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Subject: 
Re: Stl2dat merging plane triangles and quads to uniform surface?
Newsgroups: 
lugnet.cad.dev
Date: 
Mon, 23 Jun 2008 16:01:50 GMT
Viewed: 
9968 times
  
In lugnet.cad.dev, Marc Klein wrote:
authoring this part http://www.ldraw.org/cgi-bin/ptdetail.cgi?f=parts/62360.dat
I tried to simulate LDraw's "ndis" primitives to ease the substitution once the
part is in dat shape. The STL preview showed the triangles at the corners of the
various cylinders but it looks like STL2DAT merges those extra triangles in one
plane surface (color 12).

http://www.holly-wood.it/tmp/Windscreen.zip

If this is true, could you add an option which outputs non-merged surfaces and
conserves the triangles?

There already exists such an option :

-o4 : no merge to quadrangles

All the options are listed here
http://marc.klein.free.fr/lego/stl2dat/stl2dat.html#howtouseit

Hi marc,

be sure I've tried all sorts of combinations but I get the triangles simulating
the ndis primitives only in one corner, while it looks like that the other
corners get merged:

http://www.holly-wood.it/tmp/Windscreen-Triangles.png

Is there something I haven't taken in consideration? BTW I use this batch:

set STL2DAT_EXE="C:\Programme\MLCad\Stl2dat\stl2dat.exe"

for %%a in ("*.stl") do %STL2DAT_EXE% "%%a" -a 22.51 -eps 0.01 -teps 0.001 -deps
0.1 -cs -o4 "%%a" "Willy Tschager [Holly Wood]"

for conversion - does a fine job.

Bye, w.



Message has 1 Reply:
  Re: Stl2dat merging plane triangles and quads to uniform surface?
 
Hi, (...) Its a tough problem ! The problem is, that stl2dat does not recalculate or modify the triangles that are in the stl file. The only thing stl2dat makes is to bind the triangles into ldraw primitives or quadrangle. To solve your problem (...) (16 years ago, 29-Jun-08, to lugnet.cad.dev)

Message is in Reply To:
  Re: Stl2dat merging plane triangles and quads to uniform surface?
 
Hi Willy (...) There already exists such an option : -o4 : no merge to quadrangles All the options are listed here (URL) Would it further be possible to mirror all points on the y-axes right away with (...) Have you considered using a subpart the (...) (16 years ago, 22-Jun-08, to lugnet.cad.dev)

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