include/vamos/geometry/Interpolator.h

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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
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  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

#ifndef _INTERPOLATOR_H_
#define _INTERPOLATOR_H_

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

namespace Vamos_Geometry
{
  class Interpolator
  {
  public:
        // 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;
  };
}

#endif

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