Update readme

README.md

@@ -80,8 +80,10 @@ You can find the old textures and sounds by going back to previous commits in Gi
 - [x] Remove fuel crafting recipes for stars and upgrades
 - [x] Add ProjectE armor textures
 - [x] Add EMC Link
-- [ ] ~~Add Divining Rods~~
-- [ ] Add Alchemical Books
+- [x] Add Alchemical Books
+- [ ] Add more matter/fuel types
+- [ ] Make collectors less expensive and less effective (gold instead of glowstone)
+- [ ] Make collectors use ProjectExpansion's textures
 - [ ] Add Knowledge Sharing Book
     - [ ] Add function for getting player's learned items
 - [ ] Add Evertide Amulet
@@ -92,18 +94,13 @@ You can find the old textures and sounds by going back to previous commits in Gi
 - [ ] Add Void Ring
 - [x] Add DM Pedestal
 - [ ] Add Pedestal abilities
-    - [ ] Passive Stones
-        - [x] Soul
-        - [x] Body
-        - [x] Life
-        - [ ] Mind
-    - [ ] Talisman
+    - [x] Passive Stones
+    - [x] Talisman
     - [ ] Evertide
     - [ ] Volcanite
     - [ ] Zero
     - [ ] Ignition
     - [ ] Black Hole/Void
-    - [ ] Functions for passive stones, talisman, evertide/volcanite, zero/ignition
 
 ## Changelog
 <details><summary>Look at this fancy expanding changelog</summary>
@@ -111,13 +108,15 @@ You can find the old textures and sounds by going back to previous commits in Gi
 ### v8.0
 * New Features:
     * Added the EMC Link to replace both the Constructor and Deconstructor.
+    * Added the Dark Matter Pedestal.
+    * Added Alchemical Books.
 * Changes:
-    * The Constructor and Deconstructor are now deprecated. Element Exchange is no more.
+    * The Constructor and Deconstructor are now deprecated, replaced with the EMC Link.
     * Upgrades and Stars can no longer be used as fuel.
     * Dark and Red Matter Armor now uses ProjectE's textures
-    * Removed the ability to right click with stars to see the charge (made it more convenient to add the EMC Link)
+    * Removed the ability to right click with stars to see the charge (it's unnecessary).
 * Bugfixes:
-    * Dark and Red Matter Armor display properly (and identically) in both games.
+    * Dark and Red Matter Armor display properly (and identically) in both games, with ProjectE's textures.
     * `add_star_emc` now correctly works with negative energy values.
 
 
@@ -475,27 +474,33 @@ I didn't get to everything I wanted to, mostly because the automatic energy valu
 </details>
 
 ### Features that I might add eventually:
-* ProjectE's armor textures (maybe MCL only)\*
+* ProjectE's armor textures\*\*
 * Archangel's Smite (MCL only, arrows will not track targets)
 * Ring of Ignition\*
 * Zero Ring\*
 * Swiftwolf's Rending Gale (maybe not, if so, without the force field; basically Why's Flying Sausage with a different texture and maybe lightning in MCL)
 * Harvest Band (maybe not)
 * Ring of Arcana (possibly without the Harvest Band)
-* Gem Armor
+* Gem Armor (only if the engine bug with armor is fixed)
 * Destruction Catalyst
 * Hyperkinetic Lens?
-* Divining Rods\*
-* Alchemical Books\*
+* Alchemical Books\*\*
 * Catalytic Lens
 * Mercurial Eye
 * Evertide Amulet (but without being able to stand on water)\*
 * Volcanite Amulet (but without being able to stand on lava)\*
-* Pedestals\*
+* Pedestals\*\* (haven't added all the abilities yet)
 * Black Hole Band and Void Ring\*
 * Nova Catalyst/Cataclysm?
 * Knowledge Sharing Book\*
-* Energy Condensers\*
-* EMC Link\*
+* EMC Link\*\*
 
