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+/*
+** 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.
+*/
+
+/*
+ * quilt.c++
+ *
+ * $Date: 2001/03/17 00:25:41 $ $Revision: 1.1 $
+ * $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/internals/quilt.cc,v 1.1 2001/03/17 00:25:41 brianp Exp $
+ */
+
+#include "glimports.h"
+#include "mystdio.h"
+#include "myassert.h"
+#include "quilt.h"
+#include "backend.h"
+#include "mapdesc.h"
+#include "flist.h"
+#include "knotvector.h"
+#include "patchlist.h"
+#include "math.h" //fabs()
+#include "simplemath.h" //min()
+
+/* local preprocessor definitions */
+#define DEF_PATCH_STEPSIZE .4
+#define fsizeof(x) (sizeof(x)/sizeof(REAL))
+
+
+Quilt::Quilt( Mapdesc *_mapdesc )
+{
+ mapdesc = _mapdesc;
+}
+
+void
+Quilt::deleteMe( Pool& p )
+{
+ for( Quiltspec *q=qspec; q != eqspec; q++ ) {
+#if 1
+ if( q->breakpoints) delete[] q->breakpoints; q->breakpoints = 0;
+#else
+ if( q->breakpoints) {
+ delete[] q->breakpoints;
+ q->breakpoints = 0;
+printf("in here\n");
+ }
+#endif
+ }
+ if( cpts ) delete[] cpts;
+ cpts = 0;
+ PooledObj::deleteMe( p );
+}
+
+void
+Quilt::show( void )
+{
+#ifndef NDEBUG
+ int nc = mapdesc->getNcoords();
+ REAL *ps = cpts;
+ ps += qspec[0].offset;
+ ps += qspec[1].offset;
+ for( int i=0; i!= qspec[0].order * qspec[0].width; i++ ) {
+ for( int j = 0; j!= qspec[1].order * qspec[1].width; j++ ) {
+ for( int k=0; k < nc; k++ )
+ dprintf( "%g ", ps[i*qspec[0].stride + j*qspec[1].stride + k] );
+ dprintf( "\n" );
+ }
+ dprintf( "\n" );
+ }
+ dprintf( "\n" );
+#endif
+}
+
+/*--------------------------------------------------------------------------
+ * Quilt::select - find which map in each quilt contains the points
+ * pta and ptb with pta[i] < ptb[i]
+ *--------------------------------------------------------------------------
+ */
+
+void
+Quilt::select( REAL *pta, REAL *ptb )
+{
+ int dim = eqspec - qspec;
+ int i, j;
+ for( i=0; i<dim; i++) {
+ for( j=qspec[i].width-1; j>=0; j-- )
+ if( (qspec[i].breakpoints[j] <= pta[i] ) &&
+ (ptb[i] <= qspec[i].breakpoints[j+1] ) )
+ break;
+ assert( j != -1 );
+ qspec[i].index = j;
+ }
+}
+
+void
+Quilt::download( Backend &backend )
+{
+ if( getDimension() == 2 ) {
+ REAL *ps = cpts;
+ ps += qspec[0].offset;
+ ps += qspec[1].offset;
+ ps += qspec[0].index * qspec[0].order * qspec[0].stride;
+ ps += qspec[1].index * qspec[1].order * qspec[1].stride;
+ backend.surfpts( mapdesc->getType(), ps,
+ qspec[0].stride,
+ qspec[1].stride,
+ qspec[0].order,
+ qspec[1].order,
+ qspec[0].breakpoints[qspec[0].index],
+ qspec[0].breakpoints[qspec[0].index+1],
+ qspec[1].breakpoints[qspec[1].index],
+ qspec[1].breakpoints[qspec[1].index+1] );
+ } else {
+ REAL *ps = cpts;
+ ps += qspec[0].offset;
+ ps += qspec[0].index * qspec[0].order * qspec[0].stride;
+ backend.curvpts( mapdesc->getType(), ps,
+ qspec[0].stride,
+ qspec[0].order,
+ qspec[0].breakpoints[qspec[0].index],
+ qspec[0].breakpoints[qspec[0].index+1] );
+ }
+}
+
+/*--------------------------------------------------------------------------
+ * Quilt::downloadAll - download each map that contains the current patch
+ *--------------------------------------------------------------------------
+ */
+
+void
+Quilt::downloadAll( REAL *pta, REAL *ptb, Backend &backend )
+{
+ for( Quilt *m = this; m; m=m->next ) {
+ m->select( pta, ptb );
+ m->download( backend );
+ }
+}
+
+/*--------------------------------------------------------------------------
+ * Quilt::isCulled - determine if an entire quilt is trivially rejected.
