Arc become sharp right-angle

[Jack Cheong]

I;m using AutoCAD 2010
When I save a current open drawing to the different name, all the round corners become sharp right-angle
But if I do the same thing on other PC, this is not happen.
Anyone know why?
thxs n rgds

Jack Cheong

[Tom Beauford]

Hopefully just a display issue.
Options => Display Tab => Set "Arc and circle smoothness" to 100 and "Segments in a polyline curve" to 8.
Does it list or plot ok? What version of AutoCAD is having the problem?

[scott.wilcox]

Like Tom said, it's probably the tessellation of curves.

A REGEN should make the corners smooth again. I typically set VIEWRES to 2500, instead of the default 100, though.

[irneb]

Like Tom said, it's probably the tessellation of curves.

A REGEN should make the corners smooth again. I typically set VIEWRES to 2500, instead of the default 100, though.Yep, the 100 comes from the old 386 days when you were lucky to have 4MB RAM and a screen card which could handle 16 colours :mrgreen:

Nowadays you shouldn't see much performance loss by upping that figure. But still you'll find arcs, circles, curved polylines / splines becoming jagged if you have to zoom close to the limits of the virtual screen ACad renders each time a regen is done. A Regen basically generates the drawing as if your screen is about 4 times as large and about 4 times as fine as it truly is. This when you do a scroll zoom or pan it basically just moves an immages around or zooms in/out. But seeing as a circle showing as just a few pixels can't really be considered a circle when zoomed up close, you need another regen to show it in finer detail.

But then you would need another regen to zoom back to your original view again. Usually with regenauto this happens without you even knowing about it. Unless you use the scroll wheel zoom/pan which sticks at the limits of the current virtual screen.

Edit: This is probably a very simplistic explanation, but tells you why this happens.

[Jack Cheong]

Hopefully just a display issue.
Options => Display Tab => Set "Arc and circle smoothness" to 100 and "Segments in a polyline curve" to 8.
Does it list or plot ok? What version of AutoCAD is having the problem?

This display setting are: "Arc and circle smoothness" : 1000 and "Segments in a polyline curve" to 8. So it should be better.
I also try regen, but not working
BTW, that is the block object, but if I saved as another name the round corner should be the same
rgds

Jack Cheong

[Tom Beauford]

Does it list or plot the same as in the origional drawing? If so then it's a display problem. What version of AutoCAD is having the problem? If those were references instead of blocks a different version might be found by the other setup. Are the corners on or 3d object?

[Richard.Kent]

I;m using AutoCAD 2010
When I save a current open drawing to the different name, all the round corners become sharp right-angle
But if I do the same thing on other PC, this is not happen.
Anyone know why?
thxs n rgds

Jack Cheong

Make sure SHADEMODE is set for 2D.

[Jack Cheong]

Does it list or plot the same as in the origional drawing? If so then it's a display problem. What version of AutoCAD is having the problem? If those were references instead of blocks a different version might be found by the other setup. Are the corners on or 3d object?

Yes! It's plot the same
I'm using ACAD 2010 as I mention, both save as same version
I think someone had change the setting of ACAD, but I don't know what they change? Thai is the reson why in a PC it show sharp corner, but another show rnormal as round corner
This is a 3D solid and insert as a block
rgds

Jack Cheong

[irneb]

Check the difference between the 2 PC's 3D Performance settings: Options --> System --> Performance Settings (button). What's happening to the adaptive degradation, and also check under the Manual Tune if there's anything different there. Also ensure you've got the latest recommended driver for your screen card as per ADesk's site ... note the absolute newest (from the vendor) is not necessarily the best - rather use the recommended one from ADesk, it would be tested to work well with ACad.

Also in the options dialog, Display tab, check what the "Contour lines per surface" (ISOLINES sysvar) is set to. Default is 4. Maybe if you increase this it could help.