如何使用 VTK 加载 STL 文件显示 3D 模型？

void loadFileWhitSTL(vtkSmartPointer<vtkRenderer> renderer);
void createText(vtkSmartPointer<vtkRenderer> renderer);
void createAxes(vtkSmartPointer<vtkRenderer> renderer);
void createGround(vtkSmartPointer<vtkRenderer> renderer);



int main(int, char *[])
{
	vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();
	vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New();
	renderWindow->AddRenderer(renderer);
	vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New();
	renderWindowInteractor->SetRenderWindow(renderWindow);
	vtkSmartPointer<vtkInteractorStyleTrackballCamera> style = vtkSmartPointer<vtkInteractorStyleTrackballCamera>::New();
	renderWindowInteractor->SetInteractorStyle(style);

	loadFileWhitSTL(renderer);
	createText(renderer);
	createAxes(renderer);
	createGround(renderer);

	renderer->SetBackground(.2, .2, .2);
	renderer->ResetCameraClippingRange();
		  
	renderWindow->Render();
	renderWindowInteractor->Initialize();
	renderWindowInteractor->Start();

	return EXIT_SUCCESS;
}

void loadFileWhitSTL(vtkSmartPointer<vtkRenderer> renderer) 
{
	const char *path = R"(D:QtQmakeVTKstl5e1bd9bc2958e.stl)";

	vtkSmartPointer<vtkSTLReader> reader = vtkSmartPointer<vtkSTLReader>::New();
	reader->SetFileName(path);
	reader->Update();

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

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

void createText(vtkSmartPointer<vtkRenderer> renderer) 
{
	vtkSmartPointer<vtkVectorText> text = vtkSmartPointer<vtkVectorText>::New();
	text->SetText("20200311");
	text->Update();

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

	vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
	actor->SetMapper(mapper);
	actor->SetPosition(5.0, 5.0, 30.0);
	actor->SetScale(10.0);
	actor->GetProperty()->SetPointSize(48);
	actor->GetProperty()->SetColor(1.0, 0.0, 0.0);
	renderer->AddActor(actor);
}

void createAxes(vtkSmartPointer<vtkRenderer> renderer)
{
	//轴
	vtkSmartPointer<vtkAxesActor> axes = vtkSmartPointer<vtkAxesActor>::New();
	axes->SetTotalLength(150.0, 100.0, 50.0);
	axes->SetShaftType(vtkAxesActor::CYLINDER_SHAFT);//设置轴类型圆柱形状
	axes->SetCylinderRadius(0.01);
	axes->GetXAxisCaptionActor2D()->SetWidth(0.03);
	axes->GetYAxisCaptionActor2D()->SetWidth(0.03);
	axes->GetZAxisCaptionActor2D()->SetWidth(0.03);

	renderer->AddActor(axes);
}

//底板
void createGround(vtkSmartPointer<vtkRenderer> renderer)
{
	vtkSmartPointer<vtkPlaneSource> plane = vtkSmartPointer<vtkPlaneSource>::New();
	plane->SetXResolution(50);
	plane->SetYResolution(50);
	plane->SetCenter(0, 0, 0);
	plane->SetNormal(0, 0, 1);

	vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New();
	mapper->SetInputConnection(plane->GetOutputPort());
	vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
	actor->SetMapper(mapper);
	actor->SetScale(300.0, 300.0, 1.0);
	actor->GetProperty()->SetRepresentationToWireframe();

	renderer->AddActor(actor);
}