动态绘制接口

• 回答：

      void CTestVc2005Dlg::CustomEntity_ExplodeMxdrawxctrl1(LPDISPATCH pCustomEntity, LPDISPATCH pDraw, long* pRet)
      {        // TODO: 在此处添加消息处理程序代码
          *pRet = 1;
          IMxDrawCustomEntityPtr spDrawData;
          pCustomEntity->QueryInterface(&spDrawData);
  
          IMxDrawWorldDrawPtr spWordDraw;
          pDraw->QueryInterface(&spWordDraw);
  
          CString sGuid = spDrawData->Guid;        if(sGuid == MX_CUSTOM_ENTITY_ID)
          {            if(spDrawData->IsHave(_T("ept") )  != VARIANT_TRUE)                return;
  
              IMxDrawPointPtr stp =  spDrawData->GetPoint(_T("spt"));            if(stp == NULL)                return;
  
              IMxDrawPointPtr ept =  spDrawData->GetPoint(_T("ept"));            if(ept == NULL)                return;
  
              MxDrawXLib::IMxDrawUtilityPtr mxUtility;
              mxUtility.CreateInstance(__uuidof( MxDrawXLib::MxDrawUtility ));
  
  
              IMxDrawVector3dPtr vec = ept->SumVector(stp);
  
              vec->Mult(0.5);
  
              MxDrawXLib::IMxDrawPointPtr midPt;
              midPt.CreateInstance(__uuidof( MxDrawXLib::MxDrawPoint ));
  
              midPt->x = stp->x;
              midPt->y = stp->y;
              midPt->Add(vec);            double dAng = vec->Angle();
              dAng = mxUtility->GetDimAngle(dAng);            double dDis = 0.0;
              dDis = stp->DistanceTo(ept);
  
              CString sTxt;
              sTxt.Format(_T("L=%.3lf"),dDis);
  
              dAng = dAng * 180.0 / 3.14159265;
  
              vec->RotateByXyPlan(3.14159265 / 2.0);
              vec->Normalize();
              vec->Mult(10);
  
              stp->Add(vec);
              ept->Add(vec);
  
              spWordDraw->DrawLine(stp->x,stp->y,ept->x,ept->y);
  
              vec->Mult(2);
  
              stp->Sum(vec);
              ept->Sum(vec);
  
              spWordDraw->DrawLine(stp->x,stp->y,ept->x,ept->y);
  
              spWordDraw->SetColorIndex(1);
  
              spWordDraw->MxDrawText(midPt->x,midPt->y,sTxt.AllocSysString(),5,dAng,
                  mcHorizontalAlignmentCenter,mcVerticalAlignmentMiddle);
  
          }
      }