ObjectARX PEnt->getOsnapPoin()扑捉函数的应用

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[code]static void ahlzlARX_test(void)
{
// Add your code for command ahlzlARX._test here
ads_name ent;
AcGePoint3d pickPt(0, 0, 0);
if(acedEntSel(_T("\n请选择圆、圆弧或椭圆对象："), ent,
  asDblArray(pickPt)) != RTNORM)
{
  return;
}
AcDbObjectId entId;
acdbGetObjectId(entId, ent);
AcDbEntity *pEnt;
acdbOpenAcDbEntity(pEnt, entId, AcDb::kForWrite);
pEnt->close();
AcGePoint3dArray snapPts;
AcDbIntArray geomIds;
pEnt->getOsnapPoints(AcDb::kOsModeCen, 0, pickPt, pickPt,
  AcGeMatrix3d::kIdentity, snapPts, geomIds);
for(int i = 0; i < snapPts.length(); i++)
{
  acutPrintf(_T("\n您点取的点是: %.4f, %.4f, %.4f"), pickPt.x,
   pickPt.y, pickPt.z );
  acutPrintf(_T("\n您捕捉到的点是: %.4f, %.4f, %.4f"), snapPts.x,
   snapPts.y, snapPts.z );
}
}
[/code]