/// <summary>
/// Creates an identical polygon.
/// </summary>
/// <returns>A polygon.</returns>
/// <remarks>Functions as a deep clone.</remarks>
public Polygon2 Clone()
{
Contract.Ensures(Contract.Result <Polygon2>() != null);
var p = new Polygon2(Count);
foreach (var r in this)
{
p.Add(r.Clone());
}
return(p);
}
/// <summary>
/// Determines if this polygon occupies the same area as the <paramref name="other"/> polygon.
/// </summary>
/// <param name="other">The polygon to compare.</param>
/// <returns>True when the polygons are spatially equal.</returns>
public bool SpatiallyEqual(Polygon2 other)
{
if (ReferenceEquals(null, other))
{
return(false);
}
if (Equals(other))
{
return(true);
}
if (Count != other.Count)
{
return(false);
}
if (GetMbr() != other.GetMbr())
{
return(false);
}
var ringsToCheck = new LinkedList <Ring2>(other);
foreach (var ringA in this)
{
if (ringsToCheck.Count == 0)
{
return(false); // no rings left to check
}
var selected = ringsToCheck.FirstOrDefault(r => r.SpatiallyEqual(ringA));
if (null == selected)
{
return(false); // no match for this ring in A
}
ringsToCheck.Remove(selected);
}
return(true);
}
/// <summary>
/// Indicates whether the current object is equal to another object of the same type.
/// </summary>
/// <returns>
/// <c>true</c> if the current object is equal to the <paramref name="other"/> parameter; otherwise, <c>false</c>.
/// </returns>
/// <param name="other">An object to compare with this object.</param>
public bool Equals(Polygon2 other)
{
if (ReferenceEquals(null, other))
{
return(false);
}
if (ReferenceEquals(this, other))
{
return(true);
}
if (Count != other.Count)
{
return(false);
}
for (var i = 0; i < Count; i++)
{
if (!this[i].Equals(other[i]))
{
return(false);
}
}
return(true);
}