QT+VTK实现鼠标位置输出

最新推荐文章于 2025-07-17 09:15:25 发布

原创最新推荐文章于 2025-07-17 09:15:25 发布 · 524 阅读

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CC 4.0 BY-SA版权

文章标签：

#qt

文章描述了一个使用Qt和VTK库在窗口应用程序中加载PLY模型文件，进行3D渲染并响应鼠标事件的示例。它展示了如何创建窗口、设置渲染器、连接事件处理函数以及清理内存的过程。

#include "QT_Demo.h"

QString path = "C:\\Users\\C230524\\Desktop\\QT_Demo\\x64\\Debug\\engine.ply";

QT_Demo::QT_Demo(QWidget* parent): QMainWindow(parent)
{
	//窗体初始化
	ui.setupUi(this);

	connect(ui.pushButton, &QPushButton::pressed, this, &QT_Demo::push_Clicked);
	//connect(ui.pushButton, SIGNAL(triggered()), this, SLOT(push_Clicked()));
}

QT_Demo::~QT_Demo()
{
}

void QT_Demo::push_Clicked()
{
	//读取模型
	vtkSmartPointer<vtkPLYReader> read = vtkSmartPointer<vtkPLYReader>::New();
	read->SetFileName(path.toUtf8());
	read->Update();
	//建立管线
	vtkSmartPointer<vtkPolyDataMapper> cylinderMapper = vtkSmartPointer<vtkPolyDataMapper>::New();
	cylinderMapper->SetInputData(read->GetOutput());
	cylinderMapper->Update();
	//Actor
	vtkSmartPointer<vtkActor> cylinderActor = vtkSmartPointer<vtkActor>::New();
	cylinderActor->SetMapper(cylinderMapper);
	//场景
	vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();
	renderer->AddActor(cylinderActor);
	renderer->SetBackground(0.1, 0.2, 0.4);
	//场景交互
	vtkSmartPointer<vtkRenderWindowInteractor> interactor = vtkSmartPointer<vtkRenderWindowInteractor>::New();
	//VTK事件触发QT槽
	vtkSmartPointer<vtkEventQtSlotConnect> slot = vtkSmartPointer<vtkEventQtSlotConnect>::New();
	slot->Connect(interactor, vtkCommand::MouseMoveEvent, this, SLOT(onMouse(vtkObject*)));
	//交互方式
	vtkSmartPointer<vtkInteractorStyleTrackballCamera> style = vtkSmartPointer<vtkInteractorStyleTrackballCamera>::New();
	interactor->SetInteractorStyle(style);
	//渲染
	ui.VtkWindow->renderWindow()->AddRenderer(renderer);
	ui.VtkWindow->renderWindow()->SetInteractor(interactor);
	ui.VtkWindow->renderWindow()->Render();

	interactor->Initialize();
	interactor->Start();
	//清空
	cylinderMapper->Delete();
	cylinderActor->Delete();
	renderer->Delete();
	read->Delete();
	slot->Delete();
}

void QT_Demo::onMouse(vtkObject* obj)
{
	vtkRenderWindowInteractor* intactor = vtkRenderWindowInteractor::SafeDownCast(obj);

	int event_points[2];
	intactor->GetEventPosition(event_points);

	QString str;
	str.sprintf("X=%d:Y=%d", event_points[0], event_points[1]);
	ui.statusBar->showMessage(str);
}