AIPS HELP file for REBOX in 31DEC20
As of Tue Jul 7 4:09:15 2020
REBOX: Verb to reset boxes with TV cursor & graphics display.
$ Input and Output adverbs:
NBOXES $ 0.0 50.0 Number of boxes to set 0 => 1
CLBOX $ -1.0 8192.0 Pixel locations (X,Y) in
$ image of lower left corner
$ and upper right corner of
$ NBOXES windows.
Uses TV cursor to select the image with which the
BOXes are associated (if needed). Other input is from
TV cursor. See HELP REBOX or the terminal (during
execution) for instructions.
Use: To reset values in the adverb CLBOX using the TV cursor with a TV
graphics display of the CLBOXes as they are being reset. The
terminal will issue instructions. If there is more than one
image on the TV, the routine asks the user to point out the image
with which to convert the input values in CLBOX to TV pixels for
the initial display of the boxes. The routine begins in a
"search" mode. In this mode, move the cursor to any lower left
or upper right corner of any rectangular box or the center or any
point on the circumference of any circular box. Then press
button A or B to reset that corner. Or push button C to start a
new box or D to exit. While resetting a corner, button A marks
the current corner and switches to the other corner of the
current box (or switches between setting the radius and the
center of the current circular box). Buttons B and C mark the
current point, with B then creating a new box and C reverting to
the search mode leading to the resetting of another box, and
button D exits. The number of boxes may be increased during
REBOX. NOTE: use TVBOX to set the values of CLBOX initially. Or
use REBOX with NBOXES set to 0. NOTE: all initial boxes do not
need to be visible on the TV screen (if it is at its full
expansion). Only those that are fully visible may be altered
however, although partially visible boxes will be displayed.
This allows the setting of boxes on image too large to fit on the
TV all at one time without forcing you to use TXINC and TYINC
greater than 1.
NBOXES......Number of boxes set before hand and the number set
CLBOX.......Input and Output adverb: CLBOX(a,1:NBOXES) where a=1 is
lower left x pixel, a=2 is lower left y pixel, a=3 is
upper right x pixel, and a=4 is upper y pixel. For
circular boxes, a=1 is -1, a=2 is the radius in pixels,
a=3 is the center x pixel and a=4 is the center y pixel.
On input, all must have legitimate values for pixels
in the image although not necessarily currently displayed
on the (full screen) TV.