[vtkusers] Combining resliced images and polygons

[Scott Johnson]

I had tried it earlier and it made no difference.  I tried it again,
just to be sure.  Still no difference.

 

Thanks

 

                                -- Scott

 

From: Jothybasu K Selvaraj [mailto:jothybasu at gmail.com] 
Sent: Friday, March 26, 2010 11:32 AM
To: Scott Johnson
Cc: vtkusers at vtk.org
Subject: Re: [vtkusers] Combining resliced images and polygons

 

Did you add Cutter.Update()

Jothy

On Fri, Mar 26, 2010 at 4:30 PM, Scott Johnson
<Scott.Johnson at neuwave.com> wrote:

Yes.

 

clippedROI = vtk.vtkCutter()

clippedROI.SetCutFunction(plane)

clippedROI.GenerateCutScalarsOff()

clippedROI.SetInputConnection(targetSphere.GetOutputPort())

 

                                -- Scott

 

From: Jothybasu K Selvaraj [mailto:jothybasu at gmail.com] 
Sent: Friday, March 26, 2010 11:29 AM


To: Scott Johnson
Cc: vtkusers at vtk.org
Subject: Re: [vtkusers] Combining resliced images and polygons

 

Did you set the generateCutScalarsOff() in cutter?

That is the most important point.

Jothy

On Fri, Mar 26, 2010 at 4:27 PM, Scott Johnson
<Scott.Johnson at neuwave.com> wrote:

Thanks again Jothy, but it didn't make any difference.

 

My actor definition code now looks like:

 

clipActor = vtk.vtkActor()

clipActor.SetMapper(clipMapper)

clipActor.GetProperty().SetLineWidth(10)

clipActor.GetProperty().SetOpacity(1.0)

clipActor.GetProperty().SetColor(1.0, 0.0, 0.0)

clipActor.GetProperty().SetDiffuseColor(1.0, 0.0, 0.0)

clipActor.GetProperty().SetEdgeColor(1.0, 0.0, 0.0)

clipActor.GetProperty().SetDiffuse(0.8)

clipActor.GetProperty().SetSpecular(0.3)

clipActor.GetProperty().SetSpecularPower(20)

clipActor.GetProperty().SetRepresentationToSurface()

 

Could it be something in the image viewer?  That code is:

imageViewer = vtk.vtkImageViewer2()

imageViewer.SetupInteractor(interactor)

imageViewer.SetInputConnection(reslice.GetOutputPort())

imageViewer.SetSlice((zMax - zMin) / 2)

imageViewer.GetRenderer().AddActor(clipActor)

imageViewer.GetRenderer().AddActor(annotation)

imageViewer.SetSize(winWidth, winHeight)

imageViewer.SetColorWindow(defaultWindowValue)

imageViewer.SetColorLevel(defaultWindowValue / 2)

 

I'll attach a picture of what I'm seeing.  The confusing part to me is
that the 'annotation' does show up colored as expected.

 

Thanks

 

                                -- Scott

 

From: Jothybasu K Selvaraj [mailto:jothybasu at gmail.com] 
Sent: Friday, March 26, 2010 10:22 AM
To: Scott Johnson
Cc: vtkusers at vtk.org


Subject: Re: [vtkusers] Combining resliced images and polygons

 

Set cutter.GenerateCutScalarsOff()



and 

Actor.GetProperty().SetDiffuseColor(color)
Actor.GetProperty().SetDiffuse(0.8) Actor.GetProperty().SetSpecular(0.3)
       Actor.GetProperty().SetSpecularPower(20)
      Actor.GetProperty().SetRepresentationToSurface()

Jothy

On Fri, Mar 26, 2010 at 10:32 AM, Jothybasu K Selvaraj
<jothybasu at gmail.com> wrote:

Instead of using Clipper use vtkCutter, that will give you a contour not
half sphere.

Jothy

On Thu, Mar 25, 2010 at 10:14 PM, Scott Johnson
<Scott.Johnson at neuwave.com> wrote:

Hi Folks,

 

I'm looking for a pointer.

 

I'm trying to display a resliced image, either axial, coronal, or
sagital and then display a contour representing the same plane cutting
through a polygonal shape.  In my current example I have created a
sphere which intersects some of the image slices.  As I scroll through
the slices I expect to see circles where the slice intersects the
sphere.

 

Right now I have created a SphereSource -> ClipPolyData ->
PolyDataMapper -> Actor.  The ClipPolyData has a plane as the clip
function.

 

For the images I have ImageReslice -> ImageMapToWindowLevelColors ->
ImageActor

 

Both of these actors are connected to a Renderer and added to a
RenderWindow.

 

What I get is a slice and half of a sphere floating over it.  I can't
get the circle to be reflected on the image.  I've also tried to use an
ImageViewer2 for the display to no avail.

 

My original plan was to sync the plane definitions in the ImageReslice
and the clipping plane, but I can't get past this point.

 

This seems much more difficult than it needs to be.  Is there a simpler
way?

 

Thanks

 

                                -- Scott

 


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