|
要在VTK中模拟内镜手术并生成结肠器官模型,同时在结肠中创建内窥镜运动路径,并通过上下键控制路径的运动,可以按照以下步骤进行:
- 创建结肠模型:使用VTK的几何建模功能创建结肠的3D模型。
- 生成内窥镜路径:在结肠模型中生成一条内窥镜的运动路径。
- 控制路径运动:通过捕捉键盘事件来控制内窥镜沿路径的运动。
以下是一个示例代码,展示如何实现这些步骤:
- #include <vtkSmartPointer.h>
- #include <vtkPoints.h>
- #include <vtkParametricSpline.h>
- #include <vtkParametricFunctionSource.h>
- #include <vtkPolyDataMapper.h>
- #include <vtkActor.h>
- #include <vtkRenderer.h>
- #include <vtkRenderWindow.h>
- #include <vtkRenderWindowInteractor.h>
- #include <vtkCamera.h>
- #include <vtkCallbackCommand.h>
- #include <vtkCommand.h>
- // 全局变量用于控制相机位置
- double t = 0.0;
- vtkSmartPointer<vtkParametricSpline> spline;
- void KeypressCallbackFunction(vtkObject* caller, long unsigned int eventId, void* clientData, void* callData)
- {
- vtkRenderWindowInteractor* interactor = static_cast<vtkRenderWindowInteractor*>(caller);
- // 获取按键
- std::string key = interactor->GetKeySym();
- // 根据按键调整t值
- if (key == "Up")
- {
- t += 0.01;
- }
- else if (key == "Down")
- {
- t -= 0.01;
- }
- // 限制t值范围
- if (t < 0.0) t = 0.0;
- if (t > 1.0) t = 1.0;
- // 获取相机位置
- double p[3];
- spline->Evaluate(t, p, nullptr);
- // 设置相机位置
- vtkCamera* camera = static_cast<vtkRenderer*>(clientData)->GetActiveCamera();
- camera->SetPosition(p);
- camera->SetFocalPoint(p[0] + 1, p[1], p[2]); // 假设内窥镜向前看
- }
- int main(int, char *[])
- {
- // 创建路径点
- vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();
- points->InsertNextPoint(0.0, 0.0, 0.0);
- points->InsertNextPoint(1.0, 2.0, 0.0);
- points->InsertNextPoint(2.0, 4.0, 0.0);
- points->InsertNextPoint(3.0, 6.0, 0.0);
- // 创建样条曲线
- spline = vtkSmartPointer<vtkParametricSpline>::New();
- spline->SetPoints(points);
- // 创建样条曲线源
- vtkSmartPointer<vtkParametricFunctionSource> splineSource = vtkSmartPointer<vtkParametricFunctionSource>::New();
- splineSource->SetParametricFunction(spline);
- splineSource->Update();
- // 创建相机
- vtkSmartPointer<vtkCamera> camera = vtkSmartPointer<vtkCamera>::New();
- // 创建渲染器、渲染窗口和交互器
- vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();
- vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New();
- renderWindow->AddRenderer(renderer);
- vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New();
- renderWindowInteractor->SetRenderWindow(renderWindow);
- // 创建样条曲线的映射器和演员
- vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New();
- mapper->SetInputConnection(splineSource->GetOutputPort());
- vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
- actor->SetMapper(mapper);
- // 添加演员到渲染器
- renderer->AddActor(actor);
- // 设置相机初始位置
- camera->SetPosition(0, 0, 5);
- renderer->SetActiveCamera(camera);
- // 设置键盘回调函数
- vtkSmartPointer<vtkCallbackCommand> keypressCallback = vtkSmartPointer<vtkCallbackCommand>::New();
- keypressCallback->SetCallback(KeypressCallbackFunction);
- keypressCallback->SetClientData(renderer);
- renderWindowInteractor->AddObserver(vtkCommand::KeyPressEvent, keypressCallback);
- // 渲染并开始交互
- renderWindow->Render();
- renderWindowInteractor->Start();
- return EXIT_SUCCESS;
- }
复制代码 |
|