void VTKItem::CreateEditingPoints(vtkSmartPointer<vtkAppendPolyData> pEditingPointData)
{
	// Create the selection glyph if it doesn't already exist
	if (!m_pSelectionGlyph)
	{
		// Store the editing data so that we can refer to it later
		m_pEditingPointData = pEditingPointData;

		// Create the glyph representation
		vtkSmartPointer<vtkSphereSource> pSphere = vtkSmartPointer<vtkSphereSource>::New();
		pSphere->SetThetaResolution(16);
		pSphere->SetRadius(0.05);
		pSphere->SetPhiResolution(16);

		// Create the glyph object
		vtkSmartPointer<vtkGlyph3D> pGlyph = vtkSmartPointer<vtkGlyph3D>::New();
		pGlyph->SetSourceConnection(pSphere->GetOutputPort());
		pGlyph->SetInputData(pEditingPointData->GetOutput());
		pGlyph->ScalingOff();
		pGlyph->SetScaleModeToDataScalingOff();
		pGlyph->GeneratePointIdsOn();
		pGlyph->Update();

		// Visualize the actor
		vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New();
		mapper->SetInputConnection(pGlyph->GetOutputPort());
		mapper->SetScalarVisibility(0);

		// Create the actor
		m_pSelectionGlyph = vtkSmartPointer<vtkActor>::New();
		m_pSelectionGlyph->SetMapper(mapper);

		// Add the actor to the scene
		m_pRenderer->AddActor(m_pSelectionGlyph);
	}
}