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/*=========================================================================
Program: Visualization Toolkit
Module: TestLabelPlacementMapper.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
// .NAME Test of vtkLabelPlacementMapper
// .SECTION Description
// this program tests vtkLabelPlacementMapper which uses a sophisticated algorithm to
// prune labels/icons preventing them from overlapping.
#include "vtkActor.h"
#include "vtkActor2D.h"
#include "vtkCamera.h"
#include "vtkImageData.h"
#include "vtkInteractorStyleSwitch.h"
#include "vtkLabelHierarchy.h"
#include "vtkLabelPlacementMapper.h"
#include "vtkLabeledDataMapper.h"
#include "vtkPointData.h"
#include "vtkPointSetToLabelHierarchy.h"
#include "vtkPointSource.h"
#include "vtkPoints.h"
#include "vtkPolyData.h"
#include "vtkPolyDataMapper.h"
#include "vtkPolyDataMapper2D.h"
#include "vtkProperty.h"
#include "vtkRectilinearGrid.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkRenderer.h"
#include "vtkSmartPointer.h"
#include "vtkSphereSource.h"
#include "vtkStringArray.h"
#include "vtkStructuredGrid.h"
#include "vtkTextProperty.h"
#include "vtkTransform.h"
#include "vtkTransformPolyDataFilter.h"
#include "vtkUnstructuredGrid.h"
#include "vtkXMLPolyDataReader.h"
#include "vtkXMLPolyDataWriter.h"
#include <vtkRegressionTestImage.h>
#include <vtkTestUtilities.h>
int TestLabelPlacementMapper(int argc, char* argv[])
{
// use non-unit aspect ratio to capture more potential errors
int windowSize[2] = { 200, 600 };
vtkNew<vtkRenderWindow> renWin;
vtkNew<vtkRenderer> renderer;
vtkNew<vtkRenderWindowInteractor> iren;
vtkInteractorStyleSwitch::SafeDownCast(iren->GetInteractorStyle())
->SetCurrentStyleToTrackballCamera();
renWin->SetSize(200, 600);
renWin->AddRenderer(renderer);
renderer->SetBackground(0.0, 0.0, 0.0);
iren->SetRenderWindow(renWin);
vtkNew<vtkTextProperty> tprop;
tprop->SetFontSize(12);
tprop->SetFontFamily(vtkTextProperty::GetFontFamilyFromString("Arial"));
tprop->SetColor(0.0, 0.8, 0.2);
// Test display if anchor is defined in
// World coordinate system
{
int maxLevels = 5;
int targetLabels = 32;
double labelRatio = 0.05;
char* fname = vtkTestUtilities::ExpandDataFileName(argc, argv, "Data/uniform-001371-5x5x5.vtp");
// int iteratorType = vtkLabelHierarchy::FULL_SORT;
int iteratorType = vtkLabelHierarchy::QUEUE;
// int iteratorType = vtkLabelHierarchy::DEPTH_FIRST;
double center[3] = { 12.0, 8.0, 30.0 };
vtkNew<vtkSphereSource> sphere;
sphere->SetRadius(5.0);
// view will be centered around this centerpoint, thereby shifting normalized view coordinate
// system from world coordinate system (to test if label display works with acnhors defined in
// arbitrary coordinate systems).
sphere->SetCenter(center);
vtkNew<vtkPolyDataMapper> sphereMapper;
sphereMapper->SetInputConnection(sphere->GetOutputPort());
vtkNew<vtkActor> sphereActor;
sphereActor->SetMapper(sphereMapper);
renderer->AddActor(sphereActor);
vtkNew<vtkXMLPolyDataReader> xmlPolyDataReader;
xmlPolyDataReader->SetFileName(fname);
delete[] fname;
vtkNew<vtkTransformPolyDataFilter> transformToCenter;
transformToCenter->SetInputConnection(xmlPolyDataReader->GetOutputPort());
vtkNew<vtkTransform> transformToCenterTransform;
transformToCenterTransform->Translate(center);
transformToCenter->SetTransform(transformToCenterTransform);
vtkNew<vtkPointSetToLabelHierarchy> pointSetToLabelHierarchy;
pointSetToLabelHierarchy->SetTextProperty(tprop);
pointSetToLabelHierarchy->AddInputConnection(transformToCenter->GetOutputPort());
pointSetToLabelHierarchy->SetPriorityArrayName("Priority");
pointSetToLabelHierarchy->SetLabelArrayName("PlaceNames");
pointSetToLabelHierarchy->SetMaximumDepth(maxLevels);
pointSetToLabelHierarchy->SetTargetLabelCount(targetLabels);
vtkNew<vtkLabelPlacementMapper> labelPlacer;
