ぬの部屋(仮)
nu-no-he-ya
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  • vtk 9.0で表示(7) + win32api

    VTKではなく、自作のウィンドウにレンダリングする方法。

    #pragma once
    
    // VTK内でstd::minにひっかからないため
    #define NOMINMAX
    
    #include<Windows.h>
    
    
    // VTK_MODULE_INITに必要
    #include <vtkAutoInit.h>
    
    #include <vtkSmartPointer.h>
    #include <vtkRenderer.h>
    #include <vtkRenderWindow.h>
    #include <vtkWin32RenderWindowInteractor.h> //win32api対応
    #include <vtkInteractorStyleImage.h>
    
    //円筒とその表示に必要
    #include <vtkCylinderSource.h>
    #include <vtkPolyDataMapper.h>
    
    
    #pragma comment(lib,"vtkCommonCore-9.0.lib")
    #pragma comment(lib,"vtkRenderingCore-9.0.lib")
    #pragma comment(lib,"vtkInteractionStyle-9.0.lib")
    #pragma comment(lib,"vtkFiltersSources-9.0.lib")
    #pragma comment(lib,"vtkCommonExecutionModel-9.0.lib")
    
    #pragma comment(lib,"vtkRenderingUI-9.0.lib") //win32api対応
    #pragma comment(lib,"vtkRenderingOpenGL2-9.0.lib")
    
    VTK_MODULE_INIT(vtkRenderingOpenGL2);
    VTK_MODULE_INIT(vtkInteractionStyle);
    
    
    vtkSmartPointer<vtkRenderWindowInteractor> iren;
    vtkSmartPointer<vtkRenderWindow> renWin;
    
    
    void init_vtk(HWND hwnd);
    LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp) {
    
      RECT rect;
      GetClientRect(hwnd, &rect);
    
      switch (msg) {
      case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
      case WM_ERASEBKGND://背景の描画を処理したことにする(ちらつき防止)
        return TRUE;
    
      case WM_PAINT:
        if (renWin) {
          //画面描画
          renWin->Render();
        }
        return 0;
      case WM_SIZING:
        //ウィンドウサイズ設定
        renWin->SetSize(rect.right, rect.bottom);
        InvalidateRect(hwnd, nullptr, FALSE);
        return 0;
      }
      return DefWindowProc(hwnd, msg, wp, lp);
    }
    
    
    int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
      PSTR lpCmdLine, int nCmdShow) {
      HWND hwnd;
      WNDCLASS winc;
      MSG msg;
    
      winc.style = CS_HREDRAW | CS_VREDRAW;
      winc.lpfnWndProc = WndProc;
      winc.cbClsExtra = winc.cbWndExtra = 0;
      winc.hInstance = hInstance;
      winc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
      winc.hCursor = LoadCursor(NULL, IDC_ARROW);
      winc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
      winc.lpszMenuName = NULL;
      winc.lpszClassName = TEXT("VTK-TEST");
    
      if (!RegisterClass(&winc)) return 0;
    
      hwnd = CreateWindow(
        TEXT("VTK-TEST"), TEXT("vtk test"),
        WS_OVERLAPPEDWINDOW | WS_VISIBLE ,
        CW_USEDEFAULT, CW_USEDEFAULT,
        500, 500,
        NULL, NULL,
        hInstance, NULL
      );
    
      if (hwnd == NULL) return 0;
    
    
      init_vtk(hwnd);
    

    while (GetMessage(&msg, NULL, 0, 0)) DispatchMessage(&msg); return msg.wParam; }
    void init_vtk(HWND hwnd) {
      //////////////////////////////////////////////////////////////////
      //////////////////////////////////////////////////////////////////
      //////////////////////////////////////////////////////////////////
      //////////////////////////////////////////////////////////////////
      // Create a vtkCylinderSource
      vtkSmartPointer<vtkCylinderSource> cylinderSource = vtkSmartPointer<vtkCylinderSource>::New();
      cylinderSource->SetCenter(0.0, 0.0, 0.0);
      cylinderSource->SetRadius(5.0);
      cylinderSource->SetHeight(7.0);
      cylinderSource->SetResolution(100);
      // Create a mapper and actor
      vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New();
      mapper->SetInputConnection(cylinderSource->GetOutputPort());
      vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
      actor->SetMapper(mapper);
    
      //////////////////////////////////////////////////////////////////
      //////////////////////////////////////////////////////////////////
      //////////////////////////////////////////////////////////////////
      //////////////////////////////////////////////////////////////////
    
      auto renderer = vtkSmartPointer<vtkRenderer>::New();
      renderer->AddActor(actor);
      renderer->ResetCamera();
    
      //////////////////////////////////////////////////////////////////
      //////////////////////////////////////////////////////////////////
      //////////////////////////////////////////////////////////////////
      //////////////////////////////////////////////////////////////////
      // VTKの表示領域をWin32apiのウィンドウに貼り付ける
    
      RECT rect;
      GetClientRect(hwnd, &rect);
    
      renWin = vtkRenderWindow::New();
      renWin->AddRenderer(renderer);
    
      renWin->SetParentId(hwnd);
      renWin->SetSize(rect.right, rect.bottom);
    
      iren = vtkSmartPointer<vtkWin32RenderWindowInteractor>::New();
    
      vtkSmartPointer<vtkInteractorStyleTrackballCamera> style =
        vtkSmartPointer<vtkInteractorStyleTrackballCamera>::New();
    
      iren->SetInteractorStyle(style);
      iren->SetRenderWindow(renWin);
    
    }