#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkPoints.h"
#include "vtkCellArray.h"
#include "vtkNormals.h"
#include "vtkScalars.h"
#include "vtkPolyData.h"
#include "vtkGaussianSplatter.h"
#include "vtkContourFilter.h"
#include "vtkPolyDataMapper.h"
#include "vtkActor.h"
#include "vtkOutlineFilter.h"
#include "vtkConeSource.h"

main ()
{
  float x[3], n[3];

  vtkRenderer *aren = vtkRenderer::New();
  vtkRenderWindow *renWin = vtkRenderWindow::New();
    renWin->AddRenderer(aren);
  vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
    iren->SetRenderWindow(renWin);

  // Create single splat point
  vtkPoints *pts = vtkPoints::New();
  vtkCellArray *verts = vtkCellArray::New();
  vtkNormals *norms = vtkNormals::New();
  vtkScalars *scalars = vtkScalars::New();

  x[0] = x[1] = x[2] = 0.0;
  pts->InsertNextPoint(x);
  n[0] = 0.707; n[1] = 0.707; n[2] = 0.0;
  norms->InsertNextNormal(n);
  scalars->InsertNextScalar(2.5);
  verts->InsertNextCell(1);
  verts->InsertCellPoint(0);
  vtkPolyData *pData = vtkPolyData::New();
    pData->SetPoints(pts);
    pData->SetVerts(verts);
    pData->GetPointData()->SetNormals(norms);
    pData->GetPointData()->SetScalars(scalars);

  // Splat point and generate isosurface
  vtkGaussianSplatter *splat = vtkGaussianSplatter::New();
      splat->SetInput(pData);
      splat->SetModelBounds(-1.0,1.0, -1.0,1.0, -1.0,1.0);
      splat->SetSampleDimensions(75,75,75);
      splat->SetRadius(0.20);
      splat->SetEccentricity(5.0);
  vtkContourFilter *contour = vtkContourFilter::New();
      contour->SetInput(splat->GetOutput());
      contour->SetValue(0, 0.9);
  vtkPolyDataMapper *splatMapper = vtkPolyDataMapper::New();
      splatMapper->SetInput(contour->GetOutput());
  vtkActor *splatActor = vtkActor::New();
      splatActor->SetMapper(splatMapper);

  // Create outline
  vtkOutlineFilter *outline = vtkOutlineFilter::New();
      outline->SetInput(splat->GetOutput());
  vtkPolyDataMapper *outlineMapper = vtkPolyDataMapper::New();
      outlineMapper->SetInput(outline->GetOutput());
  vtkActor *outlineActor = vtkActor::New();
      outlineActor->SetMapper(outlineMapper);
      outlineActor->GetProperty()->SetColor(0,0,0);

  // Create cone to indicate direction
  vtkConeSource *cone = vtkConeSource::New();
      cone->SetResolution(24);
  vtkPolyDataMapper *coneMapper = vtkPolyDataMapper::New();
      coneMapper->SetInput(cone->GetOutput());
  vtkActor *coneActor = vtkActor::New();
      coneActor->SetMapper(coneMapper);
      coneActor->SetScale(0.75,0.75,0.75);
      coneActor->RotateZ(45.0);
      coneActor->AddPosition(0.50,0.50,0.0);
      coneActor->GetProperty()->SetColor(1.0000, 0.4118, 0.7059);
//
// Rendering stuff
//
  aren->SetBackground(1,1,1);
      aren->AddActor(splatActor);
      aren->AddActor(outlineActor);
      aren->AddActor(coneActor);

  renWin->SetSize(750,750);
  renWin->Render();

  // interact with data
  iren->Start();

  // Clean up
  aren->Delete();
  renWin->Delete();
  iren->Delete();
  pts->Delete();
  verts->Delete();
  norms->Delete();
  scalars->Delete();
  pData->Delete();
  splat->Delete();
  contour->Delete();
  splatMapper->Delete();
  splatActor->Delete();
  outline->Delete();
  outlineMapper->Delete();
  outlineActor->Delete();
  cone->Delete();
  coneMapper->Delete();
  coneActor->Delete();
}
