Hello,
I don’t know the answer since the celltreelocator does not have levels but buckets.
Also I am rendering offscreen but it is working.
Thank you,
NAMESPACE:
namespace {class vtkSliderCallback : public vtkCommand
{
public:
static vtkSliderCallback* New()
{ return new vtkSliderCallback;}
vtkSliderCallback() : Cell_Locator(0), Level(12), PolyData(0), Renderer(0) {}
virtual void Execute(vtkObject* caller, unsigned long, void*)
{ vtkSliderWidget* sliderWidget = reinterpret_cast<vtkSliderWidget*>(caller);
this->Level = vtkMath::Round(static_cast<vtkSliderRepresentation*>(sliderWidget->GetRepresentation())->GetValue());
this->Cell_Locator->GenerateRepresentation(this->Level, this->PolyData);
this->Renderer->Render();}
vtkCellTreeLocator* Cell_Locator;
int Level;
vtkPolyData* PolyData;
vtkRenderer* Renderer;};}
MAIN CODE:
vtkNew<vtkCellTreeLocator> cell_locator_2;
cell_locator_2->SetDataSet(polydata);
cell_locator_2->SetNumberOfBuckets(max_level);
cell_locator_2->SetNumberOfCellsPerNode(cells_perbuckets);
cell_locator_2->CacheCellBoundsOn();
cell_locator_2->BuildLocator();
cell_locator_2->GenerateRepresentation(0, polydata);
datastructuretype = "Tree Cell Locator";
// Calculate the elapsed time
buildtime = datastructuretype +"Build Time: ";
datastructuretype = "Tree Cell Locator";
// Calculate the elapsed time
buildtime = datastructuretype +"Build Time: ";
cell_locator_2->GenerateRepresentation(0, polydata);
std::cout << "Cell Locator: Num Levels: " << cell_locator_2->GetLevel() << " Per Leave: " << cell_locator_2->GetNumberOfBuckets()<<std::endl;
vtkNew<vtkNamedColors> colors3;
vtkNew<vtkPolyDataMapper> pointsMapper;
pointsMapper->SetInputData(polydata);
pointsMapper->ScalarVisibilityOff();
vtkNew<vtkActor> pointsActor;
pointsActor->SetMapper(pointsMapper);
pointsActor->GetProperty()->SetInterpolationToFlat();
pointsActor->GetProperty()->SetColor(colors3->GetColor4d("Lime").GetData());
pointsActor->GetProperty()->SetOpacity(.2);
pointsActor->RotateWXYZ(-90.0, 1.0, 0.0, 0.0);
pointsActor->Modified();
// Initialize the representation.
vtkNew<vtkPolyDataMapper> locatorTreeMapper;
locatorTreeMapper->SetInputData(polydata);
vtkNew<vtkActor> locatorTreeActor;
locatorTreeActor->SetMapper(locatorTreeMapper);
locatorTreeActor->GetProperty()->SetOpacity(.5);
locatorTreeActor->GetProperty()->EdgeVisibilityOn();
locatorTreeActor->GetProperty()->SetColor(colors3->GetColor4d("Green").GetData());
locatorTreeActor->GetProperty()->SetInterpolationToFlat();
locatorTreeActor->GetProperty()->SetRepresentationToWireframe();
locatorTreeActor->RotateWXYZ(-90.0, 1.0, 0.0, 0.0);
locatorTreeActor->Modified();
// A renderer and render window.
vtkNew<vtkRenderer> renderer;
vtkNew<vtkEGLRenderWindow> renderWindow;
renderWindow->AddRenderer(renderer);
/* vtkNew<vtkNamedColors> colors2;
vtkNew<vtkTextActor> txt;
txt->SetInput(buildtime.c_str());
vtkTextProperty* txtprop = txt->GetTextProperty();
txtprop->SetFontFamilyToArial();
txtprop->SetFontSize(15);
txtprop->SetColor(colors2->GetColor4d("Blue").GetData());
txt->SetDisplayPosition(20, 12);*/
// An interactor.
vtkNew<vtkInteractorStyleTrackballCamera> style;
vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
renderWindowInteractor->SetRenderWindow(renderWindow);
renderWindowInteractor->SetInteractorStyle(style);
// Add the actors to the scene.
renderer->AddActor(pointsActor);
renderer->AddActor(locatorTreeActor);
renderer->SetBackground(colors3->GetColor3d("Teal").GetData());
// renderer->AddActor(txt);
renderer->UseHiddenLineRemovalOn();
renderer->Modified();
renderWindow->OffScreenRenderingOn();
renderWindow->SetShowWindow(false);
//renderWindow->WindowInitialize();
renderWindow->SetSize(640, 480);
renderWindow->SetWindowName("CellLocatorVisualization");
renderWindow->Render();
vtkNew<vtkSliderRepresentation2D> sliderRep;
sliderRep->SetMinimumValue(0);
sliderRep->SetMaximumValue(cell_locator_2->GetNumberOfBuckets());
sliderRep->SetValue(cell_locator_2->GetNumberOfBuckets());;
//sliderRep->SetTitleText("MaxPointsPerRegion");
sliderRep->GetPoint1Coordinate()->SetCoordinateSystemToNormalizedDisplay();
sliderRep->GetPoint1Coordinate()->SetValue(.2, .1);
sliderRep->GetPoint2Coordinate()->SetCoordinateSystemToNormalizedDisplay();
sliderRep->GetPoint2Coordinate()->SetValue(.8, .1);
sliderRep->SetSliderLength(0.075);
sliderRep->SetSliderWidth(0.05);
sliderRep->SetEndCapLength(0.05);
sliderRep->GetTitleProperty()->SetColor(colors3->GetColor3d("Beige").GetData());
sliderRep->GetCapProperty()->SetColor(colors3->GetColor3d("MistyRose").GetData());
sliderRep->GetSliderProperty()->SetColor(colors3->GetColor3d("LightBlue").GetData());
sliderRep->GetSelectedProperty()->SetColor(colors3->GetColor3d("Violet").GetData());
vtkNew<vtkSliderWidget> sliderWidget;
sliderWidget->SetInteractor(renderWindowInteractor);
sliderWidget->SetRepresentation(sliderRep);
sliderWidget->SetAnimationModeToAnimate();
sliderWidget->EnabledOn();
vtkNew<vtkSliderCallback> callback;
callback->Cell_Locator = cell_locator_2; break;
callback->PolyData = polydata;
callback->Renderer = renderer;
callback->Execute(sliderWidget,0 , 0);
sliderWidget->AddObserver(vtkCommand::InteractionEvent, callback);
renderWindowInteractor->Initialize();
renderWindow->Render();
renderWindowInteractor->Start();
vtkNew<vtkWindowToImageFilter> windowToImageFilter;
windowToImageFilter->SetInput(renderWindow);
windowToImageFilter->Update();
vtkNew<vtkPNGWriter> writer;
writer->SetFileName(datastructuretype.c_str());
writer->SetInputConnection(windowToImageFilter->GetOutputPort());
writer->Write();
