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 From:  Michael Gibson
5391.7 In reply to 5391.6 
Hi Burr, yeah so like I wrote above the turning off object snaps thing will only have an impact in this area when you are in a drawing command, not while you are in "selection mode".

So just let me clarify, please try this:

With a maximized viewport, draw your sphere, then start the Line command.

While inside the Line command test doing the simultaneous motion with object snap turned on file a while (here you see the lag, is that correct), and then try the simultaneous motion for a while with object snap turned off. What happens with it turned off, does it behave very different?

That test should be done all while running inside of a drawing command that picks points like the line command.

If you see very different behavior with object snap on versus object snap off (again I'm just talking about within a drawing command), then that likely points to somewhat sluggish performance in reading data back from your video card.

- Michael
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 From:  BurrMan
5391.8 In reply to 5391.7 
Hi Michael,
So I just want to be sure you understand. Using your last scenario, isnt the issue.

I perform your last scenario of drawing a sphere and starting the line command. I "Do" see a performance difference with snaps on and off, but it is very slight, and on my part, expected and "works fine".

Here's the difference:

Turning on a command, actually "fixes" the issue I was refering to. With just a sphere, and "no command running" (Selection mode), the erratic behavior is present. The rotation and panning "jumps" with large delays in movement (When doing simultaneous movement) In a single maximized viewport only (all of them, whether its front,back or 3d etc)

So to recap, Only in selection mode with a 3d object, not performing anything other than navigation with simultaneous device movement.
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 From:  Michael Gibson
5391.9 In reply to 5391.8 
Hi Burr, thanks for the additional explanation.... That's kind of mysterious though that it only happens in selection mode.

One thing that I don't quite follow is actually why you would want to do that - what are you trying to do where you find yourself moving both the view and the mouse at the same time, isn't it hard to select objects at the same time that your view is changing?

- Michael
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 From:  BurrMan
5391.10 In reply to 5391.9 
It's more about trying to be "expert" with my 3d navigator. For instance, using the curve tool, then drawing and rotating around the sphere for various pick points! Using my spacenavigator at the same time as drawing and constructing, with 2 hands, in the 3d viewport...

But it is a bit unconventional, and not a normal workflow for me. Hence I didnt want to push for totally figuring it out. I was looking to see if it was a simple explanation found with some understanding of the underlying process.

It may very well be limited to "only my system", in which case, a bunch of time doesnt need to be wasted on why, what etc. on your end.
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 From:  Michael Gibson
5391.11 In reply to 5391.10 
Hi Burr,

> For instance, using the curve tool, then drawing and rotating
> around the sphere for various pick points!

Does that particular one actually work ok for you though? The curve tool is in a drawing command, not selection mode...

- Michael
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 From:  BurrMan
5391.12 In reply to 5391.11 
Yes, that was the revalation during this discussion.... My first impression just came at initial launch after updating my SN device drivers..... So, outside of a command, I just need to flick the mouse out of the viewport....... :)
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