| /* |
| ** License Applicability. Except to the extent portions of this file are |
| ** made subject to an alternative license as permitted in the SGI Free |
| ** Software License B, Version 1.1 (the "License"), the contents of this |
| ** file are subject only to the provisions of the License. You may not use |
| ** this file except in compliance with the License. You may obtain a copy |
| ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600 |
| ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at: |
| ** |
| ** http://oss.sgi.com/projects/FreeB |
| ** |
| ** Note that, as provided in the License, the Software is distributed on an |
| ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS |
| ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND |
| ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A |
| ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT. |
| ** |
| ** Original Code. The Original Code is: OpenGL Sample Implementation, |
| ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics, |
| ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc. |
| ** Copyright in any portions created by third parties is as indicated |
| ** elsewhere herein. All Rights Reserved. |
| ** |
| ** Additional Notice Provisions: The application programming interfaces |
| ** established by SGI in conjunction with the Original Code are The |
| ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released |
| ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version |
| ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X |
| ** Window System(R) (Version 1.3), released October 19, 1998. This software |
| ** was created using the OpenGL(R) version 1.2.1 Sample Implementation |
| ** published by SGI, but has not been independently verified as being |
| ** compliant with the OpenGL(R) version 1.2.1 Specification. |
| */ |
| |
| /* |
| * curvelist.c++ |
| * |
| * $Date: 2012/03/29 17:22:17 $ $Revision: 1.1.1.1 $ |
| * $Header: /cvs/bao-parsec/pkgs/libs/mesa/src/src/glu/sgi/libnurbs/internals/curvelist.cc,v 1.1.1.1 2012/03/29 17:22:17 uid42307 Exp $ |
| */ |
| |
| #include "glimports.h" |
| #include "myassert.h" |
| #include "mystdio.h" |
| #include "quilt.h" |
| #include "curvelist.h" |
| #include "curve.h" |
| #include "nurbsconsts.h" |
| #include "types.h" |
| |
| Curvelist::Curvelist( Quilt *quilts, REAL pta, REAL ptb ) |
| { |
| curve = 0; |
| for( Quilt *q = quilts; q; q = q->next ) |
| curve = new Curve( q, pta, ptb, curve ); |
| range[0] = pta; |
| range[1] = ptb; |
| range[2] = ptb - pta; |
| } |
| |
| Curvelist::Curvelist( Curvelist &upper, REAL value ) |
| { |
| Curvelist &lower = *this; |
| curve = 0; |
| for( Curve *c = upper.curve; c; c = c->next ) |
| curve = new Curve( *c, value, curve ); |
| |
| lower.range[0] = upper.range[0]; |
| lower.range[1] = value; |
| lower.range[2] = value - upper.range[0]; |
| upper.range[0] = value; |
| upper.range[2] = upper.range[1] - value; |
| } |
| |
| Curvelist::~Curvelist() |
| { |
| while( curve ) { |
| Curve *c = curve; |
| curve = curve->next; |
| delete c; |
| } |
| } |
| |
| int |
| Curvelist::cullCheck( void ) |
| { |
| for( Curve *c = curve; c; c = c->next ) |
| if( c->cullCheck() == CULL_TRIVIAL_REJECT ) |
| return CULL_TRIVIAL_REJECT; |
| return CULL_ACCEPT; |
| } |
| |
| void |
| Curvelist::getstepsize( void ) |
| { |
| stepsize = range[2]; |
| Curve *c; |
| for( c = curve; c; c = c->next ) { |
| c->getstepsize(); |
| c->clamp(); |
| stepsize = ((c->stepsize < stepsize) ? c->stepsize : stepsize); |
| if( c->needsSamplingSubdivision() ) break; |
| } |
| needsSubdivision = ( c ) ? 1 : 0; |
| } |
| |
| int |
| Curvelist::needsSamplingSubdivision( void ) |
| { |
| return needsSubdivision; |
| } |
| |