   Endless scrolling terrain with Geoclipmapping
  Hiya, thanks for reading this.I've been implementing Grafensteins Geoclipmapping tutorial (here: http://www.ziggyware.com/readarticle.php?article_id=220).  Very nice piece of work by Grafenstein, except it only works if you aren't transforming the terrain position.I've been trying to alter the code to be able to place the terrain at different positions...basically I want to be able to render multiple terrains for an "endless scrolling terrain" system....without much luck and I'm getting very frustrated.  Does anybody know of any resources or tutorials out there for this?  OR would anybody be willing to look at my implementation of Grafensteins code and tell me what the HECK I'm doing wrong?   
  An excellent place to look is over at the Virtual Terrain Project page. They might have something that would help you out.http://www.vterrain.org/;  I can't remember which methods you need to update in his implementation, but the solution to the problem is as follows.I believe his method uses an array, read from a texture at runtime, for the height at each point.Say you are using a 256 x 256 heightmap, if you try to look at the height at (257, 257), instead of returning 0 for the height, it should give you the height at the point (1, 1). This would cause the terrain to appear infinite, whilst simply repeating it over and over again.If I've not understood what you were trying to ask, then please do correct me and I'll try my best to help. Geoclipmapping is something I'm actively working on right now (although a completely GPU based version).   