1、VTK介绍

输入数据（Source），对数据进行滤波(Filter)操作，然后对数据进行映射（vtkMapper），将其封装成一个对象(vtkActor)，再将这个对象添加到渲染场景（vtkRenderer）中，再利用渲染窗口（vtkRenderWindow）中进行渲染展示。

现在整个剧院就相当于一个vtk中渲染窗口vtkRenderWindow，舞台就是渲染场景vtkRenderer，演员就是一个个对象vtkActor，他们不同的容貌、服装等这些属性统称为vtkProperty，我们观众和演员的互动就是vtkRenderWindowInteractor，我们送花、拥抱、握手等这些就是交互的风格vtkInteractorStyle，舞台上的灯光就是vtkLight，每个观众的眼睛就是vtkCamera，由于我们每个观众看到的东西都是唯一的所以vtkCamera只有一个，但是灯光vtkLight却可以是多个的。

2、实例

QtVTKTest.h

#pragma once
#include <QtWidgets/QWidget>
#include "ui_QtVTKTest.h"
#include "vtkAutoInit.h"
VTK_MODULE_INIT(vtkRenderingOpenGL2);
VTK_MODULE_INIT(vtkInteractionStyle);
#include <vtkOutputWindow.h>
#include <vtkSmartPointer.h>
#include <vtkImageViewer2.h>
#include <vtkJPEGReader.h>
#include <vtkPNGReader.h>
#include <vtkTIFFReader.h>
#include <vtkBMPReader.h>
#include <vtkDICOMImageReader.h>
#include <vtkNamedColors.h>
#include <vtkFloatArray.h>
#include <array>
#include <vtkPolyDataMapper.h>
#include <vtkCellArray.h>
#include <vtkCellArray.h>
#include <vtkCamera.h>
#include <vtkPoints.h>
#include <vtkPolyData.h>
#include <vtkRenderer.h>
#include <vtkPolyDataMapper.h>
#include <vtkNew.h>
#include<vtkConeSource.h>
#include<vtkPolyDataMapper.h>
#include<vtkRenderWindow.h>
#include<vtkRenderWindowInteractor.h>
#include<vtkInteractorStyleTrackballCamera.h>
#include <vtkLight.h>
#include <vtkCubeSource.h>
#include <vtkTriangleFilter.h>
#include <vtkMassProperties.h>
#include <vtkActor.h>
#include <vtkProperty.h>
#include <vtkSphereSource.h>
#include <vtkTransform.h>
#include <vtkAxesActor.h>
#include <vtkCylinderSource.h>
#include "vtkInteractorStyleTrackballCamera.h"
#include <vtkTexture.h>
#include <vtkBMPReader.h>
#include <vtkImageViewer2.h>
#include <vtkEventQtSlotConnect.h>
#include <qdebug.h>
#include <vtkAxesActor.h>class QtVTKTest : public QWidget
{Q_OBJECTpublic:QtVTKTest(QWidget *parent = Q_NULLPTR);void renderImg();void VTKWidget5();void VTKWidget6();void VTKWidget7();public slots://响应鼠标移动的消息，实时输出鼠标的当前位置  void updateCoords(vtkObject* obj);private:Ui::QtVTKTestClass ui;
};

