Original Post
hey - i am making a 2d isometric rts, and before, the tiles were rendered from left to right and down, so: 123 456 789 but the problem with this was that it looked very wrong - especially with the indent to fill the gaps. So i started to make an algorithm to draw them in a diamond shape, like: 7 4 1 8 5 2 9 6 3 when i used a function that drew them in the array manually, it worked fine, no errors : qTile[0][0] = CreateQuad((i*size_x) + 500, (j*size_y)-(j)+0,64, 32, tGrass, 0, 0); qTile[1][0] = CreateQuad((i*size_x) + 500 - 32, (j*size_y)-(j)+16,64, 32, tGrass, 0, 0); qTile[2][2] = CreateQuad((i*size_x) + 564 - 64, (j*size_y)-(j)+64,64, 32, tGrass, 0, 0); this sort of thing worked out fine, as stated before, but the problem was when i tried to put it into a loop: for (int j = 0;j<3;j++) for (int i = 0;i<3;i++) qTile[j] = CreateQuad((i*tile_move_x) + tile_start_x, (i*tile_move_y) + tile_start_y, 64, 32,tGrass,0,0); and for youre reference: const int screen_width = 1024; const int screen_height = 768; const int tile_width = 64; const int tile_height = 32; const int tile_move_x = 32; const int tile_move_y = 16; const int tile_start_x = screen_width/2; const int tile_start_y = screen_height; the problem is that when i try it with the loop it comes up with a blank screen - even though it works fine when i do it manually without a loop. I would appreciate any comments people may have to offer Xpy