-\* Planned for v8.0
+\* Planned for v8.0
+
+\*\* Added to v8.0
+
+### Features that I will not add:
+* Divining Rods (I would have to manually add energy values for ores, and I'm not going to do that)
+* Energy Condensers (what's the point?)
+* Watch of Flowing Time (impossible/laggy)
+* Any item from ProjectE(xpansion) with an EMC value of over 1 trillion (impossible)

exchangeclone/alchemical_books.lua

@@ -0,0 +1,366 @@
+-- There's a lot of duplicated code in this file, but removing it means adding more duplicated code... so I'm just going to leave it.
+
+local function extract_dimension(pos)
+    if exchangeclone.mtg then
+        if minetest.get_modpath("nether") then
+            if pos.y >= nether.DEPTH_FLOOR and pos.y <= nether.DEPTH_CEILING then
+                return "Nether", pos
+            else
+                return "Overworld", pos
+            end
+        end
+        return nil, pos
+    end
+
+    -- overworld
+    if (pos.y >= mcl_vars.mg_overworld_min) and (pos.y <= mcl_vars.mg_overworld_max) then
+        return "Overworld", pos
+    end
+
+    -- nether
+    if (pos.y >= mcl_vars.mg_nether_min) and (pos.y <= mcl_vars.mg_nether_max) then
+        local report_y = pos.y - mcl_vars.mg_nether_min
+        return "Nether", {x = pos.x, y = report_y, z = pos.z}
+    end
+
+    -- end
+    if (pos.y >= mcl_vars.mg_end_min) and (pos.y <= mcl_vars.mg_end_max) then
+        local report_y = pos.y - mcl_vars.mg_end_min
+        return "End", {x = pos.x, y = report_y, z = pos.z}
+    end
+
+    -- outside of scoped bounds.
+    return "Void", pos
+end
+
+local function add_dimension(dimension, pos)
+    dimension = dimension:lower()
+    if exchangeclone.mtg then
+        return pos
+    end
+
+    if dimension == "nether" then
+        local report_y = pos.y + mcl_vars.mg_nether_min
+        return {x = pos.x, y = report_y, z = pos.z}
+    end
+
+    if dimension == "end" then
+        local report_y = pos.y + mcl_vars.mg_end_min
+        return {x = pos.x, y = report_y, z = pos.z}
+    end
+
+    return pos
+end
+
+local base_formspec = {
+    "formspec_version[3]",
+    "size[13,10]",
+    "button[11.5,0.5;1,0.7;add;Add]",
+    "button[8.5,1.5;4,1;teleport;Teleport]",
+    "button[8.5,2.75;4,1;rename;Rename]",
+    "button[8.5,4;4,1;up;Move Up]",
+    "button[8.5,5.25;4,1;down;Move Down]",
+    "button[8.5,6.5;4,1;delete;Delete]",
+    "field_close_on_enter[name;false]",
+    "field_enter_after_edit[name;false]"
+}
+
+local context = {}
+
+-- player: The player to be shown the formspec
+-- index: The index of the location the player is currently selecting
+-- use_stack_data: Whether to use locations stored with the book or the player.
+local function show_formspec(player, index, text, use_stack_data, confirmation)
+    local stack = player:get_wielded_item()
+    if minetest.get_item_group(stack:get_name(), "exchangeclone_alchemical_book") < 1 then
+        return
+    end
+    context[player:get_player_name()] = context[player:get_player_name()] or {}
+    context[player:get_player_name()].using_stack_data = use_stack_data
+    local book_data = stack:get_definition().alchemical_book_data
+    local data = minetest.deserialize((use_stack_data and stack or player):get_meta():get_string("exchangeclone_alchemical_book"))
+    local formspec = table.copy(base_formspec)
+    formspec[#formspec+1] = "field[8.5,0.5;3,0.7;name;;"..minetest.formspec_escape(text or "").."]"
+    local player_pos = player:get_pos()
+    if type(data) ~= "table" then
+        data = {}
+    end
+    if not data.locations then
+        data.locations = {}
+    end
+    if #data.locations > 0 then
+        formspec[#formspec+1] = "textlist[0.5,0.5;7,7;location_list;"
+        for _, location in ipairs(data.locations) do
+            formspec[#formspec+1] = minetest.formspec_escape(location.name)..","
+        end
+        if index then
+            formspec[#formspec+1] = ";"..index
+        end
+        formspec[#formspec+1] = "]"
+    end
+    if index then
+        local selected = data.locations[index]
+        if selected then
+            local dimension, adjusted_pos = extract_dimension(selected.pos)
+            local player_dimension, player_adjusted_pos = extract_dimension(player_pos)
