<html>
<head>
<meta content="text/html; charset=windows-1252"
http-equiv="Content-Type">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<div class="moz-cite-prefix">i want to divide objects into polygons
(regions) which point in a very similiar direction.<br>
<br>
I have computed normal vectors for the points of the object.<br>
now i want to extend a method of image processing to 3D.<br>
in an image i'm growing regions with similar color values starting
from different seed points.<br>
this i want to apply in a changed way to the 3D space<br>
my normal vectors are my "color values" and I want to iterate
through the 3D space to grow regions.<br>
<br>
if i have no regular spacing between the points i might get
problems<br>
<br>
<br>
<br>
Am 11.04.2013 16:44, schrieb Bill Lorensen:<br>
</div>
<blockquote
cite="mid:CADZJ4hM+dUKwNant1pDeN2UKaw7oF1Smm9J_LHA9r82cpu36TQ@mail.gmail.com"
type="cite">
<div dir="ltr">You could create a volume of distances to the
triangles. The distance field will have regular spacing in x,y,z
but the x,y,z value will be distance to the surface.
<div><br>
</div>
<div style="">Are you trying to compute something? Maybe if we
know what the final problem is we can provide some ideas.</div>
<div style=""><br>
</div>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Thu, Apr 11, 2013 at 8:54 AM, Marc
Huber <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:marchuber.hft@gmx.de" target="_blank">marchuber.hft@gmx.de</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div style="font-family:Verdana;font-size:12.0px">
<div>unfortunatelly not. I need it and hoped that vtk is
able to do this.</div>
<div>I have to iterate through point clouds with a
regular spacing like iterating through pixels of an
image. So in fact I don't even need te visualization,
just the point cloud extracted from the visualization.</div>
<div> </div>
<div>thanks for your help<br>
</div>
<div>Best regards<br>
Marc</div>
<div>
<div>
<div name="quote" style="margin:10px 5px 5px
10px;padding:10px 0 10px 10px;border-left:2px
solid #c3d9e5;word-wrap:break-word">
<div style="margin:0 0 10px 0"><b>Gesendet:</b> Donnerstag,
11. April 2013 um 14:45 Uhr
<div class="im"><br>
<b>Von:</b> "Bill Lorensen" <<a
moz-do-not-send="true"
href="mailto:bill.lorensen@gmail.com"
target="_blank">bill.lorensen@gmail.com</a>><br>
<b>An:</b> "Marc Huber" <<a
moz-do-not-send="true"
href="mailto:marchuber.hft@gmx.de"
target="_blank">marchuber.hft@gmx.de</a>><br>
<b>Cc:</b> "VTK Users" <<a
moz-do-not-send="true"
href="mailto:vtkusers@vtk.org"
target="_blank">vtkusers@vtk.org</a>><br>
</div>
<b>Betreff:</b> Re: Re: [vtkusers] TIN to
regular mesh</div>
<div>
<div class="h5">
<div name="quoted-content">
<div>I don't know of a vtk filter that does
this.
<div> </div>
<div>Do you have a reference for an
algorithm that does this?</div>
<div> </div>
</div>
<div class="gmail_extra">
<div class="gmail_quote">On Thu, Apr 11,
2013 at 8:43 AM, Marc Huber <span><<a
moz-do-not-send="true"
href="http://marchuber.hft@gmx.de"
target="_blank">marchuber.hft@gmx.de</a>></span>
wrote:
<blockquote class="gmail_quote"
style="margin:0 0 0
0.8ex;border-left:1.0px
rgb(204,204,204)
solid;padding-left:1.0ex">
<div>
<div
style="font-family:Verdana;font-size:12.0px">
<div> </div>
<div>Sorry for leaving so much
unclear.</div>
<div>I have closed volumes e.g. a
CAD model of a pipe<br>
</div>
<div>Best regards<br>
Marc Huber</div>
<div>
<div>
<div style="margin:10.0px
5.0px 5.0px
10.0px;padding:10.0px 0
10.0px
10.0px;border-left:2.0px
solid rgb(195,217,229)">
<div style="margin:0 0
10.0px 0"><b>Gesendet:</b> Donnerstag,
11. April 2013 um 14:22
Uhr<br>
<b>Von:</b> "Bill
Lorensen" <<a
moz-do-not-send="true"
href="http://bill.lorensen@gmail.com"
target="_blank">bill.lorensen@gmail.com</a>><br>
<b>An:</b> "Marc Huber"
