<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hi,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I am still quite new to VTK and am trying to use the reslicing classes, based on the example in Examples\GUI\Qt\FourPaneViewer, although I am not using QT.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I have this code, <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>vtkSmartPointer<vtkImageData> image;<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>// image creation code snipped<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>auto riw = vtkSmartPointer<vtkResliceImageViewer>::New();<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>riw->SetRenderWindow(render_window_->GetRenderWindow());<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>riw->SetupInteractor(vtkSmartPointer<vtkRenderWindowInteractor>::New());<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>riw->SetResliceCursor(riw[0]->GetResliceCursor());<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>rep->GetResliceCursorActor()->GetCursorAlgorithm()->SetReslicePlaneNormal(i);<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>riw->SetInput(image); //<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>riw->SetSliceOrientation(0);<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>riw->SetResliceModeToAxisAligned();<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>This fails on the penultimate line, the call to SetSliceOrientation(), and seems to be because I have set the Input directly and the library is expecting a pipeline algorithm. Is this the case, and can you please suggest how to overcome this? Is there a pipeline algorithm to feed vtkImageData in a call to SetInputConnection() or is that the wrong route?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Here's my call stack; note the inPtr is NULL calling into vtkImageMapperConvertImageScalarsToRGBA() and beyond:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>vtkRendering.dll!vtkImageMapperShiftScale<double,double>(const double * inPtr=0x00000000, ... Line 487 C++<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>vtkRendering.dll!vtkImageMapperConvertImageScalarsToRGBA(void * inPtr=0x00000000, ... Line 611 C++<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>vtkRendering.dll!vtkImageMapperMapColors(void * arg=0x28b16b9c) Line 787 C++<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>vtkCommon.dll!vtkMultiThreader::SingleMethodExecute() Line 292 C++<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>vtkRendering.dll!vtkImageMapper3D::MakeTextureData(vtkImageProperty * property=0x28b160c8, vtkImageData * input=0x28b1adb8, ... Line 949 C++<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>vtkRendering.dll!vtkOpenGLImageSliceMapper::RenderTexturedPolygon(...) Line 276 C++<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>vtkRendering.dll!vtkOpenGLImageSliceMapper::RecursiveRenderTexturedPolygon(...) Line 150 C++<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>vtkRendering.dll!vtkOpenGLImageSliceMapper::Render(...) Line 1089 C++<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>vtkRendering.dll!vtkImageSlice::Render(...) Line 320 C++<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>vtkRendering.dll!vtkImageSlice::RenderOpaqueGeometry(vtkViewport * viewport=0x28b1baf0) Line 275 C++<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>vtkRendering.dll!vtkRenderer::UpdateGeometry() Line 630 C++<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>vtkRendering.dll!vtkOpenGLRenderer::DeviceRender() Line 247 C++<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>vtkRendering.dll!vtkRenderer::Render() Line 345 C++<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>vtkRendering.dll!vtkRendererCollection::Render() Line 51 C++<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>vtkRendering.dll!vtkRenderWindow::DoStereoRender() Line 726 C++<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>vtkRendering.dll!vtkRenderWindow::DoFDRender() Line 692 C++<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>vtkRendering.dll!vtkRenderWindow::DoAARender() Line 579 C++<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>vtkRendering.dll!vtkRenderWindow::Render() Line 392 C++<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>vtkRendering.dll!vtkImageViewer2::Render() Line 688 C++<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>vtkWidgets.dll!vtkResliceImageViewer::Render() Line 420 C++<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>vtkRendering.dll!vtkImageViewer2::SetSliceOrientation(int orientation=0) Line 301 C++<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>[myapp]<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Many thanks<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>-- Craig<o:p></o:p></span></p></div></body></html>