/// <summary>
/// Create a Polyline from two Points
/// </summary>
/// <param name="pointFrom">Start point</param>
/// <param name="pointTo">End point</param>
/// <returns>Esri poliline</returns>
public static IPolyline CreatePolylineFromPoints(IPoint pointFrom, IPoint pointTo)
{
if (pointFrom == null || pointTo == null)
{
return(null);
}
WKSPoint[] segmentWksPoints = new WKSPoint[2];
segmentWksPoints[0].X = pointFrom.X;
segmentWksPoints[0].Y = pointFrom.Y;
segmentWksPoints[1].X = pointTo.X;
segmentWksPoints[1].Y = pointTo.Y;
IPointCollection4 trackLine = new PolylineClass();
IGeometryBridge2 m_geometryBridge = new GeometryEnvironmentClass();
m_geometryBridge.AddWKSPoints(trackLine, ref segmentWksPoints);
var result = trackLine as IPolyline;
if (pointFrom.SpatialReference != null && pointTo.SpatialReference != null && pointFrom.SpatialReference == pointTo.SpatialReference)
{
result.SpatialReference = pointFrom.SpatialReference;
}
return(result);
}
private List <IGeometry> splitGeometry(IGeometry geo, bool mergePolys)
{
IGeometry geoM = null;
if (mergePolys)
{
geoM = mergeSmallGeos(geo);
}
else
{
geoM = geo;
}
List <IGeometry> geoLst = new List <IGeometry>();
IPolygon4 poly4 = (IPolygon4)geoM;
IGeometryCollection geoColl = (IGeometryCollection)poly4.ConnectedComponentBag;
for (int i = 0; i < geoColl.GeometryCount; i++)
{
IGeometry geo2 = geoColl.get_Geometry(i);
IEnvelope env = geo2.Envelope;
double xmax = env.XMax;
double xmin = env.XMin;
double ymax = env.YMax;
double ymin = env.YMin;
double xRange = xmax - xmin;
double yRange = ymax - ymin;
double nMinX, nMinY, nMaxX, nMaxY;
if (xRange > yRange)
{
nMinY = ymin - 1;
nMaxY = ymax + 1;
nMinX = xmin + (xRange / 2);
nMaxX = nMinX;
}
else
{
nMinX = xmin - 1;
nMaxX = xmax + 1;
nMinY = ymin + (yRange / 2);
nMaxY = nMinY;
}
WKSPoint[] wksPoint = new WKSPoint[2];
IPointCollection4 pointCollection4 = new PolylineClass();
wksPoint[0].X = nMinX;
wksPoint[0].Y = nMinY;
wksPoint[1].X = nMaxX;
wksPoint[1].Y = nMaxY;
IGeometryBridge2 geometryBridge2 = new GeometryEnvironmentClass();
geometryBridge2.AddWKSPoints(pointCollection4, ref wksPoint);
IPolyline polyline = pointCollection4 as ESRI.ArcGIS.Geometry.IPolyline;
polyline.SpatialReference = geo2.SpatialReference;
ITopologicalOperator4 tp = (ITopologicalOperator4)geo2;
IGeometry geoL = null;
IGeometry geoR = null;
try
{
tp.Cut(polyline, out geoL, out geoR);
if (((IArea)geoL).Area > maxarea)
{
geoLst.AddRange(splitGeometry(geoL, false));
}
else
{
geoLst.Add(geoL);
}
if (((IArea)geoR).Area > maxarea)
{
geoLst.AddRange(splitGeometry(geoR, false));
}
else
{
geoLst.Add(geoR);
}
}
catch (Exception e)
{
geoLst.Add(geo2);
Console.WriteLine(e.ToString());
}
}
return(geoLst);
}
private List<IGeometry> splitGeometry(IGeometry geo,bool mergePolys)
{
IGeometry geoM = null;
if (mergePolys)
{
geoM = mergeSmallGeos(geo);
}
else
{
geoM = geo;
}
List<IGeometry> geoLst = new List<IGeometry>();
IPolygon4 poly4 = (IPolygon4)geoM;
IGeometryCollection geoColl = (IGeometryCollection)poly4.ConnectedComponentBag;
for (int i = 0; i < geoColl.GeometryCount; i++)
{
IGeometry geo2 = geoColl.get_Geometry(i);
IEnvelope env = geo2.Envelope;
double xmax = env.XMax;
double xmin = env.XMin;
double ymax = env.YMax;
double ymin = env.YMin;
double xRange = xmax - xmin;
double yRange = ymax - ymin;
double nMinX, nMinY, nMaxX, nMaxY;
if (xRange > yRange)
{
nMinY = ymin - 1;
nMaxY = ymax + 1;
nMinX = xmin + (xRange / 2);
nMaxX = nMinX;
}
else
{
nMinX = xmin - 1;
nMaxX = xmax + 1;
nMinY = ymin + (yRange / 2);
nMaxY = nMinY;
}
WKSPoint[] wksPoint = new WKSPoint[2];
IPointCollection4 pointCollection4 = new PolylineClass();
wksPoint[0].X = nMinX;
wksPoint[0].Y = nMinY;
wksPoint[1].X = nMaxX;
wksPoint[1].Y = nMaxY;
IGeometryBridge2 geometryBridge2 = new GeometryEnvironmentClass();
geometryBridge2.AddWKSPoints(pointCollection4, ref wksPoint);
IPolyline polyline = pointCollection4 as ESRI.ArcGIS.Geometry.IPolyline;
polyline.SpatialReference = geo2.SpatialReference;
ITopologicalOperator4 tp = (ITopologicalOperator4)geo2;
IGeometry geoL = null;
IGeometry geoR = null;
try
{
tp.Cut(polyline, out geoL, out geoR);
if (((IArea)geoL).Area > maxarea)
{
geoLst.AddRange(splitGeometry(geoL,false));
}
else
{
geoLst.Add(geoL);
}
if (((IArea)geoR).Area > maxarea)
{
geoLst.AddRange(splitGeometry(geoR,false));
}
else
{
geoLst.Add(geoR);
}
}
catch (Exception e)
{
geoLst.Add(geo2);
Console.WriteLine(e.ToString());
}
}
return geoLst;
}
