AE determines if the point is within the face

1         /// <summary>2         ///gets the polygon based on the ID of the polygon feature and determines whether the point is within the polygon3         /// </summary>4         /// <param name= "point" >to judge the point, the beginning of the Ray</param>5         /// <param name= "ID" >ID of the polygon</param>6         /// <param name= "Pfeaturelayer" >layer where polygon features are located</param>7         /// <returns></returns>8         Private BOOLPointisinpolygon (IPoint Point,intID, Ifeaturelayer pfeaturelayer)9         {TenIfeatureclass Pfeatureclass =Pfeaturelayer.featureclass; OneIpolygon Ppolygon = (pfeatureclass.getfeature (ID)). Shape asIpolygon; A             //comparison to the maximum minimum xy value of a polygon -Ienvelope Penvelope =NewEnvelopeclass (); -Penvelope =Ppolygon.envelope; the             if(Point. x<penvelope.xmin| | Point. x>penvelope.xmax| | Point. y<penvelope.ymin| | Point. Y>Penvelope.ymax) -                 return false; -             //If, in this range, the left is the ray, determine the number of intersections according to the topology of the line and Polygon -             Try { +IPoint Topoint =NewPointclass (); -Topoint.putcoords (Getxminvalue (Ppolygon)-20.00000000, point. Y); +Ipolyline PLine =NewPolylineclass ();//define Ray APline.topoint =Topoint; atPline.frompoint =Point ; -  -Itopologicaloperator Ptopo = Ppolygon asItopologicaloperator; -Igeometrycollection Pgeocol = Ptopo.intersect ((igeometry) pLine, esrigeometrydimension.esrigeometry0dimension) asigeometrycollection; -Ipointcollection Ppointcol = Pgeocol asipointcollection; -                 if((ppointcol.pointcount)%2==0) in                 { -                     return false; to                 } +                 Else -                 { the                     return true; *                 } $                 Panax Notoginseng             } -             Catch(Exception ee) the             { + MessageBox.Show (EE. Message); A                 return false; the             } +         } -         /// <summary> $         ///gets the X minimum value of the polygon $         /// </summary> -         /// <param name= "Ppolygon" ></param> -         /// <returns></returns> the         Private DoubleGetxminvalue (Ipolygon ppolygon) -         {WuyiIpointcollection ppointcollection = Ppolygon asipointcollection; the             intn =Ppointcollection.pointcount; -             Double[] Coordx =New Double[n]; Wu              for(inti =0; I < n; i++) -             { AboutIPoint point =Ppointcollection.get_point (i); $Coordx[i] =Point . X; -             } - System.Array.Sort (COORDX); -             returncoordx[0]; A}

AE Determines whether the point is inside the polygon