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64 lines
2.5 KiB
Plaintext
64 lines
2.5 KiB
Plaintext
#include "script_component.hpp"
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/*
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* Author: PabstMirror
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* DEV function to build mortar tables, very cpu intensive (never used durring normal gameplay)
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*
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* Arguments:
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* 0: Shot Angle (degrees) <NUMBER>
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* 1: Muzzle Velocity (m/s) <NUMBER>
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* 2: Air Friction <NUMBER>
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* 3: Tempeture (degres celcius) <NUMBER>
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* 4: Relative Air Denisty <NUMBER>
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* 5: Tail Wind (m/s) <NUMBER>
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* 6: Cross Wind (m/s) <NUMBER>
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* 7: Height Of Target (M) <NUMBER>
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* 8: Time Step (fraction of a second) <NUMBER>
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*
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* Return Value:
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* <ARRAY> [Distance Traveled<NUMBER>, Shot Time<NUMBER>, Offset (degrees)<NUMBER>]
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*
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* Example:
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* [45, 180, -0.0001, 15, 1, 10, 0, 0, 1/50] call ace_mk6mortar_fnc_dev_simulateShot;
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*
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* Public: No
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*/
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params ["_angleDeg", "_muzzleVelocity", "_airFriction", "_temp", "_relDensity", "_tailWind", "_crosswind", "_heightOfTarget", "_timeStep"];
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private _wind = [_crosswind, _tailWind, 0];
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private _gravity = [0,0,-9.8];
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private _currentPos = [0,0,0];
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private _muzzleVelocity = _muzzleVelocity * (((_temp + 273.13) / 288.13 - 1) / 40 + 1);
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private _currentVelocity = [0, (_muzzleVelocity * cos _angleDeg), (_muzzleVelocity * sin _angleDeg)];
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private _currentTime = 0;
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private _lastPos = _currentPos;
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private _kCoefficent = -1 * _relDensity * _airFriction; //save time in the loop and compute once
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while {((_currentVelocity select 2) > 0) || ((_currentPos select 2) >= _heightOfTarget)} do {
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_lastPos = _currentPos;
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private _aparentWind = _wind vectorDiff _currentVelocity;
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private _changeInVelocity = _gravity vectorAdd (_aparentWind vectorMultiply ((vectorMagnitude _aparentWind) * _kCoefficent));
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_currentVelocity = _currentVelocity vectorAdd (_changeInVelocity vectorMultiply _timeStep);
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_currentPos = _currentPos vectorAdd (_currentVelocity vectorMultiply _timeStep);
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_currentTime = _currentTime + _timeStep;
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};
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//Uses linearConversion to get a weighted average betwen points before and after dropping below target height
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private _linConversion = linearConversion [(_lastPos select 2), (_currentPos select 2), _heightOfTarget, 0, 1, true];
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private _middlePos = (_lastPos vectorMultiply (1 - _linConversion)) vectorAdd (_currentPos vectorMultiply (_linConversion));
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// private _middlePosOld = (_lastPos vectorAdd _currentPos) vectorMultiply 0.5;
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//Same to find travel time
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private _middleTotalTravelTime = _currentTime - (_timeStep * (1-_linConversion));
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//Find shot offset (from crosswind), in degrees
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private _offsetDeg = (_middlePos select 0) aTan2 (_middlePos select 1);
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[(_middlePos select 1), _middleTotalTravelTime, _offsetDeg]
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