项目初始设置
在VS2017中创建一个单文档MFC项目（本例以mOCCT为名称）
在项目属性的VC++页面设置包含目录、库目录，在链接器的输入中添加OCC库目录下的所有.lib文件名称
添加头文件
在stdafx.h中添加：
#include <BRepTools.hxx>
#include <Standard_DefineHandle.hxx>
#include <DsgPrs_LengthPresentation.hxx>
#include <GCPnts_TangentialDeflection.hxx>
#include <Geom_Axis2Placement.hxx>
#include <Geom_CartesianPoint.hxx>
#include <Geom_Line.hxx>
#include <Geom_Surface.hxx>
#include <BRepAdaptor_Surface.hxx>
#include <GeomAbs_CurveType.hxx>
#include <GeomAdaptor_Curve.hxx>
#include <GeomTools_Curve2dSet.hxx>
#include <gp_Vec.hxx>
#include <Graphic3d_NameOfMaterial.hxx>
#include <MMgt_TShared.hxx>
#include <OSD_Environment.hxx>
#include <Precision.hxx>
#include <Prs3d_IsoAspect.hxx>
#include <Prs3d_LineAspect.hxx>
#include <Prs3d_Projector.hxx>
#include <Prs3d_Text.hxx>
#include <Quantity_Factor.hxx>
#include <Quantity_Length.hxx>
#include <Quantity_NameOfColor.hxx>
#include <Quantity_PhysicalQuantity.hxx>
#include <Quantity_PlaneAngle.hxx>
#include <Quantity_TypeOfColor.hxx>
#include <SelectMgr_EntityOwner.hxx>
#include <SelectMgr_SelectableObject.hxx>
#include <SelectMgr_Selection.hxx>
#include <SelectMgr_SelectionManager.hxx>
#include <SelectMgr_ListOfFilter.hxx>
#include <SelectMgr_Filter.hxx>
#include <StdSelect_EdgeFilter.hxx>
#include <StdSelect_ShapeTypeFilter.hxx>
#include <Standard_Boolean.hxx>
#include <Standard_CString.hxx>
#include <Standard_ErrorHandler.hxx>
#include <Standard_Integer.hxx>
#include <Standard_IStream.hxx>
#include <Standard_Macro.hxx>
#include <Standard_NotImplemented.hxx>
#include <Standard_OStream.hxx>
#include <Standard_Real.hxx>
#include <StdPrs_Curve.hxx>
#include <StdPrs_Point.hxx>
#include <StdPrs_PoleCurve.hxx>
#include <TCollection_AsciiString.hxx>
#include <TColgp_Array1OfPnt2d.hxx>
#include <TColgp_HArray1OfPnt2d.hxx>
#include <TCollection_AsciiString.hxx>
#include <TColStd_HSequenceOfTransient.hxx>
#include <TColStd_MapIteratorOfMapOfTransient.hxx>
#include <TColStd_MapOfTransient.hxx>
#include <TopExp_Explorer.hxx>
#include <TopoDS.hxx>
#include <TopoDS_Compound.hxx>
#include <TopoDS_Shape.hxx>
#include <TopoDS_Solid.hxx>
#include <TopoDS_Vertex.hxx>
#include <TopExp.hxx>
#include <TopTools_HSequenceOfShape.hxx>
#include <UnitsAPI.hxx>
#include <V3d_View.hxx>
#include <V3d_Viewer.hxx>
#include <WNT_Window.hxx>
#include <Prs3d_PointAspect.hxx>
#include <AIS_Point.hxx>
#include <AIS_InteractiveContext.hxx>
#include <AIS_Shape.hxx>
#include <BRep_Tool.hxx>
#include <BRepAlgoAPI_Fuse.hxx>
#include <BRepBuilderAPI_MakeEdge.hxx>
#include <BRepBuilderAPI_MakeFace.hxx>
#include <BRepBuilderAPI_MakeWire.hxx>
#include <BRepBuilderAPI_MakeVertex.hxx>
#include <BRepBuilderAPI_Transform.hxx>
#include <BRepPrimAPI_MakeCone.hxx>
#include <BRepPrimAPI_MakeRevol.hxx>
