| /* |
| ** 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. |
| */ |
| |
| /* |
| * trimregion.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/trimregion.cc,v 1.1.1.1 2012/03/29 17:22:17 uid42307 Exp $ |
| */ |
| |
| #include "glimports.h" |
| #include "myassert.h" |
| #include "mystdio.h" |
| #include "trimregion.h" |
| #include "backend.h" |
| |
| TrimRegion::TrimRegion( void ) |
| { |
| } |
| |
| void |
| TrimRegion::setDu( REAL du ) |
| { |
| oneOverDu = 1.0/du; |
| } |
| |
| void |
| TrimRegion::init( long npts, Arc_ptr extrema ) |
| { |
| left.init( npts, extrema, extrema->pwlArc->npts - 1 ); |
| left.getNextPt(); |
| |
| right.init( npts, extrema, 0 ); |
| right.getPrevPt(); |
| } |
| |
| void |
| TrimRegion::getPts( Arc_ptr extrema ) |
| { |
| left.getNextPts( extrema ); |
| right.getPrevPts( extrema ); |
| } |
| |
| void |
| TrimRegion::getPts( Backend &backend ) |
| { |
| left.getNextPts( bot.vval, backend ); |
| right.getPrevPts( bot.vval, backend ); |
| } |
| |
| void |
| TrimRegion::getGridExtent( void ) |
| { |
| getGridExtent( left.last(), right.last() ); |
| } |
| |
| void |
| TrimRegion::getGridExtent( TrimVertex *l, TrimVertex *r ) |
| { |
| bot.ustart = (long) ((l->param[0] - uarray.uarray[0])*oneOverDu); |
| if( l->param[0] >= uarray.uarray[bot.ustart] ) bot.ustart++; |
| // if( l->param[0] > uarray.uarray[bot.ustart] ) bot.ustart++; |
| assert( l->param[0] <= uarray.uarray[bot.ustart] ); |
| assert( l->param[0] >= uarray.uarray[bot.ustart-1] ); |
| |
| bot.uend = (long) ((r->param[0] - uarray.uarray[0])*oneOverDu); |
| if( uarray.uarray[bot.uend] >= r->param[0] ) bot.uend--; |
| // if( uarray.uarray[bot.uend] > r->param[0] ) bot.uend--; |
| assert( r->param[0] >= uarray.uarray[bot.uend] ); |
| assert( r->param[0] <= uarray.uarray[bot.uend+1] ); |
| } |
| |
| int |
| TrimRegion::canTile( void ) |
| { |
| TrimVertex *lf = left.first(); |
| TrimVertex *ll = left.last(); |
| TrimVertex *l = ( ll->param[0] > lf->param[0] ) ? ll : lf; |
| |
| TrimVertex *rf = right.first(); |
| TrimVertex *rl = right.last(); |
| TrimVertex *r = ( rl->param[0] < rf->param[0] ) ? rl : rf; |
| return (l->param[0] <= r->param[0]) ? 1 : 0; |
| } |
| |