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
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.