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发表于 2015-10-30 10:53:57
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lilq_78 发表于 2014-2-19 15:46 
顶，但是矩形与矩形相交打断不行
对原程序243-266行代码进行了改进：
;;==========================================
;; Break many objects with a single object
;;==========================================
(defun c:breakwobjects (/ cmd ss1 ss2)
(defun ssredraw (ss mode / i num)
(setq i -1)
(while (setq ename (ssname ss (setq i (1+ i))))
(redraw (ssname ss i) mode)
)
)
(command ".undo" "begin")
(setq cmd (getvar "CMDECHO"))
(setvar "CMDECHO" 0)
;; get objects to break
(prompt "\nSelect object(s) to break & press enter: ")
(if (and (setq ss1 (ssget '((0 . "LINE,ARC,SPLINE,LWPOLYLINE,POLYLINE,CIRCLE,ELLIPSE"))))
(not (ssredraw ss1 3))
(not (prompt "\n*** Select single object to break with: ***"))
(setq ss2 (ssget "+.:E:S" '((0 . "LINE,ARC,SPLINE,LWPOLYLINE,POLYLINE,CIRCLE,ELLIPSE"))))
(not (ssredraw ss1 4))
)
(break_with ss1 ss2 nil) ; ss2break ss2breakwith (flag nil = not to break with self)
)
(setvar "CMDECHO" cmd)
(command ".undo" "end")
(princ)
)
;;==========================================
;; Break many objects with many object
;;==========================================
(defun c:BreakWith (/ cmd ss1 ss2)
(defun ssredraw (ss mode / i num)
(setq i -1)
(while (setq ename (ssname ss (setq i (1+ i))))
(redraw (ssname ss i) mode)
)
)
(command ".undo" "begin")
(setq cmd (getvar "CMDECHO"))
(setvar "CMDECHO" 0)
(setq xuanz nil)
;; get objects to break
(prompt "\n选择要打断的直线或多线段，按回车确定: ")
(if (and (setq ss1
(ssget
'((0
.
"LINE,ARC,SPLINE,LWPOLYLINE,POLYLINE,CIRCLE,ELLIPSE"
)
)
)
xuanz (ssget "P" '((0 . "LWPOLYLINE") (70 . 1)));取出选中的闭合多段线，一般为矩形或多边形命令创建
flag1 (if (/= ss1 nil) T);判断选择集ss1是否非空
)
(not (ssredraw ss1 3))
(not
(prompt
"\n*** 选择作为打断线的直线或多线段，按回车确定: ***"
)
)
(setq
ss2 (ssget
'((0
.
"LINE,ARC,SPLINE,LWPOLYLINE,POLYLINE,CIRCLE,ELLIPSE"
)
)
)
ssd (ssredraw ss1 4);新增
flag2 (if (/= ss2 nil) T);判断选择集ss2是否非空
)
;(not (ssredraw ss1 4))把该语句放在上面的setq语句群里，避免ss2为nil时本句不被执行的意外情况
)
(progn
(if(/= xuanz nil)
(progn
(setq snum -1)
(repeat (SSLENGTH xuanz)
(setq a (entget (ssname xuanz (setq snum (+ 1 snum)))));取出xuanz中的每个闭合多线段
(setq num (cdr (assoc 90 a))) ;多线段顶点数量
(setq pnum (- (length a) (length (member (assoc 10 a) a))))
;pnum为多线段第一个顶点坐标子列表所在项数（组码10）
(setq qdlst (PARTLIST1 pnum (+ pnum 4) a))
;第一个端点列表
(setq tou (PartList1 0 (- (length a) 2) a))
;原列表去掉最后一个元素后的新列表
(setq zhong (append tou qdlst))
;新列表插入第一个端点坐标
(setq wei (nth (- (length a) 1) a))
;保存原列表最后一个元素
(setq a (append zhong (list wei)))
;加入原列表最后一个元素
(setq a (subst (cons 70 0) (assoc 70 a) a))
;将闭合多线段改为非闭合多线段
(setq a (subst (cons 90 (+ num 1)) (assoc 90 a) a))
;修改多线段顶点个数
(entmod a)
)
)
)
(break_with ss1 ss2 nil) ; ss2break ss2breakwith (flag nil = not to break with self)
)
)
(setvar "CMDECHO" cmd)
(command ".undo" "end")
(princ)
)
其中用到了黄老师提供的函数：
;截取部分列表子函数
(defun PartList1 (from to lst / I L)
(setq i -1)
(foreach x lst
(setq i (1+ i))
(cond ((and (>= i from) (<= i to)) (setq l (cons x l))))
)
(REVERSE l)
) |
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