lineIntersectsObjs

1.10

GAGlobal

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Description

Description:

Returns a list of objects intersected by the line from begPos to endPos. Since 2.20, there is an alternative syntax that does multiple checks in parallel, faster than multiple calls.

Groups:

Math - Geometry

Syntax

Syntax:

lineIntersectsObjs [begPos, endPos, ignoreObj1, ignoreObj2, sortByDistance, flags]

Parameters:

begPos: PositionASL - virtual line start

endPos: PositionASL - virtual line end

ignoreObj1: Object - (Optional) - object to ignore

ignoreObj2: Object - (Optional) - object to ignore

sortByDistance: Boolean - (Optional) - true: furthest object first, closest object last; false: unsorted

flags: Number - (Optional)

• 1 - CF_ONLY_WATER
• 2 - CF_NEAREST_CONTACT
• 4 - CF_ONLY_STATIC
• 8 - CF_ONLY_DYNAMIC
• 16 - CF_FIRST_CONTACT
• 32 - CF_ALL_OBJECTS (Usable only with CF_FIRST_CONTACT and it will check one contact per object)

Flags can be combined: 2 + 4 = 6 is CF_NEAREST_OBJECT + CF_ONLY_STATIC

Return Value:

Array of Objects - intersecting objects

2.20

Alternative Syntax

Syntax:

lineIntersectsObjs [[element1, element2, ...]]

Parameters:

elementN: Array with [begPos, endPos, ignoreObj1, ignoreObj2, sortByDistance, flags]

• begPos: PositionASL - virtual line start
• endPos: PositionASL - virtual line end
• ignoreObj1: Object - (Optional) - object to ignore
• ignoreObj2: Object - (Optional) - object to ignore
• sortByDistance: Boolean - (Optional) - true: furthest object first, closest object last; false: unsorted
• flags: Number - (Optional)
  • 1 - CF_ONLY_WATER
  • 2 - CF_NEAREST_CONTACT
  • 4 - CF_ONLY_STATIC
  • 8 - CF_ONLY_DYNAMIC
  • 16 - CF_FIRST_CONTACT
  • 32 - CF_ALL_OBJECTS (Usable only with CF_FIRST_CONTACT and it will check one contact per object)

Flags can be combined: 2 + 4 = 6 is CF_NEAREST_OBJECT + CF_ONLY_STATIC

Return Value:

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

Examples

Example 1:

data = []; displayFunction = { { data set [_foreachindex, lineIntersectsObjs [eyePos player, ATLToASL screenToWorld [0.5, 0.5], objNull, objNull, false, _x]]; } forEach [1, 2, 4, 8, 16, 32]; hintSilent format ["ONLY_WATER: %1\nNEAREST_CONTACT: %2\nONLY_STATIC: %3\nONLY_DYNAMIC: %4\nFIRST_CONTACT: %5\nALL_OBJECTS: %6", data select 0, data select 1, data select 2, data select 3, data select 4, data select 5]; }; ["sample_id", "onEachFrame", "displayFunction"] call BIS_fnc_addStackedEventHandler; // example display objects' array in the middle of the screen sorted by 6 flags

Example 2:

Alternative syntax to check intersections in parallel:

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

Additional Information

See also:

lineIntersectsSurfaces lineIntersectsWith lineIntersects terrainIntersectASL terrainIntersectAtASL terrainIntersect 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

AgentRev - c

Posted on Mar 29, 2016 - 06:07 (UTC)

Distance sorting is relative to object model center, and not intersect position.