[vtkusers] Fwd: VTK is completely Slow

[Thiago Macedo]

Hi David,

Would it make impossible to select each 3D entity? I mean, now I'm
able to select a cylinder and not all the objects.
Using just one mapper/actor will I be able to keep this selection?

Regards

On Tue, Jul 19, 2011 at 3:18 PM, David Doria <daviddoria at gmail.com> wrote:
> On Tue, Jul 19, 2011 at 2:15 PM, Thiago Macedo <tmacedo29 at gmail.com> wrote:
>> Hi,
>>
>> I'm developing a CAD based software. At some point, the
>> app converts the 2D drawing into a 3D huge scene.
>> The main problem is: It's very slow!
>> I'm not using any complex algorithm neither complex structure. The
>> 'translation' between 2D and 3D is very fast, and creates basic
>> geometries. E.g..:
>> A hydraulic tube is converted into a cylinder (vtkCylinderSource), the
>> connection between 2 hydraulic tubes is a sphere (vtkSphereSource);
>> A 2D line is converted into a 3D line (vtkLine)
>> All of 3D entities has a mapper and an actor.
>> I'm working with a lot of (closer than million) 2D entities, and the
>> 3D scene is totally slow.
>> I've tried to use all tips wrote in the wiki (
>> http://www.vtk.org/Wiki/VTK/FAQ - How to handle large data sets in VTK
>> ) and I have just a little improvement.
>> I searched into the books (v5) and was not able to find anything to
>> help me. I think it should be faster if I use simple structures like
>> cylinders and lines like I'm doing.
>> Is there a way to make it faster?
>>
>> Thank you in Advance
>> Best Regards
>>
>> --
>> Thiago B. Macedo
>
> "All of 3D entities has a mapper and an actor."
>
> I think that may be your problem. I would try useing the AppendFilter
> (http://www.vtk.org/Wiki/VTK/Examples/Cxx/Filters/AppendFilter) to
> create a single data set that you can create a single mapper/actor
> from.
>
> See if that help and let us know.
>
> David
>



-- 
Thiago B. Macedo

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