LWDISPLAY in AUTOCAD 2007. Why is it changed?

[riga]

Hi to everybody.
I'm a civil engineer from Switzerland.
As you can see is my first post. I have tried to find the answer to my question with a quick search trough the forum but can't find it.
Here's my question:
In autocad 2004 if you draw a line or pline and you give it the linetype DOT or DOT2X and the lineweight 1.0 mm, when you activate LWDISPLAY you will see the dots of the line with the weight you give to the line.
Now, I have noticed that in autocad 2007 (and autocad 2006 seems to have the same "problem")even if LWDISPLAY is on the lines with dot linesyles remain the same as when LWDISPLAY is off and changes only when you go over them with the crosshair.
What is changed in the display mode? There is a variable that can be set so that I can see the lineweight of dot linetype as I did before?

PS: sorry for my bad english...

[jdkriek]

Type RE to regenerate when this happens =)

[riga]

It does not change the visualisation to regen the draw.
If you use Autocad 2008 you should have the same problem (well, it's a problem for me). If you draw a line and you assign it the linetype DOT2 (or DOT) and a lineweight of 1.00 mm, then you set LWDISPLAY on and regenerate: in my display I still see the line rappresented with very small dots and no weight is showed.
In autocad 2004 the linweight was clearly visible.
Anyway thanks for your answer

[jdkriek]

Yes I have seen it. All I do to fix this is deselect the line, then zoom out and regen a few times (three or four times). ZOOM > ALL --- REGENALL. You might also assign DOT2 and 1.00 mm to a layer and change the line properties for Lineweight and Linetype to ByLayer. Then Regen.

[ReMark]

"Zoom out...regen a few times...Zoom...All...Regenall".

Seems like a lot of hassle just to obtain the desired affect.

[ReMark]

riga:

Type LWDISPLAY. The default is set to OFF or 0 (zero). Reset this to ON or 1. Your lineweights should now display as you were used to.

[jdkriek]

Type LWDISPLAY. The default is set to OFF or 0 (zero). Reset this to ON or 1. Your lineweights should now display as you were used to.

If you read the first post, he has done this already...


... even if LWDISPLAY is on the lines with dot linesyles remain the same as when LWDISPLAY is off and changes only when you go over them with the crosshair ...

Besides, this issue cannot be resolved with LWDISPLAY. It has something to do with the system needing to be regenerated, hassle or not.

[riga]

Yes I have seen it. All I do to fix this is deselect the line, then zoom out and regen a few times (three or four times). ZOOM > ALL --- REGENALL. You might also assign DOT2 and 1.00 mm to a layer and change the line properties for Lineweight and Linetype to ByLayer. Then Regen.

After many attempt I resign.
It's true that zooming out and then regenerating has the effect that the line (the one with linetype Dot) will appear with the lineweight, but zooming in it looks like it is a continous line.
Totally different than it was with Autocad 2004.
If someone has the 2 versions both installed (2004 and 2007/2008) he can do a test and will notice what I mean.
I use LWDISPLAY not that often, but in any case it was usefull sometimes to give a check at the lineweights before to plot the draw... Now with new versions is a bit more complicated and that' annoying :glare:
Thanks for support to all :)

[Alan Cullen]

This is totally out of left field.......try resetting ltscale......to an appropriate size (number).......

[ReMark]

What can I say? I'm wrong...again. An occupational hazard of typing without glasses, in the dark, with the monitor off on a moonless night.

Funny...when I toggle LWT in 2007 my lineweight displays (we're talking now in model space) just fine.

[jdkriek]

What can I say? I'm wrong...again. An occupational hazard of typing without glasses, in the dark, with the monitor off on a moonless night.

Granted I only knew I was right, because I purposely sought out to duplicate his issue. I've experienced similar behavior in my own work, but never think twice about just regenerating. It's a given.


Funny...when I toggle LWT in 2007 my lineweight displays (we're talking now in model space) just fine.

And it will, until AutoCAD decides otherwise, ha! A regeneration occurs when AutoCAD goes back to the DWG file and reconverts the high-precision numbers to the less-precise integer numbers that it uses for display purposes. In the process, AutoCAD detects what objects have changed and need to be displayed with their new positions, colors, or linetypes. Normally, AutoCAD picks up on these changes automatically as you go, but in a few cases — again for performance reasons — it takes a regeneration to display them.

[riga]

This is totally out of left field.......try resetting ltscale......to an appropriate size (number).......

There's no problem with LTSCALE. The line and its dots looks just perfect when LWT is of. When I turn it on the line and its dots doesn't change the outlook even if they should (lineweight is set to 1.0 mm).
Zooming out and regenerating the draw has the effect to show the weight, but then when I zoom back dots are not more visible.
New regeneration: dots riapear and weight disapear.

I am looking for a variable introduced in 2006 (first version with this problem) that controls the display of lineweight, but until now I found nothing

[Norts]

after having a quick look through the autocad help file, it appears that the dots that display when using any linetype that contains dots (dots, dots2, dotsx2, etc etc) are made up of a single pixel. all other graphical objects are made up of multiple pixels, and thus dots can no longer display lineweight.
try inserting a point, and then assigning a lineweight to it. it's lineweight will never display effectively on screen. they will only become apparent post-printing/plotting.

a snippet from the help-file:
Lineweights are width values that are assigned to graphical objects as well as some types of text.
TrueType fonts, raster images, points, and solid fills (2D solids) cannot display lineweight. Wide polylines show lineweights only when displayed outside of the plan view.
In model space, lineweights are displayed in pixels and do not change when zoomed in or out. Thus, you should not use lineweights to represent the exact width of an object in model space.
You can also plot objects in your drawing with custom lineweight values.