---

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<!-- Index for DEF nodes: AnimationControl, AnimationTransform, artyRound, BALLSIZE, BallTransform, barrel, barrelCover, barrelGroup, barrelMover1, basePlate, basePlateClamp, betweenTrails, black, BOOMCLOCK, BoomMaterial, BoomTimer, BoomTransform, BoxDownTimer, BoxUpTimer, brakeResevoir, breech, ButtonChoice, cami, camiPaint, camo, CannonFireSound, carriage_sensor, CircularHandle, clamp, ClearSphere, ClearSphere1, ClearSphere2, CLOCK, clock3, connectingCylinder, Crank, CrankShaft, downBarrel, elevatingMech1, elevMechMover1, ExampleViewPositionOrientation, explosion, explosionSound, explosionSounds, explosionsoundsensor, EXPSHAPE, fireMe, fireTheRound, handwheelGroup, hotGas, lbasePlateClamp, left_stantion, leftHandwheel, leftRim, leftSideBar1, leftSpade, leftTire, leftTrail, leftTrailMover, leftWheel, leftWheel1, linkBolt, LowerCar, LowerCarriage1, lowerElevMechExtender, lTrailSpreader, lTravelLockAnchor, M198_Howitzer, MoveBoxDown, MoveBoxUp, muzzle_break, muzzleBreak, recoil, recoilMover, RECOILTIMER, recoilTransform, rideTheRound, rightHandwheel, rightRim, rightSideBar, RightSpade, rightTire, RightTrail, rightTrailMover, rightTrunion, rightUpperCylinder, rightWheel, rightWheel1, rim, rotateUpperCarriage, roundOrientationInterpolator, roundPathInterpolator, roundSpinner, ruc, rucL, rucR, rWheelLift, ScaleInterp, SetBoxDown, SetBoxUp, Shaft, shiny, shinyPiece, shootRound, shotEffects, shrinkCylinder, shrinkCylinderR, sideBar, sideBars, sideView, sideViewClose, sign, spade, spinTimer, StrutOne, Struts, StrutThree, StrutTwo, target, targetSphere, theBarrel, theGround, theRound, theRoundSpinner, tire, Top, TopBall, trail, trailSpreader, TransparencyInterp, Transparent, travelLock, travelLockAnchor, travelLockClock, travelLockOrient, travelLockOrientor, travelLockPiece, travelLockSensor, traversingPlatform, traversingWheel, tube, tube1, tubeSensor, underTube, upperCarriage, upperCarriagePiece, upperCylinder1, upperCylinderMover, upperExtender, upperTravelLocker, wheelDown, wheelInterpolator, wheelLift, wheelRaiser, wheelSensor, wheelUp

Index for Viewpoint nodes: betweenTrails, downBarrel, rideTheRound, sideView, sideViewClose, target, underTube

Index for ExternProtoDeclare definition: ViewPositionOrientation

              
ecmascript:

function barrelRotation (value, eventTime ) {
	angle = value[3];
	outputAngle = .75 * angle;
	upperRotation = new SFRotation ( 0, 1, 0, outputAngle);
	extendCylinder = new SFVec3f ( 0, .22 + (-.7 * angle), 0);	
	shrinkCylinder = new SFVec3f (1, 1.02 * (.85 - angle), 1);
}