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55 lines
1.5 KiB
Plaintext
55 lines
1.5 KiB
Plaintext
/*
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* Author: commy2
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*
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* Adjust a projectiles velocity and dir + up vector.
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*
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* Argument:
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* 0: Projectile (Object, CfgAmmo)
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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. (Number, optional default: 0 m/s)
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*
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* Return value:
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* None.
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*/
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#include "script_component.hpp"
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private ["_adjustSpeed", "_vdir", "_dir", "_up", "_l", "_r", "_vup", "_vel", "_vlat"];
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PARAMS_3(_projectile,_adjustDir,_adjustUp);
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_adjustSpeed = if (count _this > 3) then {
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_this select 3
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} else {
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0
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};
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["CPD", [_fnc_scriptNameParent, _adjustDir, _adjustUp, _adjustSpeed], nil, false] call FUNC(log);
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// get old direction vector
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_vdir = vectorNormalized velocity _projectile;
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// get azimuth and inclination and apply corrections
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_dir = (_vdir select 0) atan2 (_vdir select 1) + _adjustDir;
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_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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_vlat = vectorNormalized (_vdir vectorCrossProduct [0,0,1]);
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_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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_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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