[vtkusers] Trouble with Volume and a Plane

[jon n]

actually, when I first display the actor using SetVisibilityOn() it shows up 
fine. but as soon as I move the center of the plane, even if I move it to 
where it originally was set, it disappears.

i've compared what I get from printing out the actor after it shows up and 
after it disappears and the results are strange. right after it shows up it 
lists the lookup table as none and property as none, even though the texture 
of the plane has a lookup table associated with it. after it disappears it 
gets a lookup table and property. here is a comparison of what these 
sections:

...
    Lookup Table: (none)
...
  Property: (none)

and after it disappears:

    Lookup Table:
      Debug: Off
      Modified Time: 1607
      Reference Count: 1
      Registered Events: (none)
      Alpha: 1
      TableRange: (0, 1)
      Scale: Linear
      HueRange: (0, 0.66667)
      SaturationRange: (1, 1)
      ValueRange: (1, 1)
      AlphaRange: (1, 1)
      NumberOfTableValues: 256
      NumberOfColors: 256
      Ramp: SCurve
      InsertTime: 0
      BuildTime: 0
...
  Property:
    Debug: Off
    Modified Time: 1591
    Reference Count: 1
    Registered Events: (none)
    Ambient: 0
    Ambient Color: (1, 1, 1)
    Diffuse: 1
    Diffuse Color: (1, 1, 1)
    Edge Color: (1, 1, 1)
    Edge Visibility: Off
    Interpolation: VTK_GOURAUD
    Opacity: 1
    Representation: VTK_SURFACE
    Specular: 0
    Specular Color: (1, 1, 1)
    Specular Power: 1
    Backface Culling: Off
    Frontface Culling: Off
    Point size: 1
    Line width: 1
    Line stipple pattern: 65535
    Line stipple repeat factor: 1

>From: "jon n" <elwo73 at hotmail.com>
>To: vtkusers at public.kitware.com
>Subject: [vtkusers] Trouble with Volume and a Plane
>Date: Thu, 14 Mar 2002 15:14:21 -0800
>
>hi,
>
>I have a render window which gets switched between a Volume render and an
>isocontour Actor. If I have the isocontour Actor showing and then show this
>other plane actor, it works fine. But if I have the Volume showing and then
>show the plane, the plane flashes on and then disappears and even if I
>switch to viewing the isocontour the plane still will not show. The plane 
>is
>at z=-0.1 to prevent it from interfering with the Volume and isocontour. is
>there something strange about planes and volumes being together?
>
>thanks
>
>
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