直线、圆弧如何转换成多义线

netspyboy

如题直线（AcDbLine）圆弧（AcDbArc）如何转换成多义线（AcDbPolyline）？

我想给直线添加宽度，故转换为多义线（pline->setLineWeight()不是我的答案）

我想用多义线的pPolyline->setWidthsAt(i,PL_Width,PL_Width);

跪求转换方法，

rongyifei

AcDbObjectId PostToMS(AcDbEntity *pEnt)
{
 AcDbBlockTable *pBlkTbl;
 acdbHostApplicationServices()->workingDatabase()->getBlockTable(pBlkTbl,
  AcDb::kForRead);
 AcDbBlockTableRecord *pMS;
 pBlkTbl->getAt(ACDB_MODEL_SPACE,pMS,AcDb::kForWrite);
 pBlkTbl->close();
 AcDbObjectId EntID;
 pMS->appendAcDbEntity(EntID,pEnt);
 pMS->close();
 return EntID;
}

 

static void ROYMyTest_test1(void)
 {
  // Add your code for command ROYMyTest._test1 here
  ads_point pt;
  ads_name ename;
  AcDbObjectId EntID;
  AcDbEntity *pEnt=NULL;
  if (acedEntSel(_T("\nSelect a line or arc:"),ename,pt)!=RTNORM
   || acdbGetObjectId(EntID,ename)!=Acad::eOk
   || acdbOpenAcDbEntity(pEnt,EntID,AcDb::kForRead)!=Acad::eOk)
   return;
  if (!(pEnt->isKindOf(AcDbLine::desc()) || pEnt->isKindOf(AcDbArc::desc())))
  {
   pEnt->close();
   return;
  }
  AcDbLine *pLine;
  AcDbArc *pArc;
  AcGePoint3d ptStart,ptEnd;
  double dBugle,startAngle,endAngle,dAngle;
  if (pEnt->isKindOf(AcDbLine::desc()))
  {
   pLine=AcDbLine::cast(pEnt);
   if (pLine!=NULL)
   {
    ptStart=pLine->startPoint();
    ptEnd=pLine->endPoint();
    dBugle=0;
   }
  }
  else
  {
   pArc=AcDbArc::cast(pEnt);
   if (pArc!=NULL)
   {
    pArc->getStartPoint(ptStart);
    pArc->getEndPoint(ptEnd);
    startAngle=pArc->startAngle();
    endAngle=pArc->endAngle();
    if (endAngle<startAngle)
     endAngle+=8*atan(1.0);
    dAngle=endAngle-startAngle;
    dBugle=tan(dAngle/4);
   }
  }
  if (pEnt->upgradeOpen()!=Acad::eOk)
  {
   pEnt->close();
   return;
  }
  pEnt->erase();
  pEnt->close();

  AcDbPolyline *pPLine;
  pPLine=new AcDbPolyline(2);
  pPLine->addVertexAt(0,asPnt2d(asDblArray(ptStart)),dBugle);
  pPLine->addVertexAt(1,asPnt2d(asDblArray(ptEnd)));
  ostToMS((AcDbEntity*)pPLine);
  pPLine->close();
 }

rongyifei

以上代码仅供参考！

netspyboy

首先感谢

rongyifei

无私的把代码分享出来

netspyboy

困惑我很久以致我自己的代码不能成功转换的就是少了：endAngle+=8*atan(1.0)这句，导致dBugle不对。

非常感谢。