lineIntersects: Difference between revisions

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m (example format)
(Add game version for alternative syntax to description. Minor typo corrections. Reordered see also commands to be grouped and consistent across lineIntersects pages)
 
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{{Command|= Comments
{{RV|type=command
____________________________________________________________________________________________


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


|1.62|= 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.
|game3= arma3
|version3= 0.50


<br><br>'''NOTE:''' Doesn't work under water. |= Description
|arg= global
____________________________________________________________________________________________


| '''lineIntersects''' [begPos, endPos, objIgnore1, objIgnore2] |= Syntax
|gr1= Math - Geometry


|p1= begPos: [[PositionASL]] |= Parameter 1
|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 at once, faster than multiple calls.
|p2= endPos: [[PositionASL]] |= Parameter 2
{{Feature|informative|
|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
* Does not work under water.
|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
* 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]]
 
|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


| [[Boolean]] - true if intersection |= Return value
|r1= [[Boolean]] - [[true]] if an intersection happens with an object (not with terrain)
____________________________________________________________________________________________
 
|x1= <code>lineIntersects [ [[eyePos]] [[player]], [[aimPos]] chopper, [[player]], chopper]</code> |= Example 1
____________________________________________________________________________________________


| [[intersect]], [[terrainIntersect]], [[terrainIntersectASL]], [[lineIntersectsWith]], [[lineIntersectsObjs]] |= See also
|s2= [[lineIntersects]] [element1, element2, ...]


}}
|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]]
*[[terrainIntersectASL]]
*[[lineIntersects]]
*[[lineIntersectsWith]]
*[[lineIntersectsObjs]]
*[[intersect]]


<!-- 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 Arma 3|{{uc:{{PAGENAME}}}}]]
 
[[Category:Scripting_Commands_Take_On_Helicopters|{{uc:{{PAGENAME}}}}]]
{{Note
[[Category:Scripting Commands|{{uc:{{PAGENAME}}}}]]
|user= Lou Montana
|timestamp= 20120531104600
|text= Please note the difference:
* [[terrainIntersect]]
* [[terrainIntersectASL]]
* [[lineIntersects]]
* [[lineIntersectsWith]]
* [[lineIntersectsObjs]]  
* [[intersect]]
}}

Latest revision as of 02:03, 1 December 2024

A2 OA Logo.png1.62tkoh logo small.png1.00Arma 3 logo black.png0.50
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.png2.20, there is an alternative syntax that does multiple checks at once, 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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