Comments on: Hit Area of external assets with alpha channels (PNGs and SWFs) http://blog.erikphansen.com/hit-area-of-external-assets-with-alpha-channels-pngs-and-swfs The reward of a thing well done... Fri, 13 Jan 2012 18:31:27 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Abinash Pradhan http://blog.erikphansen.com/hit-area-of-external-assets-with-alpha-channels-pngs-and-swfs/comment-page-1#comment-1408 Abinash Pradhan Thu, 19 May 2011 13:21:22 +0000 http://blog.erikphansen.com/?p=65#comment-1408 <p>Dear Erik,</p> <p>Your helper function (getAlpha) helped me a lot!! Thanks for sharing.</p> <p>Warm Regards, Abinash</p> Dear Erik,

Your helper function (getAlpha) helped me a lot!! Thanks for sharing.

Warm Regards, Abinash

]]> By: Craig Murray http://blog.erikphansen.com/hit-area-of-external-assets-with-alpha-channels-pngs-and-swfs/comment-page-1#comment-1320 Craig Murray Tue, 22 Feb 2011 02:15:45 +0000 http://blog.erikphansen.com/?p=65#comment-1320 <p>This solution does not work when these objects overlap each other, since the mouse event will be consumed in cases where the mouse is over the bitmap, but also over a transparent pixel. In that case, the event should be given a chance to trigger on objects underneath this object.</p> <p>A better solution is Moses's InteractivePNG. http://blog.mosessupposes.com/?p=40</p> This solution does not work when these objects overlap each other, since the mouse event will be consumed in cases where the mouse is over the bitmap, but also over a transparent pixel. In that case, the event should be given a chance to trigger on objects underneath this object.

A better solution is Moses’s InteractivePNG. http://blog.mosessupposes.com/?p=40

]]> By: Ermal http://blog.erikphansen.com/hit-area-of-external-assets-with-alpha-channels-pngs-and-swfs/comment-page-1#comment-496 Ermal Thu, 25 Mar 2010 20:34:13 +0000 http://blog.erikphansen.com/?p=65#comment-496 <p>Thanks a lot, this is very helpful indeed, simple but yet powerful, i was wandering if there was a way to obtain a "border" or a sprite from the image so you wouldn't have to check every time for the alpha channel.</p> Thanks a lot, this is very helpful indeed, simple but yet powerful, i was wandering if there was a way to obtain a “border” or a sprite from the image so you wouldn’t have to check every time for the alpha channel.

]]> By: Jairus http://blog.erikphansen.com/hit-area-of-external-assets-with-alpha-channels-pngs-and-swfs/comment-page-1#comment-456 Jairus Fri, 12 Feb 2010 07:03:31 +0000 http://blog.erikphansen.com/?p=65#comment-456 <p>how about creating a bitmap using threshold(), then using that bitmap as the mouse over area? would that work or would it just use the rect of the bitmap instead of it's visible alpha channels?</p> how about creating a bitmap using threshold(), then using that bitmap as the mouse over area? would that work or would it just use the rect of the bitmap instead of it’s visible alpha channels?

]]> By: dan http://blog.erikphansen.com/hit-area-of-external-assets-with-alpha-channels-pngs-and-swfs/comment-page-1#comment-449 dan Wed, 03 Feb 2010 11:39:33 +0000 http://blog.erikphansen.com/?p=65#comment-449 <p>What about using the InteractivePNG library ?</p> <p>http://blog.mosessupposes.com/?p=40</p> What about using the InteractivePNG library ?

http://blog.mosessupposes.com/?p=40

]]> By: Toine Kamps http://blog.erikphansen.com/hit-area-of-external-assets-with-alpha-channels-pngs-and-swfs/comment-page-1#comment-346 Toine Kamps Sat, 28 Nov 2009 13:14:21 +0000 http://blog.erikphansen.com/?p=65#comment-346 <p>Hi Erik,</p> <p>Great post, just what I was looking for! However, I can't seem to get it working. I'm not really an expert on external classes etc. So I was wundering if you could be so kind to provide me with a working example.... If not, that's fine too, then I will have to figure out a workaround. Thanks in advance!</p> <p>Best, Toine</p> Hi Erik,

Great post, just what I was looking for! However, I can’t seem to get it working. I’m not really an expert on external classes etc. So I was wundering if you could be so kind to provide me with a working example…. If not, that’s fine too, then I will have to figure out a workaround. Thanks in advance!

Best, Toine

]]> By: Kirtimaan http://blog.erikphansen.com/hit-area-of-external-assets-with-alpha-channels-pngs-and-swfs/comment-page-1#comment-299 Kirtimaan Thu, 15 Oct 2009 11:00:34 +0000 http://blog.erikphansen.com/?p=65#comment-299 <p>Hi Erik, hope you are doing well. Like yedda mentioned one way to do this can be a wrapper function which get object under point and find the next immediate object listening mouse click event with no transparent area and then we manually dispatch click event for that object. But since all points used in getObjectsUnderPoint are assumed to be in global coordinate space, some sort of hack will be required to convert mouse event location into local coordinate space of that object.</p> Hi Erik, hope you are doing well. Like yedda mentioned one way to do this can be a wrapper function which get object under point and find the next immediate object listening mouse click event with no transparent area and then we manually dispatch click event for that object. But since all points used in getObjectsUnderPoint are assumed to be in global coordinate space, some sort of hack will be required to convert mouse event location into local coordinate space of that object.

]]> By: Erik http://blog.erikphansen.com/hit-area-of-external-assets-with-alpha-channels-pngs-and-swfs/comment-page-1#comment-228 Erik Sat, 22 Aug 2009 05:56:44 +0000 http://blog.erikphansen.com/?p=65#comment-228 <p>When the time comes to solve that problem, that sounds like a good method to investigate.</p> <p>Thanks :)</p> <p>Erik</p> When the time comes to solve that problem, that sounds like a good method to investigate.

Thanks :)

Erik

]]> By: yedda http://blog.erikphansen.com/hit-area-of-external-assets-with-alpha-channels-pngs-and-swfs/comment-page-1#comment-227 yedda Sat, 22 Aug 2009 05:18:48 +0000 http://blog.erikphansen.com/?p=65#comment-227 <p>I would think that using something like this in combination with DisplayObjectContainer.getObjectsUnderPoint() would help solve the issue of accessing items under the transparent parts of an image. It would probably be a it messy, though.</p> I would think that using something like this in combination with DisplayObjectContainer.getObjectsUnderPoint() would help solve the issue of accessing items under the transparent parts of an image. It would probably be a it messy, though.

]]> By: Erik http://blog.erikphansen.com/hit-area-of-external-assets-with-alpha-channels-pngs-and-swfs/comment-page-1#comment-184 Erik Wed, 08 Jul 2009 00:42:27 +0000 http://blog.erikphansen.com/?p=65#comment-184 <p>Good point! I'm sure there's got to be a way to build another hack on top of this hack. :) I might look into it if I find the time. Or maybe someone else out there has a fix up their sleeve!</p> <p>Erik</p> Good point! I’m sure there’s got to be a way to build another hack on top of this hack. :) I might look into it if I find the time. Or maybe someone else out there has a fix up their sleeve!

Erik

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