Subject:
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Primitives and quads/triangles
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Newsgroups:
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lugnet.cad
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Date:
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Tue, 15 Oct 2002 07:59:55 GMT
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Viewed:
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427 times
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When I was working on the old Type I trainbase 6 x 12,
I also wanted correct wheels for this part. Since I have
these, I tried to create the wheel. In my first attempt
I used primitives only, but the cones looked horrible
when rendered. In my seccond attempt I created a small
segment (of 5.625 degrees) and created a whole wheel
of 64 segments. This part contains over 700 quads and
over 700 lines. In a third attempt I used primitives
for discs, rings and cylinders, and quad-segments for
the cones (64 segments in a circle).
The rendered results can be seen on my question website:
http://home.hetnet.nl/~niels-karsdorp/ldraw/question.htm
(click on the wheels to show a 640x480 POV-Ray render).
Which technique shall I use on my wheels?
(I also planned to create more wheels:
* old train locomotive wheel with spokes
(same as the one above, but a more cone shape,
used to prevent the anti-slip tyres from falling off)
* a wheel like 7039.dat, but with spokes
I also rendered the existing trainwheel (4180D.dat),
yech, that one doesn't look wel... :-(
Wheel 7039.dat has a few gaps, but when tyres are
applied, these gaps become invisible.
Niels Karsdorp
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Message has 3 Replies:
 | | Re: Primitives and quads/triangles
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| (...) I think Lars Hassing has presented that problem since quite some time ago at his L3P page. I suggest you use the 0 IFPOV method and make two versions of the wheel inside the dat file. /Tore (22 years ago, 15-Oct-02, to lugnet.cad)
| | | Re: Primitives and quads/triangles
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| (...) While your goal is to create something that looks good after L3P has converted it to POV format, bear in mind that it should ideally also look good in the original LDraw format. Using primitives for the cylinders, and not for the cones will (...) (22 years ago, 15-Oct-02, to lugnet.cad)
| | | Re: Primitives and quads/triangles
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| "Niels Karsdorp" wrote... (...) I will strongly recommend to use primitives whenever possible. Note that L3P v1.3 only supports the 1-4conN.dat primitives, not the 4-4conN.dat. I'll add this to the next version... So, until then use 4 1-4conN.dat (...) (22 years ago, 17-Oct-02, to lugnet.cad)
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