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Re: drawing lines interactively [message #30540 is a reply to message #30538] Fri, 03 May 2002 09:33 Go to previous message
nobody@nowhere.com (S is currently offline  nobody@nowhere.com (S
Messages: 55
Registered: July 2001
Member
you could just use the ANNOTATE widget, which will let you draw text, lines,
etc. on the current graphics window interactively, and export to postscript
or bitmap.

On Fri, 3 May 2002 16:22:06 +0000 (UTC), Marten Blixt
<maarten@blues.phys.uit.no> wrote:
> Hi all,
>
> I have a small problem which I've solved only partially.
>
> I would like to draw a line on an image using the mouse, by clicking on the
> two end points.
> Sofar I can do just that, by using
> TV,testimage,TRUE=1
> CURSOR, x0,y0,/DEVICE,/DOWN
> CURSOR,x1,y1,/DEVICE,/DOWN
> PLOT,[x0,x1],[y0,y1], /DATA,/NOERASE
>
> but then the line appears *after* the two endpoints have been choosen, and I
> would like a "temporary line", between the first point and the current position
> of the cursor, to be shown. This should help me in positioning the last point.
>
> There is probably a simple solution to this, I just haven't found it. Does any
> of you know how?
>
> Many thanks,
> M�rten Blixt


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