Subject:
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Re: Hidden surface removal, and vertex order in part/primitive DAT files
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Newsgroups:
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lugnet.cad.dev
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Date:
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Tue, 5 Oct 1999 21:21:54 GMT
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Viewed:
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651 times
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Steve Bliss wrote:
>
> On Sun, 3 Oct 1999 21:17:06 GMT, Jean-Pierre PARIS
> <Paris.Jean-Pierre@wanadoo.fr> wrote:
>
> > Gary Williams wrote:
> > [snip]
> 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 better idea of this process.
I choose rays so that they may orient one face. With this face I use a
sort of flood-fill algorithm (please try to find on of my previuos
message) to orient al neighbors. Once a face is oriented, I don't look
at it anymore. But, your idea could make my code more robust. I'll think
about that!
> > 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.
>
> So do you 'drill into' primitives?
I regenerate all the files that are used to make up the part I want to
orient. If one primitive is used twice with 2 different sides lit, I
have to produce 2 different files with inverted orientation.
> > [snip]
> Do you want suggestions of difficult bricks to test against?
>
> 2560 (Boat Base 8 x 16) is pretty ugly. It's a big file, there are lots of
> nooks and crannies, and I had to cut apart various primitives to make it
> all go. If you test on this brick, I can also send you the final set of
> files, un-inlined.
GOOD POINT! You dicovered 2 bugs in my code!!!!! Ok now, one is
corrected but it'll take more time to correct the second one. Then I'll
post the results here...
> > [snip]
>
> Package it so the fixer doesn't need a JDK, and send it to a lot of people.
To do that I have to check what's Sun offer. I can afford VisualJ++.
And event after I packaged it, it would be a rather big zip! Let me
take time to see if I can manage something correct...
> Steve
bye
jp
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