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drawing lines interactively [message #30541]

Fri, 03 May 2002 09:22

maarten
Messages: 30
Registered: April 2002

Member

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,
Mï¿½rten Blixt

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