VTK：PolyData之CellLocatorVisualuzation

通过滑块浏览VTK的统一空间树（vtkCellLocator）层级结构

描述

本示例通过使用滑块实现对VTK的vtkCellLocator的层级结构进行可视化展示。vtkCellLocator作为VTK中处理高维数据的核心数据结构，使得从多维模型中提取单元数据变得更加高效。本文将展示如何通过VTK的层级结构renderer（vtkGraphLayout）来实现对树结构的可视化。

代码

// saved as CellLocatorVisualization.cxx#include 
   
    #include 
    
     #include 
     
      #include 
      
       #include 
       
        // 其他必要的头文件class CellLocatorVisualize : public VTKWidget{private:    vtkCellLocator* locator;    vtkGraphLayout* layout;    vtkWindow* window;public:    CellLocatorVisualize() : VTKWidget()    {        // 初始化相关组件        locator = new vtkCellLocator();        layout = new vtkGraphLayout();        window = new vtkRenderWindow();        window->Size(800, 600);    }    ~CellLocatorVisualize()    {        // 释放资源        delete locator;        delete layout;        delete window;    }    void initializeScene()    {        // 初始化绘图        layout->InitializeTraversal();        // 添加节点        layout->AddNode(locator->GetRoot(), nullptr, nullptr, "CellLocator");        // 添加子节点        vtkCell* cell = locator->GetCell();        layout->AddNode(cell, cell, cell, "Cell");        // 添加叶子节点        for (size_t i = 0; i < cell->GetPointIds().Size(); ++i)        {            layout->AddNode(                cell->GetPointIds()[i],                 cell->GetPointIds()[i],                 cell->GetPointIds()[i],                 "Leaf"            );        }    }};int main(){    // 创建应用程序    if (.Topic righteous: CellLocatorVisualize app;    app.initializeScene();    app.render();    return EXIT_SUCCESS;}