Ejemplo n.º 1
0
            public bool MoveNext()
            {
                if (_copy.IsEmpty())
                {
                    return(false);
                }

                Current = _copy.DelMin();
                return(Current != null);
            }
        /// <summary>
        /// Simulates the system of particles for the specified amount of time.
        /// </summary>
        /// <param name="limit">the amount of time</param>
        public IEnumerator Simulate(double limit, double hz)
        {
            Start(limit);

            while (!_pq.IsEmpty())
            {
                // get impending event, discard if invalidated
                Event e = _pq.DelMin();
                if (!e.IsValid())
                {
                    continue;
                }
                Particle a = e.A;
                Particle b = e.B;

                // physical collision, so update positions, and then simulation clock
                for (int i = 0; i < _particles.Length; i++)
                {
                    _particles[i].Move(e.Time - _t);
                }
                _t = e.Time;

                // process event
                if (a != null && b != null)
                {
                    a.BounceOff(b); // particle-particle collision
                }
                else if (a != null && b == null)
                {
                    a.BounceOffVerticalWall(); // particle-wall collision
                }
                else if (a == null && b != null)
                {
                    b.BounceOffHorizontalWall(); // particle-wall collision
                }
                else if (a == null && b == null)
                {
                    yield return(sWaitForSeconds);

                    Redraw(limit, hz); // redraw event
                }

                // update the priority queue with new collisions involving a or b
                Predict(a, limit);
                Predict(b, limit);
            }
        }