- define an array of edge flags
C SPECIFICATION
PARAMETERS
_param1 Specifies the byte offset between consecutive
edge flags. If _param1 is 0 (the initial value),
the edge flags are understood to be tightly
packed in the array. The initial value is 0.
_param2 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. _param1
specifies the byte stride from one edge flag to the next
allowing vertexes and attributes to be packed into a sin-
gle array or stored in separate arrays. (Single-array
storage may be more efficient on some implementations; see
glInterleavedArrays.)
When an edge flag array is specified, _param1 and _param2
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 primi-
tives by indexing vertexes and vertex attributes and
glDrawElements to construct a sequence of primitives by
indexing vertexes 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 undefined.
glEdgeFlagPointer is typically implemented on the client
SEE ALSO
glArrayElement, glColorPointer, glDrawArrays,
glDrawElements, glEnable, glGetPointerv, glIndexPointer,
glNormalPointer, glPopClientAttrib,
glPushClientAttrib, glTexCoordPointer, glVertexPointer
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