From f4092abdf94af6a99aff944d6264bc1284e8bdd4 Mon Sep 17 00:00:00 2001 From: Reinhard Tartler Date: Mon, 10 Oct 2011 17:43:39 +0200 Subject: Imported nx-X11-3.1.0-1.tar.gz Summary: Imported nx-X11-3.1.0-1.tar.gz Keywords: Imported nx-X11-3.1.0-1.tar.gz into Git repository --- .../main/doc/man/manglu/standard/nurbssurface.gl | 121 +++++++++++++++++++++ 1 file changed, 121 insertions(+) create mode 100644 nx-X11/extras/ogl-sample/main/doc/man/manglu/standard/nurbssurface.gl (limited to 'nx-X11/extras/ogl-sample/main/doc/man/manglu/standard/nurbssurface.gl') diff --git a/nx-X11/extras/ogl-sample/main/doc/man/manglu/standard/nurbssurface.gl b/nx-X11/extras/ogl-sample/main/doc/man/manglu/standard/nurbssurface.gl new file mode 100644 index 000000000..4c18c011b --- /dev/null +++ b/nx-X11/extras/ogl-sample/main/doc/man/manglu/standard/nurbssurface.gl @@ -0,0 +1,121 @@ +_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_ $Date: 2004/03/14 08:29:09 $ $Revision: 1.1.1.4 $ +_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(NurbsSurface, define the shape of a NURBS surface) +_names(NurbsSurface) +.EQ +delim $$ +.EN +.SH PARAMETERS +_phead(_param1) +Specifies the NURBS object (created with _cmnd(NewNurbsRenderer)). +_phead(_param2) +Specifies the number of knots in the parametric \f2u\fP direction. +_phead(_param3) +Specifies an array of _param2 nondecreasing knot values in the parametric +\f2u\fP direction. +_phead(_param4) +Specifies the number of knots in the parametric \f2v\fP direction. +_phead(_param5) +Specifies an array of _param4 nondecreasing knot values in the parametric +\f2v\fP direction. +_phead(_param6) +Specifies the offset (as a number of single-precision floating point values) +between successive control points in the parametric \f2u\fP direction +in _param8. +_phead(_param7) +Specifies the offset (in single-precision floating-point values) +between successive control points in the parametric \f2v\fP direction +in _param8. +_phead(_param8) +Specifies an array containing control points for the NURBS surface. +The offsets between successive control points in the parametric \f2u\fP +and \f2v\fP directions are given by _param6 and _param7. +_phead(_param9) +Specifies the order of the NURBS surface in the parametric \f2u\fP +direction. The order is one more than the degree, hence +a surface that is cubic in \f2u\fP has a \f2u\fP order of 4. +_phead(_param10) +Specifies the order of the NURBS surface in the parametric \f2v\fP +direction. The order is one more than the degree, hence +a surface that is cubic in \f2v\fP has a \f2v\fP order of 4. +_phead(_param11) +Specifies type of the surface. _param11 can be any of the valid +two-dimensional evaluator types (such as _const(MAP2_VERTEX_3) or +_const(MAP2_COLOR_4)). +.SH DESCRIPTION +Use _cmnd within a NURBS (Non-Uniform Rational B-Spline) surface +definition to describe the shape of a NURBS surface (before +any trimming). To mark the beginning of +a NURBS surface definition, use the _cmnd(BeginSurface) command. +To mark the end of a NURBS surface definition, use the +_cmnd(EndSurface) command. Call _cmnd within a NURBS +surface definition only. +.P +Positional, texture, and color coordinates are associated +with a surface by presenting each as a separate _cmnd between a +_cmnd(BeginSurface)/_cmnd(EndSurface) pair. No more than +one call to _cmnd for each of color, position, and texture +data can be made within a single _cmnd(BeginSurface)/_cmnd(EndSurface) +pair. Exactly one call must be made to describe the position of the +surface (a _param11 of _const(MAP2_VERTEX_3) or _const(MAP2_VERTEX_4)). +.P +A NURBS surface can be trimmed by using the commands +_cmnd(NurbsCurve) and _cmnd(PwlCurve) between calls to +_cmnd(BeginTrim) and _cmnd(EndTrim). +.P +Note that a _cmnd with _param2 knots in the \f2u\fP direction +and _param4 knots in the \f2v\fP direction with orders +_param9 and _param10 must have +(_param2 - _param9) $times$ (_param4 - _param10) control points. +.SH EXAMPLE +The following commands render a textured NURBS surface with normals; +the texture coordinates and normals are also NURBS surfaces: +.sp +.Ex +gluBeginSurface(nobj); + gluNurbsSurface(nobj, ..., GL_MAP2_TEXTURE_COORD_2); + gluNurbsSurface(nobj, ..., GL_MAP2_NORMAL); + gluNurbsSurface(nobj, ..., GL_MAP2_VERTEX_4); +gluEndSurface(nobj); +.Ee +.sp +.SH SEE ALSO +_cmnd(BeginSurface), _cmnd(BeginTrim), _cmnd(NewNurbsRenderer), +_cmnd(NurbsCurve), +_cmnd(PwlCurve) + -- cgit v1.2.3