boolean debug = false;
Vogel[] vogel;
int vogelAnzahl = 200; // number of birds
float dirAdap = 0.05;  // rate for adapting direction
float speedAdap = 0.03; // rate for adapting speed

Feld[][] feld;
int colums = 16; //grid colums
int rows = 16; //grid rows


void drawGrid()  //draws a 2D-grid; visualises Feld!!
{
  strokeWeight(1);
  stroke(60);
  float distX = width/ (float)colums;
  float distY = height/ (float)rows;
  for (int i=0; i<rows; i++)
  {
    line(0, i* distY, width, i* distY);
  }
  for (int i=0; i<colums; i++)
  {
    line(i *distX, 0, i *distX, height);
  }
}

void setup()
{
  size(400, 400);
  background(0);
  feld = new Feld[colums][rows];
  
  
  vogel = new Vogel[vogelAnzahl];
  for (int i=0; i<vogel.length; i++)
  {
    vogel[i] = new Vogel(i, 1.0, 3.0, 3, #DDDDDD);
  }
  //special bird
  vogel[0].setColor(#FF0000); // just for kicks: the first bird is red!
  vogel[0].setVogelSize(5);   // and fat
  
}

void draw()
{
//  noLoop();
  background(0);
  stroke(50);
  drawGrid();
  stroke(255);
  for (int i=0; i<colums; i++)
  {
    for (int k=0; k<rows; k++)
    {
      feld[i][k] = new Feld();
/*      if (debug)
      {
        print("  FELD " +i +"|" +k + "  (" +feld[i][k].vogelliste.length +" Vögel): ");
        print(feld[i][k].vogelliste);// +feld[i][k].getVogelliste());
        println();
       }
*/
    }
  }

  for (int i=0; i<vogel.length; i++)
  {
    vogel[i].setFeld();
    int x = vogel[i].getFeldX();
    int y = vogel[i].getFeldY();
    feld[x][y].addVogel(i);
    if (mousePressed)
    {
      vogel[i].setDirection(vogel[i].getDirection()+random(-20, 20)); //randomize direction
    }else
    {
      vogel[i].adaptDirection( vogel[i].getClosestNeighbours() );
    }

  }
  for (int i=0; i<vogel.length; i++)
  {
    vogel[i].fly();
    vogel[i].drawVogel();
  }  
//  if(debug) println("##############################");
//    if (debug)  print(vogel[0].getClosestNeighbours() );
//    if (debug) println();
//      print(feld[0][0].vogelliste);
//      println();
//    vogel[0].adaptDirection( vogel[0].getClosestNeighbours() );

}