Add Lua API for mod interop

API.md

@@ -0,0 +1,101 @@
+# Dripstone API manual
+
+The dripstone behavior in this mod differs from games like Minecraft by adding
+more complexity in a context agnostic manner. This means that in comparison to
+a game like Minecraft:
+
+- This dripstone is **computationally very cheap**, as it doesn't care whether
+it's part of a stalactite, stalagmite or neither.
+- This dripstone grows in **more accurate shapes**, forming more complex shapes
+that occur in nature too.
+- This dripstone doesn't know whether it is part of a stalactite or stalagmite,
+so it **doesn't support falling stalactites**.
+
+![Dripstone demonstration showing various complex shapes](textures/dripstone_example.png)
+
+## Composition
+
+Dripstone has 4 dripstone types:
+
+- Dry dripstone, which is the default type.
+- Watered dripstone, which has absorbed water.
+- Molten dripstone, which has absorbed lava.
+- Hardened dripstone, which has absorbed water & lava at the same time.
+
+Dripstone has 8 different sizes:
+
+- A base dripstone block
+- 7  dripstone spike shapes that can grow in height and thickness.
+
+As you can see in the image below, shape sizes from smallest to largest are
+spike, tiny, small, medium, great, large, huge, and block.
+
+![Classification of all 32 dripstone nodes](textures/dripstone_classification.png)
+
+From left to right, the dripstone types are dry dripstone, watered dripstone,
+molten dripstone and hardened dripstone.
+
+## Dry dripstone
+
+Dry dripstone is the base dripstone type. All dripstone types mimick this type
+with a few minor changes.
+
+Dry dripstone blocks are the only type that can absorb liquids. When doing so,
+they become watered or molten dripstone blocks.
+
+## Watered & molten dripstone
+
+Dripstone that has absorbed water or lava, can use it for three things. Once it
+has done either of the three following options, the dripstone becomes dry.
+
+1. The dripstone can use it to grow 1 size. Only dripstone of size 6 (Large) and
+under can do this.
+2. The dripstone can pass the liquid down to a dripstone directly below it.
+Liquids can never be passed down to hardened dripstones.
+3. If the dripstone is a spike size, it can release the droplet downwards to the
+ground or to an object (such as a dripstone spike or a cauldron) that can catch
+the droplet. If there's no surface within 25 blocks, the droplet evaporates. If
+there's a surface that is unable to catch the droplet, a new spike will grow on
+top, effectively forming a new stalagmite.
+
+Since dripstone blocks are the only blocks that can absorb liquids, they
+function as a sprinkler that grows both the stalactite and stalagmite beneath
+it.
+
+**Note:** It is impossible to grow new dripstone blocks using dripstone blocks.
+As a result, you must either build your dripstone/lava/water farm in a cave, or
+you need to acquire silk touch to be able to break, move and place the dripstone
+blocks.
+
+## Hardened dripstone
+
+Similar to how unbreakable a block of obsidian is when lava & water mix,
+hardened dripstone is a tough, less breakable type of dripstone that occurs when
+a dripstone absorbs both watetr & lava before drying up.
+
+Hardened dripstone cannot grow, it cannot absorb water or pass it on.
+
+## Crafting
+
+Dripstone blocks cannot be crafted.
+
+All other sizes can be crafted using dripstone spikes. You can upgrade a
+dripstone item by surrounding it with (the same type of) dripstone spikes.
+Huge dripstone cannot be upgraded to a dripstone block, however.
+
+## Lua modders
+
+The following API functions are exposed for you to manipulate this mod with.
+
+- `noordstar_dripstone.add_lava_source(nodename)` Add a node name that the mod
+should consider a source of lava droplets above dripstone blocks.
+- `noordstar_dripstone.add_water_source(nodename)` Add a node name that the mod
+should consider a source of water droplets above dripstone blocks.
+- `noordstar_dripstone.add_lava_catcher(oldnodename, newnodename)` Register a
+node that can catch lava droplets to transform into a new node, such as a
+cauldron.
+- `noordstar_dripstone.add_water_catcher(oldnodename, newnodename)` Register a
+node that can catch water droplets to transform into a new node, such as a
+cauldron.
+
+All input values are strings in this API.

