[PD] GEM camera angle-of-view >180deg

Cyrille Henry ch at chnry.net
Sat Apr 14 19:13:21 CEST 2012

Le 14/04/2012 18:47, Marian Weger a écrit :
> ok, i now can give some answers myself:
>> Is it somehow possible to get a 360 degree angle-of-view with the GEM camera inside a framebuffer?
>> I just noticed, that the camera clips at 180deg (using the "perspec" message).
>> That means, outside 180deg nothing but the background color is rendered.
> The camera in GEM is an "ideal" camera, which has no angle, but only a size.
> So it is technically not possible to get more than 180 degrees.
>> I then tried to build a virtual multi-camera system using two framebuffers with 180deg camera angle each.
>> But apparently the camera direction inside the framebuffer is fixed and can not be set. Or can it somehow?
> The same result can be achieved by rotating the content.
> So, my new multi-camera approach is as follows:
> I connect my content to three framebuffers (At the second one, everything gets rotated by 120deg, and at the third one by 220 deg). Then I stitch these three parts together to one continuous video using Extended View Toolkit.
> My new question:
> Isn't there some easy way to do the same thing?

have you seen the example 10.example/13.panoramic?
replacing images by frambuffer information would allow an easier stitching to a big panoramic image.


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