object vehicle_weapon_plasmacannon : vehicle_weapon_base {
	void			preinit();
	void			init();
	void			Fire();

	void			UpdateCharge();

	string			muzzleFlashFX;

	float			spread;
	float			projectileIndex;

	float			spreadSiege;
	float			chargePerUseSiegeScale;

	float			jointHandle;
	float			jointHandleParent;
	float			feedback;
	float			baseChargeMax;

	vector			velocity;
};

void vehicle_weapon_plasmacannon::preinit() {
	projectileIndex		= GetEntityDef( getKey( "def_projectile" ) );

	entity vehicle		= getVehicle();
	jointHandle			= vehicle.getJointHandle( getKey( "muzzle" ) );
	jointHandleParent	= vehicle.getJointHandle( getKey( "muzzle_parent" ) );

	muzzleFlashFX		= getKey( "muzzle_flash" );

	spread				= getFloatKey( "spread" );
	velocity			= getVectorKey( "velocity" );
	feedback			= getFloatKey( "feedback" );
	
	spreadSiege			= getFloatKey( "spread_siege" );
	chargePerUseSiegeScale	= getFloatKey( "charge_per_use_siege_scale" );
	baseChargeMax		= getFloatKey( "charge_max" );

}

void vehicle_weapon_plasmacannon::init() {
}

void vehicle_weapon_plasmacannon::Fire() {

	vector origin = myVehicle.getJointPos( jointHandle );
	boolean allowFire = true;
	
	if ( jointHandleParent != INVALID_JOINT ) {
		vector muzzleCheckOrigin = myVehicle.getJointPos( jointHandleParent );		
		if ( sys.tracePoint( muzzleCheckOrigin, origin, MASK_PROJECTILE, myVehicle ) != 1.f ) {
			allowFire = false;
		}
	}


	if ( allowFire ) {
		float spreadActual = spread;
		if ( myVehicle.inSiegeMode() ) {
			myVehicle.startSound ( "snd_recharge_2s", SND_VEHICLE_INTERIOR_POWERUP );
			spreadActual = spreadSiege;
		}
		else { 
			myVehicle.startSound ( "snd_recharge_4s", SND_VEHICLE_INTERIOR_POWERUP );
		}
		
		RemoveCharge();

		myVehicle.launchMissileSimple( user, myVehicle, $null_entity, projectileIndex, -1, spreadActual, origin, myVehicle.jointToWorldSpace( jointHandle, velocity ) );
		myVehicle.applyImpulse( origin, -feedback * myVehicle.getJointAxis( jointHandle, 0 ) );
		myVehicle.playJointEffect( muzzleFlashFX, jointHandle, 0 );
	} else {
		// Gordon: FIXME: Play error sound/tooltip
	}
		
	GoToIdle();
}

void vehicle_weapon_plasmacannon::UpdateCharge() {
	float percentChargeUsed = CalcChargeUsed() / chargeMax;

	chargePerUse = userChargePerUse;
	chargeMax = baseChargeMax;
	if ( myVehicle.inSiegeMode() ) {
		chargePerUse = chargePerUse * chargePerUseSiegeScale;
		chargeMax = chargeMax * chargePerUseSiegeScale;
	}

	// recalculate the charge time to be the same %
	chargeTime = sys.getTime() + chargeMax * percentChargeUsed;

	UpdateCharge_Base();
}