//seed & trunk object
//growAgain & display function

class Seed 
{
  float bx, by;
  float sSize;
  color sColor;

  //minimum distance between the ellipse
  int MIN_DISTANCE = 1;
  float angle = 1;



 Seed()
  {
  }

  Seed(float x, float y, float s) 
  {
    bx = x;

    by = y;

    sSize = s;
    
    sColor = color(random(200),40);
  }

  

//using boolean (grow) to check the second or more release
//growing toward the next mouse release
  void growAgain(float xx, float yy)
  {
    if (grow == true) 
    {
      float x = xx;
      float y = yy;

      if ( sqrt( sq(x - bx) + sq(y - by)) > MIN_DISTANCE ) 
      {
        angle = atan2(x - bx, y - by);

        bx += MIN_DISTANCE * sin(angle); 

        by += MIN_DISTANCE * cos(angle);
        
        bx += noise(bx);

        by += noise(by);
      }
    }  
  }


//displaying the ellipse to make the grow animation  
//translating the 0,0 position to move the ellipse
  void display()
  {

    fill(sColor);

    pushMatrix();

    translate(bx, by);

    ellipse(0, 0, sSize, sSize);

    popMatrix();
  }
}