WebcamTracker.h

#pragma once
/*	Quantum Minigolf, a computer game illustrating quantum mechanics
	Copyright (C) 2007 Friedemann Reinhard <friedemann.reinhard@gmail.com>

	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
*/


//WebcamTracker - configures a webcam, extracts the images and implements a simple
// image recognition algorithm to find the position of the - infrared marked - club
// in the scene. It tracks its position and detects the hits.
// To translate cam to screen coordinates, it needs to load a calibration file.

#include "quantumminigolf.h"
#include "Tracker.h"
#include <SDL.h>
#include <math.h>
#include <cameraTool.h>
#include <iostream>
#include <fstream>

using namespace std;

class WebcamTracker:public Tracker
{
public:
  WebcamTracker (int w, int h, int ix, int iy, int rball,
		 float vmax, Renderer * renderer);
   ~WebcamTracker (void);

  void Init ()
  {
  }
  void GetHit (float *v, float *phi);
  void AnimateHit (Uint32 duration, float v, float phi);

  int getix ()
  {
    return ix;
  }
  int getiy ()
  {
    return iy;
  }
  Renderer *renderer;
private:
  // conversion between camera and screen coordinates
  void cam2scr (float *x, float *y);
  void scr2cam (float *x, float *y);	//scr2cam is not operational yet.
  // provided only for future compatibility

  int rball;			// radius of the ball

  int cam;			// flag indicating whether a camera is present
  int cw, ch;			// width and height of camera image;

  float xx, xy, yx, yy;		// cam2screen matrix
  float cx, cy;			// coordinates of the "Abschlag" in cam coordinates

  // handle to the webcam
  cameraEngine *camera;
};