/// <summary>
///
/// </summary>
/// <returns></returns>
protected override Envelope ComputeEnvelopeInternal()
{
if (IsEmpty)
{
return(new Envelope());
}
//Convert to array, then access array directly, to avoid the function-call overhead
//of calling Getter millions of times. ToArray may be inefficient for
//non-BasicCoordinateSequence CoordinateSequences. [Jon Aquino]
var coordinates = _points.ToCoordinateArray();
double minx = coordinates[0].X;
double miny = coordinates[0].Y;
double maxx = coordinates[0].X;
double maxy = coordinates[0].Y;
for (int i = 1; i < coordinates.Length; i++)
{
minx = minx < coordinates[i].X ? minx : coordinates[i].X;
maxx = maxx > coordinates[i].X ? maxx : coordinates[i].X;
miny = miny < coordinates[i].Y ? miny : coordinates[i].Y;
maxy = maxy > coordinates[i].Y ? maxy : coordinates[i].Y;
}
return(new Envelope(minx, maxx, miny, maxy));
}
