CAD Development : 3045


CAD / Development / 3045	3044 \| 3046

Subject:	Re: Hidden surface removal, and vertex order in part/primitive DAT files
Newsgroups:	lugnet.cad.dev
Date:	Tue, 5 Oct 1999 21:12:17 GMT
Viewed:	692 times

Leonardo Zide wrote: > > Jean-Pierre PARIS wrote: > > [snip] > 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. 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. Anyway, you can convince yourself that such small holes can catch only a small portion of rays if thay are cast randomly in the 3D space. Thus, my code which starts with a deterministic set of rays finds the correct orientation here. My code cast random rays as the last fallback if it remains unoriented faces. > Leonardo bye jp

Message has 1 Reply:

		Re: Hidden surface removal, and vertex order in part/primitive DAT files
(...) My code worked too but my point was to say that the part is not correct, there could be some cases where it won't work and besides that, it won't look good if you render it with a program that has backface culling. How are you going to save (...) (25 years ago, 6-Oct-99, to lugnet.cad.dev)

Message is in Reply To:

		Re: Hidden surface removal, and vertex order in part/primitive DAT files
(...) You need to have someone to check the parts, take a look at the picture at (URL) (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 (...) (25 years ago, 4-Oct-99, to lugnet.cad.dev)

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