Subject:
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Re: Stl2dat settings?
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Newsgroups:
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lugnet.cad.dat.parts
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Date:
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Sun, 25 Nov 2007 20:39:06 GMT
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Viewed:
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4456 times
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In lugnet.cad.dat.parts, Marc Klein wrote:
> Hi,
>
> > as a stl2dat toddler I'd like to know what kind of settings you use for the
> > conversion with a spot on:
> >
> > -eps value (default 0.01)
> > -teps value : minimum distance for coincidence (default 0.001)
> > -deps value : maximum determinant for coplanar quads (default 0.1)
> >
> > I use the defaults listed at Marc's site:
> >
> > http://marc.klein.free.fr/lego/stl2dat/stl2dat.html
>
> I use also the default values. In some very rare cases, i used a greater value
> for teps (EG. 0.1) when the coordinates in the stl file have to few decimals.
Could you please add this piece of info to your site, thx?
> > but still get some quads with non-coplanar vertices. I guess this can be tweaked
> > with the teps and deps values.
>
> The -deps value controls if two triangles can be merged to a quad. This value is
> related to the -det option of l3p -check
Also on this a bit of info would save the day. I experimented a bit with the
values and it would be helpful if you could explain what happens if you increase
or lower the values - also in combination with -teps.
> > In addition I'd like to know if there is a
> > workaround for the origin point. Looks like the STL's origin is the highest
> > value on all three axes - is this correct? The -o XYZ option works fine but I'd
> > rather have the STL carry the origin I want.
>
> The STL format produced by some software contains only point in the positive
> quadrant (all coordinates are strictly positive). This is because some older
> stereolithography machines could not handle negative numbers.
> There is generally an option to avoid that in the CAD software.
I was able to fix this - thx for the tip.
Now I have another question. I was trying to get rid off the primitives (I know
there is the -no1 option but I'm talking about something different). Instead of
having stl2dat baking primitives I wanna get the raw triangles, quads und cond.
lines and -nc is not giving me what I want.
Furthermore it would be helpful to have a "save as" option. I use a batch file
for the conversion and with:
for %%a in ("*.stl") do %stl2dat_exe% %%a "%%~na_with_Primitives"
for %%a in ("*.stl") do %stl2dat_exe% %%a "%%~na_without_Primitives"
for %%a in ("*.stl") do %stl2dat_exe% %%a "%%~na_colors" -c1 1 -c2 4 -c3 2
I could generate various files with various characteristics in one job.
bye, w.
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Message is in Reply To:
 | | Re: Stl2dat settings?
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| Hi, (...) for teps (EG. 0.1) when the coordinates in the stl file have to few decimals. (...) The -deps value controls if two triangles can be merged to a quad. This value is related to the -det option of l3p -check (...) The STL format produced by (...) (17 years ago, 9-Nov-07, to lugnet.cad.dat.parts)
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