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<div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hi Prof. Remacle,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Thanks for the response.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I’ve attached copies of IGES files
and output meshes from GMSH. The “test1” files show the issue with
scaling whereas the “test2” files do not. I used units of meters
in Rhino for the “test1” file and millimeters for the “test2”
files. It appears that there is a default setting of millimeters somewhere in
the OpenCascade routines that causes the problem that I’ve observed. I
should be able to complete my current task, but it would be nice to have a
better understanding of the default values and limitations of the CAD model.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Best regards,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Bill<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> Jean-Francois
Remacle [mailto:jean-francois.remacle@uclouvain.be] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, April 15, 2010
12:56 PM<br>
<b><span style='font-weight:bold'>To:</span></b> Bill Milewski<br>
<b><span style='font-weight:bold'>Cc:</span></b> <st1:PersonName w:st="on">gmsh@geuz.org</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Gmsh] Geometric
scaling of STP files</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Le 14-avr.-10 à 22:47, Bill Milewski a écrit :<o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
<br>
<o:p></o:p></span></font></p>
<span style='orphans: 2;text-align:auto;widows: 2;-webkit-border-horizontal-spacing: 0px;
-webkit-border-vertical-spacing: 0px;-webkit-text-decorations-in-effect: none;
-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:
0px'>
<div link=blue vlink=purple>
<div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Hi,<u1:p></u1:p></span></font><font
color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'><u1:p> </u1:p></span></font><font
color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>I recently started working with GMSH and
have encountered odd behaviors related to scaling geometry imported from
Rhinoceros CAD via STEP or IGES files. I have not seen anything in the
FAQ or Wiki related to these issues.<u1:p></u1:p></span></font><font
color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'><u1:p> </u1:p></span></font><font
color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<ol style='margin-top:0in' start=1 type=1>
<li class=MsoNormal style='color:black;mso-list:l1 level1 lfo4'><font size=2
color=black face=Arial><span style='font-size:10.0pt;font-family:Arial'>Where
is the default geometric scale factor set? (I am using the GUI
initially.) The coordinates in the STEP file are consistent with my
CAD model. When I save GEO and MSH files from gmsh the coordinates
all seem to be scaled by a factor of 1000 for one model. However,
for a second model the scale is correct.</span></font><o:p></o:p></li>
</ol>
</div>
</div>
</span>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>We use the OpenCascade STEP import. Maybe we missed something related
to units. Can you give us examples<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>of such problematic behavior ?<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
<br>
<o:p></o:p></span></font></p>
<span style='orphans: 2;text-align:auto;widows: 2;-webkit-border-horizontal-spacing: 0px;
-webkit-border-vertical-spacing: 0px;-webkit-text-decorations-in-effect: none;
-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:
0px'><u1:p></u1:p>
<div link=blue vlink=purple>
<div>
<ol style='margin-top:0in' start=1 type=1>
<li class=MsoNormal style='color:black;mso-list:l0 level1 lfo5'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt'><o:p> </o:p></span></font></li>
<li class=MsoNormal style='color:black;mso-list:l0 level1 lfo5'><font size=2
color=black face=Arial><span style='font-size:10.0pt;font-family:Arial'>Does
the Bspline algorithm handle non-uniform weights, repeated control points
and multiple internal knots correctly? I have a body of revolution,
with singularities at the poles, that seems to behave in a funny way.<u1:p></u1:p></span></font><o:p></o:p></li>
</ol>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'><u1:p> </u1:p></span></font><font
color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
</div>
</div>
</span>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I guess OpenCascade supports NURBS ;-)<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Yet, singularities in mappings may result in problematic behaviors in
meshers. Gmsh's meshers<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>make use of surface metrics that are typically singular at poles. We
try to do our best, and some<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>enhancements in the meshers are scheduled for removing singularities
(you can try compound <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>surfaces for that , and there is a wiki !!)<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>JFR<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
<br>
<o:p></o:p></span></font></p>
<span style='orphans: 2;text-align:auto;widows: 2;-webkit-border-horizontal-spacing: 0px;
-webkit-border-vertical-spacing: 0px;-webkit-text-decorations-in-effect: none;
-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:
0px'>
<div link=blue vlink=purple>
<div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Best regards,<u1:p></u1:p></span></font><font
color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'><u1:p> </u1:p></span></font><font
color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Bill<u1:p></u1:p></span></font><font
color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'><u1:p> </u1:p></span></font><font
color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><i><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black;font-style:italic'>Bill Milewski, Ph.D.<u1:p></u1:p></span></font></i><font
color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'><u1:p> </u1:p><o:p></o:p></span></font></p>
</div>
</div>
<p class=MsoNormal><font size=4 color=black face=Helvetica><span
style='font-size:13.5pt;font-family:Helvetica;color:black'>_______________________________________________<br>
gmsh mailing list<br>
<a href="mailto:gmsh@geuz.org">gmsh@geuz.org</a><br>
<a href="http://www.geuz.org/mailman/listinfo/gmsh">http://www.geuz.org/mailman/listinfo/gmsh</a><o:p></o:p></span></font></p>
</div>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'></span><o:p> </o:p></span></font></p>
<div><span style='orphans: 2;text-align:auto;widows: 2;-webkit-border-horizontal-spacing: 0px;
-webkit-border-vertical-spacing: 0px;-webkit-text-decorations-in-effect: none;
-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:
0px'><span style='orphans: 2;widows: 2;-webkit-border-horizontal-spacing: 0px;
-webkit-border-vertical-spacing: 0px;-webkit-text-decorations-in-effect: none;
-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:
0px'>
<div style='word-wrap: break-word;-webkit-nbsp-mode: space;-webkit-line-break: after-white-space'>
<div>
<div style='word-wrap: break-word;-webkit-nbsp-mode: space;-webkit-line-break: after-white-space'>
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<div>
<p class=MsoNormal><font size=4 color=black face=Helvetica><span
style='font-size:13.5pt;font-family:Helvetica;color:black'>------------------------------------------------------------------<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><span class=apple-style-span><font size=1 color=black
face=Helvetica><span style='font-size:9.0pt;font-family:Helvetica;color:black'>Prof.
Jean-Francois Remacle</span></font></span><font size=4 color=black
face=Helvetica><span style='font-size:13.5pt;font-family:Helvetica;color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><span class=apple-style-span><font size=1 color=black
face=Helvetica><span style='font-size:9.0pt;font-family:Helvetica;color:black'>Universite
catholique de <st1:City w:st="on"><st1:place w:st="on">Louvain</st1:place></st1:City>
(UCL)</span></font></span><font size=4 color=black face=Helvetica><span
style='font-size:13.5pt;font-family:Helvetica;color:black'><o:p></o:p></span></font></p>
</div>
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<p class=MsoNormal><span class=apple-style-span><font size=1 color=black
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