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Collision detection for 3D pacman

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Hi all, I''m creating a pacman game in openGL using glut and ANSI C (well it doesn''t have to be, but I''m aiming for ANSI C compatibility) and I have no idea how to do the collision detection between pacman and the arena (which is built out of cubes). The arena layout is read in from a file and looks like: ######## # # ### # ## # # ## # ### # # ######## (not literally, but same idea). Where # is a cube in glut. The coordinates go between -10 and 10 in X, -10 and 10 in Y and the depth is always just a single cube so it''s not really relevant as the Z plane is constant. Pacman''s position is stored in two integers, pacX, pacY which use the same system as the arena. Any ideas? Thanks, Y

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