Example Code: Random Area Distribution: Difference between revisions

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[[private]] _center = [[getPosATL]] [[player]]; {{cc|disc center definition}}
<sqf>
[[private]] _radius = 50; {{cc|radius definition}}
private _center = getPosATL player; // disc center definition
private _radius = 50; // radius definition
{{cc|random radius}}
 
[[private]] _angle = [[random]] 360; {{cc|angle definition (0..360)}}
// random radius
[[private]] _distance = [[random]] _radius; {{cc|distance from the center definition (0..radius)}}
private _angle = random 360; // angle definition (0..360)
[[private]] _position = _center [[getPos]] [_distance, _angle];
private _distance = random _radius; // distance from the center definition (0..radius)
private _position = _center getPos [_distance, _angle];
{{cc|random position}}
 
[[private]] _angle = [[random]] 360; {{cc|angle definition (0..360)}}
// random position
[[private]] _randomSquareRoot = [[sqrt]] [[random]] 1; {{cc|random square-root to obtain a non-linear 0..1 value}}
private _angle = random 360; // angle definition (0..360)
[[private]] _distance = _radius * _randomSquareRoot; {{cc|distance from the center definition (0..radius)}}
private _randomSquareRoot = sqrt random 1; // random square-root to obtain a non-linear 0..1 value
[[private]] _position = _center [[getPos]] [_distance, _angle];
private _distance = _radius * _randomSquareRoot; // distance from the center definition (0..radius)
private _position = _center getPos [_distance, _angle];
{{cc|Gaussian normal distribution}}
 
[[private]] _angleHalf = [[random]] 180;
// Gaussian normal distribution
[[private]] _randomGauss = [[random]] [-1, 0, 1];
private _angleHalf = random 180;
[[private]] _distance = _radius * _randomGauss;
private _randomGauss = random [-1, 0, 1];
[[private]] _position = _center [[getPos]] [_distance, _angleHalf];
private _distance = _radius * _randomGauss;
private _position = _center getPos [_distance, _angleHalf];
</sqf>




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[[private]] ["_center", "_radius", "_angle", "_distance", "_offset", "_position"]; {{cc|private definitions}}
<sqf>
_center = [[getPosATL]] [[player]]; {{cc|disc center definition}}
private ["_center", "_radius", "_angle", "_distance", "_offset", "_position"]; // private definitions
[[private]] _radius = 50; {{cc|radius definition}}
_center = getPosATL player; // disc center definition
private _radius = 50; // radius definition
{{cc|random radius}}
 
_angle = [[random]] 360;
// random radius
_distance = [[random]] _radius;
_angle = random 360;
_offset = [<nowiki/>[[sin]] _angle * _distance, [[cos]] _angle * _distance, 0];
_distance = random _radius;
_position = [_center, _offset] [[call]] [[BIS_fnc_vectorAdd]];
_offset = [sin _angle * _distance, cos _angle * _distance, 0];
_position = [_center, _offset] call BIS_fnc_vectorAdd;
{{cc|random position}}
 
_angle = [[random]] 360;
// random position
_distance = _radius * [[sqrt]] [[random]] 1;
_angle = random 360;
_offset = [<nowiki/>[[sin]] _angle * _distance, [[cos]] _angle * _distance, 0];
_distance = _radius * sqrt random 1;
_position = [_center, _offset] [[call]] [[BIS_fnc_vectorAdd]];
_offset = [sin _angle * _distance, cos _angle * _distance, 0];
_position = [_center, _offset] call BIS_fnc_vectorAdd;
</sqf>




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}}
}}


[[private]] ["_center", "_radius", "_angle", "_distance", "_offset", "_position"]; {{cc|private definitions}}
<sqf>
_center = [[getPos]] [[player]]; {{cc|disc center definition - [[getPosASL]] can be used in {{arma1}}}}
private ["_center", "_radius", "_angle", "_distance", "_offset", "_position"]; // private definitions
[[private]] _radius = 50; {{cc|radius definition}}
_center = getPos player; // disc center definition - getPosASL can be used in Armed Assault
private _radius = 50; // radius definition
{{cc|random radius}}
 
