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/*
* 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 SBasisFitting : public Toy
{
private:
void draw( cairo_t *cr, std::ostringstream *notify,
int width, int height, bool save, std::ostringstream *timer_stream) override
{
sliders[0].geometry(Point(50, 30), 100);
size_t value = (size_t)(sliders[0].value());
if (degree != value)
{
degree = value;
total_handles = degree + 1;
order = total_handles/2 - 1;
dstep = interval_length/degree;
step = 1.0/degree;
double x = sx;
psh.pts.clear();
for (size_t i = 0; i < total_handles; ++i)
{
psh.push_back(x, 300*uniform()+50);
x += dstep;
}
handles[0] = &psh;
if (fmsb != NULL) delete fmsb;
fmsb = new NL::LFMSBasis(order);
assert(fmsb != NULL);
if (lsf_sb != NULL) delete lsf_sb;
lsf_sb = new NL::least_squeares_fitter<NL::LFMSBasis>(*fmsb, 25);
assert(lsf_sb != NULL);
double t = 0;
for (size_t i = 0; i < total_handles; ++i)
{
lsf_sb->append(t);
t += step;
}
lsf_sb->update();
curr_ys.clear();
curr_ys.resize(total_handles);
for (size_t i = 0; i < total_handles; ++i)
{
curr_ys[i] = psh.pts[i][Y];
}
prev_ys = curr_ys;
fmsb->instance(sb_curve, lsf_sb->result(curr_ys));
}
else
{
double x = sx;
for (size_t i = 0; i < total_handles; ++i)
{
psh.pts[i][X] = x;
curr_ys[i] = psh.pts[i][Y];
x += dstep;
}
fmsb->instance(sb_curve, lsf_sb->result(prev_ys, curr_ys));
prev_ys = curr_ys;
}
D2<SBasis> curve;
curve[X] = SBasis(Linear(sx,sx) + interval_length * Linear(0, 1));
curve[Y] = sb_curve;
cairo_set_source_rgba(cr, 0.3, 0.3, 0.3, 1.0);
cairo_set_line_width (cr, 0.3);
cairo_d2_sb(cr, curve);
cairo_stroke(cr);
Toy::draw(cr, notify, width, height, save,timer_stream);
}
public:
SBasisFitting()
: degree(3),
total_handles(degree+1),
order(total_handles/2 - 1),
interval_length(400),
dstep(interval_length/degree),
step(1.0/degree)
{
sx = 50;
double x = sx;
for (size_t i = 0; i < total_handles; ++i)
{
psh.push_back(x, 300*uniform()+50);
x += dstep;
}
handles.push_back(&psh);
fmsb = new NL::LFMSBasis(order);
assert(fmsb != NULL);
lsf_sb = new NL::least_squeares_fitter<NL::LFMSBasis>(*fmsb, 25);
assert(lsf_sb != NULL);
double t = 0;
for (size_t i = 0; i < total_handles; ++i)
{
lsf_sb->append(t);
t += step;
}
lsf_sb->update();
curr_ys.clear();
curr_ys.resize(total_handles);
for (size_t i = 0; i < total_handles; ++i)
{
curr_ys[i] = psh.pts[i][Y];
}
prev_ys = curr_ys;
fmsb->instance(sb_curve, lsf_sb->result(curr_ys));
sliders.emplace_back(1, 11, 2, 3, "degree");
handles.push_back(&(sliders[0]));
}
~SBasisFitting() override
{
if (fmsb != NULL) delete fmsb;
if (lsf_sb != NULL) delete lsf_sb;
}
private:
size_t degree;
size_t total_handles;
size_t order;
double interval_length;
double dstep;
double step;
double sx;
std::vector<double> curr_ys, prev_ys;
SBasis sb_curve;
NL::LFMSBasis* fmsb;
NL::least_squeares_fitter<NL::LFMSBasis>* lsf_sb;
PointSetHandle psh;
std::vector<Slider> sliders;
};
int main(int argc, char **argv)
{
init( argc, argv, new SBasisFitting(), 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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