"MyCastle" Tutorial from 2D Game Building Book / problem with deathray start position

How do I get the deathray to look like it is fireing from mounted raygun rather than the flying bat holding the ray gun?

The following code does everything right except the deathray shoots from the flying bat rather than mounted gun.


function BattyPlayer::onLevelLoaded(%this, %scenegraph)
{
$BattyPlayer = %this;

moveMap.bindCmd( keyboard, "up", "BattyPlayerUp( );" , "BattyPlayerUpStop( );");
moveMap.bindCmd( keyboard, "down" , "BattyPlayerDown( );" , "BattyPlayerDownStop( );");
moveMap.bindCmd( keyboard, "left" , "BattyPlayerLeft( );" , "BattyPlayerLeftStop( );");
moveMap.bindCmd( Keyboard, "right" , "BattyPlayerRight( );" , "BattyPlayerRightStop( );");
moveMap.bindCmd( Keyboard, "space" , "BattyPlayerBoost( );" , "BattyPlayerBoostStop( );");
moveMap.bindCmd( keyboard, "numpad0" , "$BattyPlayer.createDeathray( );", "");
%this.isDead = false;
%this.startX = %this.getPositionX( );
%this.startY = %this.getPositionY( );
}

function BattyPlayer::updateMovement(%this)
{
if(%this.moveUp)
{
$BattyPlayer.setLinearVelocityY(-$BattyPlayer.vSpeed);
}

if(%this.moveDown)
{
$BattyPlayer.setLinearVelocityY($BattyPlayer.vSpeed);
}

if(%this.moveLeft)
{
$BattyPlayer.setFlipX(true);
$BattyPlayer.setLinearVelocityX(-$BattyPlayer.hSpeed);
}

if(%this.moveRight)
{
$BattyPlayer.setFlipX(false);
$BattyPlayer.setLinearVelocityX($BattyPlayer.hSpeed);
}

if(!%this.moveLeft && !%this.moveRight)
{
%this.setLinearVelocityX(0);
}

if(!%this.moveUp && !%this.moveDown)
{
%this.setLinearVelocityY(0);
}

}

function BattyPlayerUp( )
{
$BattyPlayer.moveUp = true;
$BattyPlayer.updateMovement( );
}

function BattyPlayerDown( )
{
$BattyPlayer.moveDown = true;
$BattyPlayer.updateMovement( );
}


function BattyPlayerLeft( )
{
$BattyPlayer.moveLeft = true;
$BattyPlayer.updateMovement( );
}

function BattyPlayerRight( )
{
$BattyPlayer.moveRight = true;
$BattyPlayer.updateMovement( );
}


function BattyPlayerUpStop( )
{
$BattyPlayer.moveUp = false;
$BattyPlayer.updateMovement( );
}

function BattyPlayerDownStop( )
{
$BattyPlayer.moveDown = false;
$BattyPlayer.updateMovement( );
}

function BattyPlayerLeftStop( )
{
$BattyPlayer.moveLeft = false;
$BattyPlayer.updateMovement( );
}

function BattyPlayerRightStop( )
{
$BattyPlayer.moveRight = false;
$BattyPlayer.updateMovement( );
}

function BattyPlayerBoost( )
{
%flipX = $BattyPlayer.getFlipX( );
if(%flipX)
{
%hSpeed = -$BattyPlayer.hSpeed * 3;
}
else
{
%hSpeed = $BattyPlayer.hSpeed * 3;
}

$BattyPlayer.setLinearVelocityX( %hSpeed );

}

function BattyPlayerBoostStop( )
{
$BattyPlayer.setLinearVelocityX(0);
}

function BattyPlayer::explode( %this )
{
%this.isDead = true;
%this.setEnabled( false );
%this.schedule( 2000, "spawn" );
}

function BattyPlayer::spawn( %this )
{
%this.isDead = false;
%this.setPosition( %this.startX, %this.startY );
%this.setEnabled( true );
}

/////////////////////////////////////////////////////////////////////////////////////////////////////////
function BattyPlayer::createDeathray( %this )
{
if( !%this.isDead)
{
%this.playerDeathray = new t2dStaticSprite( )
{
scenegraph = %this.scenegraph;
class = playerDeathray;
missileSpeed = %this.missileSpeed;
player = %this;
};
%this.playerDeathray.fire( );
}
}

function playerDeathray::fire( %this )
{
%this.setWorldLimit( kill, "-240 -180 240 180");
%this.setLinearVelocityX( %this.missileSpeed );
%this.setPosition( %this.player.getPosition( ) );
%this.setImageMap( deathrayImageMap );
%this.setSize( 50, 20 ); //aprox half size of original graphic
%this.setCollisionActive( true, true );
%this.setCollisionPhysics( false, false );
%this.setCollisionCallback( true );
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////


function playerDeathray::onCollision( %srcObj, %dstObj, %srcRef, %dstRef, %time, %normal, %contactCount, %contacts)
{
if( %dstObj.class $= "enemyGhost" )
{
%srcObj.explode( );
%dstObj.explode( );
}
}

function playerDeathray::explode( %this )
{
%this.safeDelete( );
}

function enemyGhost::explode( %this )
{
%this.spawn( );
}