public static void ComputeDistance(Geometry geom, Coordinate pt, PointPairDistance ptDist) { if (geom is LineString) { ComputeDistance((LineString)geom, pt, ptDist); } else if (geom is Polygon) { ComputeDistance((Polygon)geom, pt, ptDist); } else if (geom is GeometryCollection) { var gc = (GeometryCollection)geom; for (int i = 0; i < gc.NumGeometries; i++) { var g = gc.GetGeometryN(i); ComputeDistance(g, pt, ptDist); } } else { // assume geom is Point ptDist.SetMinimum(geom.Coordinate, pt); } }
public static void ComputeDistance(Polygon poly, Coordinate pt, PointPairDistance ptDist) { ComputeDistance(poly.ExteriorRing, pt, ptDist); for (int i = 0; i < poly.NumInteriorRings; i++) { ComputeDistance(poly.GetInteriorRingN(i), pt, ptDist); } }
public static void ComputeDistance(LineString line, Coordinate pt, PointPairDistance ptDist) { var coords = line.Coordinates; var tempSegment = new LineSegment(); for (int i = 0; i < coords.Length - 1; i++) { tempSegment.SetCoordinates(coords[i], coords[i + 1]); // this is somewhat inefficient - could do better var closestPt = tempSegment.ClosestPoint(pt); ptDist.SetMinimum(closestPt, pt); } }
public void SetMinimum(PointPairDistance ptDist) { SetMinimum(ptDist._pt[0], ptDist._pt[1]); }
public static void ComputeDistance(LineSegment segment, Coordinate pt, PointPairDistance ptDist) { var closestPt = segment.ClosestPoint(pt); ptDist.SetMinimum(closestPt, pt); }