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Surface.h

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// $Id: Surface.h,v 1.2 2000/01/18 00:42:09 burnett Exp $
//
//

#ifndef GEOMETRY_SURFACE_H
#define GEOMETRY_SURFACE_H

#include "geometry/Point.h"
#include <float.h> // for FLT_MAX on NT
class Surface : public GeomObject
{

 public:
 
    virtual int inside(const Point& p)const{ return ( how_near( p ) >= 0 ); }


    virtual double how_near( const Point& x ) const=0;

 
    virtual double distance( const Point& x, const Vector& v, int inout)const=0;

    virtual Vector normal( const Point& x )const=0;


    virtual GeomObject& transform(const CoordTransform& T );

    virtual void reverse();

    const Point& origin()const{return referencePoint;}

    const Vector& direction() const { return referenceDirection; }

  
    virtual Surface& copy()const;

    virtual void setOffset(double){};
    virtual double offset()const{return FLT_MAX;};


 protected:
    Surface( const Point& o, const Vector& n )
        : referencePoint( o ), referenceDirection(n) 
    {}
    // only subclasses can implement

    Surface(const Surface&);
    // copy constructor not accessible

 
 private:

    const Point& referencePoint;  
    // reference point to use: defined elsewhere
  
    Vector referenceDirection;    
    // direction: normal for a plane surface, axis  for cylinder


};
//---------------------------------------------------------------------
//                 inlines
//---------------------------------------------------------------------

inline std::ostream& operator<<( std::ostream& os, const Surface& s )
  { s.printOn(os); return os;}

inline std::ostream& operator<<( std::ostream& os, const Surface* s )
  { s->printOn(os); return os;}

#endif

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