3d Object in GUI Layer

Question

Is it possible to put a 3D Object on the GUI Layer?

I made a life bar out of 3D heart shapes. I scripted them and added them as a GameObject. Then I parented the heart GameObjects to the mainCamera. It works fine but there are some flaws with this approach. I have to manually position the hearts for each scene.

Is it possible to put the heart GameObjects on the GUI Layer instead? It would be a simpler approach.

Answer 1

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Answer by flaminghairball · Jun 07, 2011 at 02:06 PM

You have a couple of options:

1) If you have Pro, you can use a rendertexture. 2) If you don't have Pro, you can put the hearts in another layer that is blocked on the main camera, and then use a secondary camera to render the hearts. Take a look at the 'normalized viewport' and culling options of the camera class.

Let me know if this is unclear.

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jb777 · Jun 07, 2011 at 03:25 PM 0

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Thanks. Got it working. Never thought to use more than one camera.

Chris D · Jun 07, 2011 at 03:47 PM 0

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Why the need for the second camera? Couldn't you just parent the hearts directly to the main one and create a prefab out of it (to avoid repositioning every time), or is that the problem?

flaviusxvii · Jun 07, 2011 at 03:50 PM 0

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You could do that too.. but you'd need to carefully control render order, and probably either disable depth testing or clear the depth buffer before drawing the hearts.

Chris D · Jun 07, 2011 at 04:04 PM 0

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Ah, ok, I think I understand now. Looking at the camera documentation, it seems there's a lot there to learn :D

flaviusxvii · Jun 07, 2011 at 04:07 PM 0

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As much as there is Unity is still like a big fluffy cloud of joy compared to really doing it yourself. I've implemented cameras and quaternions and transforms and whatnot. It's a great learning experience but it's nice to have all this great stuff more or less solid and ready to go.

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Answer 2

Answer by flaviusxvii · Jun 07, 2011 at 02:06 PM

I'd render them with a second camera. Give it a limited viewport and disable any kind of screen clearing. It'll just draw the hearts over the top of whatever you have on your screen.

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jb777 · Jun 07, 2011 at 03:27 PM 0

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Thanks. Wish I could give out two check marks but FlamingHairball's answer had a bit more info.

flaviusxvii · Jun 07, 2011 at 03:52 PM 1

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No problem. I don't ever really give detailed answers. I just like to steer people towards what they need to learn to solve their own problems.

3d Object in GUI Layer

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