IGCUR-Use cursor to show X, Y and data values

Description:

Interative task to determine pixel values in a dataset. This task can be used to mark points to be used by other tasks.

Parameters:

No user parameters.

See also:

FIGARO: ICUR.
KAPPA: CURSOR, INSPECT, PICCUR.

Source comments:

 I G C U R

 Services an 'IGCUR' command.   Displays position and
 data value on the image display, depending on cursor position.

 Command parameters, keywords - None

 User variables used -   (">" input, "<" output)

 (>) IMFILE    (Character) The name of the data currently
               displayed.  Set by IGREY or similar.
 (>) PGENVARG  (Numeric array) The argument list for PGENV that was
               used in displaying the image.
 (<) XPIXELS   (Numeric) The pixel numbers in X for the
               points indicated by the cursor.
 (<) YPIXELS   (Numeric) The pixel numbers in Y for the
               points indicated by the cursor.
 (<) NPIXELS   (Numeric) The number of points selected by
               the cursor.  Note: if no points are selected,
               the values of NPIXELS, XPIXELS and YPIXELS
               are left unchanged.

                                      KS / CIT 20th March 1984