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/*
* D2<SBasis> Fitting Example
*
* Authors:
* Marco Cecchetti <mrcekets at gmail.com>
*
* Copyright 2008 authors
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*/
#include <2geom/numeric/fitting-tool.h>
#include <2geom/numeric/fitting-model.h>
#include <2geom/d2.h>
#include <2geom/sbasis.h>
#include <toys/path-cairo.h>
#include <toys/toy-framework-2.h>
using namespace Geom;
class D2SBasisFitting : public Toy
{
private:
void draw( cairo_t *cr, std::ostringstream *notify,
int width, int height, bool save, std::ostringstream *timer_stream) override
{
bool changed = false;
for (size_t i = 0; i < total_handles; ++i)
{
if (psh.pts[i] != prev_pts[i])
{
changed = true;
break;
}
}
if (changed)
{
for (size_t k = 0; k < 200; ++k)
{
lsf_2dsb.clear();
lsf_2dsb.append(0);
lsf_2dsb.append(0.33);
double t = 0;
for (size_t i = 2; i < total_handles-2; ++i)
{
t = nearest_time(psh.pts[i], sb_curve);
lsf_2dsb.append(t);
}
lsf_2dsb.append(0.66);
lsf_2dsb.append(1);
lsf_2dsb.update();
fmd2sb.instance(sb_curve, lsf_2dsb.result(psh.pts));
}
prev_pts = psh.pts;
}
cairo_set_source_rgba(cr, 0.3, 0.3, 0.3, 1.0);
cairo_set_line_width (cr, 0.3);
cairo_d2_sb(cr, sb_curve);
cairo_stroke(cr);
Toy::draw(cr, notify, width, height, save,timer_stream);
}
public:
D2SBasisFitting()
: sb_curve(),
total_handles(8),
order(total_handles / 2 - 1),
fmd2sb(order),
lsf_2dsb(fmd2sb, total_handles),
prev_pts()
{
step = 1.0 / (total_handles - 1);
for (size_t i = 0; i < total_handles; ++i)
{
psh.push_back(400*uniform() + 50, 300*uniform() + 50);
}
handles.push_back(&psh);
double t = 0;
for (size_t i = 0; i < total_handles; ++i)
{
lsf_2dsb.append(t);
t += step;
}
prev_pts = psh.pts;
lsf_2dsb.update();
fmd2sb.instance(sb_curve, lsf_2dsb.result(prev_pts));
}
private:
D2<SBasis> sb_curve;
unsigned int total_handles;
unsigned int order;
NL::LFMD2SBasis fmd2sb;
NL::least_squeares_fitter<NL::LFMD2SBasis> lsf_2dsb;
std::vector<Point> prev_pts;
double step;
PointSetHandle psh;
};
int main(int argc, char **argv)
{
init( argc, argv, new D2SBasisFitting(), 600, 600 );
return 0;
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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