improve near_nodes support

pl_seaweed/init.lua

@@ -111,18 +111,34 @@ pl_seaweed.grow_seaweed = function(pos)
 	minetest.swap_node(right_here, {name=node_name, param2=math.random(1,3)})
 end
 
-biome_lib.register_on_generate({
-		surface = {"default:water_source"},
-		max_count = seaweed_max_count,
-		rarity = seaweed_rarity,
-		min_elevation = 1,
-		max_elevation = 40,
-		near_nodes = {"default:dirt_with_grass"},
-		near_nodes_size = 4,
-		near_nodes_vertical = 1,
-		near_nodes_count = 1,
-		plantlife_limit = -0.9,
+pl.register_on_generate({
+        place_on = {
+            "default:water_source"
+        },
+		noise_params = {
+			scale = 0.00234375,
+			offset = 0,
+			seed = 0,
+			octaves = 3,
+			lacunarity = 2,
+			flags = "absvalue",
+			spread = {
+				x = 100,
+				y = 100,
+				z = 100
+			},
+			persist = 0.6
+		},
+		flags = "all_floors",
+		y_min = 1,
+		y_max = 40,
+		near_nodes = {
+            "default:dirt_with_grass"
+        },
+        near_nodes_size = 1
 	},
+	"pl_seaweed:water_grass",
+	nil,
 	pl_seaweed.grow_seaweed
 )