ceiling clinging crystals in caves and swapping wand focus

crystals.lua

@@ -146,6 +146,7 @@ function magicalities.register_crystal(element, description, color)
 		use_texture_alpha = true,
 		mesh = "crystal.obj",
 		paramtype = "light",
+		paramtype2 = "wallmounted",
 		drawtype = "mesh",
 		light_source = 4,
 		_element = element,
@@ -206,16 +207,19 @@ function magicalities.register_crystal(element, description, color)
 		sounds = default.node_sound_glass_defaults(),
 	})
 
-	-- Crystal clusters as ores
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "magicalities:crystal_cluster_"..element,
-		wherein        = "default:stone",
-		clust_scarcity = 19 * 19 * 19,
-		clust_num_ores = 1,
-		clust_size     = 1,
-		y_max          = -30,
-		y_min          = -31000,
+	-- Register cave crystal appearances
+	minetest.register_decoration({
+		deco_type = "simple",
+		place_on  = "default:stone",
+		sidelen   = 16,
+
+		y_max = -30,
+		y_min = -31000,
+		flags = "all_floors, all_ceilings",
+
+		fill_ratio = 0.0008,
+
+		decoration = "magicalities:crystal_cluster_"..element,
 	})
 
 	minetest.register_craft({
@@ -278,3 +282,17 @@ minetest.register_abm({
 		end 
 	end
 })
+
+minetest.register_on_generated(function (minp, maxp)
+	local clusters = minetest.find_nodes_in_area(minp, maxp, "group:crystal_cluster")
+	for _, pos in pairs(clusters) do
+		local stone = minetest.find_node_near(pos, 1, "default:stone")
+		if stone then
+			local param2 = minetest.dir_to_wallmounted(vector.direction(pos, stone))
+
+			local node = minetest.get_node(pos)
+			node.param2 = param2
+			minetest.set_node(pos, node)
+		end
+	end
+end)

focuses.lua

@@ -39,3 +39,77 @@ minetest.register_craftitem("magicalities:focus_teleport", {
 		return itemstack
 	end
 })
+
+minetest.register_craftitem("magicalities:focus_swap", {
+	description = "Wand Focus of Swapping",
+	groups = {wand_focus = 1},
+	inventory_image = "magicalities_focus_swap.png",
+	stack_max = 1,
+	_wand_requirements = {
+		["earth"] = 1
+	},
+	_wand_use = function (itemstack, user, pointed_thing)
+		local meta = itemstack:get_meta()
+		local tnode = meta:get_string("swapnode")
+		local pname = user:get_player_name()
+		if tnode == "" or pointed_thing.type ~= "node" then return itemstack end
+
+		local pos = pointed_thing.under
+
+		if minetest.is_protected(pos, pname) then
+			return itemstack
+		end
+
+		local node = minetest.get_node_or_nil(pos)
+		if not node or node.name == tnode then
+			return itemstack
+		end
+
+		local place_node_itm = ItemStack(tnode)
+		local inv = user:get_inventory()
+
+		local ndef = minetest.registered_nodes[tnode]
+		if not inv:contains_item("main", place_node_itm) then
+			minetest.chat_send_player(pname, ("You don't have enough %s in your inventory."):format(ndef.description))
+			return itemstack
+		end
+
+		local drops = minetest.get_node_drops(pos)
+
+		if ndef.can_dig ~= nil and not ndef.can_dig(pos, user) then
+			return itemstack
+		end
+
+		minetest.remove_node(pos)
+
+		itemstack = magicalities.wands.wand_take_contents(itemstack, {earth = 1})
+		magicalities.wands.update_wand_desc(itemstack)
+
+		inv:remove_item("main", place_node_itm)
+
+		for _, stk in pairs(drops) do
+			if inv:room_for_item("main", stk) then
+				inv:add_item("main", stk)
+			else
+				minetest.item_drop(ItemStack(stk), user, vector.add(pos, {x=0,y=1,z=0}))
+			end
+		end
+
+		minetest.place_node(pos, {name = tnode})
+
+		return itemstack
+	end,
+	_wand_node = function (pos, node, placer, itemstack, pointed_thing)
+		if not node or node.name == "air" or node.name == "ignore" then return itemstack end
+		local meta = itemstack:get_meta()
+		local tnode = meta:get_string("swapnode")
+
+		if tnode == node.name then return itemstack end
+		meta:set_string("swapnode", node.name)
+
+		local ndef = minetest.registered_nodes[node.name]
+		minetest.chat_send_player(placer:get_player_name(), "Selected replacement node " .. ndef.description)
+
+		return itemstack
+	end
+})

table.lua

@@ -3,10 +3,10 @@ magicalities.arcane = {}
 magicalities.arcane.recipes = {}
 
 local fmspecelems = {
-	["earth"] = {3, 0.15},
+	["earth"] = {2.98, 0.15},
 	["water"] = {1, 1},
 	["air"]   = {5, 1},
-	["fire"]  = {3, 4.85},
+	["fire"]  = {2.98, 4.85},
 	["light"] = {1, 4},
 	["dark"]  = {5, 4}
 }