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Re: Weiler Atherton Clipping Algorithm [message #62447 is a reply to message #62445]

Tue, 09 September 2008 09:03

rogass
Messages: 200
Registered: April 2008

Senior Member

Yes, a native implementation would be the best. Unfortunately, there
is still no solution. I have polygones with hundreds of vertices and
now it's time for me to decide how to handle this. I tried Mati Merons
Shape_overlap algorithm based on the Sutherland approach, which is
fast enough, but Mati's version gives me the wrong results.

The c-Version from JD - I don't really know how to implement this in
my program. Is there are a ready-to-use part, which can be directly
used within IDL?

Isn't there any other algorithm which can handle clipping of difficult
and concave polygones? I can't understand this, really! In my opinion,
it is a basic task in image processing. I have written a very complex
computation and the last step would be the comparison of the
polygones. Now, missing implementations of those algorithms hinder me
to fulfill my task.... It's very annoying...

Maybe, someone has written another polygon clipping algorithm to
handle the problems with concave and complex polygones? Maybe, someone
is able to give me a hint or where I could start?

Please, excuse my English, I'm not a native speaker.

Thanks and best regards

Chris

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[Message index]

		Re: Weiler Atherton Clipping Algorithm By: rogass on Tue, 09 September 2008 11:59
		Re: Weiler Atherton Clipping Algorithm By: David Fanning on Tue, 09 September 2008 10:26
		Re: Weiler Atherton Clipping Algorithm By: wlandsman on Tue, 09 September 2008 10:10
		Re: Weiler Atherton Clipping Algorithm By: David Fanning on Tue, 09 September 2008 09:39
		Re: Weiler Atherton Clipping Algorithm By: rogass on Tue, 09 September 2008 09:03
		Re: Weiler Atherton Clipping Algorithm By: wlandsman on Tue, 09 September 2008 06:40
		Re: Weiler Atherton Clipping Algorithm By: rogass on Tue, 09 September 2008 05:32
		Re: Weiler Atherton Clipping Algorithm By: Wox on Tue, 09 September 2008 04:35

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