GLEDGEFLAGPOINTER()MachTen Programmer’s ManualGLEDGEFLAGPOINTER()

NAME
glEdgeFlagPointer - define an array of edge flags

C SPECIFICATION
void glEdgeFlagPointer( GLsizei stride,
const GLvoid *pointer )

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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.

pointer Specifies a pointer to the first edge flag in the
array.

DESCRIPTION
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 vertexes and attributes to be packed into a
single 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, stride and pointer
are saved as client-side state.

To enable and disable the edge flag array, call glEnable-
ClientState 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
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, glColorPointer, glDrawArrays, glDrawEle-
ments, glEnable, glGetPointerv, glIndexPointer, glNormal-
Pointer, glPopClientAttrib,
glPushClientAttrib, glTexCoordPointer, glVertexPointer

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