lineIntersectsWith

1.62 1.00 0.50

GAGlobal

Hover & click on the images for description

Description

Description:

Returns objects intersecting with the virtual line from begPos to endPos. By default, the resulting array of intersecting objects is unsorted (see sortByDistance).

ⓘ

• Does not work under water.
• Max hardcoded distance is 1000m.

Since 2.20, there is an alternative syntax that does multiple checks in parallel, faster than multiple calls.

Groups:

Math - Geometry

Syntax

Syntax:

lineIntersectsWith [begPos, endPos, objIgnore1, objIgnore2, sortByDistance]

Parameters:

begPos: PositionASL - virtual line start

endPos: PositionASL - virtual line end

objIgnore1: Object - (Optional) 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) 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

sortByDistance: Boolean - (Optional) true: sort by descending distance (furthermost object first, closest object last); false: unsorted

Return Value:

Array - intersecting objects

2.20

Alternative Syntax

Syntax:

lineIntersectsWith [[element1, element2, ...]]

Parameters:

elementN: Array with [begPos, endPos, objIgnore1, objIgnore2, sortByDistance]

• begPos: PositionASL - virtual line start
• endPos: PositionASL - virtual line end
• objIgnore1: Object - (Optional) 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) 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
• sortByDistance: Boolean - (Optional) true: sort by descending distance (furthermost object first, closest object last); false: unsorted

Return Value:

Array with [result1, result2, ...] - each result is an Array of intersecting objects for the Nth element

Examples

Example 1:

_objects = lineIntersectsWith [eyePos player, AGLToASL screenToWorld [0.5, 0.5]];

Example 2:

Sort by distance:

_objects = lineIntersectsWith [eyePos player, AGLToASL screenToWorld [0.5, 0.5], objNull, objNull, true];

Example 3:

Ignore objects:

_objects = lineIntersectsWith [eyePos player, aimPos chopper, player, chopper];

Example 4:

Alternative syntax to check intersections in parallel:

private _enemies = units opfor; private _enemyDataArray = _enemies apply { [eyePos player, aimPos _x, player, _x, true] }; private _result = lineIntersectsWith [_enemyDataArray];

Additional Information

See also:

lineIntersectsSurfaces lineIntersectsObjs lineIntersects terrainIntersect terrainIntersectASL terrainIntersectAtASL intersect cursorObject cursorTarget checkVisibility

Notes

Report bugs on the Feedback Tracker and/or discuss them on the Arma Discord.
Only post proven facts here! Add Note

Lou Montana - c

Posted on May 31, 2012 - 10:50 (UTC)

Please note the difference :

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