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/nurbscurve.gl | 104 +++++++++++++++++++++ 1 file changed, 104 insertions(+) create mode 100644 nx-X11/extras/ogl-sample/main/doc/man/manglu/standard/nurbscurve.gl (limited to 'nx-X11/extras/ogl-sample/main/doc/man/manglu/standard/nurbscurve.gl') diff --git a/nx-X11/extras/ogl-sample/main/doc/man/manglu/standard/nurbscurve.gl b/nx-X11/extras/ogl-sample/main/doc/man/manglu/standard/nurbscurve.gl new file mode 100644 index 000000000..45dbb4235 --- /dev/null +++ b/nx-X11/extras/ogl-sample/main/doc/man/manglu/standard/nurbscurve.gl @@ -0,0 +1,104 @@ +_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(NurbsCurve, define the shape of a NURBS curve) +_names(NurbsCurve) +.EQ +delim $$ +.EN +.SH PARAMETERS +_phead(_param1) +Specifies the NURBS object (created with _cmnd(NewNurbsRenderer)). +_phead(_param2) +Specifies the number of knots in _param3. +_param2 equals the number of control points plus the order. +_phead(_param3) +Specifies an array of _param2 nondecreasing knot values. +_phead(_param4) +Specifies the offset (as a number of single-precision floating-point values) +between successive curve control points. +_phead(_param5) +Specifies a pointer to an array of control points. The coordinates must +agree with _param7, specified below. +_phead(_param6) +Specifies the order of the NURBS curve. _param6 equals degree + 1, hence +a cubic curve has an order of 4. +_phead(_param7) +Specifies the type of the curve. If this curve is defined within a +_cmnd(BeginCurve)/_cmnd(EndCurve) pair, then +the type can be any of the valid +one-dimensional evaluator types (such as _const(MAP1_VERTEX_3) or +_const(MAP1_COLOR_4)). Between a _cmnd(BeginTrim)/_cmnd(EndTrim) pair, +the only valid types are _gluconst(MAP1_TRIM_2) and _gluconst(MAP1_TRIM_3). +.SH DESCRIPTION +Use _cmnd to describe a NURBS curve. +.P +When _cmnd appears between a _cmnd(BeginCurve)/_cmnd(EndCurve) pair, it is +used to describe a curve to be rendered. +Positional, texture, and color coordinates are associated +by presenting each as a separate _cmnd between a +_cmnd(BeginCurve)/_cmnd(EndCurve) pair. No more than +one call to _cmnd for each of color, position, and texture +data can be made within a single _cmnd(BeginCurve)/_cmnd(EndCurve) +pair. Exactly one call must be made to describe the position of the +curve (a _param7 of _const(MAP1_VERTEX_3) or _const(MAP1_VERTEX_4)). +.P +When _cmnd appears between a _cmnd(BeginTrim)/_cmnd(EndTrim) pair, it is +used to describe a trimming curve on a NURBS surface. If _param7 is +_gluconst(MAP1_TRIM_2), then it describes a curve in two-dimensional (\f2u\fP +and \f2v\fP) +parameter space. If it is _gluconst(MAP1_TRIM_3), then it describes a +curve in two-dimensional homogeneous (\f2u\fP, \f2v\fP, and \f2w\fP) +parameter space. +See the _cmnd(BeginTrim) reference page for more discussion about trimming +curves. +.SH EXAMPLE +The following commands render a textured NURBS curve with normals: +.sp +.Ex +gluBeginCurve(nobj); + gluNurbsCurve(nobj, ..., GL_MAP1_TEXTURE_COORD_2); + gluNurbsCurve(nobj, ..., GL_MAP1_NORMAL); + gluNurbsCurve(nobj, ..., GL_MAP1_VERTEX_4); +gluEndCurve(nobj); +.Ee +.sp +.SH NOTES +To define trim curves which stitch well, use _cmnd(PwlCurve). +.SH SEE ALSO +_cmnd(BeginCurve), _cmnd(BeginTrim), _cmnd(NewNurbsRenderer), _cmnd(PwlCurve) + -- cgit v1.2.3