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glEdgeFlagPointer - define an array of edge flags
void
glEdgeFlagPointer( GLsizei stride,
const GLvoid *ptr )
eqn not supported
- 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.
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. (Single-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.
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.
GL_INVALID_ENUM is generated if stride
is negative.
glIsEnabled with argument GL_EDGE_FLAG_ARRAY
glGet with argument GL_EDGE_FLAG_ARRAY_STRIDE
glGetPointerv with argument GL_EDGE_FLAG_ARRAY_POINTER
glArrayElement(3G)
,
glColorPointer(3G)
, glDrawArrays(3G)
, glDrawElements(3G)
, glEnable(3G)
,
glGetPointerv(3G)
, glIndexPointer(3G)
, glNormalPointer(3G)
, glPopClientAttrib(3G)
,
glPushClientAttrib(3G)
, glTexCoordPointer(3G)
, glVertexPointer(3G)
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