llw_getShootVector = {
	params ["_object","_pitchUp","_shootDir"];
	private ["_vector"];

	// calculate barrel vector at 0 deg. object angle
	_vector =
	[	(cos _pitchUp) * (sin _shootDir),
		(cos _pitchUp) * (cos _shootDir),
		(sin _pitchUp) ];

	vectorNormalized (_vector vectorAdd vectorUp _object)
};


llw_shoot = {
	params ["_objShooter","_barrelpitch","_barreldir","_shellType","_charge"];
	private ["_barrelHeight","_milsPerDegree","_pitch","_spawnPoint","_objShell","_fireVector"];


	// magic numbers
	_milsPerDegree = 17.777777;

	// preparatory calculations
	// TODO: change spawnpoint function to barrel exit vertex
	_muzzleHeight = 2;
	_spawnPoint = position _objShooter;
	_spawnPoint set [2, _muzzleHeight];
	_vector = [_objShooter,_barrelpitch / _milsPerDegree,_barrelDir] call llw_getShootVector;

	// spawn and launch
	_objShell = _shellType createVehicle _spawnPoint;
	_objShell setVectorDirAndUp [_vector,_vector];
	_objShell setVelocity (_vector vectorMultiply _charge);
	_objShell

	/* hint (["Variables"
		,"\nObject", _objShooter
		,"\nBarrelpitch",_barrelpitch
		,"\nBarreldir",_barreldir
		,"\nShelltype",_shellType
		,"\nSpawnPoint",_spawnPoint
		,"\nVector",_vector
		,"\nobjShell",_objShell
		] joinString " : "); */

};

/////////////////////////////////////////////
// AFTER THIS BLOCK, ONLY FOR TESTING
/////////////////////////////////////////////
arty = vehicle player;
player allowDamage false;
arty allowDamage false;

onEachFrame
{
	_beg = ASLToAGL eyePos arty;
	_endE = (_beg vectorAdd (eyeDirection arty vectorMultiply 100));
	drawLine3D [ _beg, _endE, [0,1,0,1]];
	_endW = (_beg vectorAdd (arty weaponDirection currentWeapon arty vectorMultiply 100));
	drawLine3D [_beg, _endW, [1,0,0,1]];
};

// shell = [ arty, 45, direction arty, "LLW_81mm_HEPD_004", 1 ] call llw_shoot;
shell = [ arty, 45, direction arty, "Sh_82mm_AMOS", 10 ] call llw_shoot;

hint str velocity Shell;