VTK/Examples/Cxx/PolyData/ParametricSpline

ParametricSpline.cxx

#include <vtkSmartPointer.h>
#include <vtkCellArray.h>
#include <vtkCellData.h>
#include <vtkDoubleArray.h>
#include <vtkPoints.h>
#include <vtkParametricSpline.h>
#include <vtkPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkParametricFunctionSource.h>

int main(int, char *[])
{
  // Create three points. We will join (Origin and P0) with a red line and (Origin and P1) with a green line
  double origin[3] = {0.0, 0.0, 0.0};
  double p0[3] = {1.0, 0.0, 0.0};
  double p1[3] = {0.0, 1.0, 0.0};
  double p2[3] = {0.0, 1.0, 2.0};
  double p3[3] = {1.0, 2.0, 3.0};
    
  // Create a vtkPoints object and store the points in it
  vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();
  points->InsertNextPoint(origin);
  points->InsertNextPoint(p0);
  points->InsertNextPoint(p1);
  points->InsertNextPoint(p2);
  points->InsertNextPoint(p3);

  vtkSmartPointer<vtkParametricSpline> spline = 
    vtkSmartPointer<vtkParametricSpline>::New();
  spline->SetPoints(points);
  
  vtkSmartPointer<vtkParametricFunctionSource> functionSource = 
    vtkSmartPointer<vtkParametricFunctionSource>::New();
  functionSource->SetParametricFunction(spline);
  functionSource->Update();

  // Setup actor and mapper
  vtkSmartPointer<vtkPolyDataMapper> mapper = 
    vtkSmartPointer<vtkPolyDataMapper>::New();
  mapper->SetInputConnection(functionSource->GetOutputPort());
  
  vtkSmartPointer<vtkActor> actor = 
    vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(mapper);
  
  // Setup render window, renderer, and interactor
  vtkSmartPointer<vtkRenderer> renderer = 
    vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renderWindow = 
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = 
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow(renderWindow);
  renderer->AddActor(actor);

  renderWindow->Render();
  renderWindowInteractor->Start();
  
  return EXIT_SUCCESS;
}

Please try the new VTKExamples website.

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(ParametricSpline)

find_package(VTK REQUIRED)
include(${VTK_USE_FILE})

add_executable(ParametricSpline MACOSX_BUNDLE ParametricSpline.cxx)

if(VTK_LIBRARIES)
  target_link_libraries(ParametricSpline ${VTK_LIBRARIES})
else()
  target_link_libraries(ParametricSpline vtkHybrid vtkWidgets)
endif()

Download and Build ParametricSpline

Click here to download ParametricSpline. and its CMakeLists.txt file.

Once the tarball ParametricSpline.tar has been downloaded and extracted,

cd ParametricSpline/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:

./ParametricSpline

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.