BIS fnc rotateVector2D: Difference between revisions

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|descr= This function returns a 2D vector rotated a specified number of degrees around the origin.
|descr= This function returns a 2D vector rotated a specified number of degrees around the origin.


|s1=[vector2D, angle] call [[BIS_fnc_rotateVector2D]]
|s1= [vector2D, angle] call [[BIS_fnc_rotateVector2D]]


|p1= vector2D: [[Array]] - 2D vector
|p1= vector2D: [[Array]] - 2D vector


|p2= angle: [[Number]] - Angle in degree
|p2= angle: [[Number]] - angle in degree


|r1= [[Array]] - New vector
|r1= [[Array]] - new vector


|x1= <code>[ [5,3], 60 ] [[call]] [[BIS_fnc_rotateVector2D]];//Returns[-0.0980766,5.83013]</code>
|x1= <sqf>[[5,3], 60] call BIS_fnc_rotateVector2D;//Returns[-0.0980766,5.83013]</sqf>


|seealso= [[BIS_fnc_crossProduct]] [[BIS_fnc_magnitudeSqr]] [[BIS_fnc_vectorFromXToY]]
|seealso= [[BIS_fnc_crossProduct]] [[BIS_fnc_magnitudeSqr]] [[BIS_fnc_vectorFromXToY]]
}}
}}
||||


<dl class="command_description">
{{Note
 
|user= AgentRev
<dt></dt>
|timestamp= 20150121141500
<dd class="notedate">Posted on January 21, 2015 - 14:15 (UTC)</dd>
|text= Be careful when using this function in conjunction with [[getDir]] or [[BIS_fnc_dirTo]], which return a clockwise angle, while the rotation is done counterclockwise as per trigonometric conventions.<br>
<dt class="note">[[User:AgentRev|AgentRev]]</dt>
<dd class="note">
Be careful when using this function in conjunction with [[getDir]] or [[BIS_fnc_dirTo]], which return a clockwise angle, while the rotation is done counterclockwise as per trigonometric conventions.
<br>
To counter this, simply negate their output:
To counter this, simply negate their output:
 
<sqf>
<code>[<nowiki>[0,1,0]</nowiki>, '''-('''[[getDir]] _object''')'''] [[call]] [[BIS_fnc_rotateVector2D]];</code>
[[0,1,0], -(getDir _object)] call BIS_fnc_rotateVector2D;
<code>[<nowiki>[0,1,0]</nowiki>, '''-('''[_unit, _vehicle] [[call]] [[BIS_fnc_dirTo]]''')'''] [[call]] [[BIS_fnc_rotateVector2D]];</code>
[[0,1,0], -([_unit, _vehicle] call BIS_fnc_dirTo)] call BIS_fnc_rotateVector2D;
</dd>
</sqf>
 
}}
</dl>

Latest revision as of 16:39, 8 November 2023

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Hover & click on the images for description

Description

Description:
This function returns a 2D vector rotated a specified number of degrees around the origin.
Execution:
call
Groups:
Vectors

Syntax

Syntax:
[vector2D, angle] call BIS_fnc_rotateVector2D
Parameters:
vector2D: Array - 2D vector
angle: Number - angle in degree
Return Value:
Array - new vector

Examples

Example 1:
[[5,3], 60] call BIS_fnc_rotateVector2D;//Returns[-0.0980766,5.83013]

Additional Information

See also:
BIS_fnc_crossProduct BIS_fnc_magnitudeSqr BIS_fnc_vectorFromXToY

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
AgentRev - c
Posted on Jan 21, 2015 - 14:15 (UTC)
Be careful when using this function in conjunction with getDir or BIS_fnc_dirTo, which return a clockwise angle, while the rotation is done counterclockwise as per trigonometric conventions.
To counter this, simply negate their output:
[[0,1,0], -(getDir _object)] call BIS_fnc_rotateVector2D; [[0,1,0], -([_unit, _vehicle] call BIS_fnc_dirTo)] call BIS_fnc_rotateVector2D;
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