private static string ToString(Point p)
{
if (p == null)
{
return("");
}
if (p.IsEmpty())
{
return("Empty");
}
return(string.Format("({0}, {1})", p.X, p.Y));
}
/// <summary>
/// Transforms from world coordinate system (WCS) to image coordinates
/// NOTE: This method DOES NOT take the MapTransform property into account (use SharpMap.Map.MapToWorld instead)
/// </summary>
/// <param name="p">Point in WCS</param>
/// <param name="map">Map reference</param>
/// <returns>Point in image coordinates</returns>
public static PointF WorldtoMap(Point p, Map map)
{
//if (map.MapTransform != null && !map.MapTransform.IsIdentity)
// map.MapTransform.TransformPoints(new System.Drawing.PointF[] { p });
PointF result = new System.Drawing.Point();
if (p.IsEmpty() == true)
return PointF.Empty;
double height = (map.Zoom * map.Size.Height) / map.Size.Width;
double left = map.Center.X - map.Zoom * 0.5;
double top = map.Center.Y + height * 0.5 * map.PixelAspectRatio;
result.X = (float)((p.X - left) / map.PixelWidth);
result.Y = (float)((top - p.Y) / map.PixelHeight);
if (double.IsNaN(result.X) || double.IsNaN(result.Y))
result = PointF.Empty;
return result;
}
/// <summary>
/// Checks whether min values are actually smaller than max values and in that case swaps them.
/// </summary>
/// <returns>true if the bounding was changed</returns>
public bool CheckMinMax()
{
bool wasSwapped = false;
if (!_min.IsEmpty() && !_max.IsEmpty())
{
if (_min.X > _max.X)
{
double tmp = _min.X;
_min.X = _max.X;
_max.X = tmp;
wasSwapped = true;
}
if (_min.Y > _max.Y)
{
double tmp = _min.Y;
_min.Y = _max.Y;
_max.Y = tmp;
wasSwapped = true;
}
}
return(wasSwapped);
}
/// <summary>
/// Transforms from world coordinate system (WCS) to image coordinates
/// NOTE: This method DOES NOT take the MapTransform property into account (use SharpMap.Map.MapToWorld instead)
/// </summary>
/// <param name="p">Point in WCS</param>
/// <param name="map">Map reference</param>
/// <returns>Point in image coordinates</returns>
public static PointF WorldtoMap(Point p, Map map)
{
//if (map.MapTransform != null && !map.MapTransform.IsIdentity)
// map.MapTransform.TransformPoints(new System.Drawing.PointF[] { p });
PointF result = new System.Drawing.Point();
if (p.IsEmpty() == true)
{
return(PointF.Empty);
}
double height = (map.Zoom * map.Size.Height) / map.Size.Width;
double left = map.Center.X - map.Zoom * 0.5;
double top = map.Center.Y + height * 0.5 * map.PixelAspectRatio;
result.X = (float)((p.X - left) / map.PixelWidth);
result.Y = (float)((top - p.Y) / map.PixelHeight);
if (double.IsNaN(result.X) || double.IsNaN(result.Y))
{
result = PointF.Empty;
}
return(result);
}
