atan2: Difference between revisions
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Lou Montana (talk | contribs) m (Text replacement - "\{\{( *)Important( *)\|" to "{{$1Feature$2|$2important$2|") |
Lou Montana (talk | contribs) m (Text replacement - "<code> +" to "<code>") |
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<dt class="note">[[User:KeV|KeV]]<dd class="note"> | <dt class="note">[[User:KeV|KeV]]<dd class="note"> | ||
To get the direction of an object from the player: | To get the direction of an object from the player: | ||
<code> | <code>_dir = (([[getPos]] _obj [[select]] 0) - ([[getPos]] [[player]] [[select]] 0)) [[atan2]] (([[getPos]] _obj [[select]] 1) - ([[getPos]] [[player]] [[select]] 1)); | ||
_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. | //_dir will be from -180 to 180. | ||
</code> | </code> | ||
If positive values are needed then use: | If positive values are needed then use: | ||
<code> | <code>[[if]] (_dir < 0) [[then]] {_dir = _dir + 360}; | ||
[[if]] (_dir < 0) [[then]] {_dir = _dir + 360}; | |||
</code> | </code> | ||
Or just use [[BIS_fnc_dirTo]] directly. | Or just use [[BIS_fnc_dirTo]] directly. | ||
Revision as of 16:52, 7 February 2021
Description
- Description:
- Description needed
- Groups:
- Math - Geometry
Syntax
- Syntax:
- Syntax needed
- Parameters:
- x: Number
- y: Number
- Return Value:
- Return value needed
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 - Example 3:
- Get relative direction from _obj1 to _obj2:
_xy = _obj1 worldToModel getPosASL _obj2; _dir = (_xy select 0) atan2 (_xy 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:
- See also needed
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
- 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.