1 files changed, 120 insertions, 0 deletions
diff --git a/src/3rdparty/2geom/src/toys/d2sbasis-fitting.cpp b/src/3rdparty/2geom/src/toys/d2sbasis-fitting.cpp
new file mode 100644
index 0000000..7e9b233
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+++ b/src/3rdparty/2geom/src/toys/d2sbasis-fitting.cpp
@@ -0,0 +1,120 @@
+/*
+ * 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
+    {
+        fmd2sb.instance(sb_curve, lsf_2dsb.result(prev_pts, 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(6),
+          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 :