README.md

@@ -4,6 +4,9 @@ This Minetest mod adds dripstone to Minetest.
 
 ![Dripstone in various shapes and forms, absorbing water and lava](textures/noordstar_dripstone_preview.png)
 
+You can read the [API manual](API.md) for an extensive explanation on how the
+dripstone works in this mod.
+
 ## Contribute
 
 You can contribute by making pull requests or by reaching out to me

init.lua

@@ -1,50 +1,11 @@
-noordstar_dripstone = {
+noordstar_dripstone = {}
-    -- Nodes that the mod should consider as sources to extract water from
-    water_nodes =
-        { "default:river_water_source"
-        , "default:water_source"
-        , "mcl_core:water_source"
-        , "mclx_core:river_water_source"
-        }
-    
-    -- Nodes that the mod should consider as sources to extract lava from
-    , lava_nodes =
-        { "default:lava_source"
-        , "mcl_core:lava_source"
-        }
-}
-
-local modpath = minetest.get_modpath(minetest.get_current_modname())
-
-local function load(module_name)
-    return dofile(modpath .. "/lua/" .. module_name .. ".lua")
-end
-local function schem(module_name)
-    return dofile(modpath .. "/schematics/" .. module_name .. ".lua")
-end
-
--- Create a node box for any given dripstone size.
--- Size 8 is a normal block size
-local function nodebox_of_size(size)
-    return {
-        type = "fixed",
-        fixed = {
-            { - size / 16, -0.5, - size / 16, size / 16, 0.5, size / 16 },
-        },
-    }
-end
-
--- Sounds
-local dripstone_sounds = nil
-if mcl_sounds then
-    dripstone_sounds = mcl_sounds.node_sound_stone_defaults()
-end
 
 -- Constants
 local speed_factor = 30
 local seconds_per_growth = 10 * speed_factor
-local seconds_per_trickle = 1 * speed_factor
+local seconds_per_water_trickle = 1 * speed_factor
-local samples_per_interval = 10
+local seconds_per_lava_trickle = 6 * speed_factor
+local samples_per_interval = 30
 
 -- Namespaced node names
 local dry_dripstone_block = "noordstar_dripstone:dripstone_block"
@@ -80,6 +41,82 @@ local watered_dripstone_small = "noordstar_dripstone:small_watered_dripstone"
 local watered_dripstone_tiny = "noordstar_dripstone:tiny_watered_dripstone"
 local watered_dripstone_spike = "noordstar_dripstone:watered_dripstone_spike"
 
