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<div class="moz-cite-prefix">working with PointData worked finally.
This was actually what I wanted.<br>
Thank you very much for your help<br>
<br>
<br>
Am 13.04.2013 20:34, schrieb Bill Lorensen:<br>
</div>
<blockquote
cite="mid:CADZJ4hPWT5+bjFYvSyJrHvneGb6mwRtfJsjBvD2cnWT=TyKTQA@mail.gmail.com"
type="cite">
<div dir="ltr">// vtkCellDataToPointData is a filter that
transforms cell data (i.e., data<br>
// specified per cell) into point data (i.e., data specified at
cell<br>
// points). The method of transformation is based on averaging
the data<br>
// values of all cells using a particular point. Optionally, the
input cell<br>
// data can be passed through to the output as well<br>
<br>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Fri, Apr 12, 2013 at 8:33 AM, Bill
Lorensen <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:bill.lorensen@gmail.com" target="_blank">bill.lorensen@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Marc,
<div><br>
</div>
<div>I'm pretty sure is works with PointData and not
CellData.</div>
<span class="HOEnZb"><font color="#888888">
<div>
<br>
</div>
<div>Bill</div>
</font></span></div>
<div class="HOEnZb">
<div class="h5">
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Fri, Apr 12, 2013 at 7:08
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 text="#000000" bgcolor="#FFFFFF">
<div>This is exactly what I want thanks!<br>
<br>
It just doesnt take my scalar values to build
regions<br>
<br>
i have scalar values like e.g.<br>
<table
style="border-collapse:collapse;width:60pt"
width="80" border="0" cellpadding="0"
cellspacing="0">
<colgroup><col style="width:60pt" width="80">
</colgroup><tbody>
<tr style="min-height:15.0pt" height="20">
<td style="min-height:15.0pt;width:60pt"
height="20" width="80" align="right">3548</td>
</tr>
<tr style="min-height:15.0pt" height="20">
<td style="min-height:15.0pt"
height="20" align="right">3548</td>
</tr>
<tr style="min-height:15.0pt" height="20">
<td style="min-height:15.0pt"
height="20" align="right">3549</td>
</tr>
<tr style="min-height:15.0pt" height="20">
<td style="min-height:15.0pt"
height="20" align="right">3549</td>
</tr>
<tr style="min-height:15.0pt" height="20">
<td style="min-height:15.0pt"
height="20" align="right">3549</td>
</tr>
<tr style="min-height:15.0pt" height="20">
<td style="min-height:15.0pt"
height="20" align="right">3549</td>
</tr>
<tr style="min-height:15.0pt" height="20">
<td style="min-height:15.0pt"
height="20" align="right">3549</td>
</tr>
<tr style="min-height:15.0pt" height="20">
<td style="min-height:15.0pt"
height="20" align="right">3549</td>
</tr>
<tr style="min-height:15.0pt" height="20">
<td style="min-height:15.0pt"
height="20" align="right">3550</td>
</tr>
<tr style="min-height:15.0pt" height="20">
<td style="min-height:15.0pt"
height="20" align="right">3550</td>
</tr>
</tbody>
</table>
<br>
for each value I want to create regions if
there is a connection<br>
my problem is, that I just get 1 big region,
but depending on my values i should get about
100 regions<br>
<br>
My Code:<br>
<br>
polydata->GetCellData()->SetScalars(arr);
//arr contains my scalars for each cell (Type:
vtkFloatArray)<br>
vtkSmartPointer<vtkPolyDataConnectivityFilter>
regionFilter =
vtkSmartPointer<vtkPolyDataConnectivityFilter>::New();<br>
regionFilter->SetInputConnection(polydata->GetProducerPort());<br>
regionFilter->ScalarConnectivityOn(); <br>
regionFilter->SetFullScalarConnectivity(1);<br>
regionFilter->SetScalarRange(1,9090);<br>
regionFilter->SetExtractionModeToAllRegions();
<br>
regionFilter->SetColorRegions(1);<br>
regionFilter->Update();<br>
vtkSmartPointer<vtkPolyDataMapper>
conMapper =
vtkSmartPointer<vtkPolyDataMapper>::New();<br>
conMapper->SetInputConnection(regionFilter->GetOutputPort());<br>
conMapper->Update();<br>
stlActor->SetMapper(conMapper);<br>
<br>
RenderData(stlActor); //my function for
rendering<br>
<br>
<br>
<br>
Am 11.04.2013 18:07, schrieb Bill Lorensen:<br>
</div>
<div>
<div>
<blockquote type="cite">
<div dir="ltr">There is a "region growing"
filter in VTK.
<div>
<div>// .NAME
vtkPolyDataConnectivityFilter -
extract polygonal data based on
geomet\</div>
<div>ric connectivity
</div>
<div>// .SECTION Description
</div>
<div>// vtkPolyDataConnectivityFilter
is a filter that extracts cells that
</div>
<div>// share common points and/or
satisfy a scalar threshold
</div>
<div>// criterion. (Such a group of
cells is called a region.) The
filter </div>
<div>// works in one of six ways: 1)
extract the largest (most points)
connected reg\</div>
<div>ion
</div>
<div>// in the dataset; 2) extract
specified region numbers; 3) extract
all </div>
<div>// regions sharing specified
point ids; 4) extract all regions
sharing </div>
<div>// specified cell ids; 5) extract
the region closest to the specified
</div>
<div>// point; or 6) extract all
regions (used to color regions).
</div>
<div>// </div>
</div>
<div><br>
</div>
<div><br>
</div>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote"> On Thu, Apr
11, 2013 at 11:13 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 text="#000000"
bgcolor="#FFFFFF">
<div>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>
<div>
<div>
<blockquote 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>Are you trying to
compute something? Maybe
if we know what the
final problem is we can
provide some ideas.</div>
<div><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><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>
<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>
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<span><font color="#888888">
<pre cols="72">--
Best regards / Mit freundlichen Grüßen
Marc Huber</pre>
</font></span></div>
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<pre cols="72">--
Best regards / Mit freundlichen Grüßen
Marc Huber</pre>
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