Subject:
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Re: Lego capable CAD software for the Mac ?
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Newsgroups:
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lugnet.cad
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Date:
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Tue, 14 Dec 1999 22:00:42 GMT
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Viewed:
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654 times
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In lugnet.cad, Jacob Sparre Andersen writes:
> DaveG:
>
> [ LDraw'ing on Mac ]
>
> > You are aware that with MacPerl you can convert old
> > non-MPD files to QuickDraw3D objects and view them in
> > SimpleText.
>
> I wasn't aware of that. Can you write an explanation of what
> to do (I am very uneducated when it comes to Macs), so I can
> add it to the LDraw FAQ (and get LDraw on my current desktop
> machine)?
Yes first learn Perl <grin> next beat head with pipe wrench until
the characters @_ makes sense to you <grin>. Actually it is not
that bad, Just add the paths and the filenames into the script
where comments say and run it. (see below tho)
>
> > I am in the process of adding Multi File support [original
> > script by Erik Olson (olsone@interport.net)] and fixing
> > some of the more obvious errors.
>
> Good.
>
> > Any one else interested or willing to put some time into
> > making Mac versions?
>
> I tried to write a LDraw renderer for Macs, but I simply
> don't understand the Mac's filesystem interactions well
> enough to get it to work as I intended.
>
> Play well,
I have converted all the ldraw Parts directory to qdraw3d files
you can take a look on my test-server at
ftp://24.113.91.23/pub/lego_parts/3dmf
Copy of my mods to Erik's PL script is in the lego_parts directory above.
(change output File type from TEXT/MPS to 3DMF/ttxt or use 3DConvert_1.0d5)
All are 3dmf-text format right from Erik's script with only a few
changes to the original script.
1. Reversed Base Matrix as it created them inside out.
2. No lines or hint lines
3. added Transparency and some shading tricks.
Problems encountered so far
* There are several winding errors in the DBS and some have *attack* poly's.
* Nested transforms push and pop G-state adding a huge memory suck.
* Nesting of the colors in ldraw is allowed and passes thru deeper colordefs
not true in qd3d or ogl, color ref above paints all below to ref.
* "Picking" takes 40 sec's on average model, again nested xforms the prob.
* Importing them(3dmf) to Bryce or Strata3D is still a problem xforms again?
I have been trying to use/move to Quesa and working on pre-xforming
as the model is built or read in. I also have application framework
for an editor but until I have some of the other problems nailed...
Thats about where I have gotten to so far.
best to all
DaveG
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Message is in Reply To:
 | | Re: Lego capable CAD software for the Mac ?
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| DaveG: [ LDraw'ing on Mac ] (...) I wasn't aware of that. Can you write an explanation of what to do (I am very uneducated when it comes to Macs), so I can add it to the LDraw FAQ (and get LDraw on my current desktop machine)? (...) Good. (...) I (...) (25 years ago, 14-Dec-99, to lugnet.cad)
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