VTK如何进行分线程渲染？请写一个示例代码

您好，以下是一个简单的示例代码，展示了如何使用VTK进行分线程渲染：

#include <vtkSmartPointer.h>
#include <vtkMultiThreader.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkConeSource.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>

void render(vtkRenderer* renderer)
{
renderer->GetRenderWindow()->Render();
}

int main(int, char*[])
{
// 创建一个锥体网格数据
vtkSmartPointer<vtkConeSource> coneSource =
vtkSmartPointer<vtkConeSource>::New();
coneSource->Update();

// 创建一个渲染器和窗口
vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
renderWindow->AddRenderer(renderer);

// 将锥体网格数据放入一个Actor中
vtkSmartPointer<vtkPolyDataMapper> mapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
mapper->SetInputData(coneSource->GetOutput());
vtkSmartPointer<vtkActor> actor =
vtkSmartPointer<vtkActor>::New();
actor->SetMapper(mapper);

// 将Actor添加到渲染器中
renderer->AddActor(actor);
renderer->ResetCamera();

// 创建交互器并初始化窗口大小
vtkSmartPointer<vtkRenderWindowInteractor> interactor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
interactor->SetRenderWindow(renderWindow);

// 创建多线程渲染器
vtkSmartPointer<vtkMultiThreader> threader =
vtkSmartPointer<vtkMultiThreader>::New();
threader->SetNumberOfThreads(2); // 设置线程数量

// 启动交互器并开始渲染
renderWindow->Render();
interactor->Initialize();
threader->SpawnThread((vtkThreadFunctionType)render, renderer);
interactor->Start();

return 0;
}

希望这个示例代码能对您有所帮助！