[vtkusers] Strange problem - All of my triangle mesh is not displayed (Bug? )

[Amy Henderson]

Are the points on the bottom of your object used in any cells?  If you are 
expecting these points on the bottom of your polydata object to be 
displayed as points (not vertices of a polygon), then you need to add a 
vtkVertex for each of the ones to be displayed this way.

- Amy Henderson

At 04:27 PM 2/6/2003 +0100, Karlsson Erik wrote:

>Hi all!
>I have a really strange problem. I have about 500 000 points and I use a 
>vtkCellArray to make a triangle mesh that I put in a vtkPolyData object. 
>When I render my scene the bottom of my object is not showing. The strange 
>thing is that if I use a vtkLODActor instead of a normal actor, I can see 
>the missing part of my mesh when the whole actor is shown as a point could 
>while rotating/zooming the object. So I know for a fact that all the 
>points have been inserted to the PolyData object.  But as soon as I stop 
>interacting with the scene and the object is rendered with triangles 
>again, the bottom disappears. I also tried using the vtkDecimatePro to 
>decimate the PolyData object about 10% and now I can see all of my 
>triangles. Is there some kind of a limit to the number of triangles that 
>can be displayed or the number of points that can be used? Can it be a 
>hardware issue? Does anyone have the slightest idea?
>
>Can someone please help me shed I light on this - I have been struggling 
>with this problem for about a week now... :-/
>By the way - I'm using vtk 4.02, MSVC++ 6.0 MFC. My graphics card is a 
>Geforce2 MX (latest drivers)
>
>Thanks in advance!
>
>Best regards,
>Erik Karlsson
>
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