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Question by gardnedn · Jun 16, 2014 at 07:21 PM · camerafieldofviewfrustrum

How to cut a camera view in half

How do you get a camera to only see what's at its height or above it? Thanks, appreciate any help

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avatar image Maerig · Jun 17, 2014 at 02:43 AM 0
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Is the Depth$$anonymous$$ask what you're looking for ?

avatar image KillerStarBunny · Jun 17, 2014 at 02:48 AM 0
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Why do you want this?

avatar image pstreef · Jun 17, 2014 at 07:09 AM 0
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Your question is missing a lot of information to get the answer you're looking for. Perhaps you can post an image of what you would like to achieve? Cause rotating your camera upwards would in theory do what you ask for but I am presu$$anonymous$$g here this is not what you want..

avatar image tomekkie2 · Jun 17, 2014 at 07:26 AM 0
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So this would be like horizontal clipping planes. You could do that with shaders. http://forum.unity3d.com/threads/simple-cross-section-shader.34508/ Or using a tool similar to one I've created here: http://forum.unity3d.com/threads/released-crosssection-tool.223790/

avatar image gardnedn · Jun 17, 2014 at 03:49 PM 0
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Hey guys, i'll try to give more detail. So i'm trying to use this for projection mapping. I need to get the in game camera to see light exactly like a real world projector so when I use a projector on a real object it will show the in game scene on that object. So the problem is that unity cameras see like a pyramid co$$anonymous$$g out of its lens while real world projects kind of angle up like below. I need to rotate the camera frustum or remove the bottom half of it.

alt text

home_theater_projector.jpg (27.3 kB)

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Answer by Loius · Jun 17, 2014 at 05:58 PM

You need to change the camera's projectionMatrix.

This is math and this is all the help I can be: google search

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