Visual LISP, AutoLISP and General Customization

[#1]

(defun c:sst (/ midl dis psz pipe ppp) 
(setq OLDOS (getvar "OSMODE" ))
(setq olay (getvar "clayer" ))
(setvar "dimzin" 1 )
(setvar "attdia" 0 )
(setvar "attreq" 1 )
(while                  
(setvar "OSMODE" 69 )
(princ (strcat "\n Pipe Size:< ")) (princ ppp)
(INITGET 6)  
(setq psz (GETSTRING " >: "))
(if (= PSZ "")(setq PSZ pipe))
(cond
((= psz "1" )(setq pipe "1" ) (setq ppp "1\"" ))
((= psz "1~" )(setq pipe "1~" )(setq ppp "1-1/4\"" ))
((= psz "1`" )(setq pipe "1`" )(setq ppp "1-1/2\"" ))
((= psz "2" )(setq pipe "2" )(setq ppp "2\"" ))
((= psz "2`" )(setq pipe "2`" )(setq ppp "2-1/2\"" ))
((= psz "3" )(setq pipe "3" )(setq ppp "3\"" ))
((= psz "4" )(setq pipe "4" )(setq ppp "4\"" ))
((= psz "6" )(setq pipe "6" )(setq ppp "6\"" ))
((= psz "8" )(setq pipe "8" )(setq ppp "8\"" ))
((= psz "10" )(setq pipe "10" )(setq ppp "10\"" ))
)
                     	(if (setq pt1 (getpoint "\nFirst point: "))
                         (= pt1 "")(setq pt1 pt3))                
			(setq pt2 (getpoint "\nSecond point: ")) 
(if (= pt2 nill )(setvar "clayer" olay )
(SETVAR "OSMODE" OLDOS )  )           
			(setq MX (/ (+ (car PT1) (car PT2)) 2)
		         MY (/ (+ (cadr PT1) (cadr PT2)) 2)
		           MIDL (list MX MY 0))
		  	(setq dis (distance pt1 pt2 ))
			(setq ang (angle pt1 pt2 ))
        (if (>= ang 0)
          (setq ang1 ang)
        )
        (if (> ang 1.5708);same as 90°
          (setq ang1 (+ 3.14159 ang));add 180°
        )
        (if (>= ang 4.71413);same as 270.1°
          (setq ang1 ang)
        )

			(setq angd (rtd ang1 ))
			(setq dis (rtos dis 4 0 ))
                        (setvar "OSMODE" 0 )
                        (command "-layer" "m" "PTAG" "c" "7" "" "")
			(command "insert" "P_TAG" midl binssc binssc angd dis pSZ "") 
                (setq pt3 pt2)
                (setq attent (entget (entlast)))	
	        (setq atttag (cdr (assoc 2 attent )))
                (setq entn (entget (entnext (cdr (car attent)))))
		(setq attnam (cdr (assoc 2 entn )))
	        (setq atttag (cdr (assoc 2 entn )))
                                (if (= attnam atttag)
				(progn
				(setq str (cdr (assoc 1 entn )))
				(setq strl (strlen str ))
					(cond   ((= (wcmatch str "#\.") T ) (setq stal 2 ))
                                                ((= (wcmatch str "##\.") T ) (setq stal 3 ))
                                                ((= (wcmatch str "#.-#\.") T ) (setq stal 4 ))
						((= (wcmatch str "#.-##\.") T ) (setq stal 5 ))
						((= (wcmatch str "##.-#\.") T ) (setq stal 6 ))
						((= (wcmatch str "##.-##\.") T ) (setq stal 7 ))
						((= (wcmatch str "###.-#\.") T ) (setq stal 8 ))
						((= (wcmatch str "###.-##\.") T ) (setq stal 9 ))
					)
				(setq stnum (substr str 1 stal ))
				(setq rstal (+ stal 1 ))
				(setq strest (substr str rstal strl ))
				(setq stnuml (strlen stnum ))
					(cond  ((= stnuml 2 )
						(setq p1 "0-" )
						(setq p2 (substr stnum 1 1 ))
						)
                                                ((= stnuml 3 )
						(setq p1 "0-" )
						(setq p2 (substr stnum 1 2 ))
						)
                                                ((= stnuml 4 )
						(setq p1 (substr stnum 1 1 ))
						(setq p2 (substr stnum 4 4 ))
						)
						((= stnuml 5 )
						(setq p1 (substr stnum 1 1 ))
						(setq p2 (substr stnum 4 5 ))
						)
						((= stnuml 6 )
						(setq p1 (substr stnum 1 2 ))
						(setq p2 (substr stnum 5 5 ))
						)
						((= stnuml 7 )
						(setq p1 (substr stnum 1 2 ))
						(setq p2 (substr stnum 5 6 ))
						)
						((= stnuml 8 )
						(setq p1 (substr stnum 1 3 ))
						(setq p2 (substr stnum 6 6 ))
						)
						((= stnuml 9 )
						(setq p1 (substr stnum 1 3 ))
						(setq p2 (substr stnum 6 7 ))
						)
					)
                                (setq P1I (atoi P1 ))
                                (setq P2I (atoi P2 ))
                                (setq PP1 (itoa P1I))
                                (setq PP2 (itoa P2I))
				(setq NN1 (strcat PP1 "-" PP2 ))
				(setq newatt NN1 )
				(setq entn (subst (cons 1 newatt ) (assoc 1 entn ) entn ))
				(entmod entn )
                                (entupd (entlast)) 
				);progn
				);if
);while
(setvar "clayer" olay )
(SETVAR "OSMODE" OLDOS )   
)

I use this lsp to place pipe size and distance from picked point to picked point. I know it is written poorly and could use some help cleaing it up. Take a look and see if you have any ideas at making it better.

[#2]

The attached contains some comments and suggestions, but not about everything yet -- see the questions at the beginning of the attribute-text-content portion.

[#3]

I dug a little deeper into this, and actually tested it a little, so among the other improvements, I included the missing quotation mark in one of the prompts in my first attachment.

The one obviously named that way is 'stripped' of most commentary and all commented-out parts from the original.

Consider also defining the (rtd) function and/or the 'binssc' variable within the file, just in case....