lineIntersects: Difference between revisions

From Bohemia Interactive Community
(Clarified last parameters as optional)
m (fixed alt syntax and example 4)
 
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{{Command|= Comments
{{RV|type=command
____________________________________________________________________________________________


| arma2oa |= Game name
|game1= arma2oa
|version1= 1.62


|1.61|= Game version
|game2= tkoh
____________________________________________________________________________________________
|version2= 1.00


| Checks for object intersection with a virtual line between two positions. Returns true if intersects with an object. |= Description
|game3= arma3
____________________________________________________________________________________________
|version3= 0.50


| '''lineIntersects''' [begPos, endPos, withObj, ignoreObj] |= Syntax
|arg= global


|p1= begPos: [[PositionASL]] |= Parameter 1
|gr1= Math - Geometry
|p2= endPos: [[PositionASL]] |= Parameter 2
|p3= objIgnore1: (optional) [[Object]] object to ignore. When testing intersection from an object/unit/vehicle, pass that object here to prevent intersection inside of the object.|=Parameter 3
|p4= objIgnore2: (optional) [[Object]] another object to ignore. When testing intersection of a line between two objects, pass the second object here to prevent interesection inside of it being reported|= Parameter 4


| [[Boolean]] - true if intersection |= Return value
|descr= Checks for object intersection with a virtual line between two positions. Since {{GVI|arma3|2.20|size= 0.75}}, there is an alternative syntax that does multiple checks in parallel, faster than multiple calls.
____________________________________________________________________________________________
{{Feature|informative|
 
* Does not work under water.
|x1= <pre>lineIntersects [getPosASL player, getPosASL chopper, player, chopper]</pre> |= Example 1
* Max hardcoded distance is 1000m.
____________________________________________________________________________________________
}}
 
|s1= [[lineIntersects]] [begPos, endPos, objIgnore1, objIgnore2]
 
|p1= begPos: [[Array]] format [[Position#PositionASL|PositionASL]]
 
|p2= endPos: [[Array]] format [[Position#PositionASL|PositionASL]]


| [[terrainIntersect]], [[lineIntersectsWith]] |= See also
|p3= objIgnore1: [[Object]] - (Optional, default [[objNull]]) object to ignore. When testing intersections from an object/unit/vehicle, pass that object here to prevent intersections inside of the object


}}
|p4= objIgnore2: [[Object]] - (Optional, default [[objNull]]) another object to ignore. When testing intersections of a line between two objects, pass the second object here to prevent intersections inside of it being reported
 
|r1= [[Boolean]] - [[true]] if an intersection happens with an object (not with terrain)
 
|s2= [[lineIntersects]] <nowiki>[[</nowiki>element1, element2, ...<nowiki>]]</nowiki>
 
|s2since= arma3 2.20


<h3 style="display:none">Notes</h3>
|p21= elementN: [[Array]] format [begPos, endPos, objIgnore1, objIgnore2]:
<dl class="command_description">
* begPos: [[Array]] format [[Position#PositionASL|PositionASL]]
<!-- Note Section BEGIN -->
* endPos: [[Array]] format [[Position#PositionASL|PositionASL]]
* objIgnore1: [[Object]] - (Optional, default [[objNull]]) object to ignore. When testing intersections from an object/unit/vehicle, pass that object here to prevent intersections inside of the object
* objIgnore2: [[Object]] - (Optional, default [[objNull]]) another object to ignore. When testing intersections of a line between two objects, pass the second object here to prevent intersections inside of it being reported


<dd class="notedate">Posted on may 31, 2012 - 10:46 (CEST)
|r2= [[Array]] format [result1, result2, ...] - [[true]] if an intersection happens with an object (not with terrain) for the Nth element
<dt class="note">'''[[User:Lou Montana|Lou Montana]]'''
<dd class="note">Please note the difference :
*terrainIntersect
*lineIntersect'''''s'''''
*lineIntersect'''''s'''''With