+local internal = {
+    -- Nodes that the mod should consider as sources to extract water from
+    water_nodes =
+        { "default:river_water_source"
+        , "default:water_source"
+        , "mcl_core:water_source"
+        , "mclx_core:river_water_source"
+        },
+    
+    -- Nodes that the mod should consider as sources to extract lava from
+    lava_nodes =
+        { "default:lava_source"
+        , "mcl_core:lava_source"
+        },
+
+    -- Nodes that can catch a lava droplet instead of letting a spike grow on top
+    lava_cauldrons = {
+        { from = dry_dripstone_spike, to = molten_dripstone_spike },
+        { from = "mcl_cauldrons:cauldron", to = "mcl_cauldrons:cauldron_1_lava" },
+        { from = "mcl_cauldrons:cauldron_1_lava", to = "mcl_cauldrons:cauldron_2_lava" },
+        { from = "mcl_cauldrons:cauldron_2_lava", to = "mcl_cauldrons:cauldron_3_lava" },
+    },
+
+    -- Nodes that can catch a water droplet instead of letting a spike grow on top
+    water_cauldrons = {
+        { from = dry_dripstone_spike, to = watered_dripstone_spike },
+        { from = "mcl_cauldrons:cauldron", to = "mcl_cauldrons:cauldron_1" },
+        { from = "mcl_cauldrons:cauldron_1", to = "mcl_cauldrons:cauldron_2" },
+        { from = "mcl_cauldrons:cauldron_2", to = "mcl_cauldrons:cauldron_3" },
+    }
+}
+
+function noordstar_dripstone.add_lava_source(nodename)
+    table.insert(internal.lava_nodes)
+end
+function noordstar_dripstone.add_water_source(nodename)
+    table.insert(internal.water_nodes, nodename)
+end
+
+function noordstar_dripstone.add_lava_catcher(nodename, newnodename)
+    table.insert(internal.lava_cauldrons, { from = nodename, to = newnodename })
+end
+function noordstar_dripstone.add_water_catcher(nodename, newnodename)
+    table.insert(internal.water_cauldrons, { from = nodename, to = newnodename })
+end
+
+
+-- Create a node box for any given dripstone size.
+-- Size 8 is a normal block size
+local function nodebox_of_size(size)
+    if size >= 8 then
+        return nil
+    else
+        return {
+            type = "fixed",
+            fixed = {
+                { - size / 16, -0.5, - size / 16, size / 16, 0.5, size / 16 },
+            },
+        }
+    end
+end
+
+local function nodebox_type(size)
+    if size >= 8 then
+        return "normal"
+    else
+        return "nodebox"
+    end
+end
+
+-- Sounds
+local dripstone_sounds = nil
+if mcl_sounds then
+    dripstone_sounds = mcl_sounds.node_sound_stone_defaults()
+end
+
 -- Trickle down config
 
 local lava_trickle_down = {
@@ -158,20 +195,8 @@ local water_trickle_down_spike = {
     { from = molten_dripstone_spike, to = hardened_dripstone_spike },
 }
 
-local lava_drop_down = {
-    { from = dry_dripstone_spike, to = molten_dripstone_spike },
-    { from = "mcl_cauldrons:cauldron", to = "mcl_cauldrons:cauldron_1_lava" },
-    { from = "mcl_cauldrons:cauldron_1_lava", to = "mcl_cauldrons:cauldron_2_lava" },
-    { from = "mcl_cauldrons:cauldron_2_lava", to = "mcl_cauldrons:cauldron_3_lava" },
-}
-local water_drop_down = {
-    { from = dry_dripstone_spike, to = watered_dripstone_spike },
-    { from = "mcl_cauldrons:cauldron", to = "mcl_cauldrons:cauldron_1" },
-    { from = "mcl_cauldrons:cauldron_1", to = "mcl_cauldrons:cauldron_2" },
-    { from = "mcl_cauldrons:cauldron_2", to = "mcl_cauldrons:cauldron_3" },
-}
-
 -- Tiles for dripstone
+
 local dry_dripstone_tiles =
     { "noordstar_dripstone_dripstone_top.png"
     , "noordstar_dripstone_dripstone_top.png"
@@ -193,78 +218,41 @@ local watered_dripstone_tiles =
     , "noordstar_dripstone_watered_dripstone_side.png"
     }
 
--- BASE BLOCKS
+-- Register dripstone nodes
--- These blocks are able to absorb water or lava from above them.
 
