private static IQuantity CalculateAngular(this IQuantity dimensionless, IPlanarAngle desiredUnit,
Func <double, double> trigonometry)
{
dimensionless.VerifyDimensionless();
var radian = SiTheta.Radian;
desiredUnit = desiredUnit ?? radian;
IQuantity result = new Quantity(trigonometry(dimensionless.Value), radian);
if (desiredUnit is SiTheta)
{
return(result);
}
return(result.ConvertTo(desiredUnit));
}
/// <summary>
/// Returns the angle whose tangent is the quotient of two specified numbers.
/// </summary>
/// <param name="x">The x coordinate of a point.</param>
/// <param name="y">The y coordinate of a point.</param>
/// <param name="desiredUnit"></param>
/// <returns></returns>
/// <a href="!:http://msdn.microsoft.com/en-us/library/system.math.atan2.aspx" />
public static IQuantity Atan2(this IQuantity x, IQuantity y, IPlanarAngle desiredUnit = null)
{
return CalculateAngular(x, y, desiredUnit, Math.Atan2);
}
/// <summary>
/// Returns the angle whose tangent is the specified number.
/// </summary>
/// <param name="d">A quantity representing a tangent.</param>
/// <param name="desiredUnit"></param>
/// <returns></returns>
/// <a href="!:http://msdn.microsoft.com/en-us/library/system.math.atan.aspx" />
public static IQuantity Atan(this IQuantity d, IPlanarAngle desiredUnit = null)
{
return CalculateAngular(d, desiredUnit, Math.Atan);
}
private static IQuantity CalculateAngular(IQuantity x, IQuantity y, IPlanarAngle desiredUnit,
Func<double, double, double> trigonometry)
{
//TODO: just dimensionless?
x.VerifyDimensionless();
y.VerifyDimensionless();
var radian = SiTheta.Radian;
desiredUnit = desiredUnit ?? radian;
IQuantity result = new Quantity(trigonometry(x.Value, y.Value), radian);
if (desiredUnit is SiTheta) return result;
return result.ConvertTo(desiredUnit);
}
/// <summary>
/// Returns the angle whose tangent is the quotient of two specified numbers.
/// </summary>
/// <param name="x">The x coordinate of a point.</param>
/// <param name="y">The y coordinate of a point.</param>
/// <param name="desiredUnit"></param>
/// <returns></returns>
/// <a href="!:http://msdn.microsoft.com/en-us/library/system.math.atan2.aspx" />
public static IQuantity Atan2(this IQuantity x, IQuantity y, IPlanarAngle desiredUnit = null)
{
return(CalculateAngular(x, y, desiredUnit, Math.Atan2));
}
/// <summary>
/// Returns the angle whose tangent is the specified number.
/// </summary>
/// <param name="d">A quantity representing a tangent.</param>
/// <param name="desiredUnit"></param>
/// <returns></returns>
/// <a href="!:http://msdn.microsoft.com/en-us/library/system.math.atan.aspx" />
public static IQuantity Atan(this IQuantity d, IPlanarAngle desiredUnit = null)
{
return(CalculateAngular(d, desiredUnit, Math.Atan));
}