angles : angles among particles, list in the following form;
(define angles '(
(; angle type 1
10.0 ; 1) constant (k^{angle})
0.0 ; 2) angle in degree (theta_0)
0 ; 3) scale flag (0 == scaled)
; in this case, the above value for k is just used.
((0 1 2); 4) list of triplets
(1 2 3)
(2 3 4)
)
)
(; angle type 2
20.0 ; 1) constant (k^{angle})
90.0 ; 2) angle in degree (theta_0)
1 ; 3) scale flag (1 == not scaled yet)
; in this case, the potential is given by
; (k/2) * kT * (theta - theta_0)^2
((3 4 5); 4) list of triplets
(4 5 6)
)
)
))
