示例#1
0
        public static void FloodFill(PlatformContext context, Point location, TilePlacement placement)
        {
            if (!FloodFillValid(context, location, placement))
            {
                return;
            }
            var queue = new Queue <Point>();
            var set   = new HashSet <Point>();

            queue.Enqueue(location);
            set.Add(location);
            while (queue.Any())
            {
                var point = queue.Dequeue();
                placement.Stamp(context, context.TileToWorld(point));
                foreach (var test in FloodFillTestPoints)
                {
                    var next = point + test;
                    if (!set.Contains(next) && FloodFillValid(context, next, placement))
                    {
                        queue.Enqueue(next);
                        set.Add(next);
                    }
                }
            }
        }
示例#2
0
        private static bool FloodFillValid(PlatformContext context, Point location, TilePlacement placement)
        {
            if (!context.IsInBounds(location))
            {
                return(false);
            }
            var cell = context.Map[location];

            switch (placement.Layer)
            {
            case TileStencil.Layer.Background:
                return(!cell.Background.Any());

            case TileStencil.Layer.Foreground:
                return(!cell.Foreground.Any());

            case TileStencil.Layer.Blocking:
                return(cell.Block == null);
            }
            return(true);
        }