An issue with GetComponent

Questions & Answers
1

I’m in the process of neatening up my scripts to package it all together into one prefab, which basically consists of a main controller, a rocket launch system and some turrets.
So far, I’m working on getting the main controller to find a target and then assign it to the other components. Turrets work, the missile launcher will trigger based on the correct target.

However, the missiles are a different matter. They’re prefabs instantiated from a series of spawn points, and use their own targeting system. I’m attempting instead to pass the target to them from the controller.

In the script for my launcher, I have this:

var missileProjectile : Rigidbody = Instantiate( 
   projectile, slot.position, slot.rotation ); //create clone of projectile at the right position/orientation

  missileProjectile.velocity =
   transform.TransformDirection( Vector3.forward * speed ); //give it some speed

and then I attempt to pass it the target:

missileProjectile.GetComponent(missileHomingScript).missiletarget  = LookAtTarget ;

Where missileHomingScript is the script attached to the prefab, and LookAtTarget is the name of the target.

Unity throws me this error:
Assets/Standard Assets/Scripts/Component Scripts/Weapon Component/multi_missile_launcher_script.js(88,40): BCE0005: Unknown identifier: ‘missileHomingScript’.

I’ve scoured every resource I can find, and I’m pretty certain that the syntax is correct. So why am I getting this error?

2

There’s nothing called “missileHomingScript” that is available to the script when being compiled. Either that’s a typo (the convention is to use capital letters for classes, so I would have called it MissileHomingScript instead), or else it’s a C# script that’s not visible to the JS script (see here).

3

I guess “missileHomingScript” is outside of the “Standard Assets” folder. Scripts in “Standard Assets” are compiled before all “normal” scripts like you can read in Eric’s link. You should either move your “multi_missile_launcher_script” out of “Standard Assets” or put your “missileHomingScript” also in Standard Assets.

I would strongly recommend to move them out of this folder. This folder should only be used for complete script packages that don’t belong on other things. That way they are available to all languages.