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       glRasterPos4f,  glRasterPos4i, glRasterPos4s, glRasterPos2dv, glRaster-
       Pos2fv, glRasterPos2iv, glRasterPos2sv, glRasterPos3dv, glRasterPos3fv,
       glRasterPos3iv,    glRasterPos3sv,    glRasterPos4dv,   glRasterPos4fv,
       glRasterPos4iv, glRasterPos4sv - specify the raster position for  pixel
       operations

C SPECIFICATION

       void glRasterPos2d( GLdouble x,
                           GLdouble y )
       void glRasterPos2f( GLfloat x,
                           GLfloat y )
       void glRasterPos2i( GLint x,
                           GLint y )
       void glRasterPos2s( GLshort x,
                           GLshort y )
       void glRasterPos3d( GLdouble x,
                           GLdouble y,
                           GLdouble z )
       void glRasterPos3f( GLfloat x,
                           GLfloat y,
                           GLfloat z )
       void glRasterPos3i( GLint x,
                           GLint y,
                           GLint z )
       void glRasterPos3s( GLshort x,
                           GLshort y,
                           GLshort z )
       void glRasterPos4d( GLdouble x,
                           GLdouble y,
                           GLdouble z,
                           GLdouble w )
       void glRasterPos4f( GLfloat x,
                           GLfloat y,
                           GLfloat z,
                           GLfloat w )
       void glRasterPos4i( GLint x,
                           GLint y,
                           GLint z,
                           GLint w )
       void glRasterPos4s( GLshort x,
                           GLshort y,
                           GLshort z,
                           GLshort w )

       delim $$

PARAMETERS

       x, y, z, w
                Specify  the  $x$,  $y$,  $z$,  and $w$ object coordinates (if
                present) for the raster position.

PARAMETERS

       v      Specifies a pointer to an array of two, three, or four elements,
              specifying $x$, $y$, $z$, and $w$ coordinates, respectively.

DESCRIPTION

       The  GL  maintains a 3D position in window coordinates.  This position,
       called the raster position, is used to position pixel and bitmap  write
       operations.  It  is  maintained  with subpixel accuracy.  See glBitmap,
       glDrawPixels, and glCopyPixels.

       The current raster position consists of three window coordinates  ($x$,
       $y$, $z$), a clip coordinate value ($w$), an eye coordinate distance, a
       valid bit, and associated color data and texture coordinates.  The  $w$
       coordinate is a clip coordinate, because $w$ is not projected to window
       coordinates.  glRasterPos4 specifies object coordinates $x$, $y$,  $z$,
       and $w$ explicitly.  glRasterPos3 specifies object coordinate $x$, $y$,
       and $z$ explicitly, while $w$ is implicitly  set  to  1.   glRasterPos2
       uses  the  argument values for $x$ and $y$ while implicitly setting $z$
       and $w$ to 0 and 1.

       The object coordinates presented by glRasterPos are treated  just  like
       those  of  a glVertex command: They are transformed by the current mod-
       elview and projection matrices and passed to the  clipping  stage.   If
       the  vertex  is  not  culled, then it is projected and scaled to window
       coordinates, which become the new  current  raster  position,  and  the
       GL_CURRENT_RASTER_POSITION_VALID flag is set.  If the vertex is culled,
       then the valid bit is cleared and the current raster position and asso-
       ciated color and texture coordinates are undefined.

       The  current  raster  position also includes some associated color data
       and   texture   coordinates.    If   lighting    is    enabled,    then
       GL_CURRENT_RASTER_COLOR  (in  RGBA mode) or GL_CURRENT_RASTER_INDEX (in
       color index mode) is set to the color produced by the lighting calcula-
       tion (see glLight, glLightModel, and
       glShadeModel).   If  lighting is disabled, current color (in RGBA mode,
       state variable GL_CURRENT_COLOR) or color index (in color  index  mode,
       state  variable  GL_CURRENT_INDEX) is used to update the current raster
       color.

       Likewise, GL_CURRENT_RASTER_TEXTURE_COORDS is updated as a function  of
       GL_CURRENT_TEXTURE_COORDS,  based on the texture matrix and the texture
       generation functions (see glTexGen).  Finally, the  distance  from  the
       origin  of  the  eye  coordinate system to the vertex as transformed by
       only the modelview matrix replaces GL_CURRENT_RASTER_DISTANCE.

       Initially, the current raster position is (0, 0,  0,  1),  the  current
       raster  distance  is 0, the valid bit is set, the associated RGBA color
       is (1, 1, 1, 1), the associated color index is 1,  and  the  associated
       texture    coordinates   are   (0,   0,   0,   1).    In   RGBA   mode,
       GL_CURRENT_RASTER_INDEX is always 1; in color index mode,  the  current
       raster RGBA color always maintains its initial value.
       raster  position, then call glBitmap with NULL as the bitmap parameter.

       When the GL_ARB_imaging extension  is  supported,  there  are  distinct
       raster  texture  coordinates for each texture unit. Each texture unit's
       current raster texture coordinates are updated by glRasterPos.

ERRORS

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

ASSOCIATED GETS

       glGet with argument GL_CURRENT_RASTER_POSITION
       glGet with argument GL_CURRENT_RASTER_POSITION_VALID
       glGet with argument GL_CURRENT_RASTER_DISTANCE
       glGet with argument GL_CURRENT_RASTER_COLOR
       glGet with argument GL_CURRENT_RASTER_INDEX
       glGet with argument GL_CURRENT_RASTER_TEXTURE_COORDS

C SPECIFICATION

PARAMETERS

PARAMETERS

DESCRIPTION

ERRORS

ASSOCIATED GETS

SEE ALSO