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SUPPORT /CURSOR

        [CLEAN\]SUPPORT /CURSOR

    With  option /CURSOR, SUPPORT calls the interactive cursor to define the
    polygon summits.  Type any key to go to next summit, D  to  correct  the
    last one and type E to end the polygon definition. The last polygon side
    will then appear. The polygon definition may be aborted by typing Q. For
    graphical displays, you may use the mouse buttons for the commands.  The
    left mouse button draws a vertex, the middle mouse  button  deletes  the
    last vertex, and the right mouse button ends the polygon definition.

    The resulting support is available in the Sic structure SUPPORT:
      - SUPPORT%NXY  [Integer]  Number of summits
      - SUPPORT%X    [Double]   X coordinates
      - SUPPORT%Y    [Double]   Y coordinates


Gildas manager 2023-06-01