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//    Vamos Automotive Simulator
//  Copyright (C) 2001--2002 Sam Varner
//  This program is free software; you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation; either version 2 of the License, or
//  (at your option) any later version.
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  GNU General Public License for more details.
//  You should have received a copy of the GNU General Public License
//  along with this program; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


#include <vamos/geometry/Two_Point.h>
#include <vector>

namespace Vamos_Geometry
  class Interpolator
      // Construct an empty curve.
      Interpolator () {};

      // Construct a cuvre from an array of points.
      Interpolator (const std::vector <Two_Point>& points) {};

      //virtual ~Interpolator () {};

      // Add a point to the curve.
      virtual void load (const Two_Point& point) = 0;

      // Add multiple points to the curve.
      virtual void load (const std::vector <Two_Point>& points) = 0;
      // Remove all points from the curve.
      virtual void clear () = 0;

      // Remove points with x > LIMIT.
      virtual void remove_greater (double limit) = 0;

      // Scale all of the x values by FACTOR.
      virtual void scale (double factor) = 0;

      // Return the y value at the x value DIST
      virtual double interpolate (double dist) const = 0;

      // Return the normal to the tanget at DIST.
      virtual Two_Point normal (double dist) const = 0;


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