Forums > Jitter

cosm and multiplr views

October 12, 2010 | 8:59 am

Hi I’m working on an installation where I have 2 projectors doing a top down projection and need to blend the two images as 1 screen. I’ve been trying to do this by adding some values to reposition the camera and using the COSM externals but can’t seem to figure out what to do, it seems to be wrong somehow

There might also be better way so if someone could enlighten me that would be great

pieter

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October 12, 2010 | 10:08 am

The COSM stuff seems overkill if you just want to do a multi-projection set up. It really depends what you are trying to do, do you want to render normal jitter matrix stuff and movies etc or are you rendering GL stuff, or both?

Search on the forums for ‘multi projector’, ‘multi projection’ and ‘edge blending’ etc and you’ll find tonnes of stuff.


October 12, 2010 | 12:53 pm

Thanks,

I am only drawing gl stuff and figured out the camera positions in 3 separate GL renders, keeping an average fps of 20. I just thought there was an easier way of doing this than draw each jit.gl.object in each of the separate engines


October 12, 2010 | 2:40 pm

So, do you want to capture a gl scene and split it over two projectors?


October 13, 2010 | 4:54 am

actually I want to capture a gl scene and split it over 3 projectors, of which 1 is a combined 2 projector top down and the other is a side view of the same gl scene. This way people can now x/z axis from ground projection and height (y axis)of the gl object they are controlling by looking at the side view.
I guess your hinting at the @capture for the whole scene but I get lost trying to wrap my head around that.

without the cosm it looks like this at the moment:

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October 13, 2010 | 9:01 am

OK, in this situation I use one gl.render and one large window and split the gl.scene across separate planes within the window. I am using a Matrox Triplehead2go so I can create one large desktop to send the window to and that gets split across the three projectors. I’ve pasted a simplified version of what I’m doing to capture the scene (assisted by Mr. Benson!), but it doesn’t take into account getting a side view of your scene and I’ve left some gaps around the edges so you can see what’s going on. Hope it helps some:

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