Subject:
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Re: The use of type 5 lines for smoothing of objects.
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Newsgroups:
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lugnet.cad.dev
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Date:
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Wed, 8 May 2002 21:53:17 GMT
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Viewed:
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586 times
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"Don Heyse" <dheyse@hotmail.spam.go.away.com> wrote in message > >Perhaps we
could solve the speed problem by inserting a comment before
> and after smoothing only optional lines (like on a concave surface) so
> the viewers can ignore them for if the part isn't transparent.
This sounds possible. The only problem is that they all have to be inserted
as comments because older programs do not understand such a "smoothing only"
comment and ignore it. So extra optional lines can only be added as comments
unless there is some ancient end of file comment that can be skipped by
modern programs. Behind that comment extra stuff could be written.
I think the performance decrease will not be significant if al smooth edges
would be marked with ordinary type 5 lines. That's because most hollow
portions of objects are made with primitives and primitives have optional
lines. Only some unique portions of part files are concave without optional
lines defined in them (like the inside of minifig hands). I suspect that the
performance decrease will be small if they were placed in there. The
benefits will be greater. Things will look much better and more true.
Graphics cards performance and cpu power grows exponentially so it is not
really a problem. Also part design will become more straightforward.
> Meanwhile, can we try out your demo?
I will sort out my code tomorrow. I hope I can make it ready for viewing by
then. You can try it when it is presentable.
Martijn Zwaal
by the way, I can tell you already that I use the C++ standard library for
lists and maps. With them you can programs the algorithm ( unless you can
write a more robust map yourself ).
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Message has 1 Reply:
Message is in Reply To:
 | | Re: The use of type 5 lines for smoothing of objects.
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| (...) I tend to agree with you. My suggestion to Travis was based on about 2 seconds of thought when I read his email. It occured to me that type 2 lines are used to denote hard edges so I mentioned the possibility of using them instead of type 5 (...) (23 years ago, 8-May-02, to lugnet.cad.dev)
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