+ *--------------------------------------------------------------------------
+ */
+
+int
+Quilt::isCulled( void )
+{
+ if( mapdesc->isCulling() )
+ return mapdesc->xformAndCullCheck( cpts + qspec[0].offset + qspec[1].offset,
+ qspec[0].order * qspec[0].width, qspec[0].stride,
+ qspec[1].order * qspec[1].width, qspec[1].stride );
+ else
+ return CULL_ACCEPT;
+}
+
+/*---------------------------------------------------------------------------
+ * Quilt::getRange - retrieve the valid paramater range of a set of quilts
+ *---------------------------------------------------------------------------
+ */
+void
+Quilt::getRange( REAL *from, REAL *to, Flist& slist, Flist &tlist )
+{
+ getRange( from, to, 0, slist );
+ getRange( from, to, 1, tlist );
+}
+
+/*---------------------------------------------------------------------------
+ * Quilt::getRange - retrieve the valid paramater range of a set of quilts
+ *---------------------------------------------------------------------------
+ */
+void
+Quilt::getRange( REAL *from, REAL *to, int i, Flist &list )
+{
+ Quilt *maps = this;
+ from[i] = maps->qspec[i].breakpoints[0];
+ to[i] = maps->qspec[i].breakpoints[maps->qspec[i].width];
+ int maxpts = 0;
+ Quilt_ptr m;
+ for( m=maps; m; m=m->next ) {
+ if( m->qspec[i].breakpoints[0] > from[i] )
+ from[i] = m->qspec[i].breakpoints[0];
+ if( m->qspec[i].breakpoints[m->qspec[i].width] < to[i] )
+ to[i] = m->qspec[i].breakpoints[m->qspec[i].width];
+ maxpts += m->qspec[i].width + 1;
+ }
+
+ list.grow( maxpts );
+
+ for( m=maps; m; m=m->next )
+ for( int j=0; j<=m->qspec[i].width; j++ ) {
+ list.add( m->qspec[i].breakpoints[j] );
+ }
+
+ list.filter( );
+ list.taper( from[i], to[i] );
+}
+
+void
+Quilt::getRange( REAL *from, REAL *to, Flist& slist )
+{
+ getRange( from, to, 0, slist );
+}
+
+void
+Quilt::findRates( Flist& slist, Flist& tlist, REAL rate[2] )
+{
+ findSampleRates( slist, tlist );
+ rate[0] = qspec[0].step_size;
+ rate[1] = qspec[1].step_size;
+
+ for( Quilt *q = next; q; q = q->next ) {
+ q->findSampleRates( slist, tlist );
+ if( q->qspec[0].step_size < rate[0] )
+ rate[0] = q->qspec[0].step_size;
+ if( q->qspec[1].step_size < rate[1] )
+ rate[1] = q->qspec[1].step_size;
+ }
+}
+
+void
+Quilt::findSampleRates( Flist& slist, Flist& tlist )
+{
+ qspec[0].step_size = DEF_PATCH_STEPSIZE *
+ (qspec[0].breakpoints[qspec[0].width] - qspec[0].breakpoints[0]);
+ qspec[1].step_size = DEF_PATCH_STEPSIZE *
+ (qspec[1].breakpoints[qspec[1].width] - qspec[1].breakpoints[0]);
+
+ for( int i = slist.start; i < slist.end-1; i++ ) {
+ for( int j = tlist.start; j < tlist.end-1; j++ ) {
+
+ REAL pta[2], ptb[2];
+ pta[0] = slist.pts[i];
+ ptb[0] = slist.pts[i+1];
+ pta[1] = tlist.pts[j];
+ ptb[1] = tlist.pts[j+1];
+ Patchlist patchlist( this, pta, ptb );
+ patchlist.getstepsize();
+
+ {
+ float edge_len_s = min(fabs(ptb[0]-pta[0]),1.0);
+ float edge_len_t = min(fabs(ptb[1]-pta[1]),1.0);
+
+ if( patchlist.getStepsize(0)/edge_len_s < qspec[0].step_size )
+ qspec[0].step_size = patchlist.getStepsize(0)/edge_len_s;
+ if( patchlist.getStepsize(1)/edge_len_t < qspec[1].step_size )
+ qspec[1].step_size = patchlist.getStepsize(1)/edge_len_t;
+ }
+ }
+ }
+}
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