/// <summary>
/// Checks if point is in polygon (two checks with two rays).
/// </summary>
/// <returns><c>true</c>, if point is in polygon, <c>false</c> otherwise.</returns>
/// <param name="polygon">Polygon.</param>
/// <param name="CurrentPosition">Current position.</param>
public bool IsInPolygon(Polygon polygon, Location CurrentPosition)
{
LineEntity F1 = new LineEntity(polygon.Positions[0], polygon.Positions[1]);
LineEntity F2 = new LineEntity(polygon.Positions[1], polygon.Positions[2]);
LineEntity F3 = new LineEntity(polygon.Positions[2], polygon.Positions[3]);
LineEntity F4 = new LineEntity(polygon.Positions[3], polygon.Positions[0]);
// The end of first ray
Position B = new Position(CurrentPosition.Longitude + 34.282828, CurrentPosition.Latitude + 83.181772626);
// The end of second ray
Position C = new Position(CurrentPosition.Longitude + 23.2828828, CurrentPosition.Latitude + 12.001827);
LineEntity AB = new LineEntity(CurrentPosition, B);
LineEntity AC = new LineEntity(CurrentPosition, C);
int ABCounter = 0;
if (lineInteractor.IfIntersect(AB, F1))
{
ABCounter++;
}
if (lineInteractor.IfIntersect(AB, F2))
{
ABCounter++;
}
if (lineInteractor.IfIntersect(AB, F3))
{
ABCounter++;
}
if (lineInteractor.IfIntersect(AB, F4))
{
ABCounter++;
}
int ACCounter = 0;
if (lineInteractor.IfIntersect(AC, F1))
{
ACCounter++;
}
if (lineInteractor.IfIntersect(AC, F2))
{
ACCounter++;
}
if (lineInteractor.IfIntersect(AC, F3))
{
ACCounter++;
}
if (lineInteractor.IfIntersect(AC, F4))
{
ACCounter++;
}
if (ABCounter % 2 == 1 && ACCounter % 2 == 1)
{
return(true);
}
return(false);
}
/// <summary>
/// Checks the intersect of two lines.
/// </summary>
/// <returns><c>true</c>, if intersect was ifed, <c>false</c> otherwise.</returns>
/// <param name="Left">First line to check.</param>
/// <param name="Right">Second line to check.</param>
public bool IfIntersect(LineEntity Left, LineEntity Right)
{
Position A = Left.X;
Position B = Left.Y;
Position C = Right.X;
Position D = Right.Y;
return(CheckIntersect1(A.Longitude, B.Longitude, C.Longitude, D.Longitude) &&
CheckIntersect1(A.Latitude, B.Latitude, C.Latitude, D.Latitude) &&
ReturnArea(A, B, C) * ReturnArea(A, B, D) <= 0 &&
ReturnArea(C, D, A) * ReturnArea(C, D, B) <= 0);
}
