/// <summary>
/// Shift the <see cref="Direction4Diagonal"/> clockwise.
/// </summary>
/// <param name="direction">The <see cref="Direction4Diagonal"/> to shift.</param>
/// <param name="shiftBy">The number of times to shift.</param>
/// <returns>A <see cref="Direction4Diagonal"/> shifted by <paramref name="shiftBy"/> amount of times, starting from <paramref name="direction"/>.</returns>
public static Direction4Diagonal Shift(this Direction4Diagonal direction, int shiftBy)
{
var index = (int)direction;
index += shiftBy;
index %= DirectionEnumLength;
if (index < 0)
{
index += DirectionEnumLength;
}
return((Direction4Diagonal)index);
}
/// <summary>
/// Returns a unit <see cref="Vector3"/> on a horizontal plane, representing this <see cref="Direction4Diagonal"/>.
/// </summary>
/// <param name="direction">The input <see cref="Direction4Diagonal"/>.</param>
/// <returns>A unit <see cref="Vector3"/> representing <paramref name="direction"/>.</returns>
/// <exception cref="InvalidEnumArgumentException"><paramref name="direction"/> has an invalid value.</exception>
public static Vector3 AsVector3XZ(this Direction4Diagonal direction)
{
switch (direction)
{
case Direction4Diagonal.DownRight: return((Vector3.right + Vector3.back).normalized);
case Direction4Diagonal.DownLeft: return((Vector3.left + Vector3.back).normalized);
case Direction4Diagonal.UpLeft: return((Vector3.left + Vector3.forward).normalized);
case Direction4Diagonal.UpRight: return((Vector3.right + Vector3.forward).normalized);
default:
throw new InvalidEnumArgumentException(nameof(direction), (int)direction, typeof(Direction4Diagonal));
}
}
public static string GeographicName(this Direction4Diagonal direction4Diagonal)
{
switch (direction4Diagonal)
{
case Direction4Diagonal.UpRight:
return("North East");
case Direction4Diagonal.DownRight:
return("South East");
case Direction4Diagonal.DownLeft:
return("South West");
case Direction4Diagonal.UpLeft:
return("North West");
default:
return("");
}
}
public static float GetOuterCornerAngle(this Direction4Diagonal direction4Diagonal)
{
switch (direction4Diagonal)
{
case Direction4Diagonal.UpRight:
return(90);
case Direction4Diagonal.DownRight:
return(180);
case Direction4Diagonal.DownLeft:
return(270);
case Direction4Diagonal.UpLeft:
return(0);
default:
throw new ArgumentOutOfRangeException(nameof(direction4Diagonal), direction4Diagonal, null);
}
}
/// <summary>
/// Returns the opposite <see cref="Direction4Diagonal"/> of this <see cref="Direction4Diagonal"/>.
/// </summary>
/// <param name="direction">The <see cref="Direction4Diagonal"/> to invert.</param>
/// <returns>The opposite <see cref="Direction4Diagonal"/> of <paramref name="direction"></paramref>.</returns>
public static Direction4Diagonal Opposite(this Direction4Diagonal direction)
{
return(direction.Shift((DirectionEnumLength - 1) / 2));
}
