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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,tbl|eqn)_C_
-_C_ eqn is automatically replaced with neqn for nroff
-_header(GetMap,return evaluator parameters)
-_names(GetMap,[dfi]v)
-.EQ
-delim $$
-.EN
-.SH PARAMETERS
-_phead(_param1)
-Specifies the symbolic name of a map.
-Accepted values are
-_const(MAP1_COLOR_4),
-_const(MAP1_INDEX),
-_const(MAP1_NORMAL),
-_const(MAP1_TEXTURE_COORD_1),
-_const(MAP1_TEXTURE_COORD_2),
-_const(MAP1_TEXTURE_COORD_3),
-_const(MAP1_TEXTURE_COORD_4),
-_const(MAP1_VERTEX_3),
-_const(MAP1_VERTEX_4),
-_const(MAP2_COLOR_4),
-_const(MAP2_INDEX),
-_const(MAP2_NORMAL),
-_const(MAP2_TEXTURE_COORD_1),
-_const(MAP2_TEXTURE_COORD_2),
-_const(MAP2_TEXTURE_COORD_3),
-_const(MAP2_TEXTURE_COORD_4),
-_const(MAP2_VERTEX_3), and
-_const(MAP2_VERTEX_4).
-_phead(_param2)
-Specifies which parameter to return.
-Symbolic names
-_const(COEFF),
-_const(ORDER), and
-_const(DOMAIN) are accepted.
-_phead(_param3)
-Returns the requested data.
-.SH DESCRIPTION
-_cmnd(Map1) and _cmnd(Map2) define evaluators.
-_cmnd returns evaluator parameters.
-_param1 chooses a map,
-_param2 selects a specific parameter,
-and _param3 points to storage where the values will be returned.
-.P
-The acceptable values for the _param1 parameter are described
-in the _cmnd(Map1) and _cmnd(Map2) reference pages.
-.P
-_param2 can assume the following values:
-.TP 15
-_const(COEFF)
-_param3 returns the control points for the evaluator function.
-One-dimensional evaluators return $order$ control points,
-and two-dimensional evaluators return $uorder ~times~ vorder$ control points.
-Each control point consists of one, two, three, or four integer,
-single-precision floating-point,
-or double-precision floating-point values,
-depending on the type of the evaluator.
-The GL returns two-dimensional control points in row-major order,
-incrementing the $uorder$ index quickly
-and the $vorder$ index after each row.
-Integer values,
-when requested,
-are computed by rounding the internal floating-point values to the
-nearest integer values.
-.TP
-_const(ORDER)
-_param3 returns the order of the evaluator function.
-One-dimensional evaluators return a single value,
-$order$. The initial value is 1.
-Two-dimensional evaluators return two values,
-$uorder$ and $vorder$. The initial value is 1,1.
-.TP
-_const(DOMAIN)
-_param3 returns the linear $u$ and $v$ mapping parameters.
-One-dimensional evaluators return two values,
-$u1$ and $u2$,
-as specified by _cmnd(Map1).
-Two-dimensional evaluators return four values
-($u1$, $u2$, $v1$, and $v2$)
-as specified by _cmnd(Map2).
-Integer values,
-when requested,
-are computed by rounding the internal floating-point values to the
-nearest integer values.
-.SH NOTES
-If an error is generated,
-no change is made to the contents of _param3.
-.SH ERRORS
-_const(INVALID_ENUM) is generated if either _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(EvalCoord),
-_cmnd(Map1),
-_cmnd(Map2)