Subject:
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Re: repost: chains1.dat
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Newsgroups:
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lugnet.cad.dat.parts
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Date:
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Thu, 2 Nov 2000 14:51:36 GMT
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Viewed:
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801 times
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In lugnet.cad.dat.parts, Matt Schild writes:
> > Matt,
> > They're still type-"2" lines.
> > Franklin
>
> <multiple deleted expletives> I fixed this.
> I've got no idea why it didn't post the right one...
> let's try it again.
OK, technically they are type-"5" lines now,
but under super-magnification (zoom=20),
they _still_ show up as if they were _regular_ lines
(instead of _conditional_ lines).
Please forgive me if I'm being presumptuous,
but I'd like to offer this example
of how to use type-"5" lines
(which was given to me a while ago by Manfred;
if I screw this up, the fault is all mine, not his).
Click on this link (in a separate window, preferably):
"http://www.brickshelf.com/gallery/fwcain/lcad/example-type5lines.gif"
I'll be referring to this image.
Assume that the red line (from point 1 to point 2)
is the "edge" in question. Let's further assume
that points 3, 1, and 4 are all on the same psuedo-"circle"
(REMEMBER that LDraw does NOT do true circles/curves;
instead, it does decimal approximations resulting
in hexadecagons [sp?] (what we call "16-agons").
So, let's assume that points 3 and 4 are the two points
in the psudo-curve on either side of point 1.
Point 1 is (x1, y1, z1), point 2 is (x2, y2, z2), and so on.
The type-"5" line would be "5 24 x1 y1 z1 x2 y2 z2 x3 y3 z3 x4 y4 z4".
What this means (to LDraw) is "If points 3 and 4 will be
on the same side of the line drawn between points 1 and 2
when displayed on the computer screen, then actually draw
the line; otherwise DO NOT draw the line".
I hope this helps.
Franklin
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Message is in Reply To:
 | | Re: repost: chains1.dat [DAT]
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| (...) <multiple deleted expletives> I fixed this. I've got no idea why it didn't post the right one... let's try it again. 0 chain link 0 Name: chains1.dat 0 Author: Matt Schild 0 Unofficial Model 4 16 0 3 0 0 3.04 0.19 0.38 2.92 0 0.4 2.96 0.19 4 (...) (24 years ago, 2-Nov-00, to lugnet.cad.dat.parts)
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