good morning everybody!<br>I'm visualizing a 3D "analyze" volume, slice by slice. Ok I can do that, but I cannot interact with the slices (moving them through the volume). Can someone explain me how to do that?<br><br>Here's my obviously-not-working idea: (the code is in C++)<br>I use "vtkInteractorStyleUser.h", create a callback and updatie the position of the slices. But it doesn't work.. even if I re-render the window. Why????<br><br>This is my code:<br>//Extract a slice<br>vtkExtractVOI *extractor_XY = vtkExtractVOI::New();<br> extractor_XY->SetInputConnection(ImgReader->GetOutputPort());<br> extractor_XY->SetVOI( 0, hdr.dim[1]-1, 0, hdr.dim[2]-1, scroll_Z, scroll_Z);<br> extractor_XY->Update();<br> global_extrator_XY = extractor_XY;<br><br> //Create its texture<br> vtkTexture *texture_XY = vtkTexture::New();<br> texture_XY->SetInputConnection(extractor_XY->GetOutputPort());<br>
texture_XY->InterpolateOn();<br> texture_XY->SetLookupTable(grayScaleLookupTable);<br> texture_XY->MapColorScalarsThroughLookupTableOn();<br> global_ texture_XY = texture_XY;<br><br> //Create a plane for the texture<br> vtkPlaneSource *plane_XY = vtkPlaneSource::New();<br> plane_XY->SetXResolution(1);<br> plane_XY->SetYResolution(1);<br> plane_XY->SetOrigin(0.0, 0.0, scroll_Z);<br> plane_XY->SetPoint1(hdr.dim[1]-1, 0.0, scroll_Z);<br> plane_XY->SetPoint2(0.0, hdr.dim[1]-1, scroll_Z);<br> global_plane_XY = plane_XY;<br><br> //Shot it through the pipeline<br> vtkPolyDataMapper *mapper_XY = vtkPolyDataMapper::New();<br> mapper_XY->SetInputConnection(plane_XY->GetOutputPort());<br> mapper_XY->ImmediateModeRenderingOn();<br>global_mapper_XY = mapper_XY;<br> vtkActor *actorSlice_XY = vtkActor::New();<br>
actorSlice_XY->SetMapper(mapper_XY);<br> actorSlice_XY->SetTexture(texture_XY);<br><br>and in the callback, I change the "scroll_Z" value, update the global variables, and re-render... Why the hell is it not working?????<br><br>Thanks for your comprehension<br>Ale<br><br><br><br><br><br><p> 
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