Re: [osg-users] Stuck with applying an offset to projection matrix

2018-06-25 Thread Robert Osfield
Hi Werner, Using a ABSOLUTE_RF for a backgrouind image is a simply way of implementing this type of feature but has it's limitations - it means it won't work with anything other than a single window. If you plan to have a view that can be composed of multiple viewport/windows then the

Re: [osg-users] Stuck with applying an offset to projection matrix

2018-06-25 Thread Werner Modenbach
Hi Robert, from your question I guess, I have a fundamental misunderstanding. But from all the examples and from the OGS book I learned as follows: If I want to show a hud I have to do it with a hud camera which has reference frame ABSOLUTE_RF. The same if I want to have a wallpaper in the

Re: [osg-users] Stuck with applying an offset to projection matrix

2018-06-25 Thread Robert Osfield
Hi Werner, What are you using the ABSOLUTE_RF Camera's for? My guess this is the source of the problems, perhaps the approach you've take with this works fine for a single viewport but breaks any form of multi-viewport/window composition of the view. Could you explain what the ABSOLUTE_RF

Re: [osg-users] Stuck with applying an offset to projection matrix

2018-06-25 Thread Werner Modenbach
Hi Robert, thanks for the quick reply. What I actually need is a very high resolution screenshot from a standard scene with some objects displayed like bacxkground, HUD etc. You are right in viewing at it like a powerwall with those objects being spread over all screens. I can easily get the

Re: [osg-users] Stuck with applying an offset to projection matrix

2018-06-25 Thread Robert Osfield
HI Werner, It sounds like you are trying to resolve a problem at the low level which you have created by setting things up incorrectly and the top level. So.. what you need to do is change how you are configuring things at the top level. You don't clearly explain what task you are trying to

[osg-users] Stuck with applying an offset to projection matrix

2018-06-25 Thread Werner Modenbach
Hi all, I'm experimenting with slave cameras for a while now and now I'm totally stuck. I'm doing a tiled display of a scene and for the main scene graph it works fine with projection offset matrix on the slave cameras and all cameras having a RELATIVE reference frame. But my scene also has