Discussions on Saga3D renderer development

[manhnt]

Hi, I'm implementing a renderer and have some questions. Hope that you guys can help me answer it.

- When is a RenderTarget (RT) created?
- Is it true that there're only 1 RT for the whole runtime that CEGUI draws to?
- If there're multiple RT, what is each RT associated with: geometry buffer, effect, ... etc ?

I personally think that there's just 1 render target that CEGUI renders to and present that surface.
So there're multiple geometry buffers (GUI Elements) are drawn into that RT each frame and there is no second RT.

[manhnt]

I figured out that each window has a RT, so there're multiple RT.
Then when having multiple windows, how can the root window displays all other children windows?
Where do I look for code that collects all children window's render target and composite to the main window?

[Ident]

By default we render to one target but you can have multiples: This might help http://cegui.org.uk/wiki/Rendering_to_texture_(RTT)_in_CEGUI

[manhnt]

Thanks Ident, I'll refer to it.
Since I won't create new topic for every problem I meet (that may flood the forums), I changed this thread's title.

My current problem is that CEGUI behaves inconsistently on feeding geometry buffer for different renderers.
Here is my test video: https://www.youtube.com/watch?v=CJZ5v6ZdjVM