atan2

1.00

Hover & click on the images for description

Description

Description:

ArcTangent of x/y. Used to determine the angle of a vector [x,y]. Result in Degrees.
Note that this command can handle y being 0, unlike when using atan, and will return 90

Groups:

Uncategorised

Syntax

Syntax:

Number = x atan2 y

Parameters:

x: Number

y: Number

Return Value:

Number

Examples

Example 1:

_xy = [5,3]; _degrees= (_xy select 0) atan2 (_xy select 1); //59.0362

Example 2:

Get direction from _obj1 to _obj2:_vd = getPosASL _obj2 vectorDiff getPosASL _obj1; _dir = (_vd select 0) atan2 (_vd select 1); //_dir range from -180 to +180 if (_dir < 0) then {_dir = 360 + _dir}; //_dir range from 0 to 360

Additional Information

See also:

atanMath Commands

Notes

Report bugs on the Feedback Tracker and/or discuss them on the Arma Discord or on the Forums.
Only post proven facts here! Add Note

Notes

To get the direction of an object from the player:
_direction = ((getpos object select 0) - (getpos player select 0)) atan2 ((getpos object select 1) - (getpos player select 1));
_direction will be from -180 to 180
If positive values are needed then use:
if(_direction < 0) then {_direction = _direction + 360};