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Subject: 
Re: Quick way to mirror-image a model?
Newsgroups: 
lugnet.cad
Date: 
Thu, 17 Jun 2004 15:39:49 GMT
Viewed: 
1875 times
  
In lugnet.cad, Don Heyse wrote:

I apologize if my explanation is unclear, but I can attest to the
effectiveness of the method, because I've used it dozens of times
for model files and for new partfiles.  Let me know if you'd like
clarification on any point.

This is silly.  Just put the structure you want to mirror in a
subfile and do this.

  1 0 0 0 0 1 0 0 0 1 0 0 0 1 subfile.ldr
  1 0 320 0 0 -1 0 0 0 1 0 0 0 1 subfile.ldr

You can do it in ldglite using the scale by (-1,1,1) command (just
like in POV).  Then use your favorite CAD program to position the part
and it's mirror wherever you want them.  If you like, inline them
both.  That'll generate pictures that look correct.  The only problem
will be if you use the LDR file to generate an inventory list and you
have distinct left and right parts like wing plates.

Won't that cause all of the LEGO logo on all of the studs in the mirrored parts
to be reversed?  I thought that part of the point of the question was to avoid
that.  I think that measures are being taken to correct the mirrored-logo issue,
but I'd prefer a more organic solution instead.  YMMV.

Also, no kidding you can create a sub-file and do a matrix switcheroo to mirror
it, but what if you want to have slight modifications to each of the four castle
towers?  Your method won't help at all in that case, unless you wanted to create
four separate sub-files, altering each as desired, and then inlining them, but
that doesn't seem an appreciably better solution that what I proposed.  Using my
method, the whole mirrored tower is accessible for modification, and you don't
have to worry about mirroring any complex structures, since you'll be building
them in true orientation.

While I'm at it, your method will certainly work to an extent, but the method I
described has the benefit of functioning without inlined sub-files, and it works
just as well it partfiles or model files.

If this method seems silly to you, may I suggest that you not use it?

Dave!



Message has 2 Replies:
  Re: Quick way to mirror-image a model?
 
In lugnet.cad, Dave Schuler wrote: [snip] (...) Bad choice of words "silly". Sorry about that, but he asked for a "quick" way to do it. He used the word "quick" twice in fact. But everyone seemed intent on providing a thorough, but complex method (...) (20 years ago, 17-Jun-04, to lugnet.cad)
  Re: Quick way to mirror-image a model?
 
(...) If this bothers you, a partial solution is here: (URL) the results from running the program aren't really appropriate for distribution to others, you can at least do your own POV renderings (as long as you don't use -lgeo). Additionally, the (...) (20 years ago, 17-Jun-04, to lugnet.cad)

Message is in Reply To:
  Re: Quick way to mirror-image a model?
 
(...) L (...) This is silly. Just put the structure you want to mirror in a subfile and do this. 1 0 0 0 0 1 0 0 0 1 0 0 0 1 subfile.ldr 1 0 320 0 0 -1 0 0 0 1 0 0 0 1 subfile.ldr You can do it in ldglite using the scale by (-1,1,1) command (just (...) (20 years ago, 17-Jun-04, to lugnet.cad)

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