Issue:

• Missle Guidance - Remote lased hellfire seeker jittering #11136 (comment)
• Missle Guidance - Remote lased hellfire seeker jittering #11136 (comment)

When merged this pull request will:

• Adjusts the default ACE_DEFAULT_LASER_BEAMSPREAD from 1.0 → 0.15 (0.3 mrad)

Note: The value 0.15 here is not in mrad. Based on in-game geometric testing, 0.15 corresponds to a physical divergence of ~0.3 mrad.

Real-World Laser Divergence Reference

Values compiled with ChatGPT (Free Model) and confirmed with Gemini Thinking (Free Model).

Reason for Selecting 0.3 mrad

Most LTD systems cluster around 0.2–0.3 mrad, so 0.3 mrad best represents the typical baseline, while higher values like 0.6–0.7 mrad seen on Ka-52/Mi-28N are exceptions rather than the norm.

Note

• I am not very familiar with math, so I verified the divergence through in-game debugging and visual visualization of the beam.
• This PR only updates the global default value.
  While setting detailed, per-platform beam divergence values would be more accurate, that level of data work and integration is beyond what I can handle.

Visual Demonstration

The example below shows the maximum possible left- and right-side ray offsets generated, and the measured distance between them using the updated value 0.15(0.3mrad).
Please reference the red debug text:
“Distance: %1 m, Beam Diameter: %2 m”

Debug Code

To visualize the beam diameter, insert the code at:

private _endpoints = [];
{
    private _radOffset = _x;
    private _offset = [_vecRotateMap, _radOffset] call FUNC(rotateVectLine);
    private _offsetPos = _pos2 vectorAdd (_offset vectorMultiply (_divergence * 1));

    private _offsetVector = _pos vectorFromTo _offsetPos;
    TRACE_4("",_radOffset,_offset,_offsetPos,_offsetVector);
    private _result1 = [_pos, _offsetVector, _ignoreObj1] call FUNC(shootRay);
    _endpoints pushBack _result1#0;
} forEach [180,0];

#ifdef DRAW_LASER_INFO
if (count _endpoints == 2) then {
    TRACE_1("",_endpoints);
    _endpoints params ["_left", "_right"];
    private _midPoint = (_left vectorAdd _right) vectorMultiply 0.5;
    private _text = format ["Distance: %1 m, Beam Diameter: %2 m",_midPoint vectorDistance _pos, _left vectorDistance _right];
    drawLine3D [ASLToAGL _left vectorAdd [0,0,0.5], ASLToAGL _left, [1,0,0,1]];
    drawLine3D [ASLToAGL _right, ASLToAGL _right vectorAdd [0,0,0.5], [1,0,0,1]];
    drawLine3D [ASLToAGL _left vectorAdd [0,0,0.5], ASLToAGL _right vectorAdd [0,0,0.5], [1,0,0,1]];
    drawIcon3D ["\a3\ui_f\data\IGUI\Cfg\Cursors\selectover_ca.paa", [1, 0, 0, 1], ASLToAGL _midPoint vectorAdd [0,0,0.5], 1, 1, 0, _text, 0.4, 0.025, "TahomaB"];
};
#endif

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