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convert GameObject to Rigidbody type


When I find a game Object like this:


If I try to assign it to a variable that is typed as Rigidbody, it fails.

There is a rigidbody component applied to this model yes, and If I use the inspector it all works fine.

I get the following:

BCE0022: Cannot convert 'UnityEngine.GameObject' to 'UnityEngine.Rigidbody'.

Note that it works very well within the inspector, but how can I do the same via script? there is a conversion going on somewhere but I fail to find how to do that within a script.

How should I go about it?



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asked Aug 18, 2010 at 12:17 PM

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Jean Fabre
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2 answers: sort voted first

A GameObject and a Rigidbody are two entirely different types, so you cannot assign one to the other. As you find out, you have to get the Rigidbody component from the GameObject instead, ie:

joint.connectedBody = GameObject.Find("physics_body").rigidbody;

The reason you can do this in the inspector is that the inspector is smart, and if you drag a GameObject onto a component reference, it will automatically search the GameObject for matching components to assign. As you cannot drag a component itself, this is also needed to have an easy way to assign component references in the editor.

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answered Aug 19, 2010 at 09:52 AM

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jonas echterhoff ♦♦
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Found it after messing around desperately

you actually pass the component reference itself.

something like this:

<joint>.connectedBody = <GameObject>.GetComponent(Rigidbody);

Simple. Maybe it's in the doc somewhere, but I would say it would deserve a bit more explanation or examples on this.

Oddly enough, passing the right value solved other problems that at first seemed unrelated, I was getting errors about the connectedBody function itself, not the fact that the value passed was of the wrong type. see http://answers.unity3d.com/questions/18378/connectedbody-error-when-used-in-script


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answered Aug 18, 2010 at 12:49 PM

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Jean Fabre
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How could I use this in C#?

Apr 10, 2014 at 10:48 PM JuanseCoello
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asked: Aug 18, 2010 at 12:17 PM

Seen: 5227 times

Last Updated: Apr 10, 2014 at 10:48 PM