WarpVector
VTKExamples/Cxx/PolyData/WarpVector
Code¶
WarpVector.cxx
#include <vtkVersion.h> #include <vtkActor.h> #include <vtkCellArray.h> #include <vtkDoubleArray.h> #include <vtkLine.h> #include <vtkPointData.h> #include <vtkPoints.h> #include <vtkPolyData.h> #include <vtkPolyDataMapper.h> #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkSmartPointer.h> #include <vtkWarpVector.h> int main(int, char *[]) { vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New(); points->InsertNextPoint(0.0, 0.0, 0.0); points->InsertNextPoint(1.0, 0.0, 0.0); points->InsertNextPoint(2.0, 0.0, 0.0); points->InsertNextPoint(3.0, 0.0, 0.0); points->InsertNextPoint(4.0, 0.0, 0.0); vtkSmartPointer<vtkCellArray> lines = vtkSmartPointer<vtkCellArray>::New(); vtkSmartPointer<vtkLine> line = vtkSmartPointer<vtkLine>::New(); line->GetPointIds()->SetId(0, 0); line->GetPointIds()->SetId(1, 1); lines->InsertNextCell(line); line->GetPointIds()->SetId(0, 1); line->GetPointIds()->SetId(1, 2); lines->InsertNextCell(line); line->GetPointIds()->SetId(0, 2); line->GetPointIds()->SetId(1, 3); lines->InsertNextCell(line); line->GetPointIds()->SetId(0, 3); line->GetPointIds()->SetId(1, 4); lines->InsertNextCell(line); vtkSmartPointer<vtkDoubleArray> warpData = vtkSmartPointer<vtkDoubleArray>::New(); warpData->SetNumberOfComponents(3); warpData->SetName("warpData"); double warp[3] = {0.0, 0.0, 0.0}; warp[1] = 0.0; warpData->InsertNextTuple(warp); warp[1] = 0.1; warpData->InsertNextTuple(warp); warp[1] = 0.3; warpData->InsertNextTuple(warp); warp[1] = 0.0; warpData->InsertNextTuple(warp); warp[1] = 0.1; warpData->InsertNextTuple(warp); vtkSmartPointer<vtkPolyData> polydata = vtkSmartPointer<vtkPolyData>::New(); polydata->SetPoints(points); polydata->SetLines(lines); polydata->GetPointData()->AddArray(warpData); polydata->GetPointData()->SetActiveVectors(warpData->GetName()); //WarpVector will use the array marked as active vector in polydata //it has to be a 3 component array //with the same number of tuples as points in polydata vtkSmartPointer<vtkWarpVector> warpVector = vtkSmartPointer<vtkWarpVector>::New(); #if VTK_MAJOR_VERSION <= 5 warpVector->SetInput(polydata); #else warpVector->SetInputData(polydata); #endif warpVector->Update(); vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New(); #if VTK_MAJOR_VERSION <= 5 mapper->SetInput(warpVector->GetPolyDataOutput()); #else mapper->SetInputData(warpVector->GetPolyDataOutput()); #endif vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); renderer->AddActor(actor); renderer->SetBackground(.3, .6, .3); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow(renderWindow); renderWindow->Render(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(WarpVector) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(WarpVector MACOSX_BUNDLE WarpVector.cxx) target_link_libraries(WarpVector ${VTK_LIBRARIES})
Download and Build WarpVector¶
Danger
The generation of tar files has not been ported to the new VTKExamples. Some tarballs may be missing or out-of-date.
Click here to download WarpVector and its CMakeLists.txt file. Once the tarball WarpVector.tar has been downloaded and extracted,
cd WarpVector/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:
./WarpVector
WINDOWS USERS PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.