直线、圆弧如何转换成多义线

netspyboy · 发表于 2010-6-21 11:27:00

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 · 发表于 2010-6-21 20:41:00

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 (endAngleupgradeOpen()!=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)));
&nbspostToMS((AcDbEntity*)pPLine);
  pPLine->close();
}