mirror of
https://github.com/reactos/reactos.git
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278 lines
8.4 KiB
C++
278 lines
8.4 KiB
C++
/*
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** License Applicability. Except to the extent portions of this file are
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** made subject to an alternative license as permitted in the SGI Free
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** Software License B, Version 1.1 (the "License"), the contents of this
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** file are subject only to the provisions of the License. You may not use
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** this file except in compliance with the License. You may obtain a copy
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** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
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** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
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**
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** http://oss.sgi.com/projects/FreeB
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**
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** Note that, as provided in the License, the Software is distributed on an
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** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
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** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
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** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
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** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
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**
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** Original Code. The Original Code is: OpenGL Sample Implementation,
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** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
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** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
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** Copyright in any portions created by third parties is as indicated
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** elsewhere herein. All Rights Reserved.
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**
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** Additional Notice Provisions: The application programming interfaces
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** established by SGI in conjunction with the Original Code are The
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** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
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** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
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** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
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** Window System(R) (Version 1.3), released October 19, 1998. This software
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** was created using the OpenGL(R) version 1.2.1 Sample Implementation
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** published by SGI, but has not been independently verified as being
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** compliant with the OpenGL(R) version 1.2.1 Specification.
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*/
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/*
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* quilt.c++
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*
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* $Date$ $Revision: 1.1 $
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* $Header: /cygdrive/c/RCVS/CVS/ReactOS/reactos/lib/glu32/libnurbs/internals/quilt.cc,v 1.1 2004/02/02 16:39:12 navaraf Exp $
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*/
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#include "glimports.h"
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#include "mystdio.h"
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#include "myassert.h"
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#include "quilt.h"
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#include "backend.h"
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#include "mapdesc.h"
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#include "flist.h"
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#include "knotvector.h"
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#include "patchlist.h"
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#include "math.h" //fglu_abs()
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#include "simplemath.h" //min()
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/* local preprocessor definitions */
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#define DEF_PATCH_STEPSIZE .4
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#define fsizeof(x) (sizeof(x)/sizeof(REAL))
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Quilt::Quilt( Mapdesc *_mapdesc )
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{
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mapdesc = _mapdesc;
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}
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void
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Quilt::deleteMe( Pool& p )
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{
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for( Quiltspec *q=qspec; q != eqspec; q++ ) {
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#if 1
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if( q->breakpoints) delete[] q->breakpoints; q->breakpoints = 0;
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#else
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if( q->breakpoints) {
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delete[] q->breakpoints;
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q->breakpoints = 0;
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printf("in here\n");
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}
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#endif
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}
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if( cpts ) delete[] cpts;
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cpts = 0;
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PooledObj::deleteMe( p );
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}
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void
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Quilt::show( void )
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{
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#ifndef NDEBUG
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int nc = mapdesc->getNcoords();
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REAL *ps = cpts;
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ps += qspec[0].offset;
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ps += qspec[1].offset;
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for( int i=0; i!= qspec[0].order * qspec[0].width; i++ ) {
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for( int j = 0; j!= qspec[1].order * qspec[1].width; j++ ) {
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for( int k=0; k < nc; k++ )
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dprintf( "%g ", ps[i*qspec[0].stride + j*qspec[1].stride + k] );
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dprintf( "\n" );
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}
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dprintf( "\n" );
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}
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dprintf( "\n" );
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#endif
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}
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/*--------------------------------------------------------------------------
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* Quilt::select - find which map in each quilt contains the points
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* pta and ptb with pta[i] < ptb[i]
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*--------------------------------------------------------------------------
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*/
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void
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Quilt::select( REAL *pta, REAL *ptb )
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{
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int dim = eqspec - qspec;
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int i, j;
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for( i=0; i<dim; i++) {
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for( j=qspec[i].width-1; j>=0; j-- )
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if( (qspec[i].breakpoints[j] <= pta[i] ) &&
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(ptb[i] <= qspec[i].breakpoints[j+1] ) )
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break;
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assert( j != -1 );
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qspec[i].index = j;
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}
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}
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void
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Quilt::download( Backend &backend )
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{
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if( getDimension() == 2 ) {
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REAL *ps = cpts;
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ps += qspec[0].offset;
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ps += qspec[1].offset;
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ps += qspec[0].index * qspec[0].order * qspec[0].stride;
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ps += qspec[1].index * qspec[1].order * qspec[1].stride;
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backend.surfpts( mapdesc->getType(), ps,
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qspec[0].stride,
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qspec[1].stride,
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qspec[0].order,
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qspec[1].order,
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qspec[0].breakpoints[qspec[0].index],
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qspec[0].breakpoints[qspec[0].index+1],
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qspec[1].breakpoints[qspec[1].index],
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qspec[1].breakpoints[qspec[1].index+1] );
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} else {
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REAL *ps = cpts;
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ps += qspec[0].offset;
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ps += qspec[0].index * qspec[0].order * qspec[0].stride;
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backend.curvpts( mapdesc->getType(), ps,
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qspec[0].stride,
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qspec[0].order,
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qspec[0].breakpoints[qspec[0].index],
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qspec[0].breakpoints[qspec[0].index+1] );
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}
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}
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/*--------------------------------------------------------------------------
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* Quilt::downloadAll - download each map that contains the current patch
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*--------------------------------------------------------------------------
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*/
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void
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Quilt::downloadAll( REAL *pta, REAL *ptb, Backend &backend )
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{
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for( Quilt *m = this; m; m=m->next ) {
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m->select( pta, ptb );
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m->download( backend );
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}
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}
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/*--------------------------------------------------------------------------
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* Quilt::isCulled - determine if an entire quilt is trivially rejected.
