                                                                bridge_gap
Chapter 9 Input Modes

This is  a mode-setting command intended for use as a raster editing tool.
It's primary purpose is to allow the user to close the gap between two spur
endpoints with a straight line of pixels.

bridge_gap

    Sets the mode to bridge_gap to close line breaks.

         bridge_gap

    Sets the graphic input mode to bridge_gap.  When in this mode, a start or
    continue command will cause the program to search a square area (up to the
    header file search_radius value in pixels) for the closest two spur
    endpoints.  If two endpoints are found, then they are connected with a
    straight line.  This command is used for closing line breaks on thinned
    raster data.  Assembly is not required.  Note that the current mode/action
*   is displayed in the upper-left corner of the screen.  NOTE: the grow_spurs
*   command uses the same logic, but automatically applies it to all raster
*   spurs on the map.
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    Options/arguments:

         None.
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    Example(s):

    To connect a line break near pixel coordinates x=125 and y=482, enter:
     
         bridge_gap 
         start 125 482 (or continue 125 482)
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    See also:

*             continue, header, start, grow_spurs
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