CAD Development : 3013


CAD / Development / 3013	3012 \| 3014

Subject:	Re: Hidden surface removal, and vertex order in part/primitive DAT files
Newsgroups:	lugnet.cad.dev
Date:	Mon, 4 Oct 1999 15:56:44 GMT
Viewed:	658 times

Jean-Pierre PARIS wrote: > > I really don't like programs that need user interactions for such job! > Thus I tried to cast enough rays so that all the faces are being > oriented correctly. Now all the std bricks are OK, without any > assumption about the fact that they are mainly composed of 2 box5 and a > lot of studs. The general algorithm is working well here. You need to have someone to check the parts, take a look at the picture at http://www.geocities.com/colosseum/3479/flag.jpg (from 105.DAT), there's a missing face and the program won't be able to handle that. There are other parts like that, just start checking and you'll see. Leonardo PS: Just found a bug in MS VC++, it says that acos(1) = indeterminate. :)

Message has 1 Reply:

		Re: Hidden surface removal, and vertex order in part/primitive DAT files
(...) Sorry Leonardo, but I checked 105 again my code: it does the right job! Ok, you can argue it's pure luck. In fact, it is! If a ray went through the hole between the flag and the rest of the piece, my code would invert the flag orientation. (...) (25 years ago, 5-Oct-99, to lugnet.cad.dev)

Message is in Reply To:

		Re: Hidden surface removal, and vertex order in part/primitive DAT files
(...) I really don't like programs that need user interactions for such job! Thus I tried to cast enough rays so that all the faces are being oriented correctly. Now all the std bricks are OK, without any assumption about the fact that they are (...) (25 years ago, 3-Oct-99, to lugnet.cad.dev)

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