<!-- Note Section END -->
|x1= <sqf>private _hasStraightLineToChopper = lineIntersects [eyePos player, aimPos chopper, player, chopper];</sqf>
</dl>


<h3 style="display:none">Bottom Section</h3>
|x2= Alternative syntax to check intersections in parallel:
<sqf>
private _enemies = units opfor;
private _enemyDataArray = _enemies apply { [eyePos player, aimPos _x, player, _x] };
private _result = lineIntersects [_enemyDataArray];
</sqf>


[[Category:ArmA 2 OA: New Scripting Commands List|{{uc:{{PAGENAME}}}}]]
|seealso= [[lineIntersectsSurfaces]] [[lineIntersectsObjs]] [[lineIntersectsWith]] [[terrainIntersect]] [[terrainIntersectASL]] [[terrainIntersectAtASL]] [[intersect]] [[cursorObject]] [[cursorTarget]] [[checkVisibility]]
[[Category:Scripting Commands ArmA2|{{uc:{{PAGENAME}}}}]]
}}
[[Category:Scripting_Commands_Take_On_Helicopters|{{uc:{{PAGENAME}}}}]]
 
[[Category:Scripting Commands|{{uc:{{PAGENAME}}}}]]
{{Note
|user= Lou Montana
|timestamp= 20120531104600
|text= Please note the difference:
* [[terrainIntersect]]
* [[terrainIntersectASL]]
* [[lineIntersects]]
* [[lineIntersectsWith]]
* [[lineIntersectsObjs]]  
* [[intersect]]
}}

Latest revision as of 17:55, 16 May 2025

A2 OA Logo.png 1.62tkoh logo small.png 1.00Arma 3 logo black.png 0.50
GAGlobal
Hover & click on the images for description

Description

Description:
Checks for object intersection with a virtual line between two positions. Since Arma 3 logo black.png 2.20, there is an alternative syntax that does multiple checks in parallel, faster than multiple calls.
ⓘ
  • Does not work under water.
  • Max hardcoded distance is 1000m.
Groups:
Math - Geometry

Syntax

Syntax:
lineIntersects [begPos, endPos, objIgnore1, objIgnore2]
Parameters:
begPos: Array format PositionASL
endPos: Array format PositionASL
objIgnore1: Object - (Optional, default objNull) object to ignore. When testing intersections from an object/unit/vehicle, pass that object here to prevent intersections inside of the object
objIgnore2: Object - (Optional, default objNull) another object to ignore. When testing intersections of a line between two objects, pass the second object here to prevent intersections inside of it being reported
Return Value:
Boolean - true if an intersection happens with an object (not with terrain)

Alternative Syntax

Syntax:
lineIntersects [[element1, element2, ...]]
Parameters:
elementN: Array format [begPos, endPos, objIgnore1, objIgnore2]:
  • begPos: Array format PositionASL
  • endPos: Array format PositionASL
  • objIgnore1: Object - (Optional, default objNull) object to ignore. When testing intersections from an object/unit/vehicle, pass that object here to prevent intersections inside of the object
  • objIgnore2: Object - (Optional, default objNull) another object to ignore. When testing intersections of a line between two objects, pass the second object here to prevent intersections inside of it being reported
Return Value:
Array format [result1, result2, ...] - true if an intersection happens with an object (not with terrain) for the Nth element

Examples

Example 1:
private _hasStraightLineToChopper = lineIntersects [eyePos player, aimPos chopper, player, chopper];
Example 2:
Alternative syntax to check intersections in parallel:
private _enemies = units opfor; private _enemyDataArray = _enemies apply { [eyePos player, aimPos _x, player, _x] }; private _result = lineIntersects [_enemyDataArray];

Additional Information

See also:
lineIntersectsSurfaces lineIntersectsObjs lineIntersectsWith terrainIntersect terrainIntersectASL terrainIntersectAtASL intersect cursorObject cursorTarget checkVisibility

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
Lou Montana - c
Posted on May 31, 2012 - 10:46 (UTC)
Please note the difference:
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