AIA.Particle.UpdateVelocity C# (CSharp) Метод

        private void UpdateVelocity( GameTime p_gameTime )
        {
            float _xChange;
            float _yChange;

            float _fTime = p_gameTime.ElapsedGameTime.Milliseconds;

            _xChange = Acceleration.X * _fTime;
            _yChange = Acceleration.Y * _fTime;

            Velocity += new Vector2 ( _xChange, _yChange );

            Velocity *= 0.9f;
        }