atan2

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Revision as of 15:33, 28 June 2014 by Ffur2007slx2 5 (talk | contribs) (note formating)
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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

atan.jpg

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

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Notes

Posted on 08:00, 18 November 2009
KeV
To get the direction of an object from the player: _dir = ((getPos _obj select 0) - (getPos player select 0)) atan2 ((getPos _obj select 1) - (getPos player select 1)); //_dir will be from -180 to 180. If positive values are needed then use: if (_dir < 0) then {_dir = _dir + 360}; Or just use BIS_fnc_dirTo directly.

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