/**
* See {@link SpatialContext#SpatialContext(com.spatial4j.core.distance.DistanceUnits, com.spatial4j.core.distance.DistanceCalculator, com.spatial4j.core.shape.Rectangle)}.
*
* @param geometryFactory optional
*/
public NtsSpatialContext(GeometryFactory geometryFactory, DistanceUnits units, DistanceCalculator calculator, Rectangle worldBounds)
: base(units, calculator, worldBounds)
{
this.geometryFactory = geometryFactory ?? new GeometryFactory();
}
protected void InitUnits()
{
String unitsStr;
if (!Args.TryGetValue("units", out unitsStr) || unitsStr == null)
Units = DistanceUnits.KILOMETERS;
else
Units = DistanceUnits.FindDistanceUnit(unitsStr);
}
public NtsSpatialContext(DistanceUnits units)
: base(units, null, null)
{
geometryFactory = new GeometryFactory();
}
public SpatialContext(DistanceUnits units)
{
Init(units, null, null);
}
/// <summary>
///
/// </summary>
/// <param name="units">Required; and establishes geo vs cartesian.</param>
/// <param name="calculator">Optional; defaults to Haversine or cartesian depending on units.</param>
/// <param name="worldBounds">Optional; defaults to GEO_WORLDBOUNDS or MAX_WORLDBOUNDS depending on units.</param>
public SpatialContext(DistanceUnits units, DistanceCalculator calculator, Rectangle worldBounds)
{
Init(units, calculator, worldBounds);
}
protected void Init(DistanceUnits units, DistanceCalculator calculator, Rectangle worldBounds)
{
if (units == null)
throw new ArgumentException("units can't be null", "units");
this.units = units;
if (calculator == null)
{
calculator = IsGeo()
? (DistanceCalculator)new GeodesicSphereDistCalc.Haversine(units.EarthRadius())
: new CartesianDistCalc();
}
this.calculator = calculator;
if (worldBounds == null)
{
worldBounds = IsGeo() ? GEO_WORLDBOUNDS : MAX_WORLDBOUNDS;
}
else
{
if (IsGeo())
Debug.Assert(new RectangleImpl(worldBounds).Equals(GEO_WORLDBOUNDS));
if (worldBounds.GetCrossesDateLine())
throw new ArgumentException("worldBounds shouldn't cross dateline: " + worldBounds, "worldBounds");
}
//copy so we can ensure we have the right implementation
worldBounds = MakeRect(worldBounds.GetMinX(), worldBounds.GetMaxX(), worldBounds.GetMinY(), worldBounds.GetMaxY());
this.worldBounds = worldBounds;
shapeReadWriter = MakeShapeReadWriter();
this.maxCircleDistance = IsGeo() ? calculator.DegreesToDistance(180) : (double?)null;
}
/// <summary>
/// Converts the given distance in given DistanceUnit, to a distance in the unit represented by {@code this}
/// </summary>
/// <param name="distance">Distance to convert</param>
/// <param name="from">Unit to convert the distance from</param>
/// <returns>Given distance converted to the distance in the given unit</returns>
public double Convert(double distance, DistanceUnits from)
{
if (from == this)
{
return distance;
}
if (this == CARTESIAN || from == CARTESIAN)
{
throw new InvalidOperationException("Can't convert cartesian distances: " + from + " -> " + this);
}
return (this == MILES) ? distance * DistanceUtils.KM_TO_MILES : distance * DistanceUtils.MILES_TO_KM;
}
