下面的程序也可以画管子的相贯线，输入的参数D为大管直径，d为小管直径(可以等于D)，B为两管的夹角，插入点为小管中心线与大管外壁的交点。该程序在R14上调试通过。
(DEFUN C:XGX ()
(SETQ OLDOS (GETVAR "OSMODE"))
(SETVAR "OSMODE" 0)
(SETVAR "CMDECHO" 0)
(SETQ D (GETDIST "\nDiamter of D= ")
DS (GETDIST "\nDiamter of d= "))
(WHILE (> DS D)
(PROMPT "\nThe d must less than D! ")
(SETQ DS (GETDIST "\nReinter Diamter of d= "))
)
(SETQ B (GETREAL "\nAngle of the pipe (DEG) B= <90> "))
(WHILE (= B 0)
(PROMPT "\nThe angle B must begger than 0")
(SETQ B (GETREAL "\nAngle of the pipe (DEG) B= <90> "))
)
(SETQ B (/ (* (IF (= B nil) 90 0) PI) 180)
ANG (- B PI)
A 0 TA (/ (* 5 PI) 180)
RS (* DS 0.5) R (* D 0.5)
PT (GETPOINT "\nPipe Conect Point : ")
PT1 (POLAR PT 0 (/ RS (SIN B))))
(IF (EQUAL D DS 1E-5) (PROGN
(SETQ PT2 (POLAR PT ANG (/ RS (SIN B))) PT3 (POLAR PT PI (/ RS (SIN B))))
(COMMAND "PLINE" PT1 PT2 PT3 "")
) (PROGN
(SETQ A (+ A TA) RA (* (SIN A) RS) RB (* (COS A) RS))
(COMMAND "PLINE" PT1 "A")
(SETQ PT2 (POLAR (POLAR PT 0 (/ RB (SIN B))) ANG (/ (- R (SQRT (- (* R R) (* RA RA)))) (SIN B))))
(COMMAND "S" PT2)
(REPEAT 35
(SETQ A (+ A TA) RA (* (SIN A) RS) RB (/ (* (COS A) RS) (SIN B))
PT2 (POLAR (POLAR PT 0 RB) ANG (/ (- R (SQRT (- (* R R) (* RA RA)))) (SIN B))))
(COMMAND PT2)
)
(COMMAND "")
))
(SETVAR "OSMODE" OLDOS)
(SETVAR "CMDECHO" 1)
(PRINC)
)
(DEFUN C:XGX2 ()
(SETQ OLDOS (GETVAR "OSMODE"))
(SETVAR "OSMODE" 0)
(SETVAR "CMDECHO" 0)
(SETQ D (GETDIST "\nDiamter of D= ")
DS (GETDIST "\nDiamter of d= "))
(WHILE (> DS D)
(PROMPT "\nThe d must less than D! ")
(SETQ DS (GETDIST "\nReinter Diamter of d= "))
)
(SETQ B (GETREAL "\nAngle of the pipe (DEG) B= <90> "))
(WHILE (= B 0)
(PROMPT "\nThe angle B must begger than 0")
(SETQ B (GETREAL "\nAngle of the pipe (DEG) B= <90> "))
)
(PROMPT "\nEnter Length of small pipe L=
(PRINC (* 3 DS))
(SETQ L (GETDIST "> "))
(SETQ L (IF (= L nil) (* 3 DS) L))
(SETQ B (/ (* (IF (= B nil) 90 B) PI) 180)
ANG (- B PI) AL1 (/ PI 2) AL2 (- AL1)
A 0 TA (/ (* 5 PI) 180)
RS (* DS 0.5) R (* D 0.5)
LSTEP (* TA RS)
PT (GETPOINT "\nInsert Point : ")
PT1 (POLAR PT PI (* RS PI))
PT2 (POLAR PT1 AL1 L))
(SETQ A (+ A TA) RA (* (SIN A) RS))
(COMMAND "PLINE" PT2 "A")
(SETQ PT3 (POLAR PT2 0 LSTEP)
PT2 (POLAR PT3 AL1 (/ (- R (SQRT (- (* R R) (* RA RA)))) (SIN B))))
(COMMAND "S" PT2)
(REPEAT 71
(SETQ A (+ A TA) RA (* (SIN A) RS))
PT3 (POLAR PT3 0 LSTEP)
PT2 (POLAR PT3 AL1 (/ (- R (SQRT (- (* R R) (* RA RA)))) (SIN B))))
(COMMAND PT2)
)
(SETQ PT3 (POLAR PT3 AL2 L))
(COMMAND "L" PT3 PT1 "C")
(SETVAR "OSMODE" OLDOS)
(SETVAR "CMDECHO" 1)
(PRINC)
)
lisp 相贯线展开_一个画两管相接相贯线的程序 - AutoLISP/Visual LISP 编程技术 - CAD论坛 - 明经CAD社区 - Powered by Discuz!...
