zoom limit?

[cadman6735]

I have wondered this for sometime now and can't figure this one out.

 

Some times I seem to have a zoom limit, that when I wheel out it will just stop, as to say this is as far as you can go buddy. And when I try to pan I get an edge icon with one or two hands that look as if they are pushing against a line, meaning again this is as far as you can go buddy.

 

How can I turn this feature off so I can zoom and pan freely

 

Thanks

[Slaraffenmann]

I have the same problem.

I usually gets back to normal by first using zoom window, and then zoom extends. But why do this happen?

[Cad64]

Once you hit the zoom limit, just REGEN, and then you will be able to zoom further.

[Slaraffenmann]

Ah.. Nice..

That will make my day easier.

[cadman6735]

Nice trick with the regen...

 

I would still like to know how to turn this feature off, I don't remember ACAD doing this in earlier versions.

 

Thanks for the Tip Cad64

[CyberAngel]

It could be that it's a hardware limit. AutoCAD generates a virtual image that you can zoom and pan. If you zoom in or out beyond the resolution of that image, AutoCAD says, "You've zoomed in (or out) as far as possible." A regen regenerates that virtual image at the scale you're currently viewing. So your video card limits the size/resolution of the image. It's not something you can turn off.

 

The reason it didn't happen before? Again, not sure, but AutoCAD may have been more explicit about forcing you to regen.

 

The same happens to me when I have one drawing in state plane coordinates, which can run to 7 digits, and the architect decides to anchor a floor plan at 5,5. Zoom|Extents suddenly gives me two little dots, miles apart, instead of my plan.

[cadman6735]

Nice explanation Cyber

 

Thanks

[Dana W]

It could be that it's a hardware limit. AutoCAD generates a virtual image that you can zoom and pan. If you zoom in or out beyond the resolution of that image, AutoCAD says, "You've zoomed in (or out) as far as possible." A regen regenerates that virtual image at the scale you're currently viewing. So your video card limits the size/resolution of the image. It's not something you can turn off.

 

The reason it didn't happen before? Again, not sure, but AutoCAD may have been more explicit about forcing you to regen.

 

The same happens to me when I have one drawing in state plane coordinates, which can run to 7 digits, and the architect decides to anchor a floor plan at 5,5. Zoom|Extents suddenly gives me two little dots, miles apart, instead of my plan.

 

There were variable auto regens in the older versions (2007 & prior) but I don't recall what triggered them or how to change them.

[BIGAL]

Years ago when graphic cards were dumb some smart ones used the graphics memory to zoom and pan at speed they also used tricks like pick an area which it would remember to redraw at fantastic speed.

 

there are all sorts of mathmatical methods to speed up redrawing and remembering what to display one is when you delete something dont actually remove but redraw it in the background colour and delete later this is faster than redrawing the whole screen.

 

Hence Autocad and your graphics card must work together to achieve an optimum result and the problem of zoom limits is like a garbage collection point and re remember where everything is.

 

I am sure Autodesk probably spends huge sums of money chasing this problem to minimise it using all sorts of tile algorithms and non display of objects.

 

Bottom line is generally the higher the graphic card quality the less regens.