NDBGJK5.0/Kingo.Plugins/Kingo.Plugin.MapView/Commands/TraceTool/PointEx.cs

using ESRI.ArcGIS.Geometry;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace KGIS.PlatformPlugin.Commands.Tools.TraceTool
{
    public static class PointEx
    {
        public static bool IsSamePoint(this IPoint pPoint, IPoint pPointCompare, double dTolerance = 0.001)
        {
            if (pPoint != null && pPointCompare != null)
            {
                IProximityOperator proximityOperator = pPoint as IProximityOperator;
                double num = proximityOperator.ReturnDistance(pPointCompare);
                return num <= 0.001;
            }
            return false;
        }
        public static bool IsOnLine(this IPoint pPoint, System.Collections.Generic.List<IPolyline> listLines)
        {
            if (pPoint != null && listLines != null && listLines.Count >= 1)
            {
                int count = listLines.Count;
                for (int i = 0; i < count; i++)
                {
                    IRelationalOperator relationalOperator = listLines[i] as IRelationalOperator;
                    if (relationalOperator != null && (relationalOperator.Contains(pPoint) || relationalOperator.Touches(pPoint)))
                    {
                        return true;
                    }
                }
                return false;
            }
            return false;
        }
        public static bool IsOnLine(this IPoint pPoint, IPolyline pPolyline)
        {
            if (pPoint != null && pPolyline != null)
            {
                IRelationalOperator relationalOperator = pPolyline as IRelationalOperator;
                return relationalOperator != null && (relationalOperator.Contains(pPoint) || relationalOperator.Touches(pPoint));
            }
            return false;
        }
        public static bool IsOnRing(this IPoint pPoint, IPolygon pPolygon)
        {
            if (pPoint != null && pPolygon != null)
            {
                ITopologicalOperator topologicalOperator = pPolygon as ITopologicalOperator;
                IGeometry boundary = topologicalOperator.Boundary;
                IRelationalOperator relationalOperator = boundary as IRelationalOperator;
                return relationalOperator != null && (relationalOperator.Contains(pPoint) || relationalOperator.Touches(pPoint));
            }
            return false;
        }
        public static bool IsInGeometry(this IPoint pPoint, IGeometry pGeometry)
        {
            if (pPoint != null && pGeometry != null)
            {
                IRelationalOperator relationalOperator = pGeometry as IRelationalOperator;
                return relationalOperator != null && (relationalOperator.Contains(pPoint) || relationalOperator.Touches(pPoint));
            }
            return false;
        }
        public static IPoint[] Explode(this IMultipoint iMultiPoint)
        {
            IPoint[] array = null;
            IPointCollection pointCollection = iMultiPoint as IPointCollection;
            int pointCount = pointCollection.PointCount;
            if (pointCount != 1)
            {
                if (pointCount > 1)
                {
                    array = new IPoint[pointCount];
                    for (int i = 0; i < pointCount; i++)
                    {
                        array[i] = new PointClass();
                        IPoint point = pointCollection.get_Point(i);
                        array[i].X = point.X;
                        array[i].Y = point.Y;
                    }
                }
                return array;
            }
            return new IPoint[]
            {
                iMultiPoint as IPoint
            };
        }
    }
}