//A simple class which is very much like a ball, except controlled
//  directly by the players

public class Paddle
{
  public float r;  //Radius
  public int rVal,gVal,bVal,rValOrig,gValOrig,bValOrig; //Color Values

  public boolean blueSwitch;   //Am I currently activated?
  public boolean bsPrevFrame;  //Was I activated last frame?

  public boolean FiredThisFrame; //So that we only fire once when tested

  //To use the paddle class, you need to use Get and Set methods, since they hide
  // physics logic
  private Vector2D Pos;
  private Vector2D Vel;  //This will need to be calculated each frame
  
  Paddle()
  {
     Pos = new Vector2D();
     Vel = new Vector2D();
     r = 20.0f;
     blueSwitch = false;
     bsPrevFrame = false;
     FiredThisFrame = false;
     //rVal = 0;
     //gVal = 0;
     //bVal = 0;
  }

  public void SetPosition(float x, float y, float delta_t) //be sure to run this function whenever changing paddle position
  {
    //Uses a simple Verlet scheme to determine the velocity of the paddle from two positions
    Vector2D dPos = new Vector2D(x-Pos.x, y-Pos.y);
    Pos.Set(x,y);
    if (delta_t != 0.0f)
      Vel.Set(dPos.Times(1/delta_t));
    else
      Vel.Set(0,0);  //We're basically undefined over an empty time period anyhow
  }
  
  //returns a copy of the Position vector
  public Vector2D GetPosition()
  {
    return new Vector2D(Pos);
  }
  
  //Returns a copy of the current Velocity Vector
  public Vector2D GetVelocity()
  {
    return new Vector2D(Vel);
  }
}