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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++
*
*/
#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" //fglu_abs()
#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++ )
_glu_dprintf( "%g ", ps[i*qspec[0].stride + j*qspec[1].stride + k] );
_glu_dprintf( "\n" );
}
_glu_dprintf( "\n" );
}
_glu_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(glu_abs(ptb[0]-pta[0]),1.0);
float edge_len_t = min(glu_abs(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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