public static GeomCoordinate GetNearestPoint(CoordinateRectangle line, GeomCoordinate pt)
{
const double r2D = 180 / Math.PI; // Constant for converting radians to degrees
var a = GetLength(line.LeftTop, line.RightBottom);
if (a <= 0)
{
return(pt);
}
var b = GetLength(line.LeftTop, pt);
var c = GetLength(line.RightBottom, pt);
var enB = Math.Acos((Math.Pow(a, 2) + Math.Pow(b, 2) - Math.Pow(c, 2)) / (2 * a * b)) * r2D;
if (enB >= 90)
{
return(pt);
}
var enC = Math.Acos((Math.Pow(a, 2) + Math.Pow(c, 2) - Math.Pow(b, 2)) / (2 * a * c)) * r2D;
if (enC >= 90)
{
return(pt);
}
var x = ((line.Right - line.Left) * (line.Bottom - line.Top) * (pt.Latitude - line.Top) +
line.Left * Math.Pow(line.Bottom - line.Top, 2) + pt.Longitude * Math.Pow(line.Right - line.Left, 2)) /
(Math.Pow(line.Bottom - line.Top, 2) + Math.Pow(line.Right - line.Left, 2));
var y = (line.Bottom - line.Top) * (x - line.Left) / (line.Right - line.Left) + line.Top;
return(new GeomCoordinate(x, y));
}
public IntersectResult LineContains(CoordinateRectangle line)
{
var iLeftTop = PointContains(line.LeftTop) != IntersectResult.None;
var iRightBottom = PointContains(line.RightBottom) != IntersectResult.None;
if (iLeftTop && iRightBottom)
{
return(IntersectResult.Contains);
}
if (iLeftTop || iRightBottom)
{
return(IntersectResult.Intersects);
}
if (MapUtilities.CheckLinesIntersection(new CoordinateRectangle(Left, Top, Right, Top), line))
{
return(IntersectResult.Intersects);
}
if (MapUtilities.CheckLinesIntersection(new CoordinateRectangle(Right, Top, Right, Bottom), line))
{
return(IntersectResult.Intersects);
}
if (MapUtilities.CheckLinesIntersection(new CoordinateRectangle(Left, Bottom, Right, Bottom), line))
{
return(IntersectResult.Intersects);
}
if (MapUtilities.CheckLinesIntersection(new CoordinateRectangle(Left, Top, Left, Bottom), line))
{
return(IntersectResult.Intersects);
}
return(IntersectResult.None);
}
/// <summary>
/// Approximate distance from point to line segment
/// Transmitted latitude / longitude in degrees and hundredths
/// </summary>
///
public static double GetDistance(CoordinateRectangle line, GeomCoordinate pt)
{
const double r2D = 180 / Math.PI; // Constant for converting radians to degrees
var a = GetLength(line.LeftTop, line.RightBottom);
var b = GetLength(line.LeftTop, pt);
var c = GetLength(line.RightBottom, pt);
if (a <= 0)
{
return((b + c) / 2);
}
var enB = Math.Acos((Math.Pow(a, 2) + Math.Pow(b, 2) - Math.Pow(c, 2)) / (2 * a * b)) * r2D;
if (enB >= 90)
{
return(b);
}
var enC = Math.Acos((Math.Pow(a, 2) + Math.Pow(c, 2) - Math.Pow(b, 2)) / (2 * a * c)) * r2D;
if (enC >= 90)
{
return(c);
}
var s = (a + b + c) / 2;
var ar = Math.Sqrt(s * (s - a) * (s - b) * (s - c));
return(ar * 2 / a);
}
public IntersectResult RectangleContains(CoordinateRectangle rectangle)
{
var iLeftTop = PointContains(rectangle.LeftTop) != IntersectResult.None;
var iRightBottom = PointContains(rectangle.RightBottom) != IntersectResult.None;
if (iLeftTop && iRightBottom)
{
return(IntersectResult.Contains);
}
if (iLeftTop || iRightBottom)
{
return(IntersectResult.Intersects);
}
if (PointContains(rectangle.LeftBottom) != IntersectResult.None)
{
return(IntersectResult.Intersects);
}
if (PointContains(rectangle.RightTop) != IntersectResult.None)
{
return(IntersectResult.Intersects);
}
iLeftTop = rectangle.PointContains(LeftTop) != IntersectResult.None;
iRightBottom = rectangle.PointContains(RightBottom) != IntersectResult.None;
if (iLeftTop && iRightBottom)
{
return(IntersectResult.Supersets);
}
if (iLeftTop || iRightBottom)
{
return(IntersectResult.Intersects);
}
if (rectangle.PointContains(LeftBottom) != IntersectResult.None)
{
return(IntersectResult.Intersects);
}
if (rectangle.PointContains(RightTop) != IntersectResult.None)
{
return(IntersectResult.Intersects);
}
if (MapUtilities.CheckLinesIntersection(new CoordinateRectangle(Left, Top, Left, Bottom),
new CoordinateRectangle(rectangle.Left, rectangle.Top, rectangle.Right, rectangle.Top)))
{
return(IntersectResult.Intersects);
}
if (MapUtilities.CheckLinesIntersection(new CoordinateRectangle(Left, Top, Right, Top),
new CoordinateRectangle(rectangle.Left, rectangle.Top, rectangle.Left, rectangle.Bottom)))
{
return(IntersectResult.Intersects);
}
return(IntersectResult.None);
}
public bool IncludeTo(CoordinateRectangle rect)
{
for (var i = 0; i < Coordinates.Count; i++)
{
if (rect.PointContains(Coordinates[i]) != IntersectResult.Contains)
{
return(false);
}
}
return(true);
}
public bool Add(GeomCoordinate coordinate)
{
if (Count > 2)
{
var line1 = new CoordinateRectangle(First, coordinate);
var line2 = new CoordinateRectangle(Last, coordinate);
for (var i = 0; i < Count - 1; i++)
{
if (MapUtilities.CheckLinesIntersection(this[i], line1) ||
MapUtilities.CheckLinesIntersection(this[i], line2))
{
return(false);
}
}
}
Coordinates.Add(coordinate);
return(true);
}
public IntersectResult PoligonContains(CoordinateRectangle coordinate)
{
//to do
return(IntersectResult.None);
}
