1 files changed, 74 insertions, 0 deletions
diff --git a/noatun/library/spline.h b/noatun/library/spline.h
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+/*
+Copyright (C) 1998 Jürgen Hochwald <juergen.hochwald@privat.kkf.net>
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this library; see the file COPYING.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.
+*/
+
+
+
+#ifndef SPLINE_H
+#define SPLINE_H
+
+#include <stdlib.h>
+#include <vector>
+
+class Spline
+{
+	struct Group
+	{
+		double x, y, y2;
+	};
+	
+	std::vector<Spline::Group> mPoints;
+	bool mRecalc;
+	double yp1;
+	double ypn;
+	
+	// stupid AIX[?] compiler won't let me give it a value here
+	static const bool natural;
+
+public:
+	Spline();
+	Spline(const Spline &copy);
+	
+	Spline &operator =(const Spline &copy);
+	~Spline();
+	
+	/**
+	 * if the curve had @p count points, return them
+	 **/
+	std::vector<double> points(int count) const;
+	
+	void add(double x, double y);
+	double spline(double xarg) const;
+	double operator[] (double xarg) const { return spline(xarg); }
+	int numPoints() const { return mPoints.size(); }
+	double x(int num) const;
+	double y(int num) const;
+
+	void clear();
+	
+private:
+	void calcSpline() const
+	{
+		const_cast<Spline*>(this)->calcSpline();
+	}
+	void calcSpline();
+	
+};
+
+#endif
+