lineIntersects

1.62 1.00 0.50

GAGlobal

Hover & click on the images for description

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 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)

2.20

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:

• terrainIntersect
• terrainIntersectASL
• lineIntersects
• lineIntersectsWith
• lineIntersectsObjs
• intersect