blink(3g) — 4D1 2.0



     blink(3G)                                               blink(3G)



     NAME

          blink - changes a color map entry at a selectable rate


     SPECIFICATION

          C         blink(rate, i, red, green, blue)

                    short rate, red, green, blue;

                    Colorindex i;

                    short red, green, blue




          FORTRAN   subroutine blink(rate, i, red, green, blue)

                    integer*4 rate, i, red, green, blue


     DESCRIPTION

          blink specifies blink rate, color map index, and red, green,

          and blue values.  rate is measured in terms of vertical

          retraces.  The system updates the color located at index i

          in the current color map according to rate.  For example, if

          rate is 3, the color changes (blinks) every third vertical

          retrace.  Its value alternates between the original value

          and the new value supplied by red, green, and blue.  The

          length of time between retraces varies according to the

          monitor used.  On the standard 60Hz monitor, there are 60

          retraces per second.  When using this monitor, a rate of 60

          would cause the color to change once every second.


          Up to 20 colors can blink simultaneously, each at a

          different rate. You can change the blink rate by calling

          blink with the same i and a different rate. To terminate

          blinking and restore the original color when i specifies a

          blinking colormap entry, call blink with rate = 0.  To

          terminate all blinking colors simultaneously, call blink

          with rate=-1.  When you set rate to -1, the other parameters

          are ignored.


     SEE ALSO

          mapcolor, color


          Programming Guide, Section 6.2, Color Map Mode


     NOTE

          This routine available only in immediate mode.













     Page 1                                          (printed 8/20/87)
Museum
