globe with LOD and objects on it.

[elfuz]

Hi All

I'm having some issues finding the way to go.

I want to have a 3d globe inside a GUI.

The globe should have multiple levels of detail.

So what i've thought about is dividing the the globe in 32 pieces.

then i'd have
32 textures 128*128.
32 textures 256*256.
32 textures 1024*1024.

Can i do this with a standard globe i'm adding to the scenenode or should i use a model for this?

Also when the zoom is closer, it should load higher res textures for the visible parts. How can i find out what texture needs to be loaded in higher res (ie. what part is visible). However i want to keep the lower res-images of the other parts loaded in case the globe zooms out again, so it doesnt have the overhead of loading and unloading unneccessary textures.

Any idea how i can accomplish this or in what direction i need to look?

Also i need to have images/models on the globe at a dynamic position. How can i add them at a certain position (for example 40 degrees north, 60 west).

greetings
elFuz

[Escen]

There are many articles on the web about this subject, but MasterD has written a Planetary LOD system.
In this topic there's a very interesting pdf-link showing how this works.
http://irrlicht.sourceforge.net/phpBB2/ ... hlight=lod

[Escen]

Could not find it, but there it is -->
Useful to create Cube to Sphere Projection:
http://britonia.wordpress.com/2010/05/2 ... -geometry/
and some video from the same creator:
http://www.youtube.com/user/lintfordpic ... Wo3ZzRCRJI