glEdgeFlagPointer(3)

NAME

       glEdgeFlagPointer - define an array of edge flags

C SPECIFICATION

       void glEdgeFlagPointer( GLsizei stride,
                               const GLvoid *ptr )

       delim $$

PARAMETERS

       stride  Specifies  the  byte offset between consecutive edge flags.  If
               stride is 0 (the initial value), the edge flags are  understood
               to be tightly packed in the array. The initial value is 0.

       ptr     Specifies  a  pointer  to the first edge flag in the array. The
               initial value is zero.

DESCRIPTION

       glEdgeFlagPointer specifies the location  and  data   of  an  array  of
       boolean  edge  flags  to  use when rendering. stride specifies the byte
       stride from one edge flag to the next allowing vertices and  attributes
       to  be  packed into a single array or stored in separate arrays.  (Sin-
       gle-array storage may be more efficient on  some  implementations;  see
       glInterleavedArrays.)

       When  an  edge  flag  array  is  specified, stride and ptr are saved as
       client-side state.

       To enable and disable the edge flag array, call glEnableClientState and
       glDisableClientState  with the argument GL_EDGE_FLAG_ARRAY. If enabled,
       the edge flag array  is  used  when  glDrawArrays,  glDrawElements,  or
       glArrayElement is called.

       Use glDrawArrays to construct a sequence of primitives (all of the same
       type) from  prespecified  vertex  and  vertex  attribute  arrays.   Use
       glArrayElement  to  specify  primitives by indexing vertices and vertex
       attributes and glDrawElements to construct a sequence of primitives  by
       indexing vertices and vertex attributes.

NOTES

       glEdgeFlagPointer  is  available  only  if  the  GL  version  is 1.1 or
       greater.

       The edge flag array is initially disabled and it won't be accessed when
       glArrayElement, glDrawElements or glDrawArrays is called.

       Execution  of glEdgeFlagPointer is not allowed between the execution of
       glBegin and the corresponding execution of glEnd, but an error  may  or
       may  not be generated. If no error is generated, the operation is unde-
       fined.

       glEdgeFlagPointer is typically implemented on the client side.

       Edge flag array parameters are client-side state and are therefore  not
       saved    or    restored   by   glPushAttrib   and   glPopAttrib.    Use
       glPushClientAttrib and
       glPopClientAttrib instead.

ERRORS

       GL_INVALID_ENUM is generated if stride is negative.

ASSOCIATED GETS

       glIsEnabled with argument GL_EDGE_FLAG_ARRAY
       glGet with argument GL_EDGE_FLAG_ARRAY_STRIDE
       glGetPointerv with argument GL_EDGE_FLAG_ARRAY_POINTER

SEE ALSO

       glArrayElement(3G),        glColorPointer(3G),        glDrawArrays(3G),
       glDrawElements(3G),           glEnable(3G),          glGetPointerv(3G),
       glIndexPointer(3G), glNormalPointer(3G), glPopClientAttrib(3G),
       glPushClientAttrib(3G), glTexCoordPointer(3G), glVertexPointer(3G)

                                                         GLEDGEFLAGPOINTER(3G)