labelPlacer->SetInputConnection(pointSetToLabelHierarchy->GetOutputPort());
labelPlacer->SetIteratorType(iteratorType);
labelPlacer->SetMaximumLabelFraction(labelRatio);
labelPlacer->UseDepthBufferOn();
vtkNew<vtkActor2D> textActor;
textActor->SetMapper(labelPlacer);
renderer->AddActor(textActor);
}
// Test display if anchor is defined in
// NormalizedViewport coordinate system
{
vtkNew<vtkPolyData> labeledPoints;
vtkNew<vtkPoints> points;
points->InsertNextPoint(0.05, 0.25, 0);
points->InsertNextPoint(0.75, 0.75, 0);
points->InsertNextPoint(0.50, 0.05, 0);
points->InsertNextPoint(0.50, 0.95, 0);
labeledPoints->SetPoints(points);
vtkNew<vtkStringArray> labels;
labels->SetName("labels");
labels->InsertNextValue("NV-left");
labels->InsertNextValue("NV-right");
labels->InsertNextValue("NV-bottom");
labels->InsertNextValue("NV-top");
vtkNew<vtkStringArray> labelsPriority;
labelsPriority->SetName("priority");
labelsPriority->InsertNextValue("1");
labelsPriority->InsertNextValue("1");
labelsPriority->InsertNextValue("1");
labelsPriority->InsertNextValue("1");
labeledPoints->GetPointData()->AddArray(labels);
labeledPoints->GetPointData()->AddArray(labelsPriority);
vtkNew<vtkPointSetToLabelHierarchy> pointSetToLabelHierarchy;
pointSetToLabelHierarchy->SetTextProperty(tprop);
pointSetToLabelHierarchy->AddInputData(labeledPoints);
pointSetToLabelHierarchy->SetPriorityArrayName("priority");
pointSetToLabelHierarchy->SetLabelArrayName("labels");
vtkNew<vtkLabelPlacementMapper> labelPlacer;
labelPlacer->SetInputConnection(pointSetToLabelHierarchy->GetOutputPort());
labelPlacer->PlaceAllLabelsOn();
labelPlacer->GetAnchorTransform()->SetCoordinateSystemToNormalizedViewport();
labelPlacer->UseDepthBufferOff();
vtkNew<vtkActor2D> textActor;
textActor->SetMapper(labelPlacer);
renderer->AddActor(textActor);
}
// Test display if anchor is defined in
// Display coordinate system
{
vtkNew<vtkPolyData> labeledPoints;
vtkNew<vtkPoints> points;
points->InsertNextPoint(windowSize[0] * 0.01, windowSize[1] * 0.01, 0);
points->InsertNextPoint(windowSize[0] * 0.90, windowSize[1] * 0.01, 0);
points->InsertNextPoint(windowSize[0] * 0.01, windowSize[1] * 0.97, 0);
points->InsertNextPoint(windowSize[0] * 0.90, windowSize[1] * 0.97, 0);
labeledPoints->SetPoints(points);
vtkNew<vtkStringArray> labels;
labels->SetName("labels");
labels->InsertNextValue("D-bottom-left");
labels->InsertNextValue("D-bottom-right");
labels->InsertNextValue("D-top-left");
labels->InsertNextValue("D-top-right");
vtkNew<vtkStringArray> labelsPriority;
labelsPriority->SetName("priority");
labelsPriority->InsertNextValue("1");
labelsPriority->InsertNextValue("1");
labelsPriority->InsertNextValue("1");
labelsPriority->InsertNextValue("1");
labeledPoints->GetPointData()->AddArray(labels);
labeledPoints->GetPointData()->AddArray(labelsPriority);
vtkNew<vtkPointSetToLabelHierarchy> pointSetToLabelHierarchy;
pointSetToLabelHierarchy->SetTextProperty(tprop);
pointSetToLabelHierarchy->AddInputData(labeledPoints);
pointSetToLabelHierarchy->SetPriorityArrayName("priority");
pointSetToLabelHierarchy->SetLabelArrayName("labels");
vtkNew<vtkLabelPlacementMapper> labelPlacer;
labelPlacer->SetInputConnection(pointSetToLabelHierarchy->GetOutputPort());
labelPlacer->PlaceAllLabelsOn();
labelPlacer->GetAnchorTransform()->SetCoordinateSystemToDisplay();
labelPlacer->UseDepthBufferOff();
vtkNew<vtkActor2D> textActor;
textActor->SetMapper(labelPlacer);
renderer->AddActor(textActor);
}
///
renWin->Render();
// renderer->GetActiveCamera()->ParallelProjectionOn();
renderer->ResetCamera();
renderer->ResetCamera();
renderer->ResetCamera();
int retVal = vtkRegressionTestImage(renWin);
if (retVal == vtkRegressionTester::DO_INTERACTOR)
{
iren->Start();
}
return !retVal;
}
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