dx = (4.0 * x/width)-2.0
dy = (4.0 * y/depth)-2.0
dz = (4.0 * z/height)-2.0

dx2 = (1.1 * x/width)
dy2 = (1.1 * y/depth)
dz2 = (1.1 * z/height)

a = 1.0

if ((dx**2+dy**2+dz**2)**2) <= (2*a**2*(dx**2-dy**2-dz**2)):
	return Color(255*dx2, 255*dy2, 255*dz2, 255)
elif ((dz**2+dy**2+dx**2)**2) <= (2*a**2*(dz**2-dy**2-dx**2)):
	return Color(255*dx2, 255*dy2, 255*dz2, 255)
elif ((dy**2+dx**2+dz**2)**2) <= (2*a**2*(dy**2-dx**2-dz**2)):
	return Color(255*dx2, 255*dy2, 255*dz2, 255)
else:
	return empty