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Newcomers DBPro Corner / 'sprite hit' using bounding rectangle?...

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Foz
16
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Joined: 18th Dec 2007
Location: California
Posted: 21st Feb 2008 05:12
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I was told that 'sprite collision' uses the bounding rectagles of the images in question, and 'sprite hit' uses the actual opaque pixels - but this proved not to be the case. I would love for my cursor to detect only the inside of the concave polygons I'm using in my program - is there a simple way?...


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Kentaree
21
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Joined: 5th Oct 2002
Location: Clonmel, Ireland
Posted: 21st Feb 2008 14:14
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You're a bit unclear, but what it seems to me is that you're looking for pixel perfect collision, which isn't possible using DBP's built-in commands. I think Freddix made a plugin for sprites which can do pixel perfect collision among other stuff, do a search for freddix + sprite and you'll probably find something.

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Foz
16
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Joined: 18th Dec 2007
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Posted: 22nd Feb 2008 02:16
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Quote: "which isn't possible using DBP's built-in commands."


Thanks, that's probably what I should have asked. I did a little searching for 'freddix', 'ianM', and 'pixel-perfect' and found more questions than answers. It's really only going to be a handful of sprites that will truly benefit from that level of detection, so I'll just write a little algorithm of my own to use once the original collision returns true.


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Foz
16
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Joined: 18th Dec 2007
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Posted: 25th Feb 2008 03:30
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I tried it, but it still considered the transparent portion of the target sprite a hit. Do I need to modify my program to make it work? the 2 sprites in question are both PNG's and have backsave and transparency set to the default '1', if that's any help.


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