
// include OS specific include file to mix in X code
#include "vtkXRenderWindow.h"
#include "vtkXRenderWindowInteractor.h"
#include "vtkSphereSource.h"
#include "vtkConeSource.h"
#include "vtkGlyph3D.h"
#include "vtkPolyDataMapper.h"
#include <Xm/PushB.h>

void quit_cb(Widget,XtPointer,XtPointer);

main (int argc, char *argv[])
{
  // X window stuff
  XtAppContext app;
  Widget toplevel, button;
  Display *display;
  
  // VTK stuff
  vtkXRenderWindow *renWin;
  vtkRenderer *ren1;
  vtkActor *sphereActor1, *spikeActor1;
  vtkSphereSource *sphere;
  vtkConeSource *cone;
  vtkGlyph3D *glyph;
  vtkPolyDataMapper *sphereMapper, *spikeMapper;
  vtkXRenderWindowInteractor *iren;
  
  renWin = vtkXRenderWindow::New();
  ren1 = vtkRenderer::New();
  renWin->AddRenderer(ren1);
  
  sphere = vtkSphereSource::New();
  sphereMapper = vtkPolyDataMapper::New();
  sphereMapper->SetInput(sphere->GetOutput());
  sphereActor1 = vtkActor::New();
  sphereActor1->SetMapper(sphereMapper);

  cone = vtkConeSource::New();

  glyph = vtkGlyph3D::New();
  glyph->SetInput(sphere->GetOutput());
  glyph->SetSource(cone->GetOutput());
  glyph->SetVectorModeToUseNormal();
  glyph->SetScaleModeToScaleByVector();
  glyph->SetScaleFactor(0.25);

  spikeMapper = vtkPolyDataMapper::New();
  spikeMapper->SetInput(glyph->GetOutput());

  spikeActor1 = vtkActor::New();
  spikeActor1->SetMapper(spikeMapper);

  ren1->AddActor(sphereActor1);
  ren1->AddActor(spikeActor1);
  ren1->SetBackground(0.4,0.1,0.2);

  // do the xwindow ui stuff
  XtSetLanguageProc(NULL,NULL,NULL);
  toplevel = XtVaAppInitialize(&app,"Sample",NULL,0,&argc,argv,NULL, NULL);
  
  // get the display connection and give it to the renderer
  display = XtDisplay(toplevel);
  renWin->SetDisplayId(display);
  
  // we typecast to an X specific interactor
  // Since we have specifically decided to make this an X program
  iren = vtkXRenderWindowInteractor::New();
  iren->SetRenderWindow(renWin);
  iren->Initialize(app);
  
  button = XtVaCreateManagedWidget("Exit",xmPushButtonWidgetClass, 
				   toplevel,
				   XmNwidth, 50, XmNheight, 50,
				   XmNx, 100, XmNy, 0,
				   NULL);
  
  XtRealizeWidget(toplevel);
  XtAddCallback(button,XmNactivateCallback,quit_cb,NULL);

  XtAppMainLoop(app);
}

// simple quit callback
void quit_cb(Widget w,XtPointer client_data, XtPointer call_data)
{
  exit(0);
}

