This time I have a very special AutoLISP program for you. Donuts are drawn and a closed area is hatched.
The AutoLISP program looks simple. But it is not. Read on and find out why it is not so simple. We must find points.
What The AutoLISP Program Does
The AutoLISP program is loaded into AutoCAD. It starts right away. And a closed figure is drawn. Let's call it a room.
Here is the closed figure or the room.
Next there is asked to pick a point in the room. After that has been done, donuts are drawn at the end of the lines and the room is hatched.
This is what you get.
There is a complication. After a point in the room has been picked, donuts are drawn at the end of each line.
When that is done, the room is hatched. Hatching the room is not complicated. It is not really a complication.
The AutoLISP Program
Here is the AutoLISP program.
(defun c:dnsrm (/ pt et ls)
(start)
(drlns)
(setq pt (getpoint "\nPoint in room: "))
(setq et (fndet pt))
(setq ls (fndls et))
(drwdn ls)
(drhtc)
(endpr)
)
(defun start (/ ss p1 p2)
(setvar "cmdecho" 0)
(command "blipmode" "off")
(command "limits" (list 0.0 0.0)
(list 120.0 120.0)
)
(command "snap" "on")
(command "snap" 10)
(command "grid" 10)
(command "zoom" "all")
(command "zoom" "0.8x")
(setq p1 (getvar "vsmin")
p2 (getvar "vsmax")
)
(setq ss (ssget "c" p1 p2))
(if ss
(command "erase" "all" "")
)
)
(defun drlns ()
(command "line" (list 10 10)
(list 30 10)
(list 30 30)
(list 60 30)
(list 60 10)
(list 110 10)
(list 110 110)
(list 10 110)
"c"
)
)
(defun fndet (pt / ds ss)
(setq ds 10
ss nil
)
(while (null ss)
(setq ss (ssget "c"
pt
(polar pt 0 ds)
)
)
(if ss
(setq et (ssname ss 0))
(setq ds (+ ds 10))
)
)
et
)
(defun fndls (et / fe cn el p1 p2 ls ss et pt)
(setq fe et
cn T
el (entget et)
p1 (cdr (assoc 10 el))
p2 (cdr (assoc 11 el))
ls (list p2)
ls (append (list p1) ls)
)
(while cn
(setq ss (ssget "c" p1 p1)
e1 (ssname ss 0)
)
(if (equal e1 et)
(setq et (ssname ss 1))
(setq et e1)
)
(setq el (entget et)
pt (cdr (assoc 10 el))
)
(if (equal pt p1)
(setq p1 (cdr (assoc 11 el)))
(setq p1 pt)
)
(setq ls (append (list pt) ls))
(if (equal et fe)
(setq cn nil)
)
)
ls
)
(defun drwdn (ls / ct)
(setq ct 0)
(while (setq pt (nth ct ls))
(command "donut" 0 2.5 pt "")
(setq ct (1+ ct))
)
)
(defun drhtc ()
(command "-bhatch" "p"
"ANSI31"
50
0
(list 60 60)
""
)
)
(defun endpr ()
(setvar "cmdecho" 1)
(princ)
)
(c:dnsrm)
Next Post
In my next post I'm going to talk more about the AutoLISP program. I'm going to explain what needs to be done.
| Telling
Others
Do you like what you have read? Do you know other people, that could be interested? Could you tell them about this blog? |
| Comment
In the mean time. If you have any questions. Or you want to tell me something. Feel free to add a comment to this blog. I would love to hear from you. And when you come to me with a comment. I will give a reply to your question or remark. |
| Warning Don't spend a lot of money on AutoCAD Light. It is only for creating 2D drawings and it doesn't support AutoLISP. There is a very similar CAD program. And that is completely free. The name of the program? DraftSight. How to get it? Do a search on Google for “download DraftSight”. And you will find where you can download the program. |
| Only
Create Drawings When your CAD operators don't create the borders of your drawings, a lot of time is saved. You get your drawings much faster. I have created a program that does exactly that. An AutoCAD drawing has been created and the program draws a border around it. If you want to see how the program works, go to YouTube. You'll find the working of the program here: http://www.youtu.be/O8Zy6n9zS8Q Now the AutoLISP program gives you the choice to select the size of your border. You can select A4, A3, A2, or A1. Maybe you already know the size of the border of your drawing. Maybe all your drawings have the size A1. If so. Let me know. That is important. The program finds the proper scale of your drawing. Or do you already know what the scale always is? I can write the AutoLISP program that you want. The price? I will only charge you RM 600.-. That is less than US $ 200.-. |
| You are welcome to publish my article provided you include the resource box with links intact. |
| Resource
Box Jos van Doorn is an AutoLISP programmer and blogger. He is originally from Holland and now he lives in Malaysia. He is the founder of the Make AutoCAD Fast business. Make AutoCAD Fast is writing AutoLISP programs for AutoCAD users. Make AutoCAD Fast created an AutoLISP program for drawing a border around AutoCAD drawings. The program can be found on YouTube. http://www.youtu.be/O8Zy6n9zS8Q Jos is writing a blog. In it are AutoLISP programs with information and it is about Make AutoCAD Fast. You can find his blog here: http://www.makeautocadfast.blogspot.com Maybe you have a question. Or want to tell me something. You can contact me on this e-mail address: makeautocadfast@ymail.com |
| This article may be
freely reprinted or distributed in its entirety in any Ezine,
newsletter, blog, or website. As long as the following resource
box is added: ------------------------------------------------- This article is written by Jos van Doorn. He is an AutoLISP programmer who has helped engineering firms and architects to get their AutoCAD drawings fast, without waiting for hours. You can find more valuable information about his business and AutoLISP at his blog. It is here: http://www.makeautocadfast.blogspot.com If you want to contact him. Go to his blog and leave a comment. ------------------------------------------------- |
