private static Coordinate[] Reproject(this Coordinate[] coordinates, ProjectionInfo source, ProjectionInfo target)
{
if (target.Transform == null)
{
return(coordinates);
}
var xy = new double[coordinates.Length * 2];
var z = new double[coordinates.Length];
var j = 0;
for (var i = 0; i < coordinates.Length; i++)
{
Coordinate c = coordinates[i];
xy[j] = c.X;
xy[j + 1] = c.Y;
j = j + 2;
z[i] = double.IsNaN(c.Z) ? 0 : c.Z;
}
DotSpatialReproject.ReprojectPoints(xy, z, source, target, 0, coordinates.Length);
var result = new List <Coordinate>(coordinates.Length);
j = 0;
for (var i = 0; i < coordinates.Length; i++)
{
result.Add(new Coordinate(xy[j++], xy[j++]));
}
return(result.ToArray());
}
/// <summary>
/// Reprojects a <see cref="Extent"/>.
/// </summary>
/// <param name="extent">The object to be reprojected.</param>
/// <param name="source">The coordinate system corresponding to <paramref name="extent"/>.</param>
/// <param name="target">The target coordinate system.</param>
/// <returns>The reprojected <see cref="Extent"/>.</returns>
/// <exception cref="ArgumentNullException">Thrown when any input argument is <c>null</c>.</exception>
public static Extent Reproject(this Extent extent, ProjectionInfo source, ProjectionInfo target)
{
if (extent == null)
{
throw new ArgumentNullException(nameof(extent));
}
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (target == null)
{
throw new ArgumentNullException(nameof(target));
}
if (target.Transform == null)
{
return(extent);
}
double[] xy = ToSequence(extent);
DotSpatialReproject.ReprojectPoints(xy, null, source, target, 0, xy.Length / 2);
return(ToExtent(xy));
}
private IEnumerable <Tuple <Point, Point> > GetValidPoints(int y, int offsetY, int x1, int x2,
WorldFile sourceReference, Size sourceTileSize)
{
int len = x2 - x1;
var xy = new double[len * 2];
var i = 0;
for (int x = x1; x < x2; x++)
{
Coordinate c = mapArgs.PixelToProj(new Point(x, y));
xy[i] = c.X;
xy[i + 1] = c.Y;
i = i + 2;
}
DotSpatialReproject.ReprojectPoints(xy, null, target, source, 0, len);
i = 0;
y -= offsetY;
for (var x = 0; x < len; x++)
{
var coord = new Coordinate(xy[i++], xy[i++]);
Point sourcePixelLocation = sourceReference.ToScreenCoordinates(coord);
if (IsSourcePointInsideArea(sourceTileSize, sourcePixelLocation))
{
yield return(Tuple.Create(sourcePixelLocation, new Point(x, y)));
}
}
}
