[GEM-dev] How to change perspective Angle in Gem : WAS gemwin "view" message

[cyrille henry]

hello,

i think you should use more the perspect message than the view message.

try by example :
perspect 0 2 -1 1 1 20
and
perspect -2 0 -1 1 1 20
to create 2 screens that perfectilly connected.

you can also try :
perspect  0 $1 -1 1 1 20
to adjust the lens...

Cyrille



B. Bogart a écrit :
> Hey all,
> 
> Anyhow I tried another approach to my setup so that all the three virtual
> cameras require the same lens, but alas it still does not work since the
> default lens of the camera does not match what I would like.
> 
> A quick run down of what I'm doing:
> 
> I have a (physical) space with three rear-projection screens. I want to
> have three gemwins (on different machines) that each sees the gemworld
> from the view of each of these physical screens. They are fixed in space,
> surrounding a room at angles (see attached filen which shows the view of
> the room from the top). Basically the virtual gem-space is then mapped
> into the physical space on multiple screens. (cave-like, but of course not
> a cube of screens)
> 
> So its easy enough to get the camera to point at the center of each
> virtual screen, but the edges of the screen don't match the edges of the
> gemwin. (in the attached OOo diagram we should see only the red square in
> screen 2, and the green square in screen 3, but both the red and green
> squares are visible in both screen 2 and screen 3.
> 
> Method-A and Method-B slides show the two options for the camera views, in
> option A the camera plane is parallel to the screen plane, but the
> distances  from camera to screen are different. In method-B the camera is
> the same distance from all the screens, but for screen 2 and 3 the camera
> plane is not parallel to the screen plane.
> 
> Also I included a few attached patches:
> 
> virtual-camera-test2 is method-A
> virtual-camera-test3 is method-B.
> 
> I'd really like to get this resolved, since we're hoping to do many
> gem-projects in this space with these three screens...
> 
> Thanks all,
> .b.
> 
> 
> 
> 
> 
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