fglEdgeFlagPointer(3G) OpenGL Reference fglEdgeFlagPointer(3G)NAMEfglEdgeFlagPointer - define an array of edge flags
FORTRAN SPECIFICATION
SUBROUTINE fglEdgeFlagPointer( INTEGER*4 stride,
CHARACTER*8 pointer )
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. The initial value is 0.
pointer Specifies a pointer to the first edge flag in the array. The
initial value is zero.
DESCRIPTIONfglEdgeFlagPointer 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. (Single-
array storage may be more efficient on some implementations; see
fglInterleavedArrays.)
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 fglEnableClientState and
fglDisableClientState with the argument GL_EDGE_FLAG_ARRAY. If enabled,
the edge flag array is used when fglDrawArrays, fglDrawElements, or
fglArrayElement is called.
Use fglDrawArrays to construct a sequence of primitives (all of the same
type) from prespecified vertex and vertex attribute arrays. Use
fglArrayElement to specify primitives by indexing vertices and vertex
attributes and fglDrawElements to construct a sequence of primitives by
indexing vertices and vertex attributes.
NOTESfglEdgeFlagPointer 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
fglArrayElement, fglDrawElements or fglDrawArrays is called.
Execution of fglEdgeFlagPointer is not allowed between the execution of
fglBegin and the corresponding execution of fglEnd, but an error may or
may not be generated. If no error is generated, the operation is
undefined.
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fglEdgeFlagPointer(3G) OpenGL Reference fglEdgeFlagPointer(3G)fglEdgeFlagPointer is typically implemented on the client side.
Edge flag array parameters are client-side state and are therefore not
saved or restored by fglPushAttrib and fglPopAttrib. Use
fglPushClientAttrib and fglPopClientAttrib instead.
ERRORS
GL_INVALID_ENUM is generated if stride is negative.
ASSOCIATED GETS
fglIsEnabled with argument GL_EDGE_FLAG_ARRAY
fglGet with argument GL_EDGE_FLAG_ARRAY_STRIDE
fglGetPointerv 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 fglNewList and the corresponding call to fglEndList.
Instead, enable or disable before the call to fglNewList.
SEE ALSO
fglArrayElement, fglColorPointer, fglDrawArrays, fglDrawElements,
fglEnable, fglGetPointerv, fglIndexPointer, fglNormalPointer,
fglPopClientAttrib, fglPushClientAttrib, fglTexCoordPointer,
fglVertexPointer
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