ARX定义lisp函数之-创建直线

286168051

用法 (CREATELINE pt1 pt2)
static int ads_createline(void)
{
  //----- Remove the following line if you do not expect any argument for this ADS function
  struct resbuf *rb =acedGetArgs () ;
  // TODO: add your code here
  if (rb == NULL)
  {acdbFail(_T("参数太少"));
  acedRetVoid();
   return RTERROR;
  }
  ads_point pt1;
  AcGePoint3d p1;
  if (rb->restype == RTPOINT || rb->restype == RT3DPOINT)
  {
   ads_point_set(rb->resval.rpoint,pt1);
   p1.x = pt1[X];p1.y = pt1[Y];p1.z = pt1[Z];
  }
  else
  {
   acdbFail(_T("参数错误"));
   acedRetVoid();
   return RTERROR;
  }
  rb = rb->rbnext;
  if (rb == NULL)
  {
   acdbFail(_T("参数太少"));
   acedRetVoid();
   return RTERROR;
  }
  ads_point pt2;
  AcGePoint3d p2;
  if (rb->restype == RTPOINT || rb->restype == RT3DPOINT)
  {
   ads_point_set(rb->resval.rpoint,pt2);
   p2.x = pt2[X];p2.y = pt2[Y];p2.z = pt2[Z];
  }
  else
  {acdbFail(_T("参数错误"));
  acedRetVoid();
   return RTERROR;
  }

  if (rb->rbnext !=NULL)
  {
   acdbFail(_T("参数太多"));
   acedRetVoid();
   return RTERROR;
  }
  AcDbLine *pLine = new AcDbLine(p1,p2);
  AcDbBlockTable *pBlkTbl;
  acdbHostApplicationServices()->workingDatabase()->getSymbolTable(pBlkTbl,AcDb::kForRead);
  AcDbBlockTableRecord *pBlkTblRcd;
  pBlkTbl->getAt(ACDB_MODEL_SPACE,pBlkTblRcd,AcDb::kForWrite);
  pBlkTbl->close();
  AcDbObjectId entId;
  pBlkTblRcd->appendAcDbEntity(entId,pLine);
  pBlkTblRcd->close();
  pLine->close();
  acedRetVoid();
  return RTNORM;
  // TODO: Replace the following line by your returned value if any
  acedRetVoid () ;

  return (RSRSLT) ;
}

wangph

能解释一下这三句是什么意思吗？
acedRetVoid();
  return RTNORM;
  return (RSRSLT) ;