<br><font size=2 face="sans-serif">Hi,</font>
<br>
<br><font size=2 face="sans-serif">You could use the vtkMultiBlockDataSet
structure with one block per object (look at the </font><font size=3>vtkMultiBlockMergeFilter
</font><font size=2 face="sans-serif">to merge your objects into one vtkMultiBlockDataSet
). </font>
<br><font size=2 face="sans-serif">You will then have only one actor per
vtkMultiBlockDataSet, which can speed up your rendering. </font>
<br><font size=2 face="sans-serif">You can still individually select one
block from a multiblock.<br>
</font>
<br><font size=2 face="sans-serif">Stephane<br>
<br>
</font>
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<td><font size=1 face="sans-serif"> </font>
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<td><font size=1 color=#ff8100 face="Arial"><b>Stephane PLOIX</b></font><font size=1 color=#ff8100 face="Arial"><b><br>
Pilote Opérationnel - Visualisation scientifique</b></font><font size=1 color=#0062e1 face="Arial"><br>
EDF - R&D<br>
SINETICS<br>
1, Av du Général de Gaulle<br>
92140 Clamart</font><font size=1 color=#0062e1 face="sans-serif"><br>
</font>
<br><font size=1 color=#0062e1 face="Arial"><b>stephane.ploix@edf.fr</b></font>
<br><font size=1 color=#0062e1 face="Arial">Tél. : +33 (0) 1 47 65 51
10</font>
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<td><font size=1 color=#0062e1 face="Arial">Un geste simple pour l'environnement,
n'imprimez ce message que si vous en avez l'utilité.</font></table>
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<td width=40%><font size=1 face="sans-serif"><b>tmacedo29@gmail.com</b>
</font>
<br><font size=1 face="sans-serif">Envoyé par : vtkusers-bounces@vtk.org</font>
<p><font size=1 face="sans-serif">19/07/2011 21:10</font>
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<div align=right><font size=1 face="sans-serif">A</font></div>
<td><font size=1 face="sans-serif">daviddoria@gmail.com</font>
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<div align=right><font size=1 face="sans-serif">cc</font></div>
<td><font size=1 face="sans-serif">vtkusers@vtk.org</font>
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<td>
<div align=right><font size=1 face="sans-serif">Objet</font></div>
<td><font size=1 face="sans-serif">Re: [vtkusers] Fwd: VTK is completely
Slow</font></table>
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<br><tt><font size=2>Hi David,<br>
<br>
Would it make impossible to select each 3D entity? I mean, now I'm<br>
able to select a cylinder and not all the objects.<br>
Using just one mapper/actor will I be able to keep this selection?<br>
<br>
Regards<br>
<br>
On Tue, Jul 19, 2011 at 3:18 PM, David Doria <daviddoria@gmail.com>
wrote:<br>
> On Tue, Jul 19, 2011 at 2:15 PM, Thiago Macedo <tmacedo29@gmail.com>
wrote:<br>
>> Hi,<br>
>><br>
>> I'm developing a CAD based software. At some point, the<br>
>> app converts the 2D drawing into a 3D huge scene.<br>
>> The main problem is: It's very slow!<br>
>> I'm not using any complex algorithm neither complex structure.
The<br>
>> 'translation' between 2D and 3D is very fast, and creates basic<br>
>> geometries. E.g..:<br>
>> A hydraulic tube is converted into a cylinder (vtkCylinderSource),
the<br>
>> connection between 2 hydraulic tubes is a sphere (vtkSphereSource);<br>
>> A 2D line is converted into a 3D line (vtkLine)<br>
>> All of 3D entities has a mapper and an actor.<br>
>> I'm working with a lot of (closer than million) 2D entities, and
the<br>
>> 3D scene is totally slow.<br>
>> I've tried to use all tips wrote in the wiki (<br>
>> http://www.vtk.org/Wiki/VTK/FAQ - How to handle large data sets
in VTK<br>
>> ) and I have just a little improvement.<br>
>> I searched into the books (v5) and was not able to find anything
to<br>
>> help me. I think it should be faster if I use simple structures
like<br>
>> cylinders and lines like I'm doing.<br>
>> Is there a way to make it faster?<br>
>><br>
>> Thank you in Advance<br>
>> Best Regards<br>
>><br>
>> --<br>
>> Thiago B. Macedo<br>
><br>
> "All of 3D entities has a mapper and an actor."<br>
><br>
> I think that may be your problem. I would try useing the AppendFilter<br>
> (http://www.vtk.org/Wiki/VTK/Examples/Cxx/Filters/AppendFilter) to<br>
> create a single data set that you can create a single mapper/actor<br>
> from.<br>
><br>
> See if that help and let us know.<br>
><br>
> David<br>
><br>
<br>
<br>
<br>
-- <br>
Thiago B. Macedo<br>
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