提供三个纯LISP写的图像处理函数

newer · 发表于 2016-5-23 22:51:32

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三个函数： (imgunload <imgname>), (imgreload <imgname>), (imgdetach<imgname>)

卸载、重载、DETACH

问题：
How can I call the IMAGE command from Visual LISP using (command "-IMAGE") in
AutoCAD?

方案解决

To use the RELOAD, UNLOAD and DETACH options of the IMAGE command, it is not
possible to use the AutoCAD ActiveX inte**ce. Instead, you have to 'rebuild'
these options using AutoLISP and Visual LISP functions.

-IMAGE RELOAD:
This command options works on the raster image definition object that is stored
in the dictionary "ACAD_IMAGE_DICT". This object uses the DXFgroup code 280
as a 'loaded' flag. If the value of group code 280 is 1, the image file is currently
loaded; if the value is 0, the image file is unloaded.

In order to get the correct entry in the image dictionary (to get the right
image definition object) and set this flag to 1, use the IMAGERELOAD function
(see below).

-IMAGE UNLOAD:
This command options uses the flag previously mentioned. Set the value of group
code 280 to 0 to unload the image file. The function IMGUNLOAD does this.

-IMAGE DETACH:
This command options removes the specified image definition object and removes
every raster image entity from the current drawing that uses the (deleted) image
definition object. The IMGDETACH function does this.

You can use the following functions. They 'rebuild' the functionality of the
IMAGE command options. The functions (imgreload), (imgunload) and (imgdetach)
need the image name as a parameter. For the image name, use the AutoCAD wildcard
mechanism.

(imgreload "image1")
(imgunload "i*")
(imgdetach "?abc?ef*")

;
;;; Use the function 'imgunload' instead of
;;; calling the command
;;; -IMAGE _Unload
;;;
(defun imgunload (imgname)
(imgloadstat (strcase imgname) 0)
(princ)
);;; Use the function 'imgreload' instead of
;;; calling the command
;;; -IMAGE _Reload
;;;
(defun imgreload (imgname)
(imgloadstat (strcase imgname) 1)
(princ)
);;; Use the function 'imgdetach' instead of
;;; calling the command
;;; -IMAGE _Detach
;;;
(defun imgdetach (imgname / imgDict imgDictId dictLength counter
dictName imgDefIds selSet imgDefId) ;; Iterate all dictionary entries and remove
;; the entries which matches 'imgname'. (setq imgname (strcase imgname)
imgDict (dictsearch (namedobjdict) "ACAD_IMAGE_DICT")
)
(if (equal imgDict nil)
(princ "\nNo images loaded.")
(progn
;; Image dictionary is available.
(setq imgDictId (cdr (car imgDict))
dictLength (length imgdict)
counter 0
)
(while (< counter dictLength)
(if (equal (car (nth counter imgDict)) 3)
;; Entry name found. Get it.
(progn
(setq dictName (strcase (cdr (nth counter imgDict))))
;; Compare the entry name.
(if (wcmatch dictName imgname)
(progn
;; Remove the dictionary entry...
(dictremove imgDictId dictName)
;; ...and store the entity name of
;; the raster image definition object.
(setq imgDefIds
(append imgDefIds
(list (cdr (nth (1+ counter) imgDict)))
)
)
)
)
)
)
(setq counter (1+ counter))
)
;; Finished iterating the dictionary.
;; Do we have to remove some raster image entities?
(if (/= (length imgDefIds) 0)
;; Yes, we have to remove some raster image entities
;; (because the related image definition objects
;; have been removed).
(progn
;; Select all image entities.
(setq selSet (ssget "X" '((0 . "IMAGE")))
counter 0
)
(if (/= selSet nil)
(progn
;; Iterate all image entities
(while (< counter (sslength selSet))
;; Get the entity name of the referenced
;; image definition object.
(setq imgDefId
(cdr (assoc 340 (entget (ssname selSet counter))))
)
;; Is the referenced definition object gone?
(if (member imgDefId imgDefIds)
;; The definition for this image entity
;; have been removed, so let us remove
;; the image entity, as well.
(entdel (cdr (car (entget (ssname selSet counter)))))
)
(setq counter (1+ counter))
)
;; Empty the selection set
(setq selSet nil)
)
)
)
)
)
)
(princ)
);;; Internal function.
;;; This function is called by 'imgunload'
;;; and 'imgreload'.
;;;
(defun imgloadstat (imgname status / imgDict imgDictId
dictLength counter dictName dictEntry next) ;; Get the image dictionary
(setq imgDict (dictsearch (namedobjdict) "ACAD_IMAGE_DICT"))
(if (equal imgDict nil)
(princ "\nNo images loaded.")
(progn
;; Image dictionary is available.
(setq imgDictId (cdr (car imgDict))
dictLength (length imgdict)
counter 0
next T
)
(while (< counter dictLength)
(if (equal (car (nth counter imgDict)) 3)
;; Entry name found. Get it.
(progn
;; Get dictionary entry name
;; and the dictionary entry
(setq dictName (strcase (cdr (nth counter imgDict)))
dictEntry (dictnext imgDictId next)
next nil
)
;; Compare the entry name with the given name.
(if (wcmatch dictName imgname)
(progn
;; Entry found. Set the 'loaded' flag
(setq dictEntry (subst (cons 280 status)
(assoc 280 dictEntry)
dictEntry
)
)
;; There is a problem in AutoCAD which is fixed by 'fixlist'.
;; Some entities / objects should return on 'entget' 2D points,
;; but VisualLisp gets 3D points. The (wrong) z value of thereturned
;; point contains a random value which can break 'entmod'.
;; In case of an image definition object we have to remove the
;; z value of group code 10 and 11 before we can use 'entmod'.
(entmod (fixlist dictEntry))
)
)
)
)
(setq counter (1+ counter))
)
)
)
);