+            local dimension_string = dimension and (" ("..dimension..")") or ""
+            local distance = vector.distance(adjusted_pos, player_adjusted_pos)
+            local cost = math.floor(book_data.emc_per_node*distance*20)/20
+            local info = minetest.formspec_escape(string.format(
+                "%s\nPosition: %.1f, %.1f, %.1f%s\nDistance: %.1f\nCost: %s EMC",
+                 selected.name,
+                 adjusted_pos.x,
+                 adjusted_pos.y,
+                 adjusted_pos.z,
+                 dimension_string,
+                 distance,
+                 exchangeclone.format_number(cost)
+            ))
+            if player_dimension ~= dimension then
+                if book_data.dimension_lock then
+                    info = info.."\nCannot teleport between dimensions."
+                end
+            end
+            formspec[#formspec+1] = "textarea[0.5,8;7,1.75;;;"..info.."]"
+        end
+    end
+    if confirmation then
+        formspec[#formspec+1] = "label[8.5,8;Delete?]button[10,8;1.25,1;cancel;Cancel]button[11.25,8;1.25,1;confirm;Delete]"
+    end
+    minetest.show_formspec(player:get_player_name(), "exchangeclone_alchemical_book", table.concat(formspec))
+end
+
+minetest.register_on_joinplayer(function(player)
+    context[player:get_player_name()] = nil
+end)
+
+minetest.register_on_leaveplayer(function(player)
+    context[player:get_player_name()] = nil
+end)
+
+minetest.register_on_player_receive_fields(function(player, formname, fields)
+    if formname ~= "exchangeclone_alchemical_book" then return end
+    if fields.quit then
+        context[player:get_player_name()] = nil
+        return
+    end
+    local use_stack_data = context[player:get_player_name()].using_stack_data
+    local stack = player:get_wielded_item()
+    if minetest.get_item_group(stack:get_name(), "exchangeclone_alchemical_book") < 1 then
+        return
+    end
+    local meta = (use_stack_data and stack or player):get_meta()
+    local data = minetest.deserialize(meta:get_string("exchangeclone_alchemical_book"))
+    if not data then data = {} end
+    if not data.locations then data.locations = {} end
+    local index = context[player:get_player_name()].index
+    local book_data = stack:get_definition().alchemical_book_data
+    if type(data) ~= "table" then
+        data = {}
+    end
+    if not data.locations then
+        data.locations = {}
+    end
+    if fields.key_enter_field == "name" or fields.add or fields.rename then
+        local name = fields.name:trim()
+        if name == "" then return end
+        for _, location in pairs(data.locations) do
+            if location.name == name then
+                minetest.chat_send_player(player:get_player_name(), "There is already a location called '"..location.name.."'")
+                return
+            end
+        end
+        if fields.rename then
+            data.locations[index].name = name
+        else
+            data.locations[#data.locations+1] = {name = name, pos = player:get_pos()}
+        end
+        meta:set_string("exchangeclone_alchemical_book", minetest.serialize(data))
+        if use_stack_data then player:set_wielded_item(stack) end
+        show_formspec(player, index, "", use_stack_data)
+    elseif fields.teleport then
+        if not data.locations[index] then return end
+        local pos = data.locations[index].pos
+        local dimension, adjusted_pos = extract_dimension(pos)
+        local player_dimension, adjusted_player_pos = extract_dimension(player:get_pos())
+        if dimension ~= player_dimension then
+            if book_data.dimension_lock then
+                minetest.chat_send_player(player:get_player_name(), "This Alchemical Book is not powerful enough to teleport between dimensions.")
+                show_formspec(player, index, fields.name, use_stack_data)
+                return
+            end
+        end
+        local distance = vector.distance(adjusted_player_pos, adjusted_pos)
+        local emc_per_node = stack:get_definition().alchemical_book_data.emc_per_node
+        local cost = distance*emc_per_node
+        local player_emc = exchangeclone.get_player_emc(player)