<<a
moz-do-not-send="true"
href="http://marchuber.hft@gmx.de"
target="_blank">marchuber.hft@gmx.de</a>><br>
<b>Cc:</b> "VTK Users"
<<a
moz-do-not-send="true"
href="http://vtkusers@vtk.org"
target="_blank">vtkusers@vtk.org</a>><br>
<b>Betreff:</b> Re:
[vtkusers] TIN to regular
mesh</div>
<div>
<div>
<div>
<div>What source of
object is being
modeled? Is it a
closed volume? An
elevation map?</div>
<div
class="gmail_extra">
<div
class="gmail_quote">On
Thu, Apr 11, 2013
at 2:09 AM, Marc
Huber <span><<a
moz-do-not-send="true" href="http://marchuber.hft@gmx.de"
target="_blank">marchuber.hft@gmx.de</a>></span>
wrote:
<blockquote
class="gmail_quote"
style="margin:0
0 0
0.8ex;border-left:1.0px
rgb(204,204,204)
solid;padding-left:1.0ex">
<div>
<div>I need a
quad mesh
where the
point distance
in x and y
direction is
always the
same.<br>
<div>Best
regards</div>
<div>Marc</div>
<div> </div>
</div>
<div><br>
Am 10.04.2013
um 21:52
schrieb Bill
Lorensen <<a
moz-do-not-send="true" href="http://bill.lorensen@gmail.com"
target="_blank">bill.lorensen@gmail.com</a>>:<br>
</div>
<div>
<div>
<blockquote>
<div>
<div>What is
your
definition of
"regular
mesh"? A
regular
triangular
mesh is one
where each
element has 3
edges and the
valence of
each interior
point is 6. A
regular quad
mesh is one
where each
element has 4
edges and the
valens of
interior
points is 4.<br>
<br>
</div>
<div
class="gmail_extra">
<div
class="gmail_quote">On
Wed, Apr 10,
2013 at 11:50
AM, Marc Huber
<span><<a
moz-do-not-send="true"
href="http://marchuber.hft@gmx.de" target="_blank">marchuber.hft@gmx.de</a>></span>
wrote:
<blockquote
class="gmail_quote"
style="margin:0
0 0
0.8ex;border-left:1.0px
rgb(204,204,204)
solid;padding-left:1.0ex">
<div>
<div
style="font-family:Verdana;font-size:12.0px">
<div>
<div>Hi,</div>
<div> </div>
<div>I have a
CAD model,
which is
triangulated.
What I'd like
to do is to
create a
regular mesh
of it.</div>
<div>I already
searched in
the archives
and found out
that it might
help to use
shepard. I
awfully don't
get it managed
to solve this
problem. Maybe
I’m also just
searching with
the wrong
keywords.</div>
<div>Has maybe
somebody some
example code
for this? (if
c++, tcl,
python,...
doesn't
matter)</div>
<div> </div>
<div>I'd be
very thankful
if anybody
could help me.</div>
<div> </div>
</div>
<div>Best
regards<br>
<span><font
color="#888888">Marc</font></span></div>
</div>
</div>
<br>
_______________________________________________<br>
Powered by <a
moz-do-not-send="true" href="http://www.kitware.com" target="_blank">www.kitware.com</a><br>
<br>
Visit other
Kitware
open-source
projects at <a
moz-do-not-send="true"
href="http://www.kitware.com/opensource/opensource.html"
target="_blank">http://www.kitware.com/opensource/opensource.html</a><br>
<br>
Please keep
messages
on-topic and
check the VTK
FAQ at: <a
moz-do-not-send="true"
href="http://www.vtk.org/Wiki/VTK_FAQ" target="_blank">http://www.vtk.org/Wiki/VTK_FAQ</a><br>
<br>
Follow this
link to
subscribe/unsubscribe:<br>
<a
moz-do-not-send="true"
href="http://www.vtk.org/mailman/listinfo/vtkusers" target="_blank">http://www.vtk.org/mailman/listinfo/vtkusers</a><br>
</blockquote>
</div>
<br>
<br
clear="all">
<br>
--<br>
Unpaid intern
in
BillsBasement
at noware dot
com</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
<div> </div>
--<br>
Unpaid intern in
BillsBasement at
noware dot com</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<div> </div>
--<br>
Unpaid intern in BillsBasement at noware
dot com</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<br>
<br clear="all">
<div><br>
</div>
-- <br>
Unpaid intern in BillsBasement at noware dot com<br>
</div>
</blockquote>
<br>
<br>
<pre class="moz-signature" cols="72">--
Best regards / Mit freundlichen Grüßen
Marc Huber</pre>
</body>
</html>