//   myCircle class
//   *methods*
//   - boolean grow(double)
//   - void changeColor(int, int, int)
//   - void changeThickness(double)
//   - void draw()
//
//   *variable*
//   - float centerX, float centerY, float centerZ; OR PVector center
//   - double radius  
//   - int color
//   - int thickness

class MyCircle
{
  //field
  PVector center;
  float radius;
  int col;
  float thickness;
  
  //constructor
  MyCircle(PVector c, float r)
  {
    this.center = c;
    this.radius = r;
    this.thickness = 0.5;
  }
  
  boolean Grow(float deltaRad)
  {
    float temp =0;
    if(this.radius > 20) 
    {
      temp = abs(this.radius - deltaRad);
      this.radius = temp;
    }
    else
    {
      temp = abs(this.radius + deltaRad);
      this.radius = temp;
    }
    return true;
  }
  
  void ChangeColor(int col)
  {
    this.col = col;
  }
  
  void ChangeThickness(float t)
  {
    this.thickness = t;
  }
  
  void Draw(float deltaMouse)
  {
    noStroke();
    fill(col,max(min(500/(deltaMouse+0.1),100),0)+10);
    ellipse(center.x, center.y, (float)radius, (float)radius);
  }
  
  void Move(float x, float y)
  {
    this.center.x = x;
    this.center.y = y;
  }
}