**CIGAL Reference Manual, Chapter 6 (RealTime): r_bset**
===== r_bset -- Move a box pointer to an X-Y position =====
**usage: r_bset   opflg eflag ltime Point Box Flag**

R_BSET is a REALTIME operator. It is used to position a rectangular region
for subsequent screen I/O, without itself causing any change to occur on the
screen. R_BSET modifies the coordinates of a rectangular region, BOX, to
correspond to a new screen location specified by POINT.  BOX is a short
integer array with 4 values that define the size of the rectangle (left,
top, right, bottom).  POINT is a short integer array with 2 elements, which
are interpreted as the new X and Y coordinates.

The FLAG argument is a bitflag that provides the following options:
          1 - center the rectangle at the POINT, otherwise the upper left corner
                  of the rectangle is placed at POINT
          
          2 - treat the X,Y values in POINT as relative offsets
          
          4 - treat the X,Y values in POINT as relative offsets, but reverse the
              direction of motion (i.e., treat POINT as -X,-Y)
  
When R_BSET is done the coordinates in the BOX array are updated to reflect
the new position of the rectangle.

**See Also:**\\
[[jvs:cigal:manual:chapter6:r_bput|R_BPUT]],
[[jvs:cigal:manual:chapter6:r_bmove|R_BMOVE]],
[[jvs:cigal:manual:chapter6:r_bdraw|R_BDRAW]],
[[jvs:cigal:manual:chapter6:r_movept|R_MOVEPT]]

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