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49 lines
1.4 KiB
Plaintext
49 lines
1.4 KiB
Plaintext
#include "script_component.hpp"
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/*
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* Author: commy2
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* Adjust a projectiles velocity and dir + up vector.
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*
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* Arguments:
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* 0: Projectile <OBJECT>
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* 1: Adjust azimuth this much. <NUMBER>
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* 2: Adjust inclination this much. <NUMBER>
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* 3: Adjust projectile speed this much. In m/s. (optional: 0) <NUMBER>
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*
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* Return Value:
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* None
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*
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* Example:
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* [bullet, 2, 5, 3] call ace_common_fnc_changeProjectileDirection
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*
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* Public: No
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*/
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params ["_projectile", "_adjustDir", "_adjustUp", ["_adjustSpeed",0]];
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// get old direction vector
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private _vdir = vectorNormalized velocity _projectile;
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// get azimuth and inclination and apply corrections
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private _dir = (_vdir select 0) atan2 (_vdir select 1) + _adjustDir;
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private _up = asin (_vdir select 2) + _adjustUp;
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// get new direction vector (this is a unit vector)
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_vdir = [
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sin _dir * cos _up,
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cos _dir * cos _up,
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sin _up
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];
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// get best up vector
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private _vlat = vectorNormalized (_vdir vectorCrossProduct [0,0,1]);
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private _vup = _vlat vectorCrossProduct _vdir;
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// get new speed vector. Keep total speed, but change to new direction. Yay for vector commands.
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private _vel = _vdir vectorMultiply (_adjustSpeed + vectorMagnitude velocity _projectile);
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// set projectile direction dir and up. Projectiles are long objects, especially with tracers, so it would look dumb otherwise.
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_projectile setVectorDirAndUp [_vdir, _vup];
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// set new speed vector
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_projectile setVelocity _vel;
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