Occt learning 003 - MFC single document project

OCCT Study 003-----MFC Single document project creation

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background

window Develop software under the platform , frequently-used c++ Interface development mainly uses MFC, Although it has been almost eliminated in recent years , But for traditional software companies , Still not abandoned . Rising star Qt It's also very popular , I'll study it later , Here first from MFC break the ice .

The development of preparation

• vs2010 development environment
• occt 7.2 edition
  Abreast of the times vs It's already here 2019, The next version is estimated to be 2021 了 , But for the research mechanism , The difference is not great , Others can try .

Create project and environment configuration

establish MFC Single document project and running environment

• Set project name ：
  

• Set the engineering interface style
  

• Finally click Finish , Generated an empty MFC Single document framework program ：
  

• establish x64 Program
  

• Set the library path
  

• Fill in the dependency Library ：
  

    TKBin.lib;TKBinL.lib;TKBinTObj.lib;TKBinXCAF.lib;TKBO.lib;TKBool.lib;TKBRep.lib;TKCAF.lib;TKCDF.lib;TKD3DHost.lib;TKDCAF.lib;TKDFBrowser.lib;TKDraw.lib;TKernel.lib;TKFeat.lib;TKFillet.lib;TKG2d.lib;TKG3d.lib;TKGeomAlgo.lib;TKGeomBase.lib;TKHLR.lib;TKIGES.lib;TKIVtk.lib;TKIVtkDraw.lib;TKLCAF.lib;TKMath.lib;TKMesh.lib;TKMeshVS.lib;TKOffset.lib;TKOpenGl.lib;TKPrim.lib;TKQADraw.lib;TKService.lib;TKShapeView.lib;TKShHealing.lib;TKStd.lib;TKStdL.lib;TKSTEP.lib;TKSTEP209.lib;TKSTEPAttr.lib;TKSTEPBase.lib;TKSTL.lib;TKTInspector.lib;TKTInspectorAPI.lib;TKTObj.lib;TKTObjDRAW.lib;TKToolsDraw.lib;TKTopAlgo.lib;TKTopTest.lib;TKTreeModel.lib;TKV3d.lib;TKVCAF.lib;TKView.lib;TKViewerTest.lib;TKVInspector.lib;TKVRML.lib;TKXCAF.lib;TKXDEDRAW.lib;TKXDEIGES.lib;TKXDESTEP.lib;TKXMesh.lib;TKXml.lib;TKXmlL.lib;TKXmlTObj.lib;TKXmlXCAF.lib;TKXSBase.lib;TKXSDRAW.lib
  

• establish occ Running environment env.bat, You can refer to occ Medium custom.bat and evironment.bat

    set OCC_ROOT=F:\Project\occ\OpenCASCADE-7.2.0-vc10-64\opencascade-7.2.0
    set path=%path%;F:\Project\occ\OpenCASCADE-7.2.0-vc10-64\opencascade-7.2.0\win64\vc10\bin;F:\Project\occ\OpenCASCADE-7.2.0-vc10-64\ffmpeg-3.3-lgpl-64\bin;F:\Project\occ\OpenCASCADE-7.2.0-vc10-64\freeimage-3.17.0-vc10-64\bin;F:\Project\occ\OpenCASCADE-7.2.0-vc10-64\freetype-2.5.5-vc10-64\bin;F:\Project\occ\OpenCASCADE-7.2.0-vc10-64\gl2ps-1.3.8-vc10-64\bin;F:\Project\occ\OpenCASCADE-7.2.0-vc10-64\tbb_2017.0.100\bin\intel64\vc10;F:\Project\occ\OpenCASCADE-7.2.0-vc10-64\tcltk-86-64\bin;F:\Project\occ\OpenCASCADE-7.2.0-vc10-64\vtk-6.1.0-vc10-64\bin
  

• establish visual studio The startup environment in which the command runs Start.bat：

    call %~dp0\env.bat
    start "E:\Program Files (x86)\vs2010\Common7\IDE\devenv.exe" %~dp0\examples\OccEditor\OccEditor.sln
  

  Rerun Start.bat start-up IDE.

build occ and MFC Framework combined with code

• stay stdafx.h Add some header files in ：

    #pragma warning(  disable : 4244 )        // Issue warning 4244
    #include <Standard_ShortReal.hxx>
    #pragma warning(  default : 4244 )        // Issue warning 4244
  
    #include <Standard.hxx>
  
    #include <Aspect_DisplayConnection.hxx>
    #include <AIS_InteractiveContext.hxx>
    #include <AIS_Shape.hxx>
    #include <AIS_Point.hxx>
    #include <V3d_Viewer.hxx>
    #include <V3d_View.hxx>
    #include <OpenGl_GraphicDriver.hxx>
    #include <WNT_Window.hxx>
    #include <Standard_ErrorHandler.hxx>
  

• stay occEditor.h Define graphics device environment variables

    public:
    	Handle_Graphic3d_GraphicDriver GetGraphicDriver() const; 
    private:
    	Handle_Graphic3d_GraphicDriver m_hGraphicDriver;
  

• stay occEditor.cpp To implement functions in GetGraphicDriver() And initialization variables

    Handle_Graphic3d_GraphicDriver COccEditorApp::GetGraphicDriver() const
    {
    	return m_hGraphicDriver;
    }
  

• stay BOOL COccEditorApp::InitInstance() Initialization variables in ：

    // init occ
    try
    {
    	Handle(Aspect_DisplayConnection) aDisplayConnection;
    	m_hGraphicDriver = new OpenGl_GraphicDriver (aDisplayConnection);
    }
    catch(Standard_Failure)
    {
    	AfxMessageBox (_T("Fatal error during graphic initialization"), MB_ICONSTOP);
    	ExitProcess(1);
    }
  

  At this time, there may be errors in compilation ：

    	1>OccEditor.cpp(115): error C2661: “Standard_Transient::operator new”:  No overloaded function accepts  3  Parameters 
  

  Need to be in OccEditor.cpp Comment out the following New Overload declaration of , Other documents also need to be commented out .

    	//#ifdef _DEBUG
    	//#define new DEBUG_NEW
    	//#endif
  

• establish Viewer object

  • stay occEditorDoc.h In a statement ：

    public:
    Handle(V3d_Viewer) GetViewer(){ return m_hViewer;}
    Handle(AIS_InteractiveContext) GetAISContext(){ return m_hAISContext;}

      BOOL InitOCC();
    

    private:
    Handle(V3d_Viewer) m_hViewer;
    Handle(AIS_InteractiveContext) m_hAISContext;

  • In regard to cpp Implementation of relevant code in ：

      BOOL COccEditorDoc::InitOCC()
      {
      	Handle(Graphic3d_GraphicDriver) aGraphicDriver = ((COccEditorApp*)AfxGetApp())->GetGraphicDriver();
      	m_hViewer = new V3d_Viewer(aGraphicDriver); 
       
      	m_hViewer->SetDefaultLights();
      	m_hViewer->SetLightOn();
      	//myViewer->SetDefaultBackgroundColor(Quantity_NOC_BLUE1);// Change the background color 
       
      	m_hAISContext =new AIS_InteractiveContext(m_hViewer);  // Create an interactive document 
      	//m_hAISContext->DefaultDrawer()->UIsoAspect()->SetNumber(11);
      	//m_hAISContext->DefaultDrawer()->VIsoAspect()->SetNumber(11);
    
      // Here, set the display mode of the entity 
      m_hAISContext->SetDisplayMode(AIS_Shaded,Standard_True);
      m_hAISContext->SetAutomaticHilight(Standard_False);
      return TRUE;
      }
    

  • stay NewDocument Call in InitOcc() function

      BOOL COccEditorDoc::OnNewDocument()
      {
      	if (!CDocument::OnNewDocument())
      		return FALSE;
    
      	InitOCC();
    
      	return TRUE;
      }
    

• stay COccEditorView Class to realize the creation of visual components

  • OccEditorView.h Declare variables in ：

      private:
      	Handle_V3d_View m_hView;
      	Standard_Boolean m_bHlrModeIsOn;
      public:
      virtual void OnInitialUpdate();
      void FitAll();
    

  • OccEditorView.cpp Initialization and creation FitAll function ,OnInitialUpdate function

      void COccEditorView::OnInitialUpdate()
      {
      	CView::OnInitialUpdate();
      	m_bHlrModeIsOn  = Standard_False;
      	m_hView = GetDocument()->GetViewer()->CreateView();
      	m_hView->SetComputedMode(m_bHlrModeIsOn);
      	Handle(Graphic3d_GraphicDriver) graphicDriver = ((COccEditorApp*)AfxGetApp())->GetGraphicDriver();
       
      	Handle(WNT_Window) hWntWindow = new WNT_Window(GetSafeHwnd());
      	m_hView->SetWindow(hWntWindow);
      	if (!hWntWindow->IsMapped()) {
      		hWntWindow->Map();
      	}
      	hWntWindow->SetBackground(Quantity_NOC_SLATEBLUE2);
      	
      	//  structure OpenCaseCade Axis 
      	m_hView->ZBufferTriedronSetup(Quantity_NOC_RED, Quantity_NOC_GREEN, Quantity_NOC_BLUE1, 0.8, 0.05, 12);
      	m_hView->TriedronDisplay(Aspect_TOTP_LEFT_LOWER, Quantity_NOC_WHITE, 0.2, V3d_ZBUFFER);
      	
      	FitAll();
      	
      }
    
      void COccEditorView::FitAll() 
      { 
      	if (!m_hView.IsNull()) 
      		m_hView->FitAll();
      	m_hView->ZFitAll();
      }
    

thus , One of the simplest occ+MFC The framework has been built ：

Draw simple geometry

• add to MFC menu
  Open Explorer Ribbon resources , Add a category , Add a panel named sphere The button
  

• Add a message response
  Right mouse button , stay COccEditorView Class to add message response code ：

    void COccEditorView::OnSphere()
    {
    	DrawSphere(6);
    }
  

• add to DrawSphere Draw function implementation code ：

•    	void COccEditorView::DrawSphere(float radius)
    		{
    			BRepPrimAPI_MakeSphere mkSphere(radius);
    			TopoDS_Shape Sphere = mkSphere.Shape();
    			Handle(AIS_Shape) myAISSphere = new AIS_Shape(Sphere);
    			GetDocument()->GetAISContext()->Display(myAISSphere, Standard_False);
    			
    			FitAll();
    		}
  

• Final effect
  

Other features

• Add a mouse rotation scene
  add to MFC Drag the event with the left mouse button ：

    void COccEditorView::OnMouseMove(UINT nFlags, CPoint point)
    {
    	// TODO:  Add message handler code and / Or call the default value 
  
    	CView::OnMouseMove(nFlags, point);
  
    	  if(nFlags && MK_LBUTTON){ 
    	//myView->Rotate(point.x,point.y); 
    	m_hView->Rotation(point.x,point.y); 
    }
  

• The coordinate axis flashes

  Add the code here , The normal coordinate axis flickers frequently , There is no good way to track the code , The reason is the mouse mosemove Event internal call view::Rotation, Every time the function calls the graphics refresh , In this method mousemove It is not advisable to call directly , Update applications will be triggered frequently , We'll solve it later .

Postscript

So far , It's just a occ Learning head , Read some information about the basic data organization , The creation is not in-depth . But learn with interest , It will improve day by day . Later, I hope to separate the interface from the upper functions , packing occ function , Realize data abstraction , otherwise , The code is written in MFC In the code , Too messy .