2D Diamond (isometric) map editor - Textures extended infinitely?

Question

I\'m currently developing a 2D isometric map editor. I display entity(cube, player) which contains points and textures. Each cubes are composed by 12 points.(12 points, but

Answer 1

I endend by finding better way to do this code, thanks to members of stackoverflow. For people who got there by looking for a solution to a similar problem, I invite you to look at the comments for some usefull links and comment.