用QT给我写一个可以显示点云的代码

你好，我可以回答这个问题。以下是用QT显示点云的代码示例：

#include <QApplication>
#include <QMainWindow>
#include <QVTKWidget.h>
#include <vtkSmartPointer.h>
#include <vtkPLYReader.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderer.h>

int main(int argc, char *argv[])
{
QApplication a(argc, argv);

QMainWindow mainWindow;
QVTKWidget *vtkWidget = new QVTKWidget(&mainWindow);
mainWindow.setCentralWidget(vtkWidget);

vtkSmartPointer<vtkPLYReader> reader = vtkSmartPointer<vtkPLYReader>::New();
reader->SetFileName("point_cloud.ply");
reader->Update();

vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New();
mapper->SetInputConnection(reader->GetOutputPort());

vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
actor->SetMapper(mapper);

vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();
renderer->AddActor(actor);

vtkWidget->GetRenderWindow()->AddRenderer(renderer);

mainWindow.show();

return a.exec();
}

希望对你有帮助！