PLAYFIELD_LEFT = 0
PLAYFIELD_TOP = 64
PLAYFIELD_RIGHT = RES_X
PLAYFIELD_BOTTOM = RES_Y

PLAYFIELD_W = (PLAYFIELD_RIGHT - PLAYFIELD_LEFT)
PLAYFIELD_H = (PLAYFIELD_BOTTOM - PLAYFIELD_TOP)

PLAYFIELD_CENTER_X = (((PLAYFIELD_RIGHT - PLAYFIELD_LEFT) / 2) + PLAYFIELD_LEFT)