Subject:
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Re: 3D matrix math question
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Newsgroups:
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lugnet.cad.dev
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Date:
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Tue, 16 Dec 2008 02:49:51 GMT
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Viewed:
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12443 times
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In lugnet.cad.dev, Travis Cobbs wrote:
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In lugnet.cad.dev, Travis Cobbs wrote:
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In lugnet.cad.dev, Timothy Gould wrote:
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Would a simple solution just be to move the conditional points right in
close to the original points at parse time? If the length of the
conditional vectors is unimportant then you’d be decreasing the number of
conditional points that lie outside the viewing frustum. With a distance
of, say, 1/10th LDU from the line you’d rarely encounter any problems.
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So I think something along these lines (or a better works-mostly solution)
would be better.
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I think you’re right. I’ll look into that. It seems like the most
straightforward, and since it’s just a pre-processing step, it shouldn’t
affect the performance for anything other than model loading.
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OK, I applied this fix (pulling the control points to be 1 LDU from the first
point of the conditional line), and it seems to work. It makes the “Show
control points” option under conditional lines less useful, but that’s a
price I’m willing to pay. Of course, this doesn’t completely solve the
problem, but I think that it helps enough that I’m going to live with the
remaining known problem.
--Travis
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Fixing this one group of rarely important special cases in an efficient manner
is probably not the most valuable use of your time.
You could always offer ‘condition point compression’ as a user-selectable
option.
Tim
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Message has 1 Reply:
 | | Re: 3D matrix math question
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| (...) This is true, and I actually try to work this way, but if you look up the thread to ((URL) here>), you'll see that this bug led to a problem that would be visible in real-world parts if the suggested conditional edge primitive is created. And (...) (16 years ago, 16-Dec-08, to lugnet.cad.dev, FTX)
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Message is in Reply To:
| | Re: 3D matrix math question
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| (...) OK, I applied this fix (pulling the control points to be 1 LDU from the first point of the conditional line), and it seems to work. It makes the "Show control points" option under conditional lines less useful, but that's a price I'm willing (...) (16 years ago, 14-Dec-08, to lugnet.cad.dev, FTX)
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