glEdgeFlagPointer(3G)	       OpenGL Reference		 glEdgeFlagPointer(3G)

NAME    [Toc]    [Back]

     glEdgeFlagPointer - define	an array of edge flags

C SPECIFICATION    [Toc]    [Back]

     void glEdgeFlagPointer( GLsizei stride,
			     const GLboolean *pointer )

PARAMETERS    [Toc]    [Back]

     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.

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

DESCRIPTION    [Toc]    [Back]

     glEdgeFlagPointer specifies the location and data format 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.  (Singlearray
 storage may be more efficient on some implementations; see
     glInterleavedArrays.)

     When an edge flag array is	specified, stride and pointer 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    [Toc]    [Back]

     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 undefined.

     glEdgeFlagPointer is typically implemented	on the client side.





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glEdgeFlagPointer(3G)	       OpenGL Reference		 glEdgeFlagPointer(3G)



     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    [Toc]    [Back]

     GL_INVALID_ENUM is	generated if stride is negative.

ASSOCIATED GETS    [Toc]    [Back]

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


MACHINE	DEPENDENCIES
     On	RealityEngine, RealityEngine2, and VTX systems,	do not enable or
     disable GL_VERTEX_ARRAY, GL_VERTEX_ARRAY_EXT, GL_NORMAL_ARRAY,
     GL_NORMAL_ARRAY_EXT, GL_COLOR_ARRAY, GL_COLOR_ARRAY_EXT,
     GL_INDEX_ARRAY,GL_INDEX_ARRAY_EXT,	GL_TEXTURE_COORD_ARRAY,
     GL_TEXTURE_COORD_ARRAY_EXT, GL_EDGE_FLAG_ARRAY or GL_EDGE_FLAG_ARRAY_EXT
     between a call to glNewList and the corresponding call to glEndList.
     Instead, enable or	disable	before the call	to glNewList.

SEE ALSO    [Toc]    [Back]

     glArrayElement, glColorPointer, glDrawArrays, glDrawElements, glEnable,
     glGetPointerv, glIndexPointer, glNormalPointer, glPopClientAttrib,
     glPushClientAttrib, glTexCoordPointer, glVertexPointer


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