Subject:
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Re: Use of arbitrary elements with LSynth
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Newsgroups:
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lugnet.cad.dev
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Date:
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Tue, 22 Apr 2003 13:19:50 GMT
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Viewed:
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894 times
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In lugnet.cad.dev, Larry Pieniazek writes:
> Kevin
>
> I've created an element that represents a small segment of string. It's not
> a real, legitimate LDraw part, per se, but I find it useful in my modeling.
>
> Is it possible to get LSynth to use this element? I'm looking for it to be
> treated similar to a rubber band in that I may want it to be (partly) wound
> around constraining things like bushings or pulleys, but similarly to a flex
> tubing in that it will usually be open ended.
Not currently.
>
> Usually I would want it to be taut, with all segments tangent except where
> wound around a constraint, but sometimes not taut (for example if shown
> coiled out of the way)
>
> I read the instructions for LSynth and I even have a copy of your book, like
> the instructions suggest (grin), but I didn't see this topic covered in the
> LSynth chapter.
Thanks for buying the book. You are right, it does not cover this.
Currently LSynth only supports either open ended or closed loop. No mixing.
>
> For reference, here's the string segment model I use. This segment is NOT
> very accurately modeling a 3 strand twisted string but it has enough non
> black in it from a distance to sort of give the impression of highlights. I
> abut two of these, one rotated 180 degrees so the triangles face the other
> way, to give a diamond reflective effect.
>
> You can see my use of string in the POV render at the top of this page
> http://www.miltontrainworks.com/item_info_1004.html#MTW-1004-by
> as well as in the instructions fragment partway down the page. At these
> magnifications it is good enough. All the string segments were pieced
> together by hand, including transitions from tangent to curved around
> bushings and so forth.
>
> A generic way to use LSynth would be very welcome!
Yes. It would. There are a *number* of things it cannot do.... yet!
(chains with sag, string with sag, user created synthesis things.....
It is a very good idea you have, and I'll work on both ideas, mixable
splines/tangent/arcs as well as user defined beginning,middle and end parts.
As you may be able to tell, I'm on an LPub burn right now, but LSynth will
get its time.
Kevin
>
> - start dat -
>
> 0 Short Straight String Segment
> 0 Name: StrSegHex2x.dat
> 0 Author: Larry Pieniazek with MLCad
> 0 Unofficial Model
> 0 ROTATION CENTER 0 0 0 1 "Custom"
> 0 ROTATION CONFIG 0 0
> 3 0 0 0 1 1 0 1 0.5 0.866026 1
> 3 0 0.866026 0.5 -1 0.866026 -0.5 -1 1 0 1
> 3 8 0.866026 0.5 -1 1 0 1 0.5 0.866026 1
> 3 0 0.866026 0.5 -1 0.866026 -0.5 -1 0 0 -1
> 3 0 0 0 1 0.5 0.866026 1 -0.5 0.866026 1
> 3 0 0 1 -1 0.866026 0.5 -1 0.5 0.866026 1
> 3 8 0 1 -1 0.5 0.866026 1 -0.5 0.866026 1
> 3 0 0 1 -1 0.866026 0.5 -1 0 0 -1
> 3 0 0 0 1 -0.5 0.866026 1 -1 0 1
> 3 0 -0.866026 0.5 -1 0 1 -1 -0.5 0.866026 1
> 3 8 -0.866026 0.5 -1 -0.5 0.866026 1 -1 0 1
> 3 0 -0.866026 0.5 -1 0 1 -1 0 0 -1
> 3 0 0 0 1 -1 0 1 -0.5 -0.866026 1
> 3 0 -0.866026 -0.5 -1 -0.866026 0.5 -1 -1 0 1
> 3 8 -0.866026 -0.5 -1 -1 0 1 -0.5 -0.866026 1
> 3 0 -0.866026 -0.5 -1 -0.866026 0.5 -1 0 0 -1
> 3 0 0 0 1 -0.5 -0.866026 1 0.5 -0.866026 1
> 3 0 0 -1 -1 -0.866026 -0.5 -1 -0.5 -0.866026 1
> 3 8 0 -1 -1 -0.5 -0.866026 1 0.5 -0.866026 1
> 3 0 0 -1 -1 -0.866026 -0.5 -1 0 0 -1
> 3 0 0 0 1 0.5 -0.866026 1 1 0 1
> 3 0 0.866026 -0.5 -1 0 -1 -1 0.5 -0.866026 1
> 3 8 0.866026 -0.5 -1 0.5 -0.866026 1 1 0 1
> 3 0 0.866026 -0.5 -1 0 -1 -1 0 0 -1
> 0
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Message has 1 Reply:
 | | Re: Use of arbitrary elements with LSynth
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| (...) But since you've made the source for lsynth available, there's no reason why Larry couldn't attempt to add the string part to the code himself and then submit the patches to you for official approval. Right? Isn't that the whole point of (...) (22 years ago, 22-Apr-03, to lugnet.cad.dev)
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Message is in Reply To:
| | Use of arbitrary elements with LSynth [DAT]
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| Kevin I've created an element that represents a small segment of string. It's not a real, legitimate LDraw part, per se, but I find it useful in my modeling. Is it possible to get LSynth to use this element? I'm looking for it to be treated similar (...) (22 years ago, 22-Apr-03, to lugnet.cad.dev)
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