[vtkusers] image flickering..?

[Louis Desjardins]

Thanks Amy,

I tried that and it helped a bit, i.e. I now see solid lines instead of them 
flickering.
However it appears that my box is continuously changing its size for some 
reason (very slightly though), thought it shouldnt' be..  Its actually a 
PlaneSource and I use FeatureEdges to outline this plane,  and I'm 
continuously changing the normal to this plane and at the same time moving 
my camera position and focal point along with the plane normal to make it 
appear like the Plane is at a fixed position (for example if I'm 
rollerblading alongside a bike at exactly the same speed, then it seems like 
the bike is stationary and its everything else thats moving)

So I dont know what could cause my plane to be changing so slightly.. but 
anyhow

So I am also rendering an unstructured mesh (which I have colored black) in 
the background; then the plane slices through this mesh and some data 
corresponding to what it has just sliced is color coded and rendered onto 
the plane; and then on top of that I render the plane edge using 
FeatureEdges

So the order that I render is  mesh, planesource, and edge

However sometimes its as if the mesh is slicing through the planesource or 
is overlapping it for some reason (even though mesh should be rendered first 
and the colorcoded planesource should be overlapping it instead)

I dont know why it does this
Does anyone have any ideas?

Thank you very much, much appreciated
LD


>From: Amy Henderson <amy.henderson at kitware.com>
>To: "Louis Desjardins" <lost_bits1110 at hotmail.com>, vtkusers at vtk.org
>Subject: Re: [vtkusers] image flickering..?
>Date: Tue, 14 Sep 2004 13:57:53 -0400
>
>Are you rendering both the box and its outline (polygons and lines)?  If 
>so, you may have coincident geometry. Try using the 
>SetResolveCoincidentTopologyToPolygonOffset() method in your mapper.  (If 
>you're only rendering lines, not polygons, this won't help.)
>
>- Amy
>
>At 01:40 PM 9/14/2004, Louis Desjardins wrote:
>>Hello...
>>
>>Would anyone have any idea as to why my scene seems to be flickering??
>>
>>For example I use an FeatureEdges filter to outline a box but the lines 
>>dont seem stable..? or they flicker..
>>(hard to describe..)
>>
>>Thank you so much for your help!
>>(I'll try to clarify if I make no sense =S )
>>
>>LD
>>
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