| /* |
| ** 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. |
| */ |
| |
| /* |
| * patchlist.c++ |
| * |
| * $Date: 2012/03/29 17:22:18 $ $Revision: 1.1.1.1 $ |
| * $Header: /cvs/bao-parsec/pkgs/libs/mesa/src/src/glu/sgi/libnurbs/internals/patchlist.cc,v 1.1.1.1 2012/03/29 17:22:18 uid42307 Exp $ |
| */ |
| |
| #include <stdio.h> |
| #include "glimports.h" |
| #include "myassert.h" |
| #include "mystdio.h" |
| #include "quilt.h" |
| #include "patchlist.h" |
| #include "patch.h" |
| #include "nurbsconsts.h" |
| |
| Patchlist::Patchlist( Quilt *quilts, REAL *pta, REAL *ptb ) |
| { |
| patch = 0; |
| for( Quilt *q = quilts; q; q = q->next ) |
| patch = new Patch( q, pta, ptb, patch ); |
| pspec[0].range[0] = pta[0]; |
| pspec[0].range[1] = ptb[0]; |
| pspec[0].range[2] = ptb[0] - pta[0]; |
| |
| pspec[1].range[0] = pta[1]; |
| pspec[1].range[1] = ptb[1]; |
| pspec[1].range[2] = ptb[1] - pta[1]; |
| } |
| |
| Patchlist::Patchlist( Patchlist &upper, int param, REAL value) |
| { |
| Patchlist &lower = *this; |
| patch = 0; |
| for( Patch *p = upper.patch; p; p = p->next ) |
| patch = new Patch( *p, param, value, patch ); |
| |
| if( param == 0 ) { |
| lower.pspec[0].range[0] = upper.pspec[0].range[0]; |
| lower.pspec[0].range[1] = value; |
| lower.pspec[0].range[2] = value - upper.pspec[0].range[0]; |
| upper.pspec[0].range[0] = value; |
| upper.pspec[0].range[2] = upper.pspec[0].range[1] - value; |
| lower.pspec[1] = upper.pspec[1]; |
| } else { |
| lower.pspec[0] = upper.pspec[0]; |
| lower.pspec[1].range[0] = upper.pspec[1].range[0]; |
| lower.pspec[1].range[1] = value; |
| lower.pspec[1].range[2] = value - upper.pspec[1].range[0]; |
| upper.pspec[1].range[0] = value; |
| upper.pspec[1].range[2] = upper.pspec[1].range[1] - value; |
| } |
| } |
| |
| Patchlist::~Patchlist() |
| { |
| while( patch ) { |
| Patch *p = patch; |
| patch = patch->next; |
| delete p; |
| } |
| } |
| |
| int |
| Patchlist::cullCheck( void ) |
| { |
| for( Patch *p = patch; p; p = p->next ) |
| if( p->cullCheck() == CULL_TRIVIAL_REJECT ) |
| return CULL_TRIVIAL_REJECT; |
| return CULL_ACCEPT; |
| } |
| |
| void |
| Patchlist::getRanges(REAL ranges[4]) |
| { |
| ranges[0] = pspec[0].range[0]; |
| ranges[1] = pspec[0].range[1]; |
| ranges[2] = pspec[1].range[0]; |
| ranges[3] = pspec[1].range[1]; |
| } |
| |
| void |
| Patchlist::getstepsize( void ) |
| { |
| pspec[0].stepsize = pspec[0].range[2]; |
| pspec[0].sidestep[0] = pspec[0].range[2]; |
| pspec[0].sidestep[1] = pspec[0].range[2]; |
| |
| pspec[1].stepsize = pspec[1].range[2]; |
| pspec[1].sidestep[0] = pspec[1].range[2]; |
| pspec[1].sidestep[1] = pspec[1].range[2]; |
| |
| for( Patch *p = patch; p; p = p->next ) { |
| p->getstepsize(); |
| p->clamp(); |
| pspec[0].stepsize = ((p->pspec[0].stepsize < pspec[0].stepsize) ? p->pspec[0].stepsize : pspec[0].stepsize); |
| pspec[0].sidestep[0] = ((p->pspec[0].sidestep[0] < pspec[0].sidestep[0]) ? p->pspec[0].sidestep[0] : pspec[0].sidestep[0]); |
| pspec[0].sidestep[1] = ((p->pspec[0].sidestep[1] < pspec[0].sidestep[1]) ? p->pspec[0].sidestep[1] : pspec[0].sidestep[1]); |
| pspec[1].stepsize = ((p->pspec[1].stepsize < pspec[1].stepsize) ? p->pspec[1].stepsize : pspec[1].stepsize); |
| pspec[1].sidestep[0] = ((p->pspec[1].sidestep[0] < pspec[1].sidestep[0]) ? p->pspec[1].sidestep[0] : pspec[1].sidestep[0]); |
| pspec[1].sidestep[1] = ((p->pspec[1].sidestep[1] < pspec[1].sidestep[1]) ? p->pspec[1].sidestep[1] : pspec[1].sidestep[1]); |
| } |
| } |
| |
| void |
| Patchlist::bbox( void ) |
| { |
| for( Patch *p = patch; p; p = p->next ) |
| p->bbox(); |
| } |
| |
| int |
| Patchlist::needsNonSamplingSubdivision( void ) |
| { |
| notInBbox = 0; |
| for( Patch *p = patch; p; p = p->next ) |
| notInBbox |= p->needsNonSamplingSubdivision(); |
| return notInBbox; |
| } |
| |
| int |
| Patchlist::needsSamplingSubdivision( void ) |
| { |
| pspec[0].needsSubdivision = 0; |
| pspec[1].needsSubdivision = 0; |
| |
| for( Patch *p = patch; p; p = p->next ) { |
| pspec[0].needsSubdivision |= p->pspec[0].needsSubdivision; |
| pspec[1].needsSubdivision |= p->pspec[0].needsSubdivision; |
| } |
| return (pspec[0].needsSubdivision || pspec[1].needsSubdivision) ? 1 : 0; |
| } |
| |
| int |
| Patchlist::needsSubdivision( int param ) |
| { |
| return pspec[param].needsSubdivision; |
| } |