+        if player_emc < cost then
+            minetest.chat_send_player(player:get_player_name(), "Not enough EMC to teleport.")
+        else
+            player:set_pos(pos)
+            exchangeclone.add_player_emc(-cost)
+        end
+        show_formspec(player, index, fields.name, use_stack_data)
+    elseif fields.location_list then
+        local exploded = minetest.explode_textlist_event(fields.location_list)
+        index = math.min(exploded.index, #data.locations)
+        if not context[player:get_player_name()] then context[player:get_player_name()] = {} end
+        context[player:get_player_name()].index = index
+        if exploded.type == "DCL" then
+            local pos = data.locations[index].pos
+            local dimension, adjusted_pos = extract_dimension(pos)
+            local player_dimension, adjusted_player_pos = extract_dimension(player:get_pos())
+            if dimension ~= player_dimension then
+                if book_data.dimension_lock then
+                    minetest.chat_send_player(player:get_player_name(), "This Alchemical Book is not powerful enough to teleport between dimensions.")
+                    show_formspec(player, index, fields.name, use_stack_data)
+                    return
+                end
+            end
+            local distance = vector.distance(adjusted_player_pos, adjusted_pos)
+            local emc_per_node = stack:get_definition().alchemical_book_data.emc_per_node
+            local cost = distance*emc_per_node
+            local player_emc = exchangeclone.get_player_emc(player)
+            if player_emc < cost then
+                minetest.chat_send_player(player:get_player_name(), "Not enough EMC to teleport.")
+            else
+                player:set_pos(pos)
+                exchangeclone.add_player_emc(-cost)
+            end
+        end
+        show_formspec(player, index, fields.name, use_stack_data)
+    elseif fields.up then
+        if not data.locations[index] then return end
+        if index > 1 then
+            data.locations[index], data.locations[index-1] = data.locations[index-1], data.locations[index]
+            meta:set_string("exchangeclone_alchemical_book", minetest.serialize(data))
+            if use_stack_data then player:set_wielded_item(stack) end
+            index = index - 1
+            if not context[player:get_player_name()] then context[player:get_player_name()] = {} end
+            context[player:get_player_name()].index = index
+            show_formspec(player, index, fields.name, use_stack_data)
+        end
+    elseif fields.down then
+        if not data.locations[index] then return end
+        if index < #data.locations then
+            data.locations[index], data.locations[index+1] = data.locations[index+1], data.locations[index]
+            meta:set_string("exchangeclone_alchemical_book", minetest.serialize(data))
+            if use_stack_data then player:set_wielded_item(stack) end
+            index = index + 1
+            if not context[player:get_player_name()] then context[player:get_player_name()] = {} end
+            context[player:get_player_name()].index = index
+            show_formspec(player, index, fields.name, use_stack_data)
+        end
+    elseif fields.delete then
+        if not data.locations[index] then return end
+        show_formspec(player, index, fields.name, use_stack_data, true)
+    elseif fields.cancel then
+        if not data.locations[index] then return end
+        show_formspec(player, index, fields.name, use_stack_data)
+    elseif fields.confirm then
+        if not data.locations[index] then return end
+        for i = index,#data.locations - 1 do
+            data.locations[i] = data.locations[i+1]
+        end
+        data.locations[#data.locations] = nil
+        index = math.min(index, #data.locations)
+        if not context[player:get_player_name()] then context[player:get_player_name()] = {} end
+        context[player:get_player_name()].index = index
+        meta:set_string("exchangeclone_alchemical_book", minetest.serialize(data))
+        if use_stack_data then player:set_wielded_item(stack) end
+        show_formspec(player, index, fields.name, use_stack_data)
