Subject:
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Re: Help needed with cond. lines
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Newsgroups:
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lugnet.cad.dat.parts
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Date:
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Sun, 6 Apr 2003 15:30:40 GMT
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Viewed:
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4988 times
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In lugnet.cad.dat.parts, Travis Cobbs writes:
> I've created another drawing to help illustrate my descriptions below.
> Please refer to it while reading below. You can find it here:
>
> The edge between the two ndis primitives is empty space. Conditional lines
> should never be put in empty space.
ok
> However, my curve smoothing code only works when the conditional lines
> exactly match the edges of the shapes that need smoothing. Since there are
> two triangles on the right of this conditional line and two quads on the
> left, the smoothing doesn't happen. There has to be exactly one polygon on
> each side, with two points in common with the conditional line end points
> for any smoothing to occur.
>
> What I did was split the one conditional line into two conditional lines.
> Since you had another conditional line that wasn't supposed to be there (the
> one between the two ndis primitives), I simply changed that one to handle
> the top portion, and changed the long one to just handle the bottom section.
>
> <code removed>
>
> There's nothing really wrong with what you have. The problems you are
> seeing are caused by two different things. If you turn primitive
> substitution off in LDView, you will see that the join between the
> half-cylinder and the other geometry becomes smooth
upps ... I was totally ignoring the primitive substitution in LDview, shame
on me :-(
> I think that the other problem you are referring to is the join between the
> regions shaped like the ndis primitive and the polygons behind them. If you
> zoom in far enough, you will see that these are actually being smoothed.
> The problem is that the edge triangles in the ndis-shaped areas are too
> narrow to provide good looking smoothing.
>
> You could probably decrease the effect by moving points around, but I'm not
> sure it is worth the effort, and I think it would require some
> experimentation.
> I hope this at least clears up your confusion, even if it doesn't actually
> solve the problem.
yepp ... I'll try to remodel the whole thing.
many thx, w.
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Message is in Reply To:
 | | Re: Help needed with cond. lines
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| I've created another drawing to help illustrate my descriptions below. Please refer to it while reading below. You can find it here: (...) The edge between the two ndis primitives is empty space. Conditional lines should never be put in empty space. (...) (24 years ago, 3-Apr-03, to lugnet.cad.dat.parts)
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