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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
-_define(_filters,eqn)_C_
-_C_ eqn is automatically replaced with neqn for nroff
-_header(GetTexGen,return texture coordinate generation parameters)
-_names(GetTexGen,[dfi]v)
-.EQ
-delim $$
-.EN
-.SH PARAMETERS
-_phead(_param1)
-Specifies a texture coordinate.
-Must be
-_const(S),
-_const(T),
-_const(R), or
-_const(Q).
-_phead(_param2)
-Specifies the symbolic name of the value(s) to be returned.
-Must be either _const(TEXTURE_GEN_MODE)
-or the name of one of the texture generation plane equations:
-_const(OBJECT_PLANE) or _const(EYE_PLANE).
-_phead(_param3)
-Returns the requested data.
-.SH DESCRIPTION
-_cmnd returns in _param3 selected parameters of a texture coordinate
-generation function that was specified using _cmnd(TexGen).
-_param1 names one of the (\f2s\fP, \f2t\fP, \f2r\fP, \f2q\fP)
-texture coordinates,
-using the symbolic constant
-_const(S),
-_const(T),
-_const(R), or
-_const(Q).
-.P
-_param2 specifies one of three symbolic names:
-.TP 28
-_const(TEXTURE_GEN_MODE)
-_param3 returns the single-valued texture generation function,
-a symbolic constant. The initial value is _const(EYE_LINEAR).
-.TP
-_const(OBJECT_PLANE)
-_param3 returns the four plane equation coefficients that specify
-object linear-coordinate generation.
-Integer values, when requested,
-are mapped directly from the internal floating-point representation.
-.BP
-.TP
-_const(EYE_PLANE)
-_param3 returns the four plane equation coefficients that specify
-eye linear-coordinate generation.
-Integer values,
-when requested,
-are mapped directly from the internal floating-point representation.
-The returned values are those maintained in eye coordinates.
-They are not equal to the values specified using _cmnd(TexGen),
-unless the modelview matrix was identity when _cmnd(TexGen) was called.
-.SH NOTES
-If an error is generated,
-no change is made to the contents of _param3.
-.P
-When the _arbstring(multitexture) extension is supported, _cmnd returns
-the texture coordinate generation parameters for the active texture unit.
-.SH ERRORS
-_const(INVALID_ENUM) is generated if _param1 or _param2 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 SEE ALSO
-_cmnd(ActiveTextureARB),
-_cmnd(TexGen)