+    end
+end)
+
+local function alchemical_book_function(itemstack, player, pointed_thing)
+    local use_stack_data = itemstack:get_meta():get_int("exchangeclone_use_stack_data")
+    if use_stack_data == 0 then
+        use_stack_data = nil
+    end
+    if player:get_player_control().sneak then
+        if use_stack_data then
+            minetest.chat_send_player(player:get_player_name(), "Using player data")
+            itemstack:get_meta():set_int("exchangeclone_use_stack_data", 0)
+        else
+            minetest.chat_send_player(player:get_player_name(), "Using book data")
+            itemstack:get_meta():set_int("exchangeclone_use_stack_data", 1)
+        end
+        return itemstack
+    else
+        show_formspec(player, nil, "", use_stack_data)
+    end
+end
+
+minetest.register_tool("exchangeclone:basic_alchemical_book", {
+    description = "Basic Alchemical Book\n1000 EMC/node\nCannot travel between dimensions",
+    inventory_image = "exchangeclone_basic_alchemical_book.png",
+    groups = {exchangeclone_alchemical_book = 1},
+    alchemical_book_data = {emc_per_node = 1000, dimension_lock = true},
+    on_secondary_use = alchemical_book_function,
+    on_place = alchemical_book_function
+})
+
+minetest.register_tool("exchangeclone:advanced_alchemical_book", {
+    description = "Advanced Alchemical Book\n500 EMC/node",
+    inventory_image = "exchangeclone_advanced_alchemical_book.png",
+    groups = {exchangeclone_alchemical_book = 1},
+    alchemical_book_data = {emc_per_node = 500},
+    on_secondary_use = alchemical_book_function,
+    on_place = alchemical_book_function
+})
+
+minetest.register_tool("exchangeclone:master_alchemical_book", {
+    description = "Master Alchemical Book\n100 EMC/node.",
+    inventory_image = "exchangeclone_master_alchemical_book.png",
+    groups = {exchangeclone_alchemical_book = 1},
+    alchemical_book_data = {emc_per_node = 100},
+    on_secondary_use = alchemical_book_function,
+    on_place = alchemical_book_function
+})
+
+minetest.register_tool("exchangeclone:arcane_alchemical_book", {
+    description = "Arcane Alchemical Book\n0 EMC/node",
+    inventory_image = "exchangeclone_arcane_alchemical_book.png",
+    groups = {exchangeclone_alchemical_book = 1},
+    alchemical_book_data = {emc_per_node = 0},
+    on_secondary_use = alchemical_book_function,
+    on_place = alchemical_book_function
+})
+
+local craftitem = exchangeclone.mcl and "mcl_throwing:ender_pearl" or "default:mese_crystal"
+
+minetest.register_craft({
+    output = "exchangeclone:basic_alchemical_book",
+    recipe = {
+        {"exchangeclone:low_covalence_dust","exchangeclone:red_matter", "exchangeclone:low_covalence_dust"},
+        {craftitem, exchangeclone.itemstrings.book, "exchangeclone:philosophers_stone"},
+        {"exchangeclone:low_covalence_dust","exchangeclone:red_matter", "exchangeclone:low_covalence_dust"},
+    }
+})
+
+minetest.register_craft({
+    output = "exchangeclone:advanced_alchemical_book",
+    recipe = {
+        {"exchangeclone:medium_covalence_dust","exchangeclone:pink_matter", "exchangeclone:medium_covalence_dust"},
+        {craftitem, "exchangeclone:basic_alchemical_book", "exchangeclone:pink_matter"},
+        {"exchangeclone:medium_covalence_dust","exchangeclone:pink_matter", "exchangeclone:medium_covalence_dust"},
+    }
+})
+
+minetest.register_craft({
+    output = "exchangeclone:master_alchemical_book",
+    recipe = {
+        {"exchangeclone:high_covalence_dust","exchangeclone:violet_matter", "exchangeclone:high_covalence_dust"},
+        {"exchangeclone:violet_matter", "exchangeclone:advanced_alchemical_book", "exchangeclone:violet_matter"},
+        {"exchangeclone:high_covalence_dust","exchangeclone:violet_matter", "exchangeclone:high_covalence_dust"},
+    }
+})
+
+minetest.register_craft({
+    output = "exchangeclone:arcane_alchemical_book",
+    recipe = {
+        {"exchangeclone:void_ring","exchangeclone:block_cyan_matter", "exchangeclone:void_ring"},
+        {"exchangeclone:void_ring", "exchangeclone:master_alchemical_book", "exchangeclone:void_ring"},
+        {"exchangeclone:void_ring","exchangeclone:block_cyan_matter", "exchangeclone:void_ring"},
+    }
+})

