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undocumented IDL built-in TVRDC
| undocumented IDL built-in TVRDC [message #2308] |
Thu, 09 June 1994 11:29 |
eharold
Messages: 12
Registered: July 1993
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Junior Member |
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I recently ran across what appears to be an undocumented built-in
procedure in IDL 3.5 called TVRDC. I can't find a reference to it anywhere,
but it seems to return the point in the IDL window which the user
clicked. It's syntax is
tvrdc,x,y,/dev
After calling this x and y now contain the x and y coordinates where the
mouse was clicked. Here at NSO we found it useful for a program that
tracks Jupiter's moons between frames. In the picture of Jupiter taken
with the Vacuum Tower Telescope the moons are fairly small, pretty much
single pixel objects so to locate them we just move the mouse and click
on the moon. Has anyone else used this? More to the point is there some
reason it's undocumented? Or is it documented somewhere that I just haven't
been able to find? If you're wondering how I found out about it, I saw it
used in the TVRD userlib procedure.
--
Elliotte Rusty Harold National Solar Observatory
eharold@sunspot.noao.edu Sunspot NM 88349
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