Giving Cells tendency to one direction...

//This code has been derived from the ARC8068 Lecture 2.

//The aim is to achieve the first task given in the lecture

//The task is increasing number of cells, changing their speed and 

//giving them a tendency to move toward one direction.

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Cell[] myCells = new Cell[250];

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void setup(){

  size(600,600);  //or I can increase the screen size, as well

  for (int i=0; i<myCells.length; i++){

    myCells[i]=new Cell();  

  }

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frameRate(10);  

}

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void draw(){

  background(255);

  for(int i=0; i<myCells.length; i++){

  myCells[i].display();

  myCells[i].update();

}

}

// This tab defines the behaviour of the cells.

// Or I call this new tab DNA page of the cell.

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class Cell{

  float s= 1;   // This allows me to see an individual cell in bigger size on the screen, to observe the behaviour.

  float xlocation, ylocation; // Starting point on matrix

  float dia; //dimention

  float cellred, cellgreen, cellblue; //Color definitions combined in one line

  float lineweight; //stroke...

  boolean isseed; //whether the cell is seed or just independent one... (at this stage, I am not exactly sure what is this for)

  Cell(){    //define the parameters

    xlocation=random(0,600);    // I want cell to appear in random points

    ylocation=random(0,600);

    dia=5*s;  // This is the parameter I made cells smaller /////s = scale

    isseed =false;  //Again, just keeping it. Do not know what its purpose

    cellred=10;

    cellgreen=200;

    cellblue=200;

    lineweight=0.5;

  }

  void display(){    // First function created to make cells visible on screen

    stroke(lineweight);

    fill(cellred,cellgreen,cellblue);

    ellipse(xlocation,ylocation,dia,dia);

}

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  void update(){        //Funtion to give cells motion. And I will make my intervention here to change the speed as well as the frame rate.

    xlocation=xlocation+random(-0.5,4);

    ylocation=ylocation+random(-2,3);

    // In original code, since increasement is define equally in x and y directions, all indivudial cells show a neutral behaviour.

    //In case I change the difference in increasement between x and y marigins, I will achieve to give cells tendency in one direction.

    //To do this, I set the number of cells to 1, and observed the behaviour of cell in bigger size, first.

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}

}