time=50
dt=.1
diver=(sin(t * .5), cos(t * .5) + t * .1, (-1 - .5 * (.5 + .5 * sin(t / 10))))
buoy_num=4
buoy[0]=(-1.3, -1.2, -0.0)
buoy[1]=(1.1, -1.1, 0.02)
buoy[2]=(1.2,  1.2, -0.01)
buoy[3]=(-1.2,  1.2, 0.01)
swap_y_z=1
