两个非常简单的程序：([color=BLUE]defun[/color] c:spiral ( [color=BLUE]/[/color] i l s x ) ([color=BLUE]setq[/color] s 0.0 i ([color=BLUE]/[/color] [color=BLUE]pi[/color] 25.0) x ([color=BLUE]exp[/color] ([color=BLUE]/[/color] ([color=BLUE]log[/color] ([color=BLUE]/[/color] ([color=BLUE]1+[/color] ([color=BLUE]sqrt[/color] 5)) 2)) [color=BLUE]pi[/color] 0.5)) ) ([color=BLUE]repeat[/color] 50 ([color=BLUE]setq[/color] l ([color=BLUE]cons[/color] ([color=BLUE]list[/color] 10 ([color=BLUE]*[/color] ([color=BLUE]cos[/color] s) ([color=BLUE]expt[/color] x s)) ([color=BLUE]*[/color] ([color=BLUE]sin[/color] s) ([color=BLUE]expt[/color] x s))) l) s ([color=BLUE]+[/color] s i) ) ) ([color=BLUE]entmake[/color] ([color=BLUE]append[/color] ([color=BLUE]list[/color] '(0 . [color=MAROON]"LWPOLYLINE"[/color]) '(100 . [color=MAROON]"AcDbEntity"[/color]) '(100 . [color=MAROON]"AcDbPolyline"[/color]) '(70 . 0) ([color=BLUE]cons[/color] 90 ([color=BLUE]length[/color] l)) ) l ) ) ([color=BLUE]command[/color] [color=MAROON]"_.zoom"[/color] [color=MAROON]"_E"[/color]) ([color=BLUE]princ[/color])) ([color=BLUE]defun[/color] c:3dspiral ( [color=BLUE]/[/color] c i n p s x ) ([color=BLUE]setq[/color] s 0.0 i ([color=BLUE]/[/color] [color=BLUE]pi[/color] 25.0) x ([color=BLUE]exp[/color] ([color=BLUE]/[/color] ([color=BLUE]log[/color] ([color=BLUE]/[/color] ([color=BLUE]1+[/color] ([color=BLUE]sqrt[/color] 5)) 2)) [color=BLUE]pi[/color] 0.5)) ) ([color=BLUE]entmake[/color] '((0 . [color=MAROON]"POLYLINE"[/color]) (70 . )) ([color=BLUE]repeat[/color] 50 ([color=BLUE]entmake[/color] ([color=BLUE]list[/color] '(0 . [color=MAROON]"VERTEX"[/color]) '(70 . 32) ([color=BLUE]list[/color] 10 ([color=BLUE]*[/color] ([color=BLUE]cos[/color] s) ([color=BLUE]expt[/color] x s)) ([color=BLUE]*[/color] ([color=BLUE]sin[/color] s) ([color=BLUE]expt[/color] x s)) s) ) ) ([color=BLUE]setq[/color] s ([color=BLUE]+[/color] s i)) ) ([color=BLUE]setq[/color] p ([color=BLUE]cdr[/color] ([color=BLUE]assoc[/color] 330 ([color=BLUE]entget[/color] ([color=BLUE]entmakex[/color] '((0 . [color=MAROON]"SEQEND"[/color])))))) n ([color=BLUE]mapcar[/color] '[color=BLUE]-[/color] ([color=BLUE]list[/color] ([color=BLUE]*[/color] ([color=BLUE]cos[/color] i) ([color=BLUE]expt[/color] x i)) ([color=BLUE]*[/color] ([color=BLUE]sin[/color] i) ([color=BLUE]expt[/color] x i)) i) '(1.0 0.0 0.0) ) ) ([color=BLUE]setq[/color] c ([color=BLUE]entmakex[/color] ([color=BLUE]list[/color] '(0 . [color=MAROON]"CIRCLE"[/color]) '(40 . 0.2) ([color=BLUE]cons[/color] 10 ([color=BLUE]trans[/color] '(1.0 0.0 0.0) 0 n)) ([color=BLUE]cons[/color] 210 n) ) ) ) ([color=BLUE]command[/color] [color=MAROON]"_.extrude"[/color] c [color=MAROON]""[/color] [color=MAROON]"_P"[/color] p [color=MAROON]"_.zoom"[/color] [color=MAROON]"_E"[/color]) ([color=BLUE]princ[/color])) 
置顶卡