-minetest.register_node(dry_dripstone_block,
+local function make_dripstone(name, desc, longdesc, tiles, drop, size)
-    { description = "Dripstone block"
+    local sunlight_propagates = nil
-    , _doc_items_longdesc = "Dripstone block that can suck up liquids above it and creates stalactites below it."
+    if size < 8 then
-    , tiles = dry_dripstone_tiles
+        sunlight_propagates = true
-    , drawtype = "normal"
+    end
-    , groups = { pickaxey=2, material_stone=1 }
-    , is_ground_content = true
-    , drop = dry_dripstone_spike
-    , sounds = dripstone_sounds
-    , _mcl_hardness = 2
-    , _mcl_blast_resistance = 5
-    , _mcl_silk_touch_drop = true
-    }
-)
-minetest.register_node(hardened_dripstone_block,
-    { description = "Hardened dripstone block"
-    , _doc_items_longdesc = "Dripstone block that is no longer able to absorb liquids above it."
-    , tiles = hardened_dripstone_tiles
-    , drawtype = "normal"
-    , groups = { pickaxey=2, material_stone=1 }
-    , is_ground_content = true
-    , drop = dry_dripstone_spike
-    , sounds = dripstone_sounds
-    , _mcl_hardness = 2
-    , _mcl_blast_resistance = 5
-    , _mcl_silk_touch_drop = true
-    }
-)
-minetest.register_node(molten_dripstone_block,
-    { description = "Molten dripstone block"
-    , _doc_items_longdesc = "A dripstone block that has absorbed some lava, allowing it to form a stalactite."
-    , tiles = molten_dripstone_tiles
-    , drawtype = "normal"
-    , groups = { pickaxey=2, material_stone=1 }
-    , is_ground_content = true
-    , drop = dry_dripstone_spike
-    , sounds = dripstone_sounds
-    , _mcl_hardness = 2
-    , _mcl_blast_resistance = 5
-    , _mcl_silk_touch_drop = true
-    }
-)
-minetest.register_node(watered_dripstone_block,
-    { description = "Watered dripstone block"
-    , _doc_items_longdesc = "A dripstone block that has absorbed some water, allowing it to form a stalactite."
-    , tiles = watered_dripstone_tiles
-    , drawtype = "normal"
-    , groups = { pickaxey=2, material_stone=1 }
-    , is_ground_content = true
-    , drop = dry_dripstone_spike
-    , sounds = dripstone_sounds
-    , _mcl_hardness = 2
-    , _mcl_blast_resistance = 5
-    , _mcl_silk_touch_drop = true
-    }
-)
 
-local function make_dripstone(name, desc, longdesc, tiles, size)
     minetest.register_node(name,
         { description = desc
         , _doc_items_longdesc = longdesc
         , tiles = tiles
-        , groups = { pickaxey=2, material_stone=1 }
+        , groups = { pickaxey=2, material_stone=1, fall_damage_add_percent = math.max(4 - size, 0) / 4 * 100 }
         , is_ground_content = true
-        , drop = dry_dripstone_spike
+        , drop = {
+            max_items = math.floor((size + 1) / 2),
+            items = {
+                { rarity = 1
+                , items = { drop }
+                },
+                { rarity = 2
+                , items = { drop }
+                },
+                { rarity = 4
+                , items = { drop }
+                },
+                { rarity = 4
+                , items = { drop }
+                },
+            }
+        }
         , sounds = dripstone_sounds
-        , drawtype = "nodebox"
+        , drawtype = nodebox_type(size)
         , paramtype = "light"
-        , sunlight_propagates = true
+        , sunlight_propagates = sunlight_propagates
         , node_box = nodebox_of_size(size)
         , _mcl_hardness = 1.0 + size / 8
         , _mcl_blast_resistance = 1 + size / 2
@@ -273,6 +261,42 @@ local function make_dripstone(name, desc, longdesc, tiles, size)
     )
 end
 
+-- BASE BLOCKS
+-- These blocks are able to absorb water or lava from above them.
+
+make_dripstone(
+    dry_dripstone_block,
+    "Dripstone block",
+    "Dripstone block that can suck up liquids above it and creates stalactites below it.",
+    dry_dripstone_tiles,
+    dry_dripstone_spike,
+    8
+)
+make_dripstone(
+    hardened_dripstone_block,
+    "Hardened dripstone block",
+    "Dripstone block that is no longer able to absorb liquids above it.",
+    hardened_dripstone_tiles,
+    dry_dripstone_spike,
+    8
+)
+make_dripstone(
+    molten_dripstone_block,
+    "Molten dripstone block",
+    "A dripstone block that has absorbed some lava, allowing it to form a stalactite.",
+    molten_dripstone_tiles,
+    dry_dripstone_spike,
+    8
+)
+make_dripstone(
+watered_dripstone_block,
+    "Watered dripstone block",
+    "A dripstone block that has absorbed some water, allowing it to form a stalactite.",
+    watered_dripstone_tiles,
+    dry_dripstone_spike,
+    8
+)
+
 -- HUGE DRIPSTONE
 -- This is the largest form a non-block can get.
 
