计算凸度

admin1

static void SplitPline(void)
{

  AcGePoint3d p1, p2;
  if (acedGetPoint(NULL,          _T("\nPick First point on Polyline: "),  asDblArray(p1)) == RTNORM &&
      acedGetPoint(asDblArray(p1),_T("\nPick Second point on Polyline: "), asDblArray(p2)) == RTNORM)
  {
    AcGeMatrix3d matUCS; acedGetCurrentUCS(matUCS);
    p1.transformBy(matUCS); p2.transformBy(matUCS);
    ads_name en; ads_point p;
    if (acedEntSel(_T("\nSelect polyline: "), en, p) != RTNORM) return;
    AcDbObjectId eid; acdbGetObjectId(eid,en);
    AcDbObjectPointer<AcDbPolyline> pPline(eid,AcDb::kForRead);
    if (pPline.openStatus() != Acad::eOk) return;
    AcGePoint3d p1n, p2n;
    if (pPline->getClosestPointTo(p1,p1n) != Acad::eOk) return;
    if (pPline->getClosestPointTo(p2,p2n) != Acad::eOk) return;
    double par1,par2;
    if (pPline->getParamAtPoint(p1n,par1) != Acad::eOk) return;
    if (pPline->getParamAtPoint(p2n,par2) != Acad::eOk) return;
    AcGeDoubleArray pars;
    pars.append(min(par1,par2)); pars.append(max(par1,par2));
    AcDbVoidPtrArray arr;
    if (pPline->getSplitCurves(pars,arr) != Acad::eOk) return;
    for (int i = 0; i < arr.length(); i++)
    {
      AcDbEntity *pEnt = static_cast<AcDbEntity *>(arr[i]);
      AcDbPolyline *pPlineSub = AcDbPolyline::cast(pEnt);
      if (pPlineSub) {
        pPlineSub->setClosed(true);
        pPlineSub->setBulgeAt(pPlineSub->numVerts()-1,0);
      }
      postToDwgAndClose(pEnt);
    }
  }
}