Atan2

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Atan2

Returns the angle in radians, from -pi to pi, of the point at x, y.

Syntax

Declare Function Atan2 ( ByVal y As Double, ByVal x As Double ) As Double

Description

ATan2 returns the arctangent of the ratio y/x as a Double within the range of -Pi to Pi. The arctangent is the inverse of the Tan function. The returned angle is measured in radians (not degrees).

ATan2 cannot be overloaded as operator to accept user-defined types.

Return Value

The angle whose tangent is y/x, in radians, in the range [-Pi..Pi].

Remarks

Usage

result = ATan2( y, x )

Differences from QB

• New to FreeBASIC

Dialect Differences

• Not available in the -lang qb dialect unless referenced with the alias __Atan2.

See also

• Tan
• Atn

Examples

Print Atan2 ( 4, 5 ) 'this is the same as PRINT ATN ( 4 / 5 )

The output would be:

0.6747409422235527

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Category: Mathematical Functions
Kind: function

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Reproduced from the FreeBASIC Wiki Manual under the GNU Free Documentation License 1.3 — with no Invariant Sections, no Front-Cover Texts and no Back-Cover Texts. Copyright © the FreeBASIC project and wiki contributors. See License.