// The Virus class
class Virus {

  // Properties to help tracking and drawing the Virus
  float xpos;
  float ypos; 
  float xgrowth;
  float ygrowth;
  color gcolor;
  float directionX, directionY;
  float velocityX, velocityY;

  // The constructor for the Virus class
  Virus(float _x, float _y, float _xg, float _yg, color _gcolor, float _directionX, float _directionY) {
    xpos = _x;
    ypos = _y;
    xgrowth = _xg;
    ygrowth = _yg;
    gcolor = _gcolor;
    directionX = _directionX;
    directionY = _directionY;
  }

  // Display function for the Virus
  void display() {
    noStroke();
    fill(color(gcolor));
    ellipse(xpos,ypos,xgrowth,ygrowth);
  }

  // Move function for the Virus 
  void move() {
    velocityX = directionX;
    velocityY = directionY;
    xpos += velocityX;
    ypos += velocityY;
  } 

  // Grow function for the Virus
  // Growth per frame circle set, if the virus cells grow bigger
  // Than 200 pixels we make sure they stop growing
  void grow() {
    // xgrowth = xgrowth + 0.05;
    // ygrowth = ygrowth + 0.05;
    if (xgrowth > 200) {
      xgrowth = 200;
      ygrowth = 200;
    }
  }
}