Load big image in osg

Question

i am using openscenegraph to show a bridge model.I use Texture2D to represent an image.Now,the problem is that the image is too large, about 1G .if i load the whole image at one time,it would be a waste of computer memory. I want to implement the effect similar to google map.Loading image of different quality according to distance of view sight. Is there any body know how to achieve that?

Answer 1

You want to be using something like osgEarth, which handles all of that sort of thing, and basically is a Google Earth clone.

Alternately, Virtual Planet Builder does some of the tiling and paging that Google Maps/Earth do. osgEarth was designed as an enhancement to the capabilities in VPB.