dview twist or mvsetup?

[cdoss]

I have always used dview twist to set up my viewports and to look at my site in model space in the same orientation as it will be plotted. For instance, I might have a water main along a road that runs north-south. To fit the paper better, I'll dview twist inside the viewport 90-degrees. Then I'll pop back into model space and do a dview twist there as well so that I can see things more the way they will end up on the prints. I also tend to set my ucs to "view" so that I can dimension, add mtext, etc.

I'm now being told that this method causes crashing in drawings with more c3d items and that I should learn to use mvsetup.

Mvsetup works fine to get my viewport the way I want it. I can't seem to figure how to use it in model space though.

Anyone else convert from dview twist to mvsetup? Is there another command I'm missing?

[gandocadguy]

I use 3 point UCS and then set my veiwport to that. I can switch back and forth whenever I want.

[bhaugi]

Dview twist vs. UCS is one of those things that can cause passionate disputes. Generally whatever people learned and have used forever they naturally prefer. They both have their pros and cons.

I like 3 point UCS, or you can draw a line and use UCS Entity. Then use the "PLAN" command and "CURRENT" to rotate the view on your screen. When you create the UCS, give it a name. For true coordinates, just type UCS world, for plan view, UCS Restore and the name you gave it.

One real advantage is that your ortho and text angles all work unlike DVIEW Twist with crosshairs rotated. The only disadvantage is that coordinates look wrong until you enter UCS World.

[tedg]

I think you'll find most people designing within a coordinate system use dview twist (civil and survey usually), as it keeps the UCS in "world" (WCS) and you're basically only rotating your view of the model keeping the coordinate system in tact. In allot of cases they use "snapang" to rotate the curser to work parallel to the plan.

I've used dview twist in the past, but I usually manipulate the UCS and set my plan to that.
I use the 3 point method as mentioned before in this thread as well as some lisp routines that quickly change my UCS and/or view angles.

[gandocadguy]

I do civil and have used the 3 point or object ucs as I mentioned before. I've found Dview to be slow with large files. IMO, Your model should only be rotated in your sheet anyway thus coordinates only matter for lables and inserting new xrefs. Which you can easily switch back to world.

[sinc]

That's a matter of preference.

We use DView TWist, because there is less chance of error, and modelspace looks like paperspace. Using a UCS in paperspace viewports works, but you must remain conscious of the fact that paperspace is a UCS, and remember there are things you shouldn't do there. Some people don't mind that; we prefer to use DView TWist.

We have noticed no performance problems doing this. Change the SNAPANG, and ORTHO works fine. Versions before 2009 had a problem with C3D points not rotating correctly, but that problem no longer exists in the 2009 version.

The only annoyance is using MTEXT or MLEADERs. They still want to orient to the UCS. So I actually added something to the Sincpac-C3D that automatically orients MTEXT and MLEADERs to the DView TWist instead of the UCS, and now everything works very well.

But either method works fine, as long as you keep in mind the caveats of a rotated UCS.

And of course, it is better to pick one, and use only one. If you mix-n-match, your chances of someone doing something bad in a twisted UCS go up considerably.

[tedg]

Originally Posted by sinc

....
But either method works fine, as long as you keep in mind the caveats of a rotated UCS.

And of course, it is better to pick one, and use only one. If you mix-n-match, your chances of someone doing something bad in a twisted UCS go up considerably.

Good point, I've actually had people come to me asking for help because they couldn't figure out why their cursor was at funny angles. They had a rotated view, rotated ucs and a rotated snap angle all at once.

This would be ok if you mean to do it and know what you're getting into.
Sometimes I think AutoCAD gives inexperienced users too many tools to get in trouble with .