CAD Development : 3006


CAD / Development / 3006	3005 \| 3007

Subject:	Re: Hidden surface removal, and vertex order in part/primitive DAT files
Newsgroups:	lugnet.cad.dev
Date:	Sun, 3 Oct 1999 21:17:06 GMT
Viewed:	695 times

Gary Williams wrote: > > [snip] > Maybe it would be simpler to just manually set the vertex order of the first > polygon, let the program fix that polygon's neighbors and its neighbors' > neighbors, and if any polygons are left then ask the user to set the vertex > order of one of those remaining, and repeat the process. 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. If the pressure of all Ldrawers grows, I'll try to take time, and check my code against more parts. If someone has good ideas of difficult bricks, please let me know! > There are only 1600+ part files, after all...we could use a group of > volunteers to divide the task, and get every part fixed in a week's time. :) Get ready with a Java dev. kit, and I can send my code to you!!! > -Gary bye jp

Message has 2 Replies:

		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)

		Re: Hidden surface removal, and vertex order in part/primitive DAT files
(...) Neither do I, but I also know how hard it is to visually check a part for errors. (...) How does that work? Is it based on what the majority of the rays deterimine? I probably need to re-read some of the messages in this thread, to get a (...) (25 years ago, 4-Oct-99, to lugnet.cad.dev)

Message is in Reply To:

		Re: Hidden surface removal, and vertex order in part/primitive DAT files
Jean-Pierre PARIS wrote in message <37F660FB.1EC77AC9@w...doo.fr>... (...) I see where you're coming from now. You're right. (...) could (...) It's starting to sound like user intervention would be needed in most, if not all, cases. Maybe it would (...) (25 years ago, 3-Oct-99, to lugnet.cad.dev)

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