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Up: 13 シミュレーション例
Previous: 13.4 シミュレーションの例（１）
シミュレーション(1)を衝突チェックまでいれた形で拡張した例を示します．
各時間単位の繰り返しごとに，衝突しているかどうかを確かめる部分が追加さ
れたものが create-universe2 です．
(defun create-universe2 (&optional (cnt 4))
(let
((p1 (make-something 'particle 'p1 4 3 2 5))
(p2 (make-something 'particle 'p2 0 0 0 1))
(p3 (make-something 'particle 'p3 1 1 9 4))
(r1 (make-something 'rocket 'r1 2 3 4 3))
(r2 (make-something 'rocket 'r2 7 5 2 1))
(r3 (make-something 'rocket 'r3 3 4 4 2)))
(set-motor r1 '(2 1))
(set-motor r2 '(7 6))
(set-motor r3 '(2 3))
(dotimes
(i cnt)
(format t "~%~%cnt=~s" i)
(dolist (obj (list p1 p2 p3 r1 r2 r3))
(status obj)
(cond
((crashed? obj)
(format t "~% -> ~a has crashed"
(pname obj)))
(t (new-position obj)
(new-velocity obj)))))))
crashしたかどうかの判定は，すべてのパーティクル，ロケットに同じ
メソッド crashed? を送ることで行なっています．
crashed?のメソッドは，particleに定義されています．
実行結果は以下のようになります．
<cl> (create-universe2)
cnt=0
P1's Pos:(4 3) Vel:(2 5) Acc:(0 4)
P2's Pos:(0 0) Vel:(0 1) Acc:(0 4)
P3's Pos:(1 1) Vel:(9 4) Acc:(0 4)
R1's Pos:(2 3) Vel:(4 3) Acc:(2 5) Motor:(2 1)
R2's Pos:(7 5) Vel:(2 1) Acc:(7 10) Motor:(7 6)
R3's Pos:(3 4) Vel:(4 2) Acc:(2 7) Motor:(2 3)
cnt=1
P1's Pos:(6 8) Vel:(2 9) Acc:(0 4)
P2's Pos:(0 1) Vel:(0 5) Acc:(0 4)
P3's Pos:(10 5) Vel:(9 8) Acc:(0 4)
R1's Pos:(6 6) Vel:(6 8) Acc:(2 5) Motor:(2 1)
R2's Pos:(9 6) Vel:(9 11) Acc:(7 10) Motor:(7 6)
R3's Pos:(7 6) Vel:(6 9) Acc:(2 7) Motor:(2 3)
cnt=2
P1's Pos:(8 17) Vel:(2 13) Acc:(0 4)
P2's Pos:(0 6) Vel:(0 9) Acc:(0 4)
P3's Pos:(19 13) Vel:(9 12) Acc:(0 4)
R1's Pos:(12 14) Vel:(8 13) Acc:(2 5) Motor:(2 1)
R2's Pos:(18 17) Vel:(16 21) Acc:(7 10) Motor:(7 6)
R3's Pos:(13 15) Vel:(8 16) Acc:(2 7) Motor:(2 3)
cnt=3
P1's Pos:(10 30) Vel:(2 17) Acc:(0 4)
-> P1 has crashed
P2's Pos:(0 15) Vel:(0 13) Acc:(0 4)
P3's Pos:(28 25) Vel:(9 16) Acc:(0 4)
R1's Pos:(20 27) Vel:(10 18) Acc:(2 5) Motor:(2 1)
-> R1 has crashed
R2's Pos:(34 38) Vel:(23 31) Acc:(7 10) Motor:(7 6)
R3's Pos:(21 31) Vel:(10 23) Acc:(2 7) Motor:(2 3)
-> R3 has crashed
NIL
generated through LaTeX2HTML. M.Inaba 平成18年5月6日