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*--------------------------------------------------------------------------
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*/
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int
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Quilt::isCulled( void )
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{
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if( mapdesc->isCulling() )
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return mapdesc->xformAndCullCheck( cpts + qspec[0].offset + qspec[1].offset,
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qspec[0].order * qspec[0].width, qspec[0].stride,
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qspec[1].order * qspec[1].width, qspec[1].stride );
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else
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return CULL_ACCEPT;
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}
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/*---------------------------------------------------------------------------
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* Quilt::getRange - retrieve the valid paramater range of a set of quilts
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*---------------------------------------------------------------------------
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*/
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void
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Quilt::getRange( REAL *from, REAL *to, Flist& slist, Flist &tlist )
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{
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getRange( from, to, 0, slist );
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getRange( from, to, 1, tlist );
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}
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/*---------------------------------------------------------------------------
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* Quilt::getRange - retrieve the valid paramater range of a set of quilts
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*---------------------------------------------------------------------------
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*/
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void
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Quilt::getRange( REAL *from, REAL *to, int i, Flist &list )
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{
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Quilt *maps = this;
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from[i] = maps->qspec[i].breakpoints[0];
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to[i] = maps->qspec[i].breakpoints[maps->qspec[i].width];
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int maxpts = 0;
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Quilt_ptr m;
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for( m=maps; m; m=m->next ) {
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if( m->qspec[i].breakpoints[0] > from[i] )
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from[i] = m->qspec[i].breakpoints[0];
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if( m->qspec[i].breakpoints[m->qspec[i].width] < to[i] )
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to[i] = m->qspec[i].breakpoints[m->qspec[i].width];
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maxpts += m->qspec[i].width + 1;
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}
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list.grow( maxpts );
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for( m=maps; m; m=m->next )
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for( int j=0; j<=m->qspec[i].width; j++ ) {
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list.add( m->qspec[i].breakpoints[j] );
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}
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list.filter( );
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list.taper( from[i], to[i] );
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}
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void
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Quilt::getRange( REAL *from, REAL *to, Flist& slist )
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{
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getRange( from, to, 0, slist );
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}
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void
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Quilt::findRates( Flist& slist, Flist& tlist, REAL rate[2] )
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{
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findSampleRates( slist, tlist );
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rate[0] = qspec[0].step_size;
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rate[1] = qspec[1].step_size;
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for( Quilt *q = next; q; q = q->next ) {
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q->findSampleRates( slist, tlist );
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if( q->qspec[0].step_size < rate[0] )
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rate[0] = q->qspec[0].step_size;
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if( q->qspec[1].step_size < rate[1] )
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rate[1] = q->qspec[1].step_size;
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}
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}
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void
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Quilt::findSampleRates( Flist& slist, Flist& tlist )
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{
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qspec[0].step_size = DEF_PATCH_STEPSIZE *
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(qspec[0].breakpoints[qspec[0].width] - qspec[0].breakpoints[0]);
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qspec[1].step_size = DEF_PATCH_STEPSIZE *
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(qspec[1].breakpoints[qspec[1].width] - qspec[1].breakpoints[0]);
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for( int i = slist.start; i < slist.end-1; i++ ) {
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for( int j = tlist.start; j < tlist.end-1; j++ ) {
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REAL pta[2], ptb[2];
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pta[0] = slist.pts[i];
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ptb[0] = slist.pts[i+1];
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pta[1] = tlist.pts[j];
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ptb[1] = tlist.pts[j+1];
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Patchlist patchlist( this, pta, ptb );
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patchlist.getstepsize();
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{
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float edge_len_s = min(glu_abs(ptb[0]-pta[0]),1.0);
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float edge_len_t = min(glu_abs(ptb[1]-pta[1]),1.0);
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if( patchlist.getStepsize(0)/edge_len_s < qspec[0].step_size )
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qspec[0].step_size = patchlist.getStepsize(0)/edge_len_s;
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if( patchlist.getStepsize(1)/edge_len_t < qspec[1].step_size )
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qspec[1].step_size = patchlist.getStepsize(1)/edge_len_t;
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}
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}
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}
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}
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