//------------------------------------------------------------
public void ToMake(Graphics g)
{
this.stick.ToMake(g);
this.eLine.ToMake(g);
for (int i = 0; i < this._ballsOnTable.Count; i++)
{
Balls a = this._ballsOnTable[i];
a.ToMake(g);
for (int j = i + 1; j < this._ballsOnTable.Count; j++)
{
Balls b = this._ballsOnTable[j];
this.Clash(a, b);
}
}
}
//------------------------------------------------------------
private void Clash(Balls b1, Balls b2) // we copied pasted this part
{
float xDifferece = b1.X - b2.X;
float yDifferece = b1.Y - b2.Y;
float hypotenuse = Convert.ToSingle(Math.Pow(xDifferece, 2) + Math.Pow(yDifferece, 2));
if (Math.Sqrt(hypotenuse) <= (b1.Radius + b2.Radius + b2.Radius))
{
if (b2 is Pockets || b1 is Pockets)
{
Debug.WriteLine("ball is in the hole.");
b2.Vx = 0;
b2.Vy = 0;
b1.Vx = 0;
b1.Vy = 0;
if (b2 is Pockets)
{
if (b1 is WhiteBall)
{
b1.ResetPosition();
}
else
{
_ballsOnTable.Remove(b1);
}
}
else
{
if (b2 is WhiteBall)
{
b2.ResetPosition();
}
else
{
_ballsOnTable.Remove(b2);
}
}
}
else
{
float Vx = b2.Vx - b1.Vx;
float Vy = b2.Vy - b1.Vy;
float dotProduct = xDifferece * Vx + yDifferece * Vy;
if (dotProduct > 0)
{
float collisionScale = dotProduct / hypotenuse;
float xCollision = (xDifferece * collisionScale);
float yCollision = (yDifferece * collisionScale);
float combinedMass = b1.Mass + b2.Mass;
float collisionWeightA = 2 * b2.Mass / combinedMass;
float collisionWeightB = 2 * b1.Mass / combinedMass;
b1.Vx += collisionWeightA * xCollision;
b1.Vy += collisionWeightA * yCollision;
b2.Vx -= collisionWeightB * xCollision;
b2.Vy -= collisionWeightB * yCollision;
}
}
}
}
//------------------------------------------------------------
public void AddBall(Balls b)
{
this._ballsOnTable.Add(b);
}
