topic Re: Jagged lines in AutoCAD LT Forum

Jagged lines

Anonymous — Tue, 28 Oct 2003 21:58:10 GMT

I am new to Autocad. I am wondering if it is normal for the lines to be jagged. Vertical and horizontal lines are straight but the angular ones are jagged, Stair step looking whatever you would call it. It makes the stuff I draw look like (edited) .Especially the low angle stuff.
ThanksBrandon

Re: Jagged lines

Anonymous — Wed, 29 Oct 2003 00:16:36 GMT

Welcome to the world of Autocad, friend.
Actually, the problem is probably not AutoCAD, but your graphics card, and the resolution settings of same. Also, you could try 'viewres' in autoCAD and up the number from the preset 100 to 10000, but I don't suppose it will help.

D.A.

Re: Jagged lines

Anonymous — Wed, 29 Oct 2003 05:50:49 GMT

Windows display settings?
Graphics card?
Monitor?

--
Dean Saadallah
Add-on products for LT
http://www.pendean.com/lt
--

Re:

Anonymous — Wed, 29 Oct 2003 06:59:07 GMT

What is the recommended hardware and settings for optimal performance in LT?

"Dean Saadallah" wrote in message
news:1C4C540A000D074123269CC924AD5CE5@in.WebX.maYIadrTaRb...
> Windows display settings?
> Graphics card?
> Monitor?
>
> --
> Dean Saadallah
> Add-on products for LT
> http://www.pendean.com/lt
> --
>
>

Re:

Anonymous — Wed, 29 Oct 2003 07:29:22 GMT

http://usa.autodesk.com/adsk/servlet/index?siteID=123112&id=2498406

--
Dean Saadallah
Add-on products for LT
http://www.pendean.com/lt
--

Re: Jagged lines

Anonymous — Wed, 18 Jan 2012 05:28:42 GMT

I know this is a very old question.. I recently had the same problem of jagged lines.. I resolved this problem by going to 3dconfig in autocad command promt. In the dialog box ( adaptive degradation and performance tuning ) select manual tune and change the settings..

smooth display from off to on

if unchecked , select smooth faces by default

change dynamic tessellations - curves - push slider to high detail more memory

Hope this suggestion helps others who are facing the same problem.

Changing the resolution of the monitor was not an option since it was already in the highest resolution possible for the monitor. A few specs in case it helps others - my monitor is a led monitor . The software is Autocad 2012 and I have hardware acceleration enabled.

Regards,

snzac

Re: Jagged lines

Charles_Shade — Wed, 18 Jan 2012 11:14:32 GMT

You say it is an LED monitor

What is the connection to the CPU?

Analog or Digital?

And if Digital is it HDMI or DVI?

And is the graphics card in the CPU the same?

Re: Jagged lines

Anonymous — Wed, 01 Feb 2012 06:52:48 GMT

Hi! Charles,

Sorry for not replying earlier.. I didn't have email intimation enabled.. I am not too familiar with the hardware side but from what I could figure out (visually/graphics card specs) the connection is DVI in both led monitor and the graphics card .The graphics card is from nvidia. I was trying for quite a few days to find a solution to the problem of jagged lines and this above mentioned method helped me out.I mentioned the hardware specs in case that had some connection to the problem.

Regards,

snzac

Re: Jagged lines

Charles_Shade — Wed, 01 Feb 2012 12:40:52 GMT

The resolution could be at its highest but not necessarily the native resolution.

Have you tried other resolutions to see if this goes away?

Resolutions are not linear. Most see a problem with circles being ovals with a non-native resolution.

Re: Jagged lines

Anonymous — Wed, 01 Feb 2012 14:04:43 GMT

I did try other resolutions but it had no effect. The native resoultion is the highest one in my monitor which was my default setting. My problem was just like zoid described above. The horizontal lines were straight, but any angular lines would have jagged effect. After changing the 3d config settings the angular lines now appear smooth and I have not experienced any other problems. May be it had something to do with anti-alias which was corrected by changing the smooth settings. Not being a technical person,I cannot confirm it is linked to anti-alias.

Regards,

snzac

Re: Jagged lines

pendean — Wed, 01 Feb 2012 14:52:31 GMT

"..After changing the 3d config settings..."

Why was it set that way to start with?

Re: Jagged lines

Anonymous — Thu, 02 Feb 2012 08:05:58 GMT

Please read my earliest reply. The default setting was without smoothing. I think you will have to ask autodesk why it was so.I tried changing the settings for 3dconfig with a hope it would have some difference to the jagged lines and it worked.I had previously tried the methods suggested in this page and other pages without success. I am happy that my problem of jagged lines was resolved by changing the settings and thought that by sharing a method that works for me , it could be used by others for whom a similar problem may occur.

Regards,

snzac

Re: Jagged lines

heinsite — Thu, 02 Feb 2012 08:57:20 GMT

Welcome to the world of "aliasing". Here's the formal definition:

aliasing

(1) In computer graphics, the process by which smooth curves and other lines become jagged because the resolution of the graphics device or file is not high enough to represent a smooth curve. Smoothing and antialiasing techniques can reduce the effect of aliasing.

Dave.

Re: Jagged lines

Anonymous — Thu, 02 Feb 2012 10:09:41 GMT

Thanks for the definition Dave..

Regards,

snzac

Re: Jagged lines

Anonymous — Wed, 04 Sep 2019 17:38:08 GMT

Interesting to be resurrecting a 7 year old thread, thanks for posting this solution. Just installed Autocad 2020, and the jagged lines were driving me nuts. The smooth lines in graphics config box was not checked by default. Also the Video Caching Level was at 0. Odd that those are the defaults, it makes the program seem very outdated to default to jagged.

Re: Jagged lines

Anonymous — Fri, 06 Sep 2019 04:27:49 GMT

You are welcome Ike. 🙂

Re: Jagged linesd

Anonymous — Thu, 19 Sep 2019 08:45:58 GMT

It worked! Thank you for sharing!