_angle = [[random]] 360;
// random radius
_distance = [[random]] _radius;
_angle = random 360;
_offset = [<nowiki/>[[sin]] _angle * _distance, [[cos]] _angle * _distance];
_distance = random _radius;
_position = [(_center [[select]] 0) + (_offset [[select]] 0), (_center [[select]] 1) + (_offset [[select]] 1)];
_offset = [sin _angle * _distance, cos _angle * _distance];
_position = [(_center select 0) + (_offset select 0), (_center select 1) + (_offset select 1)];
{{cc|random position}}
 
_angle = [[random]] 360;
// random position
_distance = _radius * [[sqrt]] [[random]] 1;
_angle = random 360;
_offset = [<nowiki/>[[sin]] _angle * _distance, [[cos]] _angle * _distance, 0];
_distance = _radius * sqrt random 1;
_position = [(_center [[select]] 0) + (_offset [[select]] 0), (_center [[select]] 1) + (_offset [[select]] 1)];
_offset = [sin _angle * _distance, cos _angle * _distance, 0];
_position = [(_center select 0) + (_offset select 0), (_center select 1) + (_offset select 1)];
</sqf>




Revision as of 19:45, 2 April 2022

From left to right:
  1. random radius
  2. random position in a circle
  3. Gaussian normal distribution

Originally from Commy2's forum post, also fully translated on Dedmen's sqf.ovh post.


Arma 3

ⓘ
  • object getPos [distance, direction] has been introduced in Arma 3 logo black.png1.56
  • Gaussian random [min, mid, max] has been introduced in Arma 3 logo black.png1.56

private _center = getPosATL player; // disc center definition private _radius = 50; // radius definition // random radius private _angle = random 360; // angle definition (0..360) private _distance = random _radius; // distance from the center definition (0..radius) private _position = _center getPos [_distance, _angle]; // random position private _angle = random 360; // angle definition (0..360) private _randomSquareRoot = sqrt random 1; // random square-root to obtain a non-linear 0..1 value private _distance = _radius * _randomSquareRoot; // distance from the center definition (0..radius) private _position = _center getPos [_distance, _angle]; // Gaussian normal distribution private _angleHalf = random 180; private _randomGauss = random [-1, 0, 1]; private _distance = _radius * _randomGauss; private _position = _center getPos [_distance, _angleHalf];


Arma 2

ⓘ

private ["_center", "_radius", "_angle", "_distance", "_offset", "_position"]; // private definitions _center = getPosATL player; // disc center definition private _radius = 50; // radius definition // random radius _angle = random 360; _distance = random _radius; _offset = [sin _angle * _distance, cos _angle * _distance, 0]; _position = [_center, _offset] call BIS_fnc_vectorAdd; // random position _angle = random 360; _distance = _radius * sqrt random 1; _offset = [sin _angle * _distance, cos _angle * _distance, 0]; _position = [_center, _offset] call BIS_fnc_vectorAdd;


Armed Assault / Operation Flashpoint: Resistance

ⓘ

private ["_center", "_radius", "_angle", "_distance", "_offset", "_position"]; // private definitions _center = getPos player; // disc center definition - getPosASL can be used in Armed Assault private _radius = 50; // radius definition // random radius _angle = random 360; _distance = random _radius; _offset = [sin _angle * _distance, cos _angle * _distance]; _position = [(_center select 0) + (_offset select 0), (_center select 1) + (_offset select 1)]; // random position _angle = random 360; _distance = _radius * sqrt random 1; _offset = [sin _angle * _distance, cos _angle * _distance, 0]; _position = [(_center select 0) + (_offset select 0), (_center select 1) + (_offset select 1)];


Operation Flashpoint

ⓘ
This is an SQS Syntax example.
private ["_center", "_radius", "_angle", "_distance", "_offset", "_position"]	// private definitions
_center = getPos player		// disc center definition
_radius = 50				// radius definition

// random radius
_angle = random 360
_distance = random _radius
_offset = [sin _angle * _distance, cos _angle * _distance]
_position = [(_center select 0) + (_offset select 0), (_center select 1) + (_offset select 1)]

// random position
_angle = random 360
_distance = _radius * sqrt random 1
_offset = [sin _angle * _distance, cos _angle * _distance, 0]
_position = [(_center select 0) + (_offset select 0), (_center select 1) + (_offset select 1)]
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