
 Amit's Thoughts on Grids 
  A big disadvantage of triangle maps, aside from unfamiliarity, is the large perimeter and small area (the opposite of a hexagon). 
  The F,E,V of squares is 1,2,1; of hexagons, 1,3,2; of triangles 2,3,1. 
  To determine which face the world point is in, consider the edge that divides the two triangles inside each sheared square; this is labeled E. If your point is on the left of the line, the point is in the L face; if on the right, the point is in the R face. 
 wwwcsstudents.stanford.edu /~amitp/gameprogramming/grids (3000 words) 
