[Opensg-users] incorrect viewport size with clustering code?

[Gun A. Lee]

Hi OpenSG users,

This is my first time posting here.

I am trying to construct a tiled projection display, and was working with the 
OpenSG's clustering tutorial.
While working, I've found out the viewport size on a single "cluster server" 
seems to be odd.

'In each cluster server, the top most line and the right most line of pixels 
are not rendered and remained black.'

Especially, this occurs when the window size is set to 1024x768, whether it 
runs in full screen or not.
I forced to fill the whole window with an OpenGL glClear() function with 
setting the clear color to yellow before calling the OpenSG render function in 
the "cluster server code", and as I worried, the top and right edges appeared 
yellow.
To make it sure, I tried with nVIDIA GeForce 6600 and nForce 3000 and they both 
suffered with the problem.

One thing really odd is, this doesn't happens when the screen size is set to 
800x600.

It seems to be some kind of round up problems when calculating the viewport 
size.

Does anybody have idea to correct this?


Gun.
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