_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
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_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
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_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
_define(_filters,eqn)_C_
_C_      eqn is automatically replaced with neqn for nroff
_header(MatrixMode,specify which matrix is the current matrix)
_names(MatrixMode)
.SH PARAMETERS
_phead(_param1)
Specifies which matrix stack is the target
for subsequent matrix operations.
Three values are accepted:
_const(MODELVIEW),
_const(PROJECTION), and
_const(TEXTURE).
The initial value is _const(MODELVIEW).
.TE

Additionally, if the _arbstring(imaging) extension is supported,
_const(COLOR) is also accepted.
.SH DESCRIPTION
_cmnd sets the current matrix mode.
_param1 can assume one of four values:
.TP 25
_const(MODELVIEW)
Applies subsequent matrix operations to the modelview matrix stack.
.TP
_const(PROJECTION)
Applies subsequent matrix operations to the projection matrix stack.
.TP
_const(TEXTURE)
Applies subsequent matrix operations to the texture matrix stack.
.TP
_const(COLOR)
Applies subsequent matrix operations to the color matrix stack.
.P
To find out which matrix stack is currently the target of all matrix
operations, call _cmnd(Get) with argument _const(MATRIX_MODE). The initial
value is _const(MODELVIEW).
.SH ERRORS
_const(INVALID_ENUM) is generated if _param1 is not an accepted value.
.P
_const(INVALID_OPERATION) is generated if _cmnd
is executed between the execution of _cmnd(Begin)
and the corresponding execution of _cmnd(End).
.SH ASSOCIATED GETS
_cmnd(Get) with argument _const(MATRIX_MODE)
.SH SEE ALSO
_cmnd(LoadMatrix),
_cmnd(PushMatrix)