OpenRA.Traits.Shroud.ResetExploration C# (CSharp) Method

        public void ResetExploration()
        {
            var changed = new List<PPos>();
            foreach (var puv in map.ProjectedCellBounds)
            {
                var uv = (MPos)puv;
                var visible = visibleCount[uv] > 0;
                if (explored[uv] != visible)
                {
                    explored[uv] = visible;
                    changed.Add(puv);
                }
            }

            Invalidate(changed);
        }