Add seagrass on clay

mods/ITEMS/mcl_ocean/seagrass.lua

@@ -1,5 +1,11 @@
 local S = minetest.get_translator("mcl_ocean")
 
+-- List of supported surfaces for seagrass
+local surfaces = {
+	{ "dirt", "mcl_core:dirt" },
+	{ "clay", "mcl_core:clay" },
+}
+
 local function seagrass_on_place(itemstack, placer, pointed_thing)
 	if pointed_thing.type ~= "node" or not placer then
 		return itemstack
@@ -39,10 +45,13 @@ local function seagrass_on_place(itemstack, placer, pointed_thing)
 		return itemstack
 	end
 
-	if node_under.name ~= "mcl_core:dirt" then
+	if node_under.name == "mcl_core:dirt" then
+		node_under.name = "mcl_ocean:seagrass_dirt"
+	elseif node_under.name == "mcl_core:clay" then
+		node_under.name = "mcl_ocean:seagrass_clay"
+	else
 		return itemstack
 	end
-	node_under.name = "mcl_ocean:seagrass_dirt"
 	node_under.param2 = minetest.registered_items[itemstack:get_name()].place_param2 or 3
 	if node_under.param2 < 8 and math.random(1,2) == 1 then
 		-- Random horizontal displacement
@@ -56,22 +65,30 @@ local function seagrass_on_place(itemstack, placer, pointed_thing)
 	return itemstack
 end
 
--- Seagrass on dirt
+minetest.register_craftitem("mcl_ocean:seagrass", {
-
-minetest.register_node("mcl_ocean:seagrass_dirt", {
 	description = S("Seagrass"),
+	inventory_image = "mcl_ocean_seagrass.png^[verticalframe:12:0",
+	wield_image = "mcl_ocean_seagrass.png^[verticalframe:12:0",
+	on_place = seagrass_on_place,
+})
+
+-- Seagrass nodes: seagrass on a surface node
+
+for s=1, #surfaces do
+	local def = minetest.registered_nodes[surfaces[s][2]]
+	minetest.register_node("mcl_ocean:seagrass_"..surfaces[s][1], {
 		drawtype = "plantlike_rooted",
 		paramtype = "light",
 		paramtype2 = "meshoptions",
 		place_param2 = 3,
-	tiles = { "default_dirt.png" },
+		tiles = def.tiles,
 		special_tiles = {
 			{
 			image = "mcl_ocean_seagrass.png",
 			animation = {type="vertical_frames", aspect_w=16, aspect_h=16, length=1.0},
 			}
 		},
-	inventory_image = "mcl_ocean_seagrass.png^[verticalframe:12:0",
+		inventory_image = "("..def.tiles[1]..")^(mcl_ocean_seagrass.png^[verticalframe:12:0)",
 		wield_image = "mcl_ocean_seagrass.png^[verticalframe:12:0",
 		selection_box = {
 			type = "fixed",
@@ -82,17 +99,16 @@ minetest.register_node("mcl_ocean:seagrass_dirt", {
 		},
 		groups = { dig_immediate = 3, deco_block = 1, plant = 1, seagrass = 1, },
 		sounds = mcl_sounds.node_sound_leaves_defaults({footstep = mcl_sounds.node_sound_dirt_defaults().footstep}),
-	node_placement_prediction = "",
+		node_dig_prediction = surfaces[s][2],
-	node_dig_prediction = "mcl_core:dirt",
-	on_place = seagrass_on_place,
 		after_destruct = function(pos)
 			local node = minetest.get_node(pos)
 			if minetest.get_item_group(node.name, "seagrass") == 0 then
-			minetest.set_node(pos, {name="mcl_core:dirt"})
+				minetest.set_node(pos, {name=surfaces[s][2]})
 			end
 		end,
 		drop = "",
 		_mcl_shears_drop = true,
 		_mcl_hardness = 0,
 		_mcl_blast_resistance = 0,
-})
+	})
+end