CEGUI (Crazy Eddie's GUI) Forums

Hello!

I have a GUI that is compound of a reasonable amount of elements.
I have an elements of my GUI which that I refresh zRotation is refreshed each frame (Representing a compass bound to the main camera)
And 2 other buttons that have a fixed rotation on 180 degrees.

I use it in ogre with the ''bootstrapSystem()'' method (very easy to use!), and everything is going fine.

But a problem appears when I go with high resolutions (let say 1920*1080)...
Some elements are flickering a lot: The "live rotating" compass, but although the 2 simple buttons (that have a 180° rotation) and which properties are not changed on each frame...

I found on the forum some thread about flickering, explaining that CEGUI is not refreshing the whole GUI on each frame, but only some dynamic parts...

Do you have some ideas of where the problem could come from, and how to fix it?

Thanx in advance for your help!

See that big red text?

Thank you

CE

yes, nice color!

Indeed, I have no error or exception messages in my log. and i didn't mean to spam the forum with my big log.

My app is running good, except that when I exceed a certain resolution, the elements that have a "rotation" property" start to flicker.

You might not see anything wrong with the log, that doesn't necessarily mean that someone else might not see something wrong with it... Ignoring a direct request like this is a not good form IMO

If anything it will give us an idea of render system and versions... Post ogre.log as well.

Thanx Eddy and Kulik for the answers


So here are my logs:
This is the Ogre Log:


And this is the CEGUI Log:


It seems that the key could be here, in the lasts lines of the CEGUI.log:

The is the element that give a problem of flickering (a Compas that is giving the scene orientation, and that is a CEGUI/StaticImage which rotation is updated on each frame.

Thanx in advance for your help

I understand that you're probably not going to be able to test this, but do you get the same results if you use the OpenGL render system in Ogre? I appreciate that depending on the project you're working on, that may not be a realistic thing to ask. Neither of the main CEGUI devs test on Windows all that often, and I think the CEGUI Ogre renderer using the D3D render systems gets tested even less (read: almost not at all) - so it's possible issues are local to that particular configuration.

I would guess - but I can't be completely certain - that this flickering is a render to texture sequence issue of some kind - whereby operations relating to rendering to texture are being performed out of sequence, thus allowing you to see some of that occurring - hence the flicker. A lot of the reason I suspect this is that CEGUI's rendering to texture occurs outside of the normal time when Ogre handles that kind of thing (Ogre likes to call all the shots, and unfortunately that's not 100% compatible with the way CEGUI renders). Normally this is not an issue, but there are cases where - depending on the render to texture technique employed - some problems arise: this usually involves techniques where rendering can not be performed directly to the texture, but is instead rendered to the display buffer and then copied to the texture afterwards (it's usually evidenced by a second copy of some windows flickering in a corner of the display).

Whether this is actually the issue you're getting I have no idea at all, since I've not seen the issue What I can't really explain at all is why this would only happen at really high resolutions. I can't personally test 1920x1080 resolutions as 1650x1050 is my max. If the issues occur at that resolution too, I would ask that a minimal test case be provided so we could investigate the issue further and hopefully find a cause and satisfactory solution.

CE.