glEnableClientState, glDisableClientState - enable or
disable client-side capability

glDisableClientState
	glDisableClientState(array) -> None
glEnableClientState
	glEnableClientState(array) -> None

void glEnableClientState( GLenum cap )

cap  Specifies the capability	to enable.  Symbolic constants
     GL_COLOR_ARRAY, GL_EDGE_FLAG_ARRAY, GL_INDEX_ARRAY,
     GL_NORMAL_ARRAY,	GL_TEXTURE_COORD_ARRAY,	and
     GL_VERTEX_ARRAY are accepted.

void glDisableClientState( GLenum cap	)

cap  Specifies the capability	to disable.

glEnableClientState and glDisableClientState enable or
disable individual client-side capabilities. By default, all
client-side capabilities are disabled.  Both
glEnableClientState and glDisableClientState take a single
argument, cap, which can assume one of the following values:

GL_COLOR_ARRAY	   If enabled, the color array is
                         enabled for writing and used	during
                         rendering when glDrawArrays or
                         glDrawElement is called. See
                         glColorPointer.

GL_EDGE_FLAG_ARRAY	   If enabled, the edge	flag array is
                         enabled for writing and used	during
                         rendering when glDrawArrays or
                         glDrawElements is called. See
                         glEdgeFlagPointer.

GL_INDEX_ARRAY	   If enabled, the index array is
                         enabled for writing and used	during
                         rendering when glDrawArrays or
                         glDrawElements is called. See
                         glIndexPointer.

GL_NORMAL_ARRAY	   If enabled, the normal array	is
                         enabled for writing and used	during
                         rendering when glDrawArrays or
                         glDrawElements is called. See
                         glNormalPointer.

GL_TEXTURE_COORD_ARRAY   If enabled, the texture coordinate
                         array is enabled for	writing	and
                         used	for rendering when
                         glDrawArrays	or glDrawElements is
                         called. See glTexCoordPointer.

GL_VERTEX_ARRAY	   If enabled, the vertex array	is
                         enabled for writing and used	during
                         rendering when glDrawArrays or
                         glDrawElements is called. See
                         glVertexPointer.

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

GL_INVALID_ENUM is generated if cap is not an	accepted
value.

glEnableClientState is not allowed between the execution of
glBegin and the corresponding	glEnd, but an error may	or may
not be generated. If no error	is generated, the behavior is
undefined.

glArrayElement, glColorPointer, glDrawArrays,
glDrawElements, glEdgeFlagPointer, glEnable, glGetPointerv,
glIndexPointer, glInterleavedArrays, glNormalPointer,
glTexCoordPointer, glVertexPointer