[vtkusers] Problem with rendering Volume and Textured Plane

[Praveen Bhaniramka]

Hi Niels,

What hardware are you running this on? I am assuming that VTK would
internally be using OpenGL for the rendering. If you are running your app
on IRIX, you can probably use ogldebug to find out what all OpenGL state
is being modified (without you knowing about it!). Not sure if it is
available on any other platforms.

hth,
Praveen

On Thu, 18 Jul 2002, Niels Bakker wrote:

> Hi Praveen,
> 
> To my knowledge I am not using openGL. For the volume I am using a
> vtkVolumeRayCastMapper added to a vtkVolume. For the plane I'm using a
> vtkPolyDataMapper and a vtkTexture added to a vtkActor. Both are attached to
> the same vtkRenderer.
> 
> Its still a mistery to me.
> 
> Niels
> 
> 
> (-:-) -----Original Message-----
> (-:-) From: Praveen Bhaniramka [mailto:praveenb at gauri.engr.sgi.com]
> (-:-) Sent: Tuesday, July 16, 2002 6:24 PM
> (-:-) To: Niels Bakker
> (-:-) Cc: vtkusers at public.kitware.com
> (-:-) Subject: Re: [vtkusers] Problem with rendering Volume and
> (-:-) Textured Plane
> (-:-)
> (-:-)
> (-:-) Hi Niels,
> (-:-)
> (-:-) Not sure how you are rendering the volume (using the ray-caster or the
> (-:-) texture mapper), but this seems to be an OpenGL state issue. Make sure
> (-:-) that you have restored your OpenGL state (the state that you
> (-:-) modified like
> (-:-) blending functions, etc) after you render the volume data.
> (-:-)
> (-:-) Cheers,
> (-:-) Praveen
> (-:-)
> (-:-) On Tue, 16 Jul 2002, Niels Bakker wrote:
> (-:-)
> (-:-) > Hi,
> (-:-) >
> (-:-) > I'm trying to render a volume and a textured plane. The
> (-:-) texture on the plane
> (-:-) > disappears after the first render and it is replaced by an
> (-:-) image of the
> (-:-) > rendered scene. If I don't add the volume to the renderer
> (-:-) the textured plane
> (-:-) > works fine.
> (-:-) >
> (-:-) > It seems to be the same problem as was already described
> (-:-) earlier, but no
> (-:-) > solution was given:
> (-:-) >
> (-:-) > http://public.kitware.com/pipermail/vtkusers/2002-March/010279.html
> (-:-) >
> (-:-) > Can anyone help?
> (-:-) >
> (-:-) > Niels
> (-:-) >
> (-:-) >
> (-:-) >
> (-:-) > N.H.Bakker PhD
> (-:-) > Academic Medical Center
> (-:-) > Dept. of Medical Physics
> (-:-) > Meibergdreef 9
> (-:-) > 1105 AZ Amsterdam
> (-:-) >
> (-:-) > Phone: (+31) 20-566 8978
> (-:-) > Mail : n.h.bakker at amc.uva.nl
> (-:-) >
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> 
> --
> -----------------------------------------------------------------
> Praveen Bhaniramka               Member of Technical Staff (MTS)
> praveenb at sgi.com                 Advanced Graphics Division
> (650)933-1785                    Silicon Graphics, Inc.
> -----------------------------------------------------------------
> 
> 
> 

-- 
-----------------------------------------------------------------
Praveen Bhaniramka               Member of Technical Staff (MTS)
praveenb at sgi.com                 Advanced Graphics Division
(650)933-1785                    Silicon Graphics, Inc.
-----------------------------------------------------------------