Subject:
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Re: Technic flex hose 9 (repost)
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Newsgroups:
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lugnet.cad
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Date:
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Fri, 30 Apr 1999 06:38:10 GMT
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Viewed:
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583 times
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On Fri, 30 Apr 1999 06:19:09 GMT, legoverse@geocities.com (Terry K) wrote:
> (This is a fixed repost of Mark R. David's 9 long piece, please take a look at the piece and comment)
Mark, I hope you don't mind me correcting your original posting. The MPD file
was incorrect. You should have only one part per file, and the main piece
should be first in order, followed by subpieces and sub-subpieces (primitives).
And the file also had some wrapped lines in the ~4-4co89 file. You need to
make sure your linelength is set to more than 79 lines when posting dat files.
Set it up to around 150 or so, then put it back to 79 afterwards.
> ---original text--
>
> Here is an initial cut at the Technic-style hoses (or tubes, or
> whatever). Please let me know how to improve them - this is my first
> attempt at creating parts, and all suggestions are solicited.
>
> Notes:
> ~th9.dat is the shorter hose (approx. 9 studs) and ~th12.dat is the
> longer one (approx. 12 studs). I don't have any other lengths - if
> there are any, let me know. Also, anyone got any part #'s for these?
>
> These are straight configurations of the hoses, i.e., no bends. I
> intend to look at John Van Zwietens bezier curve modelling spreadsheet
> in the near future, to see if these can be easily plugged into it.
Yes. For LDraw, we would need to have components of this element available to
model curves. We could not add pre-made curve pieces with any hope of meeting
the requirements of all users. It would have to be done in a manner similar to
the existing small flex hose piece.
> ~th.dat is a single inner cylinder + outer cylinder element that is
> repeated to create a complete hose. It in turn refers to ~4-4co89.dat,
> an 8:9 ratio cone derived from Steve Bliss's 4-4con12.dat. It is used
> to "round" the corners of the outer cylinders.
This primitive would, of course, have to approved by the primitives group. If
not, it could be inlined, or added as a subfile.
> Each end has a short (1) inner cylinder "stub", which I put there
> because it's there sometimes. This could be an artifact of the
> manufacturing process, so let me know whether you prefer it or not.
Good question. You say "sometimes". It might be a flaw. Anyone know?
> Things I don't like: in a dead on front view in LDLite, the right (on
> the screen) cones that round off the outer cylinder's edge don't seem to
> show up the same size as the other cones. I've checked the numbers a
> dozen times, and when you blow it up it looks fine. Is this an artifact
> of rendering? Should I ignore it, or try to compensate?
It looks even more bizarre when viewed at lower sizes, like .9 or less.
That may be rendering artifacts, or there may be some way of fixing it. Any of
you whiz kids out there have any ideas?
> Also, oblique views just don't look that good to me - kind of a jumble
> of edges. Again, I haven't tried this enough to know whether it's a
> fact of life with this dense a construction, or a sign that I need to
> keep puttering with it.
Oblique views don't look too bad to me.
-- Terry K --
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