@@ -281,6 +305,7 @@ make_dripstone(
     "Huge dripstone",
     "Dripstone in the largest shape it can reach.",
     dry_dripstone_tiles,
+    dry_dripstone_spike,
     7
 )
 make_dripstone(
@@ -288,6 +313,7 @@ make_dripstone(
     "Huge hardened dripstone",
     "Dripstone in the largest shape it can reach. It is no longer able to grow or absorb liquids.",
     hardened_dripstone_tiles,
+    hardened_dripstone_spike,
     7
 )
 make_dripstone(
@@ -295,6 +321,7 @@ make_dripstone(
     "Huge molten dripstone",
     "Dripstone in the largest shape it can reach. It has absorbed some lava, but it can no longer grow in thickness.",
     molten_dripstone_tiles,
+    dry_dripstone_spike,
     7
 )
 make_dripstone(
@@ -302,6 +329,7 @@ make_dripstone(
     "Huge watered dripstone",
     "Dripstone in the largest shape it can reach. It has absorbed some water, but it can no longer grow in thickness.",
     watered_dripstone_tiles,
+    dry_dripstone_spike,
     7
 )
 
@@ -312,6 +340,7 @@ make_dripstone(
     "Large dripstone",
     "A thick layer of dripstone.",
     dry_dripstone_tiles,
+    dry_dripstone_spike,
     6
 )
 make_dripstone(
@@ -319,6 +348,7 @@ make_dripstone(
     "Large hardened dripstone",
     "A thick layer of dripstone. It is no longer able to grow or absorb liquids.",
     hardened_dripstone_tiles,
+    hardened_dripstone_spike,
     6
 )
 make_dripstone(
@@ -326,6 +356,7 @@ make_dripstone(
     "Large molten dripstone",
     "A thick layer of dripstone. It has absorbed some lava, so it is able to grow in thickness.",
     molten_dripstone_tiles,
+    dry_dripstone_spike,
     6
 )
 make_dripstone(
@@ -333,6 +364,7 @@ make_dripstone(
     "Large watered dripstone",
     "A thick layer of dripstone. It has absorbed some water, so it is able to grow in thickness.",
     watered_dripstone_tiles,
+    dry_dripstone_spike,
     6
 )
 
@@ -343,6 +375,7 @@ make_dripstone(
     "Great dripstone",
     "A thick layer of dripstone.",
     dry_dripstone_tiles,
+    dry_dripstone_spike,
     5
 )
 make_dripstone(
@@ -350,6 +383,7 @@ make_dripstone(
     "Great hardened dripstone",
     "A thick layer of dripstone. It is no longer able to grow or absorb liquids.",
     hardened_dripstone_tiles,
+    hardened_dripstone_spike,
     5
 )
 make_dripstone(
@@ -357,6 +391,7 @@ make_dripstone(
     "Great molten dripstone",
     "A thick layer of dripstone. It has absorbed some lava, so it is able to grow in thickness.",
     molten_dripstone_tiles,
+    dry_dripstone_spike,
     5
 )
 make_dripstone(
@@ -364,6 +399,7 @@ make_dripstone(
     "Great watered dripstone",
     "A thick layer of dripstone. It has absorbed some water, so it is able to grow in thickness.",
     watered_dripstone_tiles,
+    dry_dripstone_spike,
     5
 )
 
