id gID ## to make it visible hide image id imID ## note: don’t delete, or polygon loses the image choose browse tool end imageToGrc function globalRect theRect return globalLoc(item 1 to 2 of theRect),globalLoc(item 3 to 4 of theRect) end globalRect _______________________________________________ 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