Subject:
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Re: Primitives and quads/triangles
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Newsgroups:
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lugnet.cad
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Date:
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Thu, 17 Oct 2002 01:04:44 GMT
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Viewed:
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454 times
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"Niels Karsdorp" wrote...
> Which technique shall I use on my wheels?
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 primitives to see the effect in POV.
Type "l3p -pp" to see a list of currently supported primitives.
BTW, has the unfortunate 4-4con12.dat been deleted officially?
The 4-4con1.dat says:
0 19990819 SEB Renamed 4-4con12.dat to 4-4con1.dat
Should I delete my 4-4con12.dat?
Combining three or more cones to achieve the right cone may look good in POV
but doesn't it create unnecessarily many triangles in other renderers?
The same goes for combining multiple rings.
A solution could be something similar to the tori primitives:
cnIIIOOO.dat
where III is inner radius and OOO the outer, e.g. cn016019.dat
And rnIIIOOO.dat for rings.
For quarter cones and rings, well, can we sneak in a '4' somewhere?
It will result in more primitives, but renderers can benefit from fewer
(and larger) triangles.
> (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)
I have some very old (1966) train wheels with four studs and with grooves
(matching the tracks), http://guide.lugnet.com/set/117
The locomotive version is conical and smooth and supposed to hold
an anti-slip tyre, http://guide.lugnet.com/set/112_2
/Lars
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Message has 1 Reply:
 | | Re: Primitives and quads/triangles
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| (...) Sounds great, the wheels have several unusual sized rings (inner radius 8, outer radius 22 or 28) (inner radius 19, outer radius 22) No I have to use two or three rings, or use quads and POV ring: 0 L3P IFNOTPOV ldraw quads (and optional lines (...) (22 years ago, 17-Oct-02, to lugnet.cad)
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Message is in Reply To:
| | Primitives and quads/triangles
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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 (...) (22 years ago, 15-Oct-02, to lugnet.cad)
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