include/vrfobjcore/pathMetric.h

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/*******************************************************************************
** Copyright (c) 2004 MAK Technologies, Inc.
** All rights reserved.
*******************************************************************************/
/*******************************************************************************
** $RCSfile: pathMetric.h,v $ $Revision: 1.4 $ $State: Exp $
*******************************************************************************/



#ifndef pathMetric_H_
#define pathMetric_H_

#include "geometry/point.h"
#include "vrfobjcore/pathMetricFact.h"

class DtVrfObject;
class DtChordIntersectionRecord;

#include "vrfobjcore/vrfobjcoreDefines.h"
class DT_DLL_vrfobjcore DtPathMetric
{
private:
   DtPathMetric();
   DtPathMetric(const DtPathMetric& orig);
   DtPathMetric& operator=(const DtPathMetric& orig);

public:
   DtPathMetric(DtVrfObject* entity);

   virtual ~DtPathMetric();
   
   virtual bool init();

   virtual double transitionCost(const DtPoint& startPoint, 
         const DtPoint& endPoint) const = 0;

   virtual double turningCost(double cosAngle) const = 0;

   virtual double heuristic(const DtPoint& point, const DtPoint& goalPoint) const;

   virtual DtVrfObject* entity();
   virtual const DtVrfObject* entity() const;

   static void addPathMetricCreatorFcn(const DtString& type, 
      DtPathMetricCreatorFcn fcn);

   static DtPathMetricFactory* factory();
   static void setFactory(DtPathMetricFactory* factory);

   static DtPathMetric* createPathMetric(const DtString& type, DtVrfObject* entity);

protected:
   DtVrfObject* myEntity;
   static DtPathMetricFactory* theFactory;
};

#endif