@@ -374,6 +410,7 @@ make_dripstone(
     "Medium dripstone",
     "A thick layer of dripstone.",
     dry_dripstone_tiles,
+    dry_dripstone_spike,
     4
 )
 make_dripstone(
@@ -381,6 +418,7 @@ make_dripstone(
     "Medium hardened dripstone",
     "A thick layer of dripstone. It is no longer able to grow or absorb liquids.",
     hardened_dripstone_tiles,
+    hardened_dripstone_spike,
     4
 )
 make_dripstone(
@@ -388,6 +426,7 @@ make_dripstone(
     "Medium molten dripstone",
     "A thick layer of dripstone. It has absorbed some lava, so it is able to grow in thickness.",
     molten_dripstone_tiles,
+    dry_dripstone_spike,
     4
 )
 make_dripstone(
@@ -395,6 +434,7 @@ make_dripstone(
     "Medium watered dripstone",
     "A thick layer of dripstone. It has absorbed some water, so it is able to grow in thickness.",
     watered_dripstone_tiles,
+    dry_dripstone_spike,
     4
 )
 
@@ -405,6 +445,7 @@ make_dripstone(
     "Small dripstone",
     "A thick layer of dripstone.",
     dry_dripstone_tiles,
+    dry_dripstone_spike,
     3
 )
 make_dripstone(
@@ -412,6 +453,7 @@ make_dripstone(
     "Small hardened dripstone",
     "A thick layer of dripstone. It is no longer able to grow or absorb liquids.",
     hardened_dripstone_tiles,
+    hardened_dripstone_spike,
     3
 )
 make_dripstone(
@@ -419,6 +461,7 @@ make_dripstone(
     "Small molten dripstone",
     "A thick layer of dripstone. It has absorbed some lava, so it is able to grow in thickness.",
     molten_dripstone_tiles,
+    dry_dripstone_spike,
     3
 )
 make_dripstone(
@@ -426,6 +469,7 @@ make_dripstone(
     "Small watered dripstone",
     "A thick layer of dripstone. It has absorbed some water, so it is able to grow in thickness.",
     watered_dripstone_tiles,
+    dry_dripstone_spike,
     3
 )
 
@@ -436,6 +480,7 @@ make_dripstone(
     "Tiny dripstone",
     "A thick layer of dripstone.",
     dry_dripstone_tiles,
+    dry_dripstone_spike,
     2
 )
 make_dripstone(
@@ -443,6 +488,7 @@ make_dripstone(
     "Tiny hardened dripstone",
     "A thick layer of dripstone. It is no longer able to grow or absorb liquids.",
     hardened_dripstone_tiles,
+    hardened_dripstone_spike,
     2
 )
 make_dripstone(
@@ -450,6 +496,7 @@ make_dripstone(
     "Tiny molten dripstone",
     "A thick layer of dripstone. It has absorbed some lava, so it is able to grow in thickness.",
     molten_dripstone_tiles,
+    dry_dripstone_spike,
     2
 )
 make_dripstone(
@@ -457,6 +504,7 @@ make_dripstone(
     "Tiny watered dripstone",
     "A thick layer of dripstone. It has absorbed some water, so it is able to grow in thickness.",
     watered_dripstone_tiles,
+    dry_dripstone_spike,
     2
 )
 
@@ -467,6 +515,7 @@ make_dripstone(
     "Dripstone spike",
     "A thick layer of dripstone.",
     dry_dripstone_tiles,
+    dry_dripstone_spike,
     1
 )
 make_dripstone(
@@ -474,6 +523,7 @@ make_dripstone(
     "Hardened dripstone spike",
     "A thick layer of dripstone. It is no longer able to grow or absorb liquids.",
     hardened_dripstone_tiles,
+    hardened_dripstone_spike,
     1
 )
 make_dripstone(
@@ -481,6 +531,7 @@ make_dripstone(
     "Molten dripstone spike",
     "A thick layer of dripstone. It has absorbed some lava, so it is able to grow in thickness.",
     molten_dripstone_tiles,
+    dry_dripstone_spike,
     1
 )
 make_dripstone(
@@ -488,6 +539,7 @@ make_dripstone(
     "Watered dripstone spike",
     "A thick layer of dripstone. It has absorbed some water, so it is able to grow in thickness.",
     watered_dripstone_tiles,
+    dry_dripstone_spike,
     1
 )
 
@@ -612,32 +664,32 @@ end
 
 -- ABSORB LIQUIDS
 
-make_abm(dry_dripstