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Advanced Ballistics - Take object size and trees into account for terrain roughness #10697

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Merged
LinkIsGrim merged 2 commits into from
Feb 5, 2025
Merged

Advanced Ballistics - Take object size and trees into account for terrain roughness #10697

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cfcdfc6
Take object size and trees into account for terrain roughness
BaerMitUmlaut Jan 29, 2025
e673f9c
fix undefined var
LinkIsGrim Feb 5, 2025
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19 changes: 14 additions & 5 deletions addons/advanced_ballistics/functions/fnc_initializeTerrainExtension.sqf
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Original file line number Diff line number Diff line change
Expand Up @@ -43,7 +43,7 @@ GVAR(currentGrid) = 0;
INFO_2("Starting Terrain Extension [cells: %1] [world: %2]",_gridCells,worldName);

[{
params ["_args","_idPFH"];
params ["_args", "_idPFH"];
_args params ["_mapGrids", "_gridCells", "_initStartTime"];

if (GVAR(currentGrid) >= _gridCells) exitWith {
Expand All @@ -57,12 +57,21 @@ INFO_2("Starting Terrain Extension [cells: %1] [world: %2]",_gridCells,worldName
for "_i" from 1 to 50 do {
private _x = floor(GVAR(currentGrid) / _mapGrids) * 50;
private _y = (GVAR(currentGrid) - floor(GVAR(currentGrid) / _mapGrids) * _mapGrids) * 50;

private _gridCenter = [_x + 25, _y + 25];
private _gridHeight = round(getTerrainHeightASL _gridCenter);
private _gridNumObjects = count (_gridCenter nearObjects ["Building", 50]);
"ace" callExtension ["ballistics:map:set", [GVAR(currentGrid), _gridHeight, _gridNumObjects, surfaceIsWater _gridCenter]];
private _gridHeight = round getTerrainHeightASL _gridCenter;
private _gridBuildingCount = {
private _bb = boundingBoxReal [_x, "ViewGeometry"];
private _height = _bb#1#2 - _bb#0#2;
private _volume = (_bb#1#0 - _bb#0#0) * (_bb#1#1 - _bb#0#1) * _height;

(_height > 0.3) && {_volume > 10}
} count (_gridCenter nearObjects ["Building", 50]);
private _gridTreeCount = count nearestTerrainObjects [_windSource, ["TREE"], 50, false];
private _roughnessIndex = _gridBuildingCount + round (_gridTreeCount / 9);

"ace" callExtension ["ballistics:map:set", [GVAR(currentGrid), _gridHeight, _roughnessIndex, surfaceIsWater _gridCenter]];
GVAR(currentGrid) = GVAR(currentGrid) + 1;
if (GVAR(currentGrid) >= _gridCells) exitWith {};
};

}, 0, [_mapGrids, _gridCells, _initStartTime]] call CBA_fnc_addPerFrameHandler
19 changes: 10 additions & 9 deletions addons/weather/functions/fnc_calculateRoughnessLength.sqf
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Original file line number Diff line number Diff line change
Expand Up @@ -18,19 +18,20 @@
// Source: http://es.ucsc.edu/~jnoble/wind/extrap/index.html
#define ROUGHNESS_LENGTHS [0.0002, 0.0005, 0.0024, 0.03, 0.055, 0.1, 0.2, 0.4, 0.8, 1.6]

private _windSource = _this vectorDiff ((vectorNormalized wind) vectorMultiply 25);
private _windSource = ASLtoAGL (_this vectorDiff ((vectorNormalized wind) vectorMultiply 25));

Check notice on line 21 in addons/weather/functions/fnc_calculateRoughnessLength.sqf

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GitHub Actions / windows

`ASLtoAGL` does not match the wiki's case 

non-standard command case
private _nearBuildingCount = {
// Filter lights - fixes high roughness on airports (#6602)
str _x find "light" == -1
} count (ASLToAGL _windSource nearObjects ["Building", 50]);
private _bb = boundingBoxReal [_x, "ViewGeometry"];
private _height = _bb#1#2 - _bb#0#2;
private _volume = (_bb#1#0 - _bb#0#0) * (_bb#1#1 - _bb#0#1) * _height;

(_height > 0.3) && {_volume > 10}
} count (_windSource nearObjects ["Building", 50]);
private _nearTreeCount = count nearestTerrainObjects [_windSource, ["TREE"], 50, false];
private _isWater = surfaceIsWater _windSource;

if (_nearBuildingCount == 0 && _isWater) exitWith {
0.0005
};

if (_nearBuildingCount >= 10) exitWith {
1.6
};

ROUGHNESS_LENGTHS select (2 + (_nearBuildingCount min 6))
private _roughnessIndex = _nearBuildingCount + round (_nearTreeCount / 9);
ROUGHNESS_LENGTHS select (2 + _roughnessIndex min 9)