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_C_ License Applicability. Except to the extent portions of this file are
_C_ made subject to an alternative license as permitted in the SGI Free
_C_ Software License B, Version 1.1 (the "License"), the contents of this
_C_ file are subject only to the provisions of the License. You may not use
_C_ this file except in compliance with the License. You may obtain a copy
_C_ of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
_C_ Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
_C_
_C_ http://oss.sgi.com/projects/FreeB
_C_
_C_ Note that, as provided in the License, the Software is distributed on an
_C_ "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
_C_ DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
_C_ CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
_C_ PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
_C_
_C_ Original Code. The Original Code is: OpenGL Sample Implementation,
_C_ Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
_C_ Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
_C_ Copyright in any portions created by third parties is as indicated
_C_ elsewhere herein. All Rights Reserved.
_C_
_C_ Additional Notice Provisions: The application programming interfaces
_C_ established by SGI in conjunction with the Original Code are The
_C_ OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
_C_ April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
_C_ 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
_C_ Window System(R) (Version 1.3), released October 19, 1998. This software
_C_ was created using the OpenGL(R) version 1.2.1 Sample Implementation
_C_ published by SGI, but has not been independently verified as being
_C_ compliant with the OpenGL(R) version 1.2.1 Specification.
_C_
_C_ The first character in this file must be an '_'!
_C_ Anything on a line after _C_ is ignored
_C_ A real line follows.
_define(_filters,tbl|eqn)_C_
_C_ eqn is automatically replaced with neqn for nroff
_C_ Use GL not OpenGL
_C_ Don't change the ordering of the main headers.
_C_ C specification (or fortran) is handled automatically
_C_ .TH is automatically added to the top of this file.
_C_ Below, use current tense, active do not capitalize the first word and dont
_C_ use a period.
_C_ the function name must appear in (APIFILE) (usually gl.h) as set in
_C_ Makefile.
_header(NormalPointer,define an array of normals)
_names(NormalPointer)
.EQ
delim $$
.EN
.SH PARAMETERS
_phead(_param1)
Specifies the data type of each coordinate in the array.
Symbolic constants
_const(BYTE),
_const(SHORT),
_const(INT),
_const(FLOAT), and
_const(DOUBLE)
are accepted. The initial value is _const(FLOAT).
_phead(_param2)
Specifies the byte offset between consecutive normals. If _param2 is 0\-
the initial value\-the normals are understood to be tightly packed in
the array.
The initial value is 0.
_phead(_param3)
Specifies a pointer to the first coordinate of the first normal in the
array.
The initial value is 0.
.SH DESCRIPTION
_cmnd specifies the location and data format of an array of normals
to use when rendering.
_param1 specifies the data type of
the normal coordinates and _param2 gives the byte stride from one
normal 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 _cmnd(InterleavedArrays).)
When a normal array is specified, _param1, _param2, and _param3 are
saved as client-side state.
.P
To enable and disable the normal array, call _cmnd(EnableClientState) and
_cmnd(DisableClientState) with the argument _const(NORMAL_ARRAY). If
enabled, the normal array is used
when _cmnd(DrawArrays), _cmnd(DrawElements), or _cmnd(ArrayElement) is called.
.P
Use _cmnd(DrawArrays) to construct a sequence of primitives (all of the
same type) from prespecified vertex and vertex attribute arrays.
Use _cmnd(ArrayElement) to specify primitives
by indexing vertices and vertex attributes and _cmnd(DrawElements) to
construct a sequence of primitives by indexing vertices and vertex attributes.
.SH NOTES
_cmnd is available only if the GL version is 1.1 or greater.
.P
The normal array is initially disabled and isn't accessed when
_cmnd(ArrayElement), _cmnd(DrawElements), or _cmnd(DrawArrays) is called.
.P
Execution of _cmnd is not allowed between
_cmnd(Begin) and the corresponding _cmnd(End),
but an error may or may not be generated. If an error is not generated,
the operation is undefined.
.P
_cmnd is typically implemented on the client side.
.P
Since the normal array parameters are client-side state, they are not
saved or restored by _cmnd(PushAttrib) and _cmnd(PopAttrib).
Use _cmnd(PushClientAttrib) and
_cmnd(PopClientAttrib) instead.
.SH ERRORS
_const(INVALID_ENUM) is generated if _param1 is not an accepted value.
.P
_const(INVALID_VALUE) is generated if _param2 is negative.
.SH ASSOCIATED GETS
_cmnd(IsEnabled) with argument _const(NORMAL_ARRAY)
.br
_cmnd(Get) with argument _const(NORMAL_ARRAY_TYPE)
.br
_cmnd(Get) with argument _const(NORMAL_ARRAY_STRIDE)
.br
_cmnd(GetPointerv) with argument _const(NORMAL_ARRAY_POINTER)
.SH SEE ALSO
_C_ no queries or gets listed above,
_C_ alphabetize commands
_C_ seperate with commas not .br.
_C_ no command appears in the associated gets as well as in SEE ALSO.
_cmnd(ArrayElement),
_cmnd(ColorPointer),
_cmnd(DrawArrays),
_cmnd(DrawElements),
_cmnd(EdgeFlagPointer),
_cmnd(Enable),
_cmnd(GetPointerv),
_cmnd(IndexPointer),
_cmnd(InterleavedArrays),
_cmnd(PopClientAttrib),
_cmnd(PushClientAttrib),
_cmnd(TexCoordPointer),
_cmnd(VertexPointer)
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