///<summary> /// Computes the Euclidean distance (L2 metric) from a <see cref="Coordinate"/> to a <see cref="IGeometry"/>. ///</summary> /// <param name="geom">The geometry</param> /// <param name="pt">The Point</param> /// <param name="ptDist">The <c>PointPairDistance</c></param> public static void ComputeDistance(IGeometry geom, Coordinate pt, PointPairDistance ptDist) { if (geom is ILineString) { ComputeDistance((ILineString)geom, pt, ptDist); } else if (geom is IPolygon) { ComputeDistance((IPolygon)geom, pt, ptDist); } else if (geom is IGeometryCollection) { var gc = (IGeometryCollection)geom; for (var 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); } }
///<summary> /// Computes the Euclidean distance (L2 metric) from a <see cref="Coordinate"/> to a <see cref="Polygon"/>. ///</summary> /// <param name="poly">The <c>Polygon</c></param> /// <param name="pt">The Point</param> /// <param name="ptDist">The <c>PointPairDistance</c></param> public static void ComputeDistance(IPolygon poly, Coordinate pt, PointPairDistance ptDist) { ComputeDistance(poly.ExteriorRing, pt, ptDist); for (var i = 0; i < poly.NumInteriorRings; i++) { ComputeDistance(poly.GetInteriorRingN(i), pt, ptDist); } }
///<summary> /// Computes the Euclidean distance (L2 metric) from a <see cref="Coordinate"/> to a <see cref="ILineString"/>. ///</summary> /// <param name="line">The <c>LineString</c></param> /// <param name="pt">The Point</param> /// <param name="ptDist">The <c>PointPairDistance</c></param> public static void ComputeDistance(ILineString line, Coordinate pt, PointPairDistance ptDist) { var coords = line.Coordinates; var tempSegment = new LineSegment(); for (var 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); } }
private void ComputeOrientedDistance(IGeometry discreteGeom, IGeometry geom, PointPairDistance ptDist) { var distFilter = new MaxPointDistanceFilter(geom); discreteGeom.Apply(distFilter); ptDist.SetMaximum(distFilter.MaxPointDistance); if (_densifyFrac > 0) { var fracFilter = new MaxDensifiedByFractionDistanceFilter(geom, _densifyFrac); discreteGeom.Apply(fracFilter); ptDist.SetMaximum(fracFilter.MaxPointDistance); } }
public void SetMinimum(PointPairDistance ptDist) { SetMinimum(ptDist._pt[0], ptDist._pt[1]); }
///<summary> /// Computes the Euclidean distance (L2 metric) from a <see cref="Coordinate"/> to a <see cref="LineSegment"/>. ///</summary> /// <param name="segment">The <c>LineSegment</c></param> /// <param name="pt">The Point</param> /// <param name="ptDist">The <c>PointPairDistance</c></param> public static void ComputeDistance(LineSegment segment, Coordinate pt, PointPairDistance ptDist) { var closestPt = segment.ClosestPoint(pt); ptDist.SetMinimum(closestPt, pt); }