Time for action – Accessed None in function parameters

Even when we're using functions, we have to be careful about Accessed None warnings. Just because a function is passing an actor in doesn't mean it's a valid reference.

1. Let's remove our MyProjectile variable and rewrite the PostBeginPlay function:

   simulated function PostBeginPlay()
   {
       AdjustProjectile(none);
   }

2. Now let's write the custom AdjustProjectile function:

   function AdjustProjectile(Projectile MyProj)
   {
       `log("MyProj:" @ MyProj);
       MyProj.Speed = 1000.0;
   }

3. Compile the code and run the game.

4. Exit and take a look at the log. We're getting the same warnings as before:

   [0005.09] ScriptWarning: Accessed None 'MyProj'
   	BrokenActor BrokenMap.TheWorld:PersistentLevel.BrokenActor_0
   	Function BrokenGame.BrokenActor:AdjustProjectile:0024
   [0005.09] ScriptWarning: Attempt to assign variable through None
   	BrokenActor BrokenMap.TheWorld:PersistentLevel.BrokenActor_0
   	Function BrokenGame.BrokenActor:AdjustProjectile:0038

What just happened?

In...