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/*  Project STARSHATTER
	John DiCamillo
	Copyright © 1997-2002. All Rights Reserved.

	SUBSYSTEM:    Stars.exe
	FILE:         Contact.h
	AUTHOR:       John DiCamillo


	OVERVIEW
	========
	Sensor Contact class
*/

#ifndef Contact_h
#define Contact_h

#include "Types.h"
#include "SimObject.h"
#include "System.h"
#include "Geometry.h"

// +--------------------------------------------------------------------+

class Ship;
class Shot;

class Contact : public SimObserver
{
	friend class Sensor;

public:
	static const char* TYPENAME() { return "Contact"; }

	Contact();
	Contact(Ship* s, float p, float a);
	Contact(Shot* s, float p, float a);
	virtual ~Contact();

	int operator == (const Contact& c) const;

	Ship*    GetShip()   const { return ship;  }
	Shot*    GetShot()   const { return shot;  }
	Point    Location()  const { return loc;   }

	double   PasReturn() const { return d_pas; }
	double   ActReturn() const { return d_act; }
	bool     PasLock()   const;
	bool     ActLock()   const;
	double   Age()       const;
	bool     IsProbed()  const { return probe; }

	DWORD    AcquisitionTime() const { return acquire_time; }

	int      GetIFF(const Ship* observer)    const;
	void     GetBearing(const Ship* observer, double& az, double& el, double& r) const;
	double   Range(const Ship* observer,
	double      limit=75e3)   const;

	bool     InFront(const Ship* observer)   const;
	bool     Threat(const Ship* observer)    const;
	bool     Visible(const Ship* observer)   const;

	void     Reset();
	void     Merge(Contact* c);
	void     ClearTrack();
	void     UpdateTrack();
	int      TrackLength()     const { return ntrack;   }
	Point    TrackPoint(int i) const;

	virtual bool         Update(SimObject* obj);
	virtual const char*  GetObserverName() const;

private:
	Ship*    ship;
	Shot*    shot;
	Point    loc;
	DWORD    acquire_time;
	DWORD    time;

	Point*   track;
	int      ntrack;
	DWORD    track_time;

	float    d_pas;   // power output
	float    d_act;   // mass, size
	bool     probe;   // scanned by probe
};

#endif Contact_h