QtVTKTest.cpp

#include "QtVTKTest.h"QtVTKTest::QtVTKTest(QWidget *parent): QWidget(parent)
{vtkOutputWindow::SetGlobalWarningDisplay(0);//不弹出vtkOutputWindow窗口ui.setupUi(this);renderImg();VTKWidget5();VTKWidget6();VTKWidget7();
}void QtVTKTest::renderImg()
{// bmp图片vtkSmartPointer<vtkBMPReader> render = vtkSmartPointer<vtkBMPReader>::New();render->SetFileName("C:\\Users\\Administrator\\Desktop\\N\\1.bmp");render->Update();vtkSmartPointer<vtkImageViewer2> viewer = vtkSmartPointer<vtkImageViewer2>::New();viewer->SetInputData(render->GetOutput());viewer->SetRenderWindow(ui.qvtkWidget->GetRenderWindow());viewer->Render();// jpg图片vtkSmartPointer<vtkJPEGReader> render1 = vtkSmartPointer<vtkJPEGReader>::New();render1->SetFileName("C:\\Users\\Administrator\\Desktop\\新建文件夹\\111.jpg");render1->Update();vtkSmartPointer<vtkImageViewer2> viewer1 = vtkSmartPointer<vtkImageViewer2>::New();viewer1->SetInputData(render1->GetOutput());viewer1->SetRenderWindow(ui.qvtkWidget_2->GetRenderWindow());viewer1->Render();// PNG图片vtkSmartPointer<vtkPNGReader> render2 = vtkSmartPointer<vtkPNGReader>::New();render2->SetFileName("C:\\Users\\Administrator\\Desktop\\新建文件夹\\111.png");render2->Update();vtkSmartPointer<vtkImageViewer2> viewer2 = vtkSmartPointer<vtkImageViewer2>::New();viewer2->SetInputData(render2->GetOutput());//viewer2->SetRenderWindow(ui.qvtkWidget_3->GetRenderWindow());//viewer2->Render();// ConeSource// 创建圆锥模型 Source// 输入数据（Source）-> 对数据进行滤波(Filter)操作 -> 然后对数据进行映射（vtkMapper）->// 将其封装成一个对象(vtkActor)->将这个对象添加到渲染场景（vtkRenderer）中，再利用渲染窗口->（vtkRenderWindow）中进行渲染展示。vtkSmartPointer<vtkConeSource> cone = vtkSmartPointer<vtkConeSource>::New();cone->SetHeight(3.0);cone->SetRadius(1.0);cone->SetResolution(10.0);cone->SetCenter(2, 2, 2);// 映射器 MappervtkSmartPointer<vtkPolyDataMapper> coneMapper = vtkSmartPointer<vtkPolyDataMapper>::New();coneMapper->SetInputConnection(cone->GetOutputPort());// 对象 ActorvtkSmartPointer<vtkActor> coneActor = vtkSmartPointer<vtkActor>::New();coneActor->SetMapper(coneMapper);// 添加坐标轴vtkSmartPointer<vtkAxesActor> actor2 = vtkSmartPointer<vtkAxesActor>::New();actor2->SetPosition(0, 0, 0);//设置中心点actor2->SetTotalLength(2, 2, 2);//设置坐标轴长度actor2->SetShaftType(0);actor2->SetAxisLabels(0);//坐标轴方向x,y,z是否显示，内部为bool类型actor2->SetCylinderRadius(0.02);//设置坐标轴宽度// 渲染vtkSmartPointer<vtkRenderer> coneRender = vtkSmartPointer<vtkRenderer>::New();coneRender->AddActor(coneActor);coneRender->AddActor(actor2);coneRender->SetBackground(0.0, 0.5, 0.5);// 加入灯光,灯光肯定不是唯一的，是可以存在多个的。首先我们先实例化一个灯光，灯光颜色设置为绿色、位置在（0，0，1）//加入灯光//**灯光1vtkSmartPointer<vtkLight> light1 = vtkSmartPointer<vtkLight>::New();light1->SetColor(0, 1, 0);//设置灯光颜色为绿色light1->SetPosition(0, 0, 1);//设置灯光的位置light1->SetFocalPoint(coneRender->GetActiveCamera()->GetFocalPoint());//设置灯光的焦点coneRender->AddLight(light1);//将其添加到渲染场景中//**灯光2vtkSmartPointer<vtkLight>light2 = vtkSmartPointer<vtkLight>::New();light2->SetColor(1, 0, 0);light2->SetPosition(0, 0, -1);light2->SetFocalPoint(coneRender->GetActiveCamera()->GetFocalPoint());coneRender->AddLight(light2);//相机//**方法一//vtkSmartPointer<vtkCamera>camera = vtkSmartPointer<vtkCamera>::New();//camera->SetPosition(0, 5, 0);//camera->SetFocalPoint(0, 0, 0);//camera->SetViewUp(0, 0, 0.5);//coneRender->SetActiveCamera(camera);// 方法二（使用自带的相机进行设置）coneRender->GetActiveCamera()->SetPosition(0,5,0);coneRender->GetActiveCamera()->SetFocalPoint(0, 0, 0);coneRender->GetActiveCamera()->SetViewUp(0, 0, 0.5);coneRender->ResetCamera();// 渲染窗口vtkSmartPointer<vtkRenderWindow> coneWin = vtkSmartPointer<vtkRenderWindow>::New();coneWin->AddRenderer(coneRender);ui.qvtkWidget_3->SetRenderWindow(coneWin);}void QtVTKTest::VTKWidget5()
