On Jul 13, 2012, at 9:11 AM, Colin Holgate wrote: > One exercise in that book I wrote is about using an image as a color picker. > It uses the same technique as Scott mentioned, only I then set the color of > another graphic to show that it has picked up the right color. > > One thing to double check, the x and y values you're using, are those from > the top left of the image? With mousecolor you use the card position, but > with this imagedata technique you would subtract the left and top of the > image in question, unless the image is the whole card.
function relativeXY tObjRef,x,y -- input: x,y (card coordinates) -- output: coordinates relative to an object's rect put the topleft of tObjRef into tl put item 1 of tl into baseHoriz put item 2 of tl into baseVert return (x - baseHoriz & comma & y - baseVert) end relativeXY -- Peter Peter M. Brigham pmb...@gmail.com http://home.comcast.net/~pmbrig _______________________________________________ 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
