VTK 数据类型：规则网格

VTK 数据类型：规则网格
- 分类
- 三种规则网格需要的设置
- 实例

VTK 数据类型：规则网格

三种规则网格需要的设置

因为 3 种规则网格在拓扑上都是规则的，所以都调用 SetExtent()。

在这里插入图片描述

实例

本程序设置了3个视口（renderer），还设置了每个视口的背景色。左视口展示vtkImageData，中视口展示vtkRectilinearGrid，右视口展示vtkStructuredGrid。

#include "VTKRegularGrid.h"#include <vtkNamedColors.h>
#include <vtkImageData.h>
#include <vtkRectilinearGrid.h>
#include <vtkDoubleArray.h>
#include <vtkStructuredGrid.h>
#include <vtkDataSetMapper.h>
#include <vtkProperty.h>
#include <vtkActor.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>VTKRegularGrid::VTKRegularGrid(QWidget* parent): QMainWindow(parent)
{ui.setupUi(this);_pVTKWidget = new QVTKOpenGLNativeWidget();this->setCentralWidget(_pVTKWidget);vtkNew<vtkNamedColors> colors;// vtkImageDataint gridSize = 5;vtkNew<vtkImageData> imageData;imageData->SetExtent(0, gridSize - 1, 0, gridSize - 1, 0, gridSize - 1);double dbSpace[] = { 1, 2, 3 };imageData->SetSpacing(dbSpace);vtkNew<vtkDataSetMapper> imageDataMapper;imageDataMapper->SetInputData(imageData);vtkNew<vtkActor> imageDataActor;imageDataActor->GetProperty()->SetRepresentationToWireframe(); // 设置为线框模式imageDataActor->SetMapper(imageDataMapper);// vtkRectilinearGridvtkNew<vtkRectilinearGrid> rectilinearGrid;rectilinearGrid->SetExtent(0, gridSize - 1, 0, gridSize - 1, 0, gridSize - 1);vtkNew<vtkDoubleArray> xCoords;xCoords->SetNumberOfComponents(1);vtkNew<vtkDoubleArray> yCoords;yCoords->SetNumberOfComponents(1);vtkNew<vtkDoubleArray> zCoords;zCoords->SetNumberOfComponents(1);for (int i = 0; i < gridSize; i++){if (i == 0){xCoords->InsertNextValue(0);yCoords->InsertNextValue(0);zCoords->InsertNextValue(0);}else{double oldX = xCoords->GetValue(i - 1);xCoords->InsertNextValue(oldX + i * i);double oldY = yCoords->GetValue(i - 1);yCoords->InsertNextValue(oldY + i * i);double oldZ = zCoords->GetValue(i - 1);zCoords->InsertNextValue(oldZ + i * i);}}rectilinearGrid->SetXCoordinates(xCoords);rectilinearGrid->SetYCoordinates(yCoords);rectilinearGrid->SetZCoordinates(zCoords);vtkNew<vtkDataSetMapper> rectilinearGridMapper;rectilinearGridMapper->SetInputData(rectilinearGrid);vtkNew<vtkActor> rectilinearGridActor;rectilinearGridActor->GetProperty()->SetRepresentationToWireframe(); // 设置为线框模式rectilinearGridActor->SetMapper(rectilinearGridMapper);// vtkStructuredGridvtkNew<vtkStructuredGrid> structuredGrid;structuredGrid->SetExtent(0, gridSize - 1, 0, gridSize - 1, 0, gridSize - 1);vtkNew<vtkPoints> points;for (int i = 0; i < gridSize; i++){for (int j = 0; j < gridSize; j++){for (int k = 0; k < gridSize; k++){double p[3] = { i, j + 0.5 * i, k };points->InsertNextPoint(p[0], p[1], p[2]);}}}structuredGrid->SetPoints(points);vtkNew<vtkDataSetMapper> structuredGridMapper;structuredGridMapper->SetInputData(structuredGrid);vtkNew<vtkActor> structuredGridActor;structuredGridActor->GetProperty()->SetRepresentationToWireframe(); // 设置为线框模式structuredGridActor->SetMapper(structuredGridMapper);// 设置 3 个视口vtkNew<vtkRenderer> leftRenderer;double leftViewport[4] = { 0, 0, 0.33, 1 };leftRenderer->SetViewport(leftViewport);leftRenderer->SetBackground(colors->GetColor3d("BurlyWood").GetData());leftRenderer->AddActor(imageDataActor);this->_pVTKWidget->renderWindow()->AddRenderer(leftRenderer);vtkNew<vtkRenderer> midRenderer;double midViewport[4] = { 0.33, 0, 0.67, 1 };midRenderer->SetViewport(midViewport);midRenderer->SetBackground(colors->GetColor3d("CadetBlue").GetData());midRenderer->AddActor(rectilinearGridActor);this->_pVTKWidget->renderWindow()->AddRenderer(midRenderer);vtkNew<vtkRenderer> rightRenderer;double rightViewport[4] = { 0.67, 0, 1, 1 };rightRenderer->SetViewport(rightViewport);rightRenderer->SetBackground(colors->GetColor3d("Plum").GetData());rightRenderer->AddActor(structuredGridActor);this->_pVTKWidget->renderWindow()->AddRenderer(rightRenderer);this->_pVTKWidget->renderWindow()->Render();
}VTKRegularGrid::~VTKRegularGrid()
{}