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 CAD / Ray-Tracing / 1444
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Subject: 
Re: Weird Logo Issue at L3P Quality Level 3
Newsgroups: 
lugnet.cad.ray
Date: 
Fri, 6 Sep 2002 15:22:40 GMT
Viewed: 
684 times
  
In lugnet.cad.ray, richard marchetti wrote:

In lugnet.cad.ray, Travis Cobbs writes:
This is due to a mirror matrix being used somewhere in the part.  The final
matrix that represents that stud is mirrored (meaning either 1 or 3 of the
axes are flipped).  You should get the same problem if you render both of
the classic space wing pieces.  One of them will have correct logos, the
other won't, because one of the files is just a reference to the other with
a mirror matrix applied.

Hmmm, I am trying to understand what you are stating here as applies to
parts authoring.  I get it if you mean that someone manually mirrored
aspects of the DAT file without regard to how the stud would turn out at L3P
quality level 3 -- so I get it with the wing DATs. [I am currently in the
last stages of authoring those 2x4 wedge plates and bricks.  This
information is critically relevant to my situation.]

But, it should be noted that the engine centre isn't that kind of element.
It's an element to itself, without a mirrored element with which it is
commonly paired.

But the stud subfile was mirrored.  At the lowest level, the ldraw
system doesn't differentiate parts, models, primitives, etc.  It just
knows about files.  So mirroring a stud primitive is logically identical
to mirroring an entire part.

BTW, I've submitted a fixed version of 4869 to the PT.  It correctly
rotates the stud, instead of mirroring it.

Steve



Message is in Reply To:
  Re: Weird Logo Issue at L3P Quality Level 3
 
(...) Hmmm, I am trying to understand what you are stating here as applies to parts authoring. I get it if you mean that someone manually mirrored aspects of the DAT file without regard to how the stud would turn out at L3P quality level 3 -- so I (...) (22 years ago, 6-Sep-02, to lugnet.cad.ray)

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