- specify a vertex



C SPECIFICATION


PARAMETERS

       _param1, _param2, _param3, _param4
                                        Specify  x,  y,  z, and w
                                        coordinates of a  vertex.
                                        Not  all  parameters  are
                                        present in all  forms  of
                                        the command.


C SPECIFICATION


PARAMETERS

       _param1
              Specifies  a  pointer to an array of two, three, or
              four elements.  The elements of a two-element array
              are x and y; of a three-element array, x, y, and z;
              and of a four-element array, x, y, z, and w.


DESCRIPTION

       glVertex commands are used within glBegin/glEnd  pairs  to
       specify  point,  line,  and polygon vertices.  The current
       color, normal, and texture coordinates are associated with
       the vertex when glVertex is called.

       When  only  x  and  y are specified, z defaults to 0 and w
       defaults to 1.  When x, y, and z are specified, w defaults
       to 1.


NOTES

       Invoking  glVertex outside of a glBegin/glEnd pair results
       in undefined behavior.


SEE ALSO

       glBegin,  glCallList,  glColor,  glEdgeFlag,  glEvalCoord,
       glIndex, glMaterial,
       glNormal, glRect, glTexCoord, glVertexPointer



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