exchangeclone/init.lua

@@ -131,6 +131,7 @@ local files = {
 	"talisman_of_repair",
 	"passive_stones",
 	"emc_link",
+	"alchemical_books",
 	"dark_matter_pedestal",
 }
 

exchangeclone/passive_stones.lua

@@ -43,8 +43,10 @@ minetest.register_tool("exchangeclone:soul_stone", {
         exclude = {"exchangeclone:life_stone"}
     },
     _exchangeclone_pedestal = function(pos)
-        for _, player in minetest.get_objects_inside_radius(pos, 5) do
-            heal(player, 2)
+        for _, object in pairs(minetest.get_objects_inside_radius(pos, 5)) do
+            if object:is_player() then
+                heal(object, 2)
+            end
         end
     end,
     on_secondary_use = exchangeclone.toggle_active,
@@ -79,7 +81,7 @@ if (exchangeclone.mcl and mcl_hunger.active) or (exchangeclone.mtg and minetest.
         _exchangeclone_pedestal = function(pos)
             for _, object in pairs(minetest.get_objects_inside_radius(pos, 5)) do
                 if object:is_player() then
-                    heal(object, 2)
+                    satiate(object, 2)
                 end
             end
         end,
@@ -174,12 +176,12 @@ if exchangeclone.mcl then
             mcl_experience.set_xp(player, player_xp - amount_to_take)
             stored = stored + amount_to_take
             meta:set_int("exchangeclone_stored_xp", stored)
-            meta:set_string("description", get_mind_description(itemstack))
             if stored > 0 then
                 meta:set_string("exchangeclone_emc_value", "none")
             else
                 meta:set_string("exchangeclone_emc_value", "")
             end
+            meta:set_string("description", get_mind_description(itemstack))
             return itemstack
         else
             local player_xp = mcl_experience.get_xp(player)
@@ -208,10 +210,28 @@ if exchangeclone.mcl then
         on_secondary_use = mind_action,
         on_place = mind_action,
         groups = {exchangeclone_passive = 1, disable_repair = 1},
-        _mcl_generate_description = get_mind_description
+        _mcl_generate_description = get_mind_description,
+        _exchangeclone_pedestal = function(pos, itemstack)
+            local meta = itemstack:get_meta()
+            for _, object in pairs(minetest.get_objects_inside_radius(pos, 5)) do
+                local lua_entity = object:get_luaentity()
+                if lua_entity and lua_entity.name == "mcl_experience:orb" then
+                    local amount = lua_entity._xp
+                    meta:set_int("exchangeclone_stored_xp", meta:get_int("exchangeclone_stored_xp") + amount)
+                    if meta:get_int("exchangeclone_stored_xp") > 0 then
+                        meta:set_string("exchangeclone_emc_value", "none")
+                    else
+                        meta:set_string("exchangeclone_emc_value", "")
+                    end
+                    meta:set_string("description", get_mind_description(itemstack))
+                    object:remove()
+                end
+            end
+            return itemstack
+        end,
     })
 
-    local book = "mcl_books:book"
+    local book = exchangeclone.itemstrings.book
     minetest.register_craft({
         output = "exchangeclone:mind_stone",
         recipe = {

exchangeclone/talisman_of_repair.lua

@@ -42,23 +42,32 @@ local function repair_items(inv, listname)
     end
 end
 
+local function repair_player_inv(player)
+    local inv = player:get_inventory()
+    repair_items(inv, "main")
+    if exchangeclone.mcl then
+        repair_items(inv, "offhand")
+        repair_items(inv, "armor")
+    elseif minetest.get_modpath("3d_armor") then
+        local _, armor_inv = armor:get_valid_player(player, "3d_armor")
+        repair_items(armor_inv, "armor")
+    end
+end
+
 minetest.register_tool("exchangeclone:talisman_of_repair", {
     description = "Talisman of Repair",
     inventory_image = "exchangeclone_talisman_of_repair.png",
     _exchangeclone_passive = {
-        func = function(player)
-            local inv = player:get_inventory()
-            repair_items(inv, "main")
-            if exchangeclone.mcl then
-                repair_items(inv, "offhand")
-                repair_items(inv, "armor")
-            elseif minetest.get_modpath("3d_armor") then
-                local _, armor_inv = armor:get_valid_player(player, "3d_armor")
-                repair_items(armor_inv, "armor")
-            end
-        end,
+        func = repair_player_inv,
         always_active = true
     },
+    _exchangeclone_pedestal = function(pos)
+        for _, object in pairs(minetest.get_objects_inside_radius(pos, 5)) do
+            if object:is_player() then
+                repair_player_inv(object)
+            end
+        end
+    end,
     groups = {exchangeclone_passive = 1, disable_repair = 1}
 })
 

exchangeclone/transmutation_table.lua

@@ -108,7 +108,7 @@ local function add_to_output(player, amount, show)
         local max_amount = math.min(amount, stack_max, math.floor(player_emc/emc_value))
         local inventory = minetest.get_inventory({type = "detached", name = "exchangeclone_transmutation_"..player:get_player_name()})
         local added_amount = max_amount - inventory:add_item("output", ItemStack(item.." "..max_amount)):get_count()
-        exchangeclone.set_player_emc(player, math.min(player_emc, player_emc - (emc_value * added_amount))) -- not sure if "math.min()" is necessary
+        exchangeclone.add_player_emc(player, math.min(player_emc, -(emc_value * added_amount))) -- not sure if "math.min()" is necessary
         if show then exchangeclone.show_transmutation_table_formspec(player) end
     end
 end
@@ -379,23 +379,14 @@ minetest.register_tool("exchangeclone:tome_of_knowledge", {
     groups = {disable_repair = 1, fire_immune = 1}
 })
 
