rightb(3G)

NAME
     leftbu, rightb - enables and disables drawing to the left/right buffer

FORTRAN 77 SPECIFICATION
     subroutine leftbu(bool)
     logical bool

     subroutine rightb(bool)
     logical bool

PARAMETERS
     bool   is either .TRUE. or .FALSE..

            .TRUE. enables updating the left/right buffer.

            .FALSE. disables updating the left/right buffer.

     By default, leftbu is TRUE and rightb is FALSE.

DESCRIPTION
     The normal framebuffer can be configured for stereo buffering (see
     stereo).  When this is done in single buffer mode, two color buffers are
     created, one for the left-eye view and one for the right-eye view.  When
     this is done in double buffer mode, four color buffers are created:
     front-left, front-right, back-left, and back-right.  In single buffer
     mode leftbu controls whether drawing is enabled in the left buffer, and
     rightb controls whether drawing is enabled in the right buffer.  In
     double buffer mode, the front-left buffer is enabled for drawing if both
     frontb and leftbu are true, and the back-left buffer is enabled for
     drawing if backbu and leftbu are true.  Likewise, the front-right buffer
     is enabled for drawing if both frontb and rightb are true, and the back-
     right buffer is enabled if both backbu and rightb are true.

     leftbu and rightb are ignored when the normal buffer is not configured
     for stereo buffering.

     leftbu and rightb, should be called only while the draw mode is NORMAL.

     After each call to gconfi, leftbu is enabled and rightb is disabled.

SEE ALSO
     backbu, frontb, monobu, stereo

NOTES
     IRIS-4D G, GT, GTX, VGX, and VGXT models, the Personal Iris, Indigo
     Entry, Indy, XL, XS, XS24, XZ, Elan and Extreme systems do not support
     leftbu or rightb.

     At most four color buffers, such as front-left, front-right, back-left,
     back-right, and zdraw, can be rendered into simultaneously on the IRIS-4D
     RealityEngine model.