VTK Learning Eleven - VTK Label One

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VTK Learning Eleven - VTK Label One

Description

属性标签的显示。vtkTextProperty设置文字属性。vtkPointSetToLabelHierarchy、vtkLabelPlacementMapper
和vtkActor2D渲染文字。

Code

#include<vtkRenderWindow.h>
#include<vtkSmartPointer.h>
#include<vtkPoints.h>
#include<vtkMath.h>
#include<vtkPolyData.h>
#include<vtkCellArray.h>
#include<vtkVertex.h>
#include<vtkPolyDataMapper.h>
#include<vtkActor.h>
#include<vtkRenderWindowInteractor.h>
#include<vtkRenderer.h>
#include<vtkProperty.h>
#include<vtkNamedColors.h>
#include<vtkStringArray.h>
#include<vtkPointData.h>
#include<vtkTextProperty.h>
#include<vtkPointSetToLabelHierarchy.h>
#include<vtkLabelPlacementMapper.h>
#include<vtkActor2D.h>int main(){vtkSmartPointer<vtkPoints> ps = vtkSmartPointer<vtkPoints>::New();unsigned int GridSize = 10;vtkSmartPointer<vtkStringArray>names = vtkSmartPointer<vtkStringArray>::New();names->SetName("names");int count = 0;for ( int x = 0; x < GridSize; x++){for ( int y = 0; y < GridSize; y++){ps->InsertNextPoint(x, y, vtkMath::Random(-.25, .25));names->InsertNextValue("T"+ std::to_string(count++));}}vtkSmartPointer<vtkVertex> vertex =vtkSmartPointer<vtkVertex>::New();vertex->GetPointIds()->SetNumberOfIds(ps->GetNumberOfPoints());for (int i = 0; i<ps->GetNumberOfPoints(); i++) {vertex->GetPointIds()->SetId(i, i);}vtkSmartPointer<vtkCellArray> vertices =vtkSmartPointer<vtkCellArray>::New();vertices->InsertNextCell(vertex);vtkSmartPointer<vtkPolyData> polydata =vtkSmartPointer<vtkPolyData>::New();polydata->SetPoints(ps);polydata->SetVerts(vertices);polydata->GetPointData()->AddArray(names);vtkSmartPointer<vtkTextProperty>textProp = vtkSmartPointer<vtkTextProperty>::New();textProp->SetFontSize(20);textProp->SetColor(0, 0, 0);vtkSmartPointer<vtkPointSetToLabelHierarchy>labels = vtkSmartPointer<vtkPointSetToLabelHierarchy>::New();labels->SetInputData(polydata);labels->SetLabelArrayName("names");labels->SetTargetLabelCount(polydata->GetNumberOfPoints());labels->SetTextProperty(textProp);vtkSmartPointer<vtkNamedColors> colors = vtkSmartPointer<vtkNamedColors>::New();vtkSmartPointer<vtkPolyDataMapper> pointMapper = vtkSmartPointer<vtkPolyDataMapper>::New();pointMapper->SetInputData(polydata);vtkSmartPointer<vtkActor> pointActor = vtkSmartPointer<vtkActor>::New();pointActor->GetProperty()->SetColor(1, 0, 0);pointActor->GetProperty()->SetPointSize(5);pointActor->SetMapper(pointMapper);vtkSmartPointer<vtkLabelPlacementMapper> placeMapper = vtkSmartPointer<vtkLabelPlacementMapper>::New();placeMapper->SetInputConnection(labels->GetOutputPort());vtkSmartPointer<vtkActor2D> txActor = vtkSmartPointer<vtkActor2D>::New();txActor->SetMapper(placeMapper);vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New();renderWindow->AddRenderer(renderer);vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =vtkSmartPointer<vtkRenderWindowInteractor>::New();renderWindowInteractor->SetRenderWindow(renderWindow);renderer->AddActor(pointActor);renderer->AddActor2D(txActor);renderer->SetBackground(colors->GetColor3d("Mint").GetData());renderWindow->Render();renderWindowInteractor->Initialize();renderWindowInteractor->Start();return 0;
}

CMakeLists.txt

CMAKE_MINIMUM_REQUIRED(VERSION 3.3 FATAL_ERROR)
PROJECT(Text)
FIND_PACKAGE(VTK REQUIRED)
INCLUDE(${VTK_USE_FILE})
ADD_EXECUTABLE(Text Text.cxx)
TARGET_LINK_LIBRARIES(Text  ${VTK_LIBRARIES})