cad尺寸驱动

lixuming

这个程序只能驱动直线，曲线类不能驱动，程序本身是网上找的，偶就是基本改了下，使驱动后尺寸准确，把程序复制到tt.txt里面再改成vtt.lsp文件，再2CAD加载就可以了，执行命令为:TT(应该算是原创吧)

(defun c:tt(/ BLB EP ESPL N-EP N-SP NEW-T SD SD-DXF SEA SEB SP SS1 SS2 SS3)
(setq SD (entsel "\n选择驱动尺寸:"))
(if SD
  (PROGN
    (SETQ SD-DXF (ENTGET (CAR SD)))
    (WHILE (NOT (wcmatch (CDR (ASSOC 0 SD-DXF)) "*DIM*"))
(setq SD (entsel "\n选择驱动尺寸:"))
(SETQ SD-DXF (ENTGET (CAR SD))))
    (SETQ SP (CDR (ASSOC 13 SD-DXF))
  EP (CDR (ASSOC 14 SD-DXF))
  ESPL (DISTANCE SP EP)
  SEA (ANGLE SP EP)
  SEB (ANGLE EP SP)
  NEW-T (getdist "\n新的长度:"))
    (while (eq nil NEW-T)
(setq NEW-T (getdist "\n新的长度:")))
    (if NEW-T
(progn
    (setq BLB (* 1 (abs (- NEW-T ESPL))))
    (if (> ESPL NEW-T )
(setq N-SP (POLAR SP SEA BLB)
    N-EP (POLAR EP (+ PI SEA) BLB))
(setq N-SP (POLAR SP SEB BLB)
    N-EP (POLAR EP (+ PI SEB) BLB))
)
    (setvar "osmode" (logior (getvar "osmode") 16384))
    (setvar "cmdecho" 0)
    (vl-cmdf "_.undo" "_group")
    (SETQ SS1 (SSGET "C" (POLAR SP (+ PI (* 0.25 PI)) 0.4)(POLAR SP (* 0.25 PI) 0.4))
  SS2 (SSGET "C" (POLAR EP (+ PI (* 0.25 PI)) 0.4)(POLAR EP (* 0.25 PI) 0.4))
  )
    (IF SS1
(COMMAND "STRETCH" (SSGET "C" (POLAR SP (+ PI (* 0.25 PI)) 0.4)(POLAR SP (* 0.25 PI) 0.4))
  ""SP N-SP))
    (IF SS3
(COMMAND "STRETCH" (SSGET "C" (POLAR EP (+ PI (* 0.25 PI)) 0.4)(POLAR EP (* 0.25 PI) 0.4))
  ""EP N-EP))
    (vl-cmdf "_.undo" "_end")
    (setvar "osmode" (logand (getvar "osmode") 49151))
    (PRINC"\n编写:BDYCAD\n尺寸驱动程序运行完毕, 欢迎使用.谢谢!")))
    )
  )
(princ)
)

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