Implementing a triangle fan based quadtree terrain engine was easy enough. but every suggested that i move over to triangle strips for speed and space. After some though i quickly came across a problem, or should i say, a challenge. Since my terrain will always have areas with different level of details, triangle strip rendering seems almost counter-intuitive. Im using a vertex buffer that draws 1000 vertices per drawprimitive call. so it loops thru, drawing 1000 vertices worth of polygons until the buffer has all been drawn. problem with using tri-strips is that moving from one quad or area to another will cause the triangles to draw undesireable triangles at undesireable locations. ex: suppose one area far away from the camera is represented by 1 large quad (8 polygons). Then the quads (which are at a higher detail) that are neighbors to the first mentioned quad will have to be drawn BUT CONTINUING with the same triangle strip. Can you see the potential problem here? how is it done then, using tri-strips?

im using triangle fans on a CLOD terrain.
so im calling drawprimitive for every quad (a fan).
so the drawing for this is easy, simply draw the vertex set for every quad that needs to be drawn.