----------------- Part 4 - Section 1 ----------------- 


Code Sample 4.1.1

"
function enemyShip::onLevelLoaded(%this, %scenegraph)
{
  %this.enemyMovement();
}

function enemyShip::enemyMovement(%this)
{
   %this.setLinearVelocityX(getRandom(%this.minSpeed, %this.maxSpeed));
}
"




Code Sample 4.1.2

"
exec(“./enemy.cs”);
"




Code Sample 4.2.1

"
function enemyShip::onLevelLoaded(%this, %scenegraph)
{
  %this.startX = %this.getPositionX();
  %this.spawn();
}
"




----------------- Part 4 - Section 2 ----------------- 


Code Sample 4.2.2

"
function enemyShip::onWorldLimit(%this, %mode, %limit)
{
    if(%limit $= "left")
    {
       %this.spawn();
    }
}
"




Code Sample 4.2.3

"
function enemyShip::spawn(%this)
{
    %this.setLinearVelocityX(getRandom(%this.minSpeed, %this.maxSpeed));
    %this.setPositionY(getRandom(%this.minY, %this.maxY));
    %this.setPositionX(%this.startX);   
}
"




Code Sample 4.2.4

"
function enemyShip::onLevelLoaded(%this, %scenegraph)
{
  %this.startX = %this.getPositionX();
  %this.spawn();
}

function enemyShip::onWorldLimit(%this, %mode, %limit)
{
    if(%limit $= "left")
    {
       %this.spawn();
    }
}

function enemyShip::spawn(%this)
{
    %this.setLinearVelocityX(getRandom(%this.minSpeed, %this.maxSpeed));
    %this.setPositionY(getRandom(%this.minY, %this.maxY));
    %this.setPositionX(%this.startX);   
}
"