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up vote -2 down vote favorite

I am trying to reference a class that is outside my unity script using GetComponent.

private FlyThroughCamera camera;

void Start () 
{
    camera = GetComponent(typeof(FlyThroughCamera)) as FlyThroughCamera;
    camera.DoSomething();
}

Although the class exists the cast is failing and returning null.

The other class is defined as:

public class FlyThroughCamera : MonoBehaviour

Where have I gone wrong?

EDIT:

Linked FlyThroughCamera

share|improve this question
    
Are you sure you have added the FlyThroughCamera component to your gameobject? –  nathan Jan 12 '14 at 16:04
    
Also no need to tag this with unityscript since it seems you are using C# : ) –  nathan Jan 12 '14 at 16:12
    
I have added the FlyThroughCamera on my GameObject in the inspector but the cast will revert it to null. If I delete the cast code then I will get a warning about hiding inherited members because it is not instantiated in any way. –  user1423893 Jan 12 '14 at 16:25
    
If you just log the return of your GetComponent call without the cast, what does it print? –  nathan Jan 12 '14 at 16:43
1  
You do not have any FlyThroughCamera component. I think you are misunderstanding the basics of Unity3D. –  nathan Jan 12 '14 at 16:56

1 Answer 1

up vote 0 down vote accepted

I would caution against shadowing the MonoBehaviour.camera field.

I recommend the generic form of GetComponent().

private FlyThroughCamera flyCamera;

void Start () 
{
     flyCamera = GetComponent<FlyThroughCamera>();
     flyCamera .DoSomething();
}
share|improve this answer
    
GetComponent still returns null, even though the class exists and is linked via the Inspector window. –  user1423893 Jan 12 '14 at 16:27
    
That's strange?... It might help if you add a screenshot of the inspector to your question. –  Kelly Thomas Jan 12 '14 at 16:30
    
I have added a screenshot as requested. –  user1423893 Jan 12 '14 at 16:41
1  
There is no FlyThroughCamera component on that game object! getComponent() will return null if unable to find a component of the specified type. –  Kelly Thomas Jan 12 '14 at 16:53
1  
You have however already defined a value for your camera variable, so just remove the GetComponent() line and it should work. –  Kelly Thomas Jan 12 '14 at 16:55

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