1
_C_ License Applicability. Except to the extent portions of this file are
2
_C_ made subject to an alternative license as permitted in the SGI Free
3
_C_ Software License B, Version 1.1 (the "License"), the contents of this
4
_C_ file are subject only to the provisions of the License. You may not use
5
_C_ this file except in compliance with the License. You may obtain a copy
6
_C_ of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
7
_C_ Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
9
_C_ http://oss.sgi.com/projects/FreeB
11
_C_ Note that, as provided in the License, the Software is distributed on an
12
_C_ "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
13
_C_ DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
14
_C_ CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
15
_C_ PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
17
_C_ Original Code. The Original Code is: OpenGL Sample Implementation,
18
_C_ Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
19
_C_ Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
20
_C_ Copyright in any portions created by third parties is as indicated
21
_C_ elsewhere herein. All Rights Reserved.
23
_C_ Additional Notice Provisions: The application programming interfaces
24
_C_ established by SGI in conjunction with the Original Code are The
25
_C_ OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
26
_C_ April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
27
_C_ 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
28
_C_ Window System(R) (Version 1.3), released October 19, 1998. This software
29
_C_ was created using the OpenGL(R) version 1.2.1 Sample Implementation
30
_C_ published by SGI, but has not been independently verified as being
31
_C_ compliant with the OpenGL(R) version 1.2.1 Specification.
34
_C_ The first character in this file must be an '_'!
35
_C_ Anything on a line after _C_ is ignored
36
_define(_filters,eqn)_C_
37
_C_ eqn is automatically replaced with neqn for nroff
38
_header(BeginCurve, delimit a NURBS curve definition)
40
_names(EndCurve,,noheader)
46
Specifies the NURBS object (created with _cmnd(NewNurbsRenderer)).
48
Use _cmnd(BeginCurve) to mark the beginning of a NURBS
51
calling _cmnd(BeginCurve), make one or more calls to
52
_cmnd(NurbsCurve) to define the attributes of the curve.
53
Exactly one of the calls to _cmnd(NurbsCurve) must have
54
a curve type of _const(MAP1_VERTEX_3) or _const(MAP1_VERTEX_4).
55
To mark the end of the NURBS curve definition, call _cmnd(EndCurve).
57
GL evaluators are used to render the NURBS curve as a series of line
59
Evaluator state is preserved during rendering
60
with _glcmnd(PushAttrib)(_const(EVAL_BIT)) and
62
See the _glcmnd(PushAttrib) reference page for details on exactly what state
65
The following commands render a textured NURBS curve with normals;
66
texture coordinates and normals are also specified as NURBS curves:
70
gluNurbsCurve(nobj, ..., GL_MAP1_TEXTURE_COORD_2);
71
gluNurbsCurve(nobj, ..., GL_MAP1_NORMAL);
72
gluNurbsCurve(nobj, ..., GL_MAP1_VERTEX_4);
76
_cmnd(BeginSurface), _cmnd(BeginTrim), _cmnd(NewNurbsRenderer),
78
_glcmnd(PopAttrib), _glcmnd(PushAttrib)