ComplexV
VTKExamples/Cxx/Visualization/ComplexV
Description¶
ComplexV from the VTK Textbook. The original example was written in TCL.
The example shows 167,000 3D vectors (using oriented and scaled lines) in the region of the human carotid artery. The larger vectors lie inside the arteries, the smaller vectors lie outside the arteries and are randomly oriented (measurement error) but small in magnitude. Clearly the details of the vector field are not discernible from this image.
Info
See Figure 6-13 in Chapter 6 the VTK Textbook.
Question
If you have a simple question about this example contact us at VTKExamplesProject If your question is more complex and may require extended discussion, please use the VTK Discourse Forum
Code¶
ComplexV.cxx
#include <vtkActor.h> #include <vtkCamera.h> #include <vtkHedgeHog.h> #include <vtkLookupTable.h> #include <vtkNamedColors.h> #include <vtkOutlineFilter.h> #include <vtkPolyDataMapper.h> #include <vtkProperty.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkRenderer.h> #include <vtkSmartPointer.h> #include <vtkStructuredPointsReader.h> int main (int argc , char *argv[]) { if (argc < 2) { std::cout << "Usage: " << argv[0] << " carotid.vtk" << std::endl; return EXIT_SUCCESS; } vtkSmartPointer<vtkNamedColors> colors = vtkSmartPointer<vtkNamedColors>::New(); vtkSmartPointer<vtkStructuredPointsReader> reader = vtkSmartPointer<vtkStructuredPointsReader>::New(); reader->SetFileName(argv[1]); vtkSmartPointer<vtkHedgeHog> hhog = vtkSmartPointer<vtkHedgeHog>::New(); hhog->SetInputConnection(reader->GetOutputPort()); hhog->SetScaleFactor(0.3); vtkSmartPointer<vtkLookupTable> lut = vtkSmartPointer<vtkLookupTable>::New(); // lut->SetHueRange(.667, 0.0); lut->Build(); vtkSmartPointer<vtkPolyDataMapper> hhogMapper = vtkSmartPointer<vtkPolyDataMapper>::New(); hhogMapper->SetInputConnection(hhog->GetOutputPort()); hhogMapper->SetScalarRange(50, 550); hhogMapper->SetLookupTable(lut); vtkSmartPointer<vtkActor> hhogActor = vtkSmartPointer<vtkActor>::New(); hhogActor->SetMapper(hhogMapper); vtkSmartPointer<vtkOutlineFilter> outline = vtkSmartPointer<vtkOutlineFilter>::New(); outline->SetInputConnection(reader->GetOutputPort()); vtkSmartPointer<vtkPolyDataMapper> outlineMapper = vtkSmartPointer<vtkPolyDataMapper>::New(); outlineMapper->SetInputConnection(outline->GetOutputPort()); vtkSmartPointer<vtkActor> outlineActor = vtkSmartPointer<vtkActor>::New(); outlineActor->SetMapper(outlineMapper); outlineActor->GetProperty()->SetColor(0, 0, 0); vtkSmartPointer<vtkRenderer> aRenderer = vtkSmartPointer<vtkRenderer>::New(); vtkSmartPointer<vtkRenderWindow> aRenderWindow = vtkSmartPointer<vtkRenderWindow>::New(); aRenderWindow->AddRenderer(aRenderer); vtkSmartPointer<vtkRenderWindowInteractor> anInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); anInteractor->SetRenderWindow(aRenderWindow); aRenderWindow->SetSize(640, 480); aRenderer->AddActor(outlineActor); aRenderer->AddActor(hhogActor); aRenderer->SetBackground(colors->GetColor3d("Gray").GetData()); // Generate an interesting view aRenderer->GetActiveCamera()->SetFocalPoint(0,0,0); aRenderer->GetActiveCamera()->SetPosition(1,0,0); aRenderer->GetActiveCamera()->SetViewUp(0,0,1); aRenderer->ResetCamera(); aRenderer->GetActiveCamera()->Azimuth(60); aRenderer->GetActiveCamera()->Elevation(30); aRenderer->GetActiveCamera()->Dolly(1.1); aRenderer->ResetCameraClippingRange(); aRenderWindow->Render(); // interact with data anInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR) project(ComplexV) find_package(VTK COMPONENTS vtkCommonColor vtkCommonCore vtkFiltersCore vtkFiltersModeling vtkIOLegacy vtkInteractionStyle vtkRenderingCore vtkRenderingFreeType vtkRenderingOpenGL2 QUIET) if (NOT VTK_FOUND) message("Skipping ComplexV: ${VTK_NOT_FOUND_MESSAGE}") return () endif() message (STATUS "VTK_VERSION: ${VTK_VERSION}") if (VTK_VERSION VERSION_LESS "8.90.0") # old system include(${VTK_USE_FILE}) add_executable(ComplexV MACOSX_BUNDLE ComplexV.cxx ) target_link_libraries(ComplexV PRIVATE ${VTK_LIBRARIES}) else () # include all components add_executable(ComplexV MACOSX_BUNDLE ComplexV.cxx ) target_link_libraries(ComplexV PRIVATE ${VTK_LIBRARIES}) # vtk_module_autoinit is needed vtk_module_autoinit( TARGETS ComplexV MODULES ${VTK_LIBRARIES} ) endif ()
Download and Build ComplexV¶
Click here to download ComplexV and its CMakeLists.txt file. Once the tarball ComplexV.tar has been downloaded and extracted,
cd ComplexV/build
If VTK is installed:
cmake ..
If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:
cmake -DVTK_DIR:PATH=/home/me/vtk_build ..
Build the project:
make
and run it:
./ComplexV
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.