偏移曲线代码

• 回答：

      void CTestCommands::OffsetPolyline()
      {
          ads_name entName;
          ads_point pt;        if(acedEntSel(_T("需要偏移的PL线:"),entName,pt) != RTNORM)
          {            return;
          }
  
          AcDbObjectId objId;        if(acdbGetObjectId(objId,entName) != Acad::eOk)            return;        McDbObjectPointer<McDbPolyline> spPolyline(objId,AcDb::kForRead);        if(spPolyline.openStatus() != Acad::eOk)
          {
              acutPrintf(_T("n 请选择Polyline"));            return;
          }
  
  
          ads_point tmpPt1;        if(acedGetPoint(NULL,_T("n 点取偏移点："),tmpPt1) != RTNORM)
          {            return;
          }
  
          ads_point tmpPt2;        if(acedGetPoint(tmpPt1,_T("n 点取偏移距离："),tmpPt2) != RTNORM)
          {
              return;
          }
  
          McGePoint3d pt1 = asPnt3d(tmpPt1);
          McGePoint3d pt2 = asPnt3d(tmpPt2);
  
          double dDis = pt1.distanceTo(pt2);
          if(fabs(dDis) < 0.01)
          {
              acutPrintf(_T("n 偏移距离为太小"));            return;
          }        McGePoint3d ptRef = pt1;
          McDbVoidPtrArray offsetCurves;        if(spPolyline->getOffsetCurvesEx(dDis,offsetCurves,ptRef) != Mcad::eOk)
          {
              acutPrintf(_T("n 未知原因，偏移失败"));
              return;
          }
  
          // 对偏移后的PL线，按偏移距离，把突出的角导圆角。
          McGePoint3d startPt;
          spPolyline->getStartPoint(startPt);
  
          for(int i = 0 ; i < offsetCurves.length();i++)
          {
              McDbEntity* pEnt = (McDbEntity*)(offsetCurves[i]);
              ASSERT(pEnt != NULL);
  
              if(McDbPolyline::cast(pEnt) != NULL)
              {
                  McDbPolyline* pNewPolyline = GetNewPolyline(startPt,McDbPolyline::cast(pEnt),dDis );
                  if(pNewPolyline != NULL)
                  {
                      MrxDbgUtils::addToCurrentSpace(pNewPolyline);
                      pNewPolyline->close();
                      delete pEnt;
                      pEnt = NULL;
                  }
  
              }
  
              if(pEnt != NULL)
              {
                  MrxDbgUtils::addToCurrentSpaceAndClose(pEnt);
              }
          }
      }