void Bullet::Update(float aTime)
{
  float DeltaX = 0;
  float DeltaY = 0;

  DeltaX = mSpeed * cos((double)mDegree);
  DeltaY = mSpeed * sin((double)mDegree);

  mPosX += (DeltaX * aTime)/2;
  mPosY += (DeltaY * aTime)/2;
}