CAD中用LSP绘制标准齿轮,希望对大家有帮助

WMWM · 发表于 2003-4-15 10:30:44

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(defun C:ZL ()
(command "viewres" "" 20000)
(setq numt (getint "\n正齿轮齿数:<24> "))
(if (= numt nil)
   (setq numt 24)
)
(setq diap (getreal "\n节距:<4> "))
(if (= diap nil)
   (setq diap 4.0)
)
(setq prsa (getreal "\n压力角:<14.5> "))
(if (= prsa nil)
   (setq prsa 14.5)
)
(setq pnts (getint "\n圆弧精确度:<10> "))
(if (= pnts nil)
   (setq pnts 10)
)

(setq prsa (/ (* prsa pi) 180.))
(setq pitd (/ numt diap))
(setq outd (/ (+ numt 2) diap))
(setq basr (/ (* pitd (cos prsa)) 2.0))
(setq orad (/ outd 2.0))
(setq z (- (expt orad 2.0) (Expt basr 2.0)))
(setq x (sqrt z))
(setq paodd (atan (/ x basr)))
(setq incr (/ paodd pnts))
(setq p 0.0)
(setq pitr (/ pitd 2))
(setq pang (/ 360. (* Numt 4.0)))
(setq pang (/ (* pang pi) 180.))
(graphscr)
(setq p2 (getpoint "\n齿轮的中心点: "))
(setq y2 (CADr p2))
(setq x2 (car p2))
(setq y5 (+ y2 basr))
(setq p5 (list x2 y5))
(command "circle" p2 pitr)
(setq a1 (- (/ pi 2.0) 0.1))
(setq a2 (+ (/ pi 2.0) 0.1))
(setq pz1 (polar p2 a1 basr))
(setq pz2 (polar p2 a2 orad))
(command "zoom" "w" pz1 pz2)
(setq s (ssadd))
(setq le (entlast))

(setq test 0)
(command "pline" p5)
(setq p (+ incr p))
(while (> pnts 0)
   (setq e1 (sin p))
   (setq e2 (cos p))
   (setq e (/ e1 e2))
   (setq j (- e p))
   (setq x1 (* (/ (sin j) (cos p)) basr))
   (setq y1 (* (/ (cos j) (cos p)) basr))
   (setq x3 (+ x2 x1))
   (setq y3 (+ y2 y1))
   (setq p3 (list x3 y3))
   (command p3)
   (setq p (+ incr p))
   (setq pnts (- pnts 1))
   (if (/= test 1)
   (progn
      (setq hyp (sqrt (+ (expt x1 2) (expt y1 2))))
      (if (> hyp pitr)
         (progn
         (setq pint p3)
         (setq test 1)
         )
      )
   )
   )
)
(command "")
(initget "Y y N n")
(setq ans (getkword "\n要继续完成绘制吗?:<Y> "))
(if (/= ans "N")
   (progn
   (command "zoom" "c" p2 7)
   (setq p11 (osnap pint "inter"))
   (setq ang (angle p2 p11))
   (setq angi (- ang pang))
   (setq p12 (polar p2 angi 1.0))
   (command "mirror" p5 "" p2 p12 "")
   (setq beta (angle p2 p3))
   (setq ang2 (- (* angi 2.0) beta))
   (setq p15 (polar p2 ang2 orad))
   (command "arc" p15 "c" p2 p3)
   (setq adj1 (- angi (/ pi 2.0)))
   (setq adj2 (- (/ pi 2.0) (* pang 4.0)))
   (setq p17 (polar p2 (+ angi adj1) basr))
   (setq p16 (polar p2 adj2 basr))

   (while (setq le (entnext le))
      (ssadd le s)
   )

   (command "array" s "" "p" p2 numt "" "")
   (command "zoom" "e")
   )
)
(Prompt "\n完成!")
(princ)
(command "arc" p16 "c" p2 p17)
(setq sa2 (entlast))
(command "array" sa2 "" "p" p2 numt "" "")

)