Returns the angle between the X-axis and the ray from the origin to the specified point.
Namespace: Extreme.MathematicsAssembly: Extreme.Numerics.Net40 (in Extreme.Numerics.Net40.dll) Version: 6.0.16073.0 (6.0.17114.0)
public static decimal Atan2(
decimal yValue,
decimal xValue
)
Public Shared Function Atan2 (
yValue As Decimal,
xValue As Decimal
) As Decimal
public:
static Decimal Atan2(
Decimal yValue,
Decimal xValue
)
static member Atan2 :
yValue : decimal *
xValue : decimal -> decimal
Parameters
- yValue
- Type: SystemDecimal
The y coordinate of a point.
- xValue
- Type: SystemDecimal
The x coordinate of a point.
Return Value
Type:
Decimal
An angle, θ, measured in radians, such that -π≤θ≤π, and tan(θ) = y / x, where
(x, y) is a point in the Cartesian plane. Observe the following: For (x,
y) in quadrant 1, 0 < θ < π/2.For (x, y) in quadrant 2, π/2 < θ≤π.For (x,
y) in quadrant 3, -π < θ < -π/2.For (x, y) in quadrant 4, -π/2 < θ < 0.For
points on the boundaries of the quadrants, the return value is the following:If
y is 0 and x is not negative, θ = 0.If y is 0 and x is negative, θ = π. If
y is positive and x is 0, θ = π/2. If y is negative and x is 0, θ = -π/2.
Numerical Libraries
Supported in: 6.0, 5.x, 4.x
Reference