glMatrixMode(3G)

NAME
     glMatrixMode - specify which matrix is the current matrix


C SPECIFICATION
     void glMatrixMode( GLenum mode )


PARAMETERS
     mode  Specifies which matrix stack is the target for subsequent matrix
           operations.  Four values are accepted:  GL_MODELVIEW,
           GL_PROJECTION, GL_TEXTURE, and GL_COLOR (if and only if the
           SGI_color_matrix extension is supported).  The initial value is
           GL_MODELVIEW.

DESCRIPTION
     glMatrixMode sets the current matrix mode.  mode can assume one of four
     values:

     GL_MODELVIEW        Applies subsequent matrix operations to the modelview
                         matrix stack.

     GL_PROJECTION       Applies subsequent matrix operations to the
                         projection matrix stack.

     GL_TEXTURE          Applies subsequent matrix operations to the texture
                         matrix stack.

     GL_COLOR            Applies subsequent matrix operations to the color
                         matrix stack.  This option is available only if the
                         SGI_color_matrix extension is supported.

     To find out which matrix stack is currently the target of all matrix
     operations, call glGet with argument GL_MATRIX_MODE. The initial value is
     GL_MODELVIEW.

ERRORS
     GL_INVALID_ENUM is generated if mode is not an accepted value.

     GL_INVALID_OPERATION is generated if glMatrixMode is executed between the
     execution of glBegin and the corresponding execution of glEnd.

ASSOCIATED GETS
     glGet with argument GL_MATRIX_MODE


MACHINE DEPENDENCIES
     RealityEngine, RealityEngine2, and VTX systems do not support color
     matrix transformations on images as they are loaded to or read back from
     texture memory.
SEE ALSO
     glLoadMatrix, glMatrixMode, glPixelTransfer (for information about the
     color matrix stack), glPushMatrix