Subject:
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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 07:37:35 GMT
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Viewed:
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1495 times
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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
(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.
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.)
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Message has 1 Reply:
 | | Re: 81 million points
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| (...) 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 bet you have to get all your display list(s) and vertex arrays into the (...) (20 years ago, 21-Jan-04, to lugnet.cad.dev)
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