lineIntersects: Difference between revisions
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Pennyworth (talk | contribs) (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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|gr1= Math - Geometry | |gr1= Math - Geometry | ||
|descr= Checks for object intersection with a virtual line between two positions. | |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. | ||
{{Feature|informative| | {{Feature|informative| | ||
* Does not work under water. | * Does not work under water. | ||
* Max | * Max hardcoded distance is 1000m. | ||
}} | }} | ||
| Line 26: | Line 26: | ||
|p2= endPos: [[Array]] format [[Position#PositionASL|PositionASL]] | |p2= endPos: [[Array]] format [[Position#PositionASL|PositionASL]] | ||
|p3= objIgnore1: [[Object]] - (Optional, default [[objNull]]) object to ignore. When testing | |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 | |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) | |r1= [[Boolean]] - [[true]] if an intersection happens with an object (not with terrain) | ||
| | |s2= [[lineIntersects]] [element1, element2, ...] | ||
|seealso= [[lineIntersectsSurfaces]] [[ | |s2since= arma3 2.20 | ||
|p21= elementN: [[Array]] format [begPos, endPos, objIgnore1, objIgnore2]: | |||
* begPos: [[Array]] format [[Position#PositionASL|PositionASL]] | |||
* 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 | |||
|r2= [[Array]] format [result1, result2, ...] - [[true]] if an intersection happens with an object (not with terrain) for the Nth element | |||
|x1= <sqf>private _hasStraightLineToChopper = lineIntersects [eyePos player, aimPos chopper, player, chopper];</sqf> | |||
|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> | |||
|seealso= [[lineIntersectsSurfaces]] [[lineIntersectsObjs]] [[lineIntersectsWith]] [[terrainIntersect]] [[terrainIntersectASL]] [[terrainIntersectAtASL]] [[intersect]] [[cursorObject]] [[cursorTarget]] [[checkVisibility]] | |||
}} | }} | ||
Latest revision as of 02:03, 1 December 2024
Description
- Description:
- Checks for object intersection with a virtual line between two positions. Since
2.20, there is an alternative syntax that does multiple checks at once, faster than multiple calls.
- 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:
- Example 2:
- Alternative syntax to check intersections in parallel:
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
- Posted on May 31, 2012 - 10:46 (UTC)
- Please note the difference: