I Can’t get Graphics Gems books, I can just see the topic in http://www.acm.org/pubs/tog/GraphicsGems/gemsii/
now I need the implementation of Quadtree to boundary conversion, becasue I want to draw a terrain using quadtree, and then draw a road on it, I must got the boundary of the terrain, in order to intersect with the road’s boundary,but I don’t know the algorithm well, I hope somebody help me.thanks.