vtk世界坐标拾取器 

  1 /**
  2  * @file main.cpp
  3  * @brief vtk世界坐标拾取器
  4  * @author 禅元天道(chanyuantiandao@126.com)
  5  * @version 1.0.0
  6  * @date 2022-07-19
  7  */
  8 #include <vtkActor.h>
  9 #include <vtkInteractorStyleTrackballCamera.h>
 10 #include <vtkNamedColors.h>
 11 #include <vtkNew.h>
 12 #include <vtkObjectFactory.h>
 13 #include <vtkPolyDataMapper.h>
 14 #include <vtkProperty.h>
 15 #include <vtkRenderWindow.h>
 16 #include <vtkRenderWindowInteractor.h>
 17 #include <vtkRenderer.h>
 18 #include <vtkRendererCollection.h>
 19 #include <vtkSphereSource.h>
 20 #include <vtkWorldPointPicker.h>
 21 
 22 #include "vtkAutoInit.h" 
 23 VTK_MODULE_INIT(vtkRenderingOpenGL2);
 24 VTK_MODULE_INIT(vtkInteractionStyle);
 25 VTK_MODULE_INIT(vtkRenderingFreeType)
 26 
 27 namespace {
 28 
 29     // Define interaction style
 30     class MouseInteractorStyle : public vtkInteractorStyleTrackballCamera
 31     {
 32     public:
 33         static MouseInteractorStyle* New();
 34         vtkTypeMacro(MouseInteractorStyle, vtkInteractorStyleTrackballCamera);
 35 
 36         virtual void OnLeftButtonDown() override
 37         {
 38             // 鼠标点击点
 39             std::cout << "Picking pixel: " << this->Interactor->GetEventPosition()[0]
 40                 << " " << this->Interactor->GetEventPosition()[1] << std::endl;
 41 
 42             this->Interactor->GetPicker()->Pick(this->Interactor->GetEventPosition()[0],
 43                 this->Interactor->GetEventPosition()[1], 0, // 二维世界，z为0
 44                 this->Interactor->GetRenderWindow()
 45                 ->GetRenderers()
 46                 ->GetFirstRenderer());
 47 
 48             // 获取世界坐标值
 49             double picked[3];
 50             this->Interactor->GetPicker()->GetPickPosition(picked);
 51 
 52             std::cout << "Picked value: " << picked[0] << " " << picked[1] << " "
 53                 << picked[2] << std::endl;
 54 
 55             // 事件转发
 56             vtkInteractorStyleTrackballCamera::OnLeftButtonDown();
 57         }
 58     };
 59     vtkStandardNewMacro(MouseInteractorStyle);
 60 
 61 } // namespace
 62 
 63 
 64 int main()
 65 {
 66     vtkNew<vtkNamedColors> colors;
 67 
 68     vtkNew<vtkSphereSource> sphereSource;
 69     sphereSource->Update();
 70 
 71     vtkNew<vtkPolyDataMapper> mapper;
 72     mapper->SetInputConnection(sphereSource->GetOutputPort());
 73     vtkNew<vtkActor> actor;
 74     actor->SetMapper(mapper);
 75     actor->GetProperty()->SetColor(colors->GetColor3d("MistyRose").GetData());
 76 
 77     vtkNew<vtkRenderer> renderer;
 78     vtkNew<vtkRenderWindow> renderWindow;
 79     renderWindow->AddRenderer(renderer);
 80     renderWindow->SetWindowName("WorldPointPicker");
 81 
 82     // ①世界坐标拾取器
 83     vtkNew<vtkWorldPointPicker> worldPointPicker;
 84     vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
 85     // ②设置拾取器
 86     renderWindowInteractor->SetPicker(worldPointPicker);
 87     renderWindowInteractor->SetRenderWindow(renderWindow);
 88 
 89     // ③设置交互样式，处理事件
 90     vtkNew<MouseInteractorStyle> style;
 91     renderWindowInteractor->SetInteractorStyle(style);
 92 
 93     renderer->AddActor(actor);
 94     renderer->SetBackground(colors->GetColor3d("SlateGray").GetData());
 95 
 96     renderWindow->Render();
 97     renderWindowInteractor->Start();
 98 
 99     return EXIT_SUCCESS;
100 }

 

posted @ 2022-07-19 14:00  禅元天道  阅读(615)  评论(0)    收藏  举报