-minetest.register_alias("exchangeclone:tome_of_knowledge", "exchangeclone:tome_of_knowledge")
-
-local book = "default:book"
-local obsidian = "default:obsidian"
-local stone = "default:stone"
-if exchangeclone.mcl then
-    book = "mcl_books:book"
-    obsidian = "mcl_core:obsidian"
-    stone = "mcl_core:stone"
-end
+minetest.register_alias("exchangeclone:alchemical_tome", "exchangeclone:tome_of_knowledge")
 
 minetest.register_craft({
     output = "exchangeclone:transmutation_table",
     recipe = {
-        {obsidian, stone, obsidian},
-        {stone, "exchangeclone:philosophers_stone", stone},
-        {obsidian, stone, obsidian}
+        {exchangeclone.itemstrings.obsidian, exchangeclone.itemstrings.stone, exchangeclone.itemstrings.obsidian},
+        {exchangeclone.itemstrings.stone, "exchangeclone:philosophers_stone", exchangeclone.itemstrings.stone},
+        {exchangeclone.itemstrings.obsidian, exchangeclone.itemstrings.stone, exchangeclone.itemstrings.obsidian}
     },
     replacements = {{"exchangeclone:philosophers_stone", "exchangeclone:philosophers_stone"}}
 })
@@ -403,9 +394,9 @@ minetest.register_craft({
 minetest.register_craft({
     output = "exchangeclone:transmutation_tablet",
     recipe = {
-        {"exchangeclone:dark_matter_block", stone, "exchangeclone:dark_matter_block"},
-        {stone, "exchangeclone:transmutation_table", stone},
-        {"exchangeclone:dark_matter_block", stone, "exchangeclone:dark_matter_block"}
+        {"exchangeclone:dark_matter_block", exchangeclone.itemstrings.stone, "exchangeclone:dark_matter_block"},
+        {exchangeclone.itemstrings.stone, "exchangeclone:transmutation_table", exchangeclone.itemstrings.stone},
+        {"exchangeclone:dark_matter_block", exchangeclone.itemstrings.stone, "exchangeclone:dark_matter_block"}
     },
 })
 
@@ -413,7 +404,7 @@ if minetest.settings:get_bool("exchangeclone.allow_crafting_alchemical_tome", fa
     minetest.register_craft({
         output = "exchangeclone:tome_of_knowledge",
         recipe = {
-            {"", book, ""},
+            {"", exchangeclone.itemstrings.book, ""},
             {"exchangeclone:klein_star_omega", "exchangeclone:philosophers_stone", "exchangeclone:klein_star_omega"},
             {"", "exchangeclone:red_matter", ""}
         },

zzzz_exchangeclone_init/lib.lua

@@ -344,6 +344,7 @@ end
 -- Itemstrings for various items used in crafting recipes.
 exchangeclone.itemstrings = {
     cobble =            exchangeclone.mcl and "mcl_core:cobble"             or "default:cobble",
+    stone =             exchangeclone.mcl and "mcl_core:stone"              or "default:stone",
     redstoneworth =     exchangeclone.mcl and "mesecons:redstone"           or "default:obsidian",
     obsidian =          exchangeclone.mcl and "mcl_core:obsidian"           or "default:obsidian",
     glowstoneworth =    exchangeclone.mcl and "mcl_nether:glowstone_dust"   or "default:tin_ingot",
@@ -358,7 +359,8 @@ exchangeclone.itemstrings = {
     dirt =              exchangeclone.mcl and "mcl_core:dirt"               or "default:dirt",
     clay =              exchangeclone.mcl and "mcl_core:clay"               or "default:clay",
     sand =              exchangeclone.mcl and "mcl_core:sand"               or "default:sand",
-    torch =             exchangeclone.mcl and "mcl_torches:torch"           or "default:torch"
+    torch =             exchangeclone.mcl and "mcl_torches:torch"           or "default:torch",
+    book =              exchangeclone.mcl and "mcl_books:book"              or "default:book"
 }
 
 exchangeclone.emc_aliases = {}