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Question by Jessy · Oct 05, 2010 at 09:15 PM · type

How can you store a Type for future use?

I'd like to do something like this...

System.Type colliderType = ColliderTypeFromName(); if (colliderType != null) gameObject.AddComponent<colliderType>();

System.Type ColliderTypeFromName () { if (name.Contains("box")) return typeof(BoxCollider); if (name.Contains("sphere")) return typeof(SphereCollider); if (name.Contains("capsule")) return typeof(CapsuleCollider); return null; }

...but AddComponentcolliderType() doesn't work. What would work instead?

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Answer by burnumd · Oct 05, 2010 at 09:29 PM

Generics don't take a System.Type type, per se. As best as I can tell from the MSDN docs, it's actually a "type parameter" or "template." There's a fairly in-depth discussion on this Stack Overflow question on the topic. To get around that, though, you can change your AddComponent call to the non-generic type (which does take a System.Type argument) and it seems to work OK:

System.Type colliderType = ColliderTypeFromName();
if (colliderType != null) gameObject.AddComponent (colliderType);
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avatar image Jessy · Oct 05, 2010 at 10:31 PM 0
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Unfortunately, this was just a simplification. I need to use colliderType as the type for my own generic method.

avatar image Mike 3 · Oct 05, 2010 at 11:32 PM 0
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That's not really how generics work. The types have to be resolved at compile time, so passing a System.Type isn't going to be viable.

avatar image Jessy · Oct 06, 2010 at 01:34 AM 0
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Oh, I realize my code is not the right way of going about things, but I believe it expresses my intent.

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Answer by Lucas Meijer 1 · Oct 05, 2010 at 10:58 PM

this would work:

System.Type colliderType = ColliderTypeFromName();
gameObject.AddComponent(colliderType);

that said, this code does smell a bit, and I suspect that if you provide a bit more context of the problem you're trying to solve, a more elegant solution would be available.

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avatar image Jessy · Oct 05, 2010 at 11:30 PM 0
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I want to avoid having to have "Change$$anonymous$$eshTo(t, meshFilter);" multiple times in this code. I'd also like to share ColliderTypeFromName in the validation function.

http://www.unifycommunity.com/wiki/index.php?title=$$anonymous$$esh2Collider#C.23_-_$$anonymous$$esh2Collider$$anonymous$$enu.cs

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