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Cylinder.h

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// $Id: Cylinder.h,v 1.2 2000/01/18 00:42:06 burnett Exp $
//
//

#ifndef __CYLINDER_H
#define __CYLINDER_H

#include "geometry/Surface.h"


/*
  Sign of radius parameter determines inside/outside:
    positive: "inside" is inside the cylinder.
*/
class Cylinder: public Surface
{

public:
  Cylinder(const Point& origin, double radius);
  Cylinder( const Point& origin, const Vector& axis, double radius );

  double how_near( const Point& x ) const;
  double distance( const Point& x, const Vector& v, int inout)const;
  // basic specification of this surface

   virtual Vector normal( const Point& x )const;

  const Vector& axis()const{return Surface::direction();}

  const char *nameOf() const { return "Cylinder"; }
  void printOn( std::ostream& os = std::cout ) const;

  double radius()const{return _radius;}
  virtual void setOffset(double offset){_radius=offset;};
  virtual double offset()const{return _radius;};
        

 private:
        double _radius; // radius of Cylinder (sign indicates inside/outside)
};

#endif

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