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56 lines
1.7 KiB
Plaintext
56 lines
1.7 KiB
Plaintext
/*
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* Author: PabstMirror
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* DEV to find a firing solution for a given range
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*
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* Arguments:
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* 0: Range to Hit (Meters)<NUMBER>
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* 1: Height To Hit (Meters)<NUMBER>
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* 2: Muzzle Velocity (M/S)<NUMBER>
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* 3: Air Friction <NUMBER>
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* 4: Time Step (seconds) (eg 1/50 will simulate 50 cycles per second) <NUMBER>
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*
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* Return Value:
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* ARRAY - [NUMBER - Elevation In Degrees, NUMBER - Shot Durration]
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*
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* Example:
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* [_rangeToHit, _heightToHit, _muzzleVelocity, _airFriction, TIME_STEP] call FUNC(simulateFindSolution);
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*
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* Public: No
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*/
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#include "script_component.hpp"
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private ["_rangeToHit", "_heightToHit", "_muzzleVelocity", "_airFriction", "_maxElev", "_minElev", "_error", "_solutionElevation", "_lastTestResult", "_numberOfAttempts"];
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#define MAX_ATTEMPTS 22
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_rangeToHit = _this select 0;
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_heightToHit = _this select 1;
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_muzzleVelocity = _this select 2;
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_airFriction = _this select 3;
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_timeStep = _this select 4;
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_maxElev = 90;
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_minElev = 45; //todo - Low Angle Howitzers???
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_error = 10000;
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_solutionElevation = -1;
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_lastTestResult = [];
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_numberOfAttempts = 0;
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//(binary search)
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while {(_numberOfAttempts < MAX_ATTEMPTS) && {(abs _error) > 0.2}} do {
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_numberOfAttempts = _numberOfAttempts + 1;
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_solutionElevation = (_maxElev + _minElev) / 2;
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_lastTestResult = [_solutionElevation, _muzzleVelocity, _airFriction, 15, 1, 0, 0, _heightToHit, _timeStep] call FUNC(dev_simulateShot);
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_error = _rangeToHit - (_lastTestResult select 0);
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if (_error > 0) then {
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_maxElev = _solutionElevation; //test range was short
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} else {
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_minElev = _solutionElevation; //test range was long
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};
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};
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if (_numberOfAttempts >= MAX_ATTEMPTS) exitWith {[]};
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//return the elevation and time required
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[_solutionElevation, (_lastTestResult select 1)]
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