[vtkusers] How to 'best' visualize meshed objects with VTK?

[Petr Lorenz]

Thank you for the hints.

I have now solved the problem by creating one vtkPolyData object for 
each discretized object and drawing there the cubes of the object as 
polygons (6 faces for each cube). In this way I have only as many actors 
as I have objects and things are much faster.

I find also interesting the idea of using surface rendering. As I am not 
so deep in VTK yet, could you provide me with a simple example, or a 
hint where to look, on how this can be done? Will this render the 
surface of an object only?

Thank you.

Petr

Am 04.04.11 15:35, schrieb David E DeMarle:
> Also, avoid using many actors whenever possible. Besides volume
> rendering, consider using a threshold filter to remove the empty cells
> and then use simple surface rendering to show the rest.
>
> David E DeMarle
> Kitware, Inc.
> R&D Engineer
> 28 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-371-3971 x109
>
>
>
> 2011/4/4 Dženan Zukić<dzenanz at gmail.com>:
>> Is volume rendering applicable to your case?
>> HTH
>>
>> On Tue, Mar 29, 2011 at 17:45, Petr Lorenz<petr.lorenz at ieee.org>  wrote:
>>> Hello,
>>>
>>> I have a mesh = rectilinear grid, and objects meshed in this grid. To each
>>> "cell" of the grid either an object is assigned, or the cell is left empty.
>>> Now I want to visualize the non-empty cells with differently colored cubes
>>> (cells) with a color corresponding to specific objects.
>>>
>>> The primitive way I used for the visualization is to create a
>>> vtkCubeSource->vtkPolyDataMapper->vtkActor pipeline for each non-empty cell
>>> and see in this way the meshed objects. However, the number of cells in a
>>> typical mesh is about 1.000.000 with ca. 100.000 non-empty cells, which
>>> results in very large processing time of VTK making any interactive usage
>>> impossible.
>>>
>>> Does anybody have an idea how to do the visualization in a better way? Can
>>> I maybe somehow use glyphing?
>>>
>>> Many thanks!
>>> Petr
>>>
>>>
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