; 
;;; Use the function 'imgunload' instead of 
;;; calling the command 
;;; -IMAGE _Unload 
;;; 
(defun imgunload (imgname) 
   (imgloadstat (strcase imgname) 0) 
   (princ) 
);;; Use the function 'imgreload' instead of 
;;; calling the command 
;;; -IMAGE _Reload 
;;; 
(defun imgreload (imgname) 
   (imgloadstat (strcase imgname) 1) 
   (princ) 
);;; Use the function 'imgdetach' instead of 
;;; calling the command 
;;; -IMAGE _Detach 
;;; 
(defun imgdetach (imgname / imgDict imgDictId dictLength counter 
                  dictName imgDefIds selSet imgDefId)   ;; Iterate all dictionary entries and remove 
   ;; the entries which matches 'imgname'.   (setq imgname (strcase imgname) 
         imgDict (dictsearch (namedobjdict) "ACAD_IMAGE_DICT") 
   ) 
   (if (equal imgDict nil) 
      (princ "\nNo images loaded.") 
      (progn 
         ;; Image dictionary is available. 
         (setq imgDictId  (cdr (car imgDict)) 
               dictLength (length imgdict) 
               counter   0 
         ) 
         (while (< counter dictLength) 
            (if (equal (car (nth counter imgDict)) 3) 
               ;; Entry name found. Get it. 
               (progn 
                  (setq dictName (strcase (cdr (nth counter imgDict)))) 
                  ;; Compare the entry name. 
                  (if (wcmatch dictName imgname) 
                     (progn 
                        ;; Remove the dictionary entry... 
                        (dictremove imgDictId dictName) 
                        ;; ...and store the entity name of 
                        ;; the raster image definition object. 
                        (setq imgDefIds 
                           (append imgDefIds 
                                   (list (cdr (nth (1+ counter) imgDict))) 
                           ) 
                        ) 
                     ) 
                  ) 
               ) 
            ) 
            (setq counter (1+ counter)) 
         ) 
         ;; Finished iterating the dictionary. 
         ;; Do we have to remove some raster image entities? 
         (if (/= (length imgDefIds) 0) 
            ;; Yes, we have to remove some raster image entities 
            ;; (because the related image definition objects 
            ;; have been removed). 
            (progn 
               ;; Select all image entities. 
               (setq selSet  (ssget "X" '((0 . "IMAGE"))) 
                     counter 0 
               ) 
               (if (/= selSet nil) 
                  (progn 
                     ;; Iterate all image entities 
                     (while (< counter (sslength selSet)) 
                        ;; Get the entity name of the referenced 
                        ;; image definition object. 
                        (setq imgDefId 
                           (cdr (assoc 340 (entget (ssname selSet counter)))) 
                        ) 
                        ;; Is the referenced definition object gone? 
                        (if (member imgDefId imgDefIds) 
                           ;; The definition for this image entity 
                           ;; have been removed, so let us remove 
                           ;; the image entity, as well. 
                           (entdel (cdr (car (entget (ssname selSet counter))))) 
                        ) 
                        (setq counter (1+ counter)) 
                     ) 
                     ;; Empty the selection set 
                     (setq selSet nil) 
                  ) 
               ) 
            ) 
         ) 
      ) 
   ) 
   (princ) 
);;; Internal function. 
;;; This function is called by 'imgunload' 
;;; and 'imgreload'. 
;;; 
(defun imgloadstat (imgname status / imgDict imgDictId 
                    dictLength counter dictName dictEntry next)   ;; Get the image dictionary 
   (setq imgDict (dictsearch (namedobjdict) "ACAD_IMAGE_DICT")) 
   (if (equal imgDict nil) 
      (princ "\nNo images loaded.") 
      (progn 
         ;; Image dictionary is available. 
         (setq imgDictId  (cdr (car imgDict)) 
               dictLength (length imgdict) 
               counter   0 
               next   T 
         ) 
         (while (< counter dictLength) 
            (if (equal (car (nth counter imgDict)) 3) 
               ;; Entry name found. Get it. 
               (progn 
                  ;; Get dictionary entry name 
                  ;; and the dictionary entry 
                  (setq dictName (strcase (cdr (nth counter imgDict))) 
                        dictEntry (dictnext imgDictId next) 
                        next   nil 
                  ) 
                  ;; Compare the entry name with the given name. 
                  (if (wcmatch dictName imgname) 
                     (progn 
                        ;; Entry found. Set the 'loaded' flag 
                        (setq dictEntry (subst (cons 280 status) 
                                               (assoc 280 dictEntry) 
                                               dictEntry 
                                        ) 
                        ) 
                        ;; There is a problem in AutoCAD which is fixed by 'fixlist'. 
                        ;; Some entities / objects should return on 'entget' 2D points, 
                        ;; but VisualLisp gets 3D points. The (wrong) z value of thereturned 
                        ;; point contains a random value which can break 'entmod'. 
                        ;; In case of an image definition object we have to remove the 
                        ;; z value of group code 10 and 11 before we can use 'entmod'. 
                        (entmod (fixlist dictEntry)) 
                     ) 
                  ) 
               ) 
            ) 
            (setq counter (1+ counter)) 
         ) 
      ) 
   ) 
);