{// 数据vtkSmartPointer<vtkSphereSource> sphereSource =    vtkSmartPointer<vtkSphereSource>::New();sphereSource->SetCenter(0.1, 0.1, 0.1);sphereSource->SetRadius(0.5);// 映射器vtkSmartPointer<vtkPolyDataMapper> sphereMapper = vtkSmartPointer<vtkPolyDataMapper>::New();sphereMapper->SetInputConnection(sphereSource->GetOutputPort());// 演员vtkSmartPointer<vtkActor> sphereActor =vtkSmartPointer<vtkActor>::New();sphereActor->SetMapper(sphereMapper);// 渲染vtkSmartPointer<vtkRenderer> renderer =vtkSmartPointer<vtkRenderer>::New();renderer->AddActor(sphereActor);renderer->SetBackground(0.0, 0.6, 0.6);// 窗口vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New();renderWindow->AddRenderer(renderer);ui.qvtkWidget_4->SetRenderWindow(renderWindow);}void QtVTKTest::VTKWidget6()
{// Source(生成一个中心在渲染场景原点圆柱体、并设置高，半径，柱体横截面的等边多边形的边数)vtkSmartPointer<vtkCylinderSource> cylinder =  vtkSmartPointer<vtkCylinderSource>::New();cylinder->SetHeight(3.0);cylinder->SetRadius(1.0);cylinder->SetResolution(10);// 映射器（渲染多边形几何数据，将输入的数据转成几何图元）vtkSmartPointer<vtkPolyDataMapper> cylinderMapper = vtkSmartPointer<vtkPolyDataMapper>::New();cylinderMapper->SetInputConnection(cylinder->GetOutputPort());// 演员 （派生自vtkProp类，渲染场景中数据的可视化）vtkSmartPointer<vtkActor> cylinderActor = vtkSmartPointer<vtkActor>::New();cylinderActor->SetMapper(cylinderMapper);// 加载PNG图片vtkSmartPointer<vtkPNGReader>pngReader = vtkSmartPointer<vtkPNGReader>::New();pngReader->SetFileName("C:\\Users\\Administrator\\Desktop\\新建文件夹\\111.png");vtkSmartPointer<vtkTexture>texture = vtkSmartPointer<vtkTexture>::New();texture->SetInputConnection(pngReader->GetOutputPort());texture->InterpolateOn();// Actor贴纹理图cylinderActor->SetTexture(texture);// 渲染（负责管理场景的渲染过程）vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();renderer->AddActor(cylinderActor);renderer->SetBackground(0.1, 0.2, 0.4);// 设置灯光vtkSmartPointer<vtkLight> myLight = vtkSmartPointer<vtkLight>::New();myLight->SetColor(0, 1, 0);myLight->SetPosition(0, 0, 1);myLight->SetFocalPoint(renderer->GetActiveCamera()->GetFocalPoint());renderer->AddLight(myLight);vtkSmartPointer<vtkLight> myLight2 = vtkSmartPointer<vtkLight>::New();myLight2->SetColor(0, 0, 1);myLight2->SetPosition(0, 0, -1);myLight2->SetFocalPoint(renderer->GetActiveCamera()->GetFocalPoint());renderer->AddLight(myLight2);// （操作系统与VTK渲染引擎连接到一起,可以有多个vtkRenderer对象）ui.qvtkWidget_5->GetRenderWindow()->AddRenderer(renderer);//vtkSmartPointer<vtkRenderWindow> renWin = vtkSmartPointer<vtkRenderWindow>::New();//renWin->AddRenderer(renderer);//vtkSmartPointer<vtkRenderWindowInteractor> iren = vtkSmartPointer<vtkRenderWindowInteractor>::New();//iren->SetRenderWindow(renWin);//vtkSmartPointer<vtkInteractorStyleTrackballCamera> style = vtkSmartPointer<vtkInteractorStyleTrackballCamera>::New();//iren->SetInteractorStyle(style);//iren->Initialize();//iren->Start();
}void QtVTKTest::VTKWidget7()
{vtkSmartPointer< vtkImageViewer2 > m_pImageViewer = vtkSmartPointer< vtkImageViewer2 >::New();vtkSmartPointer< vtkRenderer > m_pRenderder = vtkSmartPointer< vtkRenderer >::New();// 设置m_QVTKWidget的渲染器  vtkSmartPointer<vtkPNGReader>pngReader = vtkSmartPointer<vtkPNGReader>::New();pngReader->SetFileName("C:\\Users\\Administrator\\Desktop\\新建文件夹\\111.png");pngReader->Update();// 将reader的输出作为m_pImageViewer的输入，并设置m_pImageViewer与渲染器m_pRenderer的关联m_pImageViewer->SetInputData(pngReader->GetOutput());m_pImageViewer->SetRenderWindow(ui.qvtkWidget_6->GetRenderWindow());m_pImageViewer->Render();vtkEventQtSlotConnect* m_Connections = vtkEventQtSlotConnect::New();m_Connections->Connect(ui.qvtkWidget_6->GetRenderWindow()->GetInteractor(),vtkCommand::MouseMoveEvent,this,SLOT(updateCoords(vtkObject*)));
}void QtVTKTest::updateCoords(vtkObject* obj)
{// 获取交互器vtkRenderWindowInteractor* iren = vtkRenderWindowInteractor::SafeDownCast(obj);// 获取鼠标的当前位置int event_pos[2];iren->GetEventPosition(event_pos);QString str;str.sprintf("x=%d : y=%d", event_pos[0], event_pos[1]);qDebug() << str;//m_StatusBar->showMessage(str);
}

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QT5.9 VTK8.2 基础学习（1）

文章目录

1、VTK介绍

2、实例

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