#include <BRepFilletAPI_MakeFillet.hxx>
#include <BRepBuilderAPI_Copy.hxx>
#include <BRepBuilderAPI_MakePolygon.hxx>
#include <BRepLib.hxx>
#include <BRepOffsetAPI_MakeThickSolid.hxx>
#include <BRepOffsetAPI_ThruSections.hxx>
#include <BRepPrimAPI_MakeCylinder.hxx>
#include <BRepPrimAPI_MakePrism.hxx>
#include <BRepPrimAPI_MakeTorus.hxx>
#include <BRepAlgoAPI_Section.hxx>
#include <BRepPrimAPI_MakeSphere.hxx>
#include <BRepFeat_SplitShape.hxx>
#include <TColgp_HArray1OfPnt.hxx>
#include <GeomAPI_Interpolate.hxx>
#include <GC_MakeArcOfCircle.hxx>
#include <GC_MakeSegment.hxx>
#include <GC_MakeCircle.hxx>
#include <GCE2d_MakeSegment.hxx>
#include <gp.hxx>
#include <gp_Ax1.hxx>
#include <gp_Ax2.hxx>
#include <gp_Ax2d.hxx>
#include <gp_Dir.hxx>
#include <gp_Dir2d.hxx>
#include <gp_Pnt.hxx>
#include <gp_Pnt2d.hxx>
#include <gp_Trsf.hxx>
#include <gp_Vec.hxx>
#include <Geom_CylindricalSurface.hxx>
#include <Geom_Plane.hxx>
#include <Geom_Surface.hxx>
#include <Geom_TrimmedCurve.hxx>
#include <Geom2d_Ellipse.hxx>
#include <Geom2d_TrimmedCurve.hxx>
#include <TopExp_Explorer.hxx>
#include <TopoDS.hxx>
#include <TopoDS_Edge.hxx>
#include <TopoDS_Face.hxx>
#include <TopoDS_Wire.hxx>
#include <TopoDS_Shape.hxx>
#include <TopoDS_Compound.hxx>
#include <GCPnts_AbscissaPoint.hxx>
#include <BRepAdaptor_Curve.hxx>
#include <GeomLib.hxx>
#include <GeomConvert_CompCurveToBSplineCurve.hxx>
#include <TopTools_ListOfShape.hxx>
#include <TopTools_ListIteratorOfListOfShape.hxx>
#include <TopTools_DataMapOfShapeInteger.hxx>
#include <TopTools_DataMapOfShapeReal.hxx>
#include <TopTools_IndexedDataMapOfShapeAddress.hxx>
#include <V3d_PositionalLight.hxx>
#include <V3d_DirectionalLight.hxx>
#include <V3d_AmbientLight.hxx>
#include <IGESControl_Controller.hxx>
#include <IGESControl_Writer.hxx>
#include <Interface_Static.hxx>
#include <OpenGl_GraphicDriver.hxx>
#include <Graphic3d_GraphicDriver.hxx>
添加代码
MFC文档分成三个结构:
- Application
- Doc
- View
在Application中mOCCT.h中的类中加入代码：
Handle(Graphic3d_GraphicDriver) m_GraphicDriver;
在对应的类的实现文件mOCCT.cpp的类的构造函数中添加:
try {
Handle(Aspect_DisplayConnection) aDisplayConnection;
m_GraphicDriver = new OpenGl_GraphicDriver(aDisplayConnection);
}
catch (Standard_Failure) {
AfxMessageBox(L"(Error Ocured in Initializing the Opencascade graphic variable.)");
}
接着在头文件mOCCT.h中添加一个获取m_GraphicDriver的方法：
Handle(Graphic3d_GraphicDriver) GetGraphicDriver(){return m_GraphicDriver;}
接着处理Document Class在mOCCTDoc.h中定义的类中添加：
Handle(AIS_InteractiveContext) myAISContext;
Handle(V3d_Viewer) myViewer;
Handle(V3d_Viewer) GetViewer(void) {return myViewer;}
接着去实现文档mOCCTDoc.cpp中类的构造器中添加：
Handle(Graphic3d_GraphicDriver) theGraphicDriver = ((CmOCCTApp*)AfxGetApp())->GetGraphicDriver();
myViewer = new V3d_Viewer(theGraphicDriver);
myViewer->SetDefaultLights();
myViewer->SetLightOn();
myAISContext = new AIS_InteractiveContext(myViewer);
myAISContext->SetDisplayMode(AIS_Shaded,true);
myAISContext->SetAutomaticHilight(Standard_False);
去mOCCTView.h中在定义的CmOCCTView Class中添加：
Handle(V3d_View) myView;
并重写OnInitialUpdate()函数:
virtual void OnInitialUpdate();
在对应的实现文件中实现该函数：
void CmOCCTView::OnInitialUpdate() {
myView = GetDocument()->GetViewer()->CreateView();
myView->SetShadingModel(V3d_GOURAUD);
Handle(Graphic3d_GraphicDriver) theGraphicDriver = ((CmOCCTApp*)AfxGetApp())->GetGraphicDriver();
Aspect_Handle aWindowHandle = (Aspect_Handle)GetSafeHwnd();
Handle(WNT_Window) aWntWindow = new WNT_Window(GetSafeHwnd());
myView->SetWindow(aWntWindow);
if (!aWntWindow->IsMapped()) {
aWntWindow->Map();
}
Standard_Integer w = 100;
Standard_Integer h = 100;
aWntWindow->Size(w, h);
::PostMessage(GetSafeHwnd(), WM_SIZE, SIZE_RESTORED, w + h * 65536);
myView->FitAll();
myView->ZBufferTriedronSetup(Quantity_NOC_RED, Quantity_NOC_GREEN, Quantity_NOC_BLUE1, 0.8, 0.05, 12);
myView->TriedronDisplay(Aspect_TOTP_LEFT_LOWER, Quantity_NOC_WHITE, 0.2, V3d_ZBUFFER);
}
在下方的OnDraw中加入:
myView->MustBeResized();
myView->Update();
编译生成即可看到界面：
注意：
- 在添加代码时会在new关键字处报错
将当前文件下的
#ifdef _DEBUG
#define new DEBUG_NEW
#endif`
删去即可
2. 如果编译提醒缺少dll，请将opencascade的win64/vc14/bin目录以及所有第三方库的bin目录添加到系统环境变量Path，如此可以搜索到相应dll文件。或者将dll文件复制到exe文件目录下。
绘图
在mOCCTDoc.cpp和mOCCTDoc.h中写入DrawSphere代码：（需要在mOCCTDoc.cpp中include 头文件 #include “mOCCTView.h”）
//mOCCTDoc.cpp:
void CmOCCTDoc::DrawSphere(double Radius) {
BRepPrimAPI_MakeSphere mkSphere(Radius);
TopoDS_Shape Sphere = mkSphere.Shape();
Handle(AIS_Shape) myAISSphere = new AIS_Shape(Sphere);
myAISContext->Display(myAISSphere, Standard_False);
CMDIFrameWnd *pFrame = (CMDIFrameWnd*)AfxGetApp()->m_pMainWnd;
CMDIChildWnd *pChild = (CMDIChildWnd *)pFrame->GetActiveFrame();
CmOCCTView *pView = (CmOCCTView *)pChild->GetActiveView();
pView->FitAll();
}
//mOCCTDoc.h:
void CmOCCTDoc::DrawSphere(double Radius);
在mOCCTView.h中加入一个类方法：
void FitAll() { if (!myView.IsNull()) myView->FitAll(); myView->ZFitAll(); };
接着在CmOCCTView::OnDraw中调用绘球函数：
pDoc->DrawSphere(6);
编译生成即可
鼠标拖拽
在 mOCCTView.cpp及mOCCTView.h中添加OnMouseMove函数：
//mOCCTView.h
protected:
afx_msg void OnMouseMove(UINT nFlags, CPoint point);
// mOCCTView.cpp
BEGIN_MESSAGE_MAP(CmOCCTView, CView)
...
ON_WM_MOUSEMOVE()
...
END_MESSAGE_MAP()
...
void CmOCCTView::OnMouseMove(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
CView::OnMouseMove(nFlags, point);
if(nFlags && MK_LBUTTON){
myView->Rotate(point.x,point.y);
myView->Rotation(point.x,point.y);
}
}
如此可实现鼠标左键的拖拽旋转
参考资料：http://milindasf.blogspot.com/2014/03/how-to-build-simple-opencascade-program.html