Topic: Pan in two viewports at once?

[Shade]

I would like to write a lisp that allows me to pan in two view ports at once if possible.

Reason:
My grid for my floor plans maybe in one view port and the partial enlargement of plan in another. (refer to attached image)
I want to be able to pan i the partial plan viewport and have the grid viewport follow.

I have some ideas on how to go about the task in pseudo code, but I am little unsure about the viewport info I am trying to manipulate.
Autocad's DXF code help is kinda vague on this subject, so I am fishing for example on manipulating a viewport data.
Any help would be greatly appreciated.

Thanks in advance
Shade 

[ronjonp]

DXF and vports is pretty limited..I'd go the vl route.

[CAB]

Review the code on this thread. It will show you some VP manipulations.

http://www.theswamp.org/index.php?topic=18143.0

I assume you have two VPs one on top of the other?
I suspect you will not be able to do a real time pan for both VPs but pan in one & update the other.
Or use grread or getpoint to pick start & end of pan, then update both VPs.

[Shade]

I assume you have two VPs one on top of the other?

No, that procedure is no no in my books. Viewports can overlap, but one can never be nested in the other. Too hard to manipulate the nested viewport.

I suspect you will not be able to do a real time pan for both VPs but pan in one & update the other.
Or use grread or getpoint to pick start & end of pan, then update both VPs.

Both ideas have been considered and I am perusing the first of panning real time in one and having the other update later.
If it doesn't work I will try the other route.

Thanks for the help! CAB
 

[CAB]

I assume you have two VPs one on top of the other?

No, that procedure is no no in my books. Viewports can overlap, but one can never be nested in the other. Too hard to manipulate the nested viewport.

Oh, I saw one picture & wondered where the other VP was. (Not Shown) 

[CAB]

As you can see from the thread I posted Tim Willey has a lot of knowledge about Viewports.
Be sure to ask if you need further assistance.

[T.Willey]

Thanks for the kind words Alan.

This thread might help also.  It is one to draw a guide of the viewport in model space.
[ http://www.theswamp.org/index.php?topic=9461.0 ]

[Crank]

Look at: Express tools > VPsync.lsp

[CAB]

That won't do what he is after but it is very cool routine.

PS it did lead to this routine: [maybe that is what you intended]
aspace.lsp
ALIGNSPACE
Adjusts a viewport's zoom factor and panning position based on the alignment points specified in model space and paper space.