游客，如果您要查看本帖隐藏内容请回复

lucas3 · 发表于 2016-5-23 23:15:09

谢谢N版分享

HLCAD · 发表于 2016-5-24 08:12:57

谢谢版主！跟着版主真心实意可以学到些东西！

819534890 · 发表于 2016-5-24 09:08:29

good good.

ynhh · 发表于 2016-5-24 10:44:47

谢谢版主
学习一下什么是图象处理

/db_自贡黄明儒_ · 发表于 2016-5-24 11:46:57

用cad来处理图像，N版很有艺术细胞嘛

桥云山 · 发表于 2016-5-24 18:23:14

很不错，值得学习

柴月二号 · 发表于 2016-5-25 00:25:28

学学学习学习学习学习

zjy2999 · 发表于 2016-6-3 09:33:51

xuexi !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

1993063 · 发表于 2016-6-27 13:49:09

谢谢分享！！！！！

sachindkini · 发表于 2016-6-29 19:07:39

dear sir nice

ycao · 发表于 2016-7-1 19:59:30

看看是否用得着该函数。

sicky111 · 发表于 2016-7-1 23:29:36

版主E文水平可真不是盖的，我都看不懂。

lhd244 · 发表于 2016-7-4 16:58:26

学习学习。。顶

qhdycm2016 · 发表于 2017-7-20 15:58:36

我来测试一下，行不行

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[每日一码] 提供三个纯LISP写的图像处理函数

马上注册，结交更多好友，享用更多功能，让你轻松玩转社区。