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Diffstat (limited to 'src/toys/elliptiarc-curve-fitting.cpp')
-rw-r--r-- | src/toys/elliptiarc-curve-fitting.cpp | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/src/toys/elliptiarc-curve-fitting.cpp b/src/toys/elliptiarc-curve-fitting.cpp new file mode 100644 index 0000000..6c47f8d --- /dev/null +++ b/src/toys/elliptiarc-curve-fitting.cpp @@ -0,0 +1,127 @@ +/* + * Elliptical Arc Fitting Toy + * + * 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 <gsl/gsl_linalg.h> + +#include <2geom/d2.h> +#include <2geom/sbasis.h> +#include <2geom/path.h> +#include <2geom/bezier-to-sbasis.h> +#include <2geom/elliptical-arc.h> + +#include <toys/path-cairo.h> +#include <toys/toy-framework-2.h> + + + +using namespace Geom; + + + +class EAFittingToy : public Toy +{ + private: + void draw( cairo_t *cr, std::ostringstream *notify, + int width, int height, bool save, std::ostringstream *timer_stream) override + { + cairo_set_line_width (cr, 0.2); + cairo_set_source_rgb(cr, 0.0, 0.0, 0.); + //D2<SBasis> SB = handles_to_sbasis(handles.begin(), total_handles - 1); + D2<SBasis> SB = psh.asBezier(); + cairo_d2_sb(cr, SB); + cairo_stroke(cr); + + cairo_set_line_width (cr, 0.4); + cairo_set_source_rgba(cr, 0.0, 0.0, 0.7, 1.0); + try + { + EllipticalArc EA; + if (!arc_from_sbasis(EA, SB, tolerance, 10)) { +// *notify << "distance error: " << convert.get_error() +// << " ( " << convert.get_bound() << " )" << std::endl +// << "angle error: " << convert.get_angle_error() +// << " ( " << convert.get_angle_tolerance() << " )"; + Toy::draw(cr, notify, width, height, save,timer_stream); + return; + } + D2<SBasis> easb = EA.toSBasis(); + cairo_d2_sb(cr, easb); + cairo_stroke(cr); + } + catch( RangeError e ) + { + std::cerr << e.what() << std::endl; + Toy::draw(cr, notify, width, height, save,timer_stream); + return; + } + + Toy::draw(cr, notify, width, height, save,timer_stream); + } + + public: + EAFittingToy( double _tolerance ) + : tolerance(_tolerance) + { + handles.push_back(&psh); + total_handles = 6; + for ( unsigned int i = 0; i < total_handles; ++i ) + { + psh.push_back(uniform()*400, uniform()*400); + } + } + + PointSetHandle psh; + unsigned int total_handles; + double tolerance; +}; + + + +int main(int argc, char **argv) +{ + double tolerance = 8; + if(argc > 1) + sscanf(argv[1], "%lf", &tolerance); + init( argc, argv, new EAFittingToy(tolerance) ); + 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: +*/ |