Subject:
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Re: 81 million points
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Newsgroups:
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lugnet.cad.dev
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Date:
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Wed, 21 Jan 2004 14:07:41 GMT
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Viewed:
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1386 times
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> involved deserved a post.
>
> Just out of curiosity, I stuck a counter in my development LDView
> code to count the number of points being drawn. I loaded up the
> copy I have of town.dat (datsville), and was rewarded with a result
> of 81,414,314 points (without edge lines), which rendered at about
> 0.6fps (48 million points per second). I switched to low-res studs,
> and got 46,266,666 points (also without edge lines), which rendered
> right at 1.0fps.
Wow. That must be amazing in fly-thru mode. I'm also curious. What
sort of CPU and how much memory do you have, and how much of that was
in use by the LDVIEW?
> I wasn't using any primitive substitution during the test, so the
> numbers aren't skewed by strips and fans. All the lines have 2
> points, the triangles have 3, and the quads have 4. (Strips and
> fans can reduced the number of points necessary to produce the same
> geometry.)
>
> The official marketing spec for my video card is 325 million
> triangles per second. For various reasons, this effectively ends up
> translating into points per second. So either my code doesn't do a
> very good job of taking advantage of the video card, or the
> marketing spec is unattainable in the real world. (Actually, it's
> probably a combination of both.)
I bet you have to get all your display list(s) and vertex arrays into
the video card memory to get anything close to that number.
Don
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Message has 2 Replies:
 | | Re: 81 million points
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| (...) My system is a 2.4GHz P4 with 1GB RAM. However, according to the Windows XP task manager, LDView was only using about 125 megs when the model was loaded with normal-res studs. (This compares very favorable with the current LDView release that (...) (20 years ago, 21-Jan-04, to lugnet.cad.dev)
| | | Re: 81 million points
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| (...) I forgot to mention. I didn't try fly-through mode, but wouldn't expect it to be very usable at 1 frame per second. --Travis (20 years ago, 21-Jan-04, to lugnet.cad.dev)
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Message is in Reply To:
| | 81 million points
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| I normally don't make posts like this, but I thought the numbers involved deserved a post. Just out of curiosity, I stuck a counter in my development LDView code to count the number of points being drawn. I loaded up the copy I have of town.dat (...) (20 years ago, 21-Jan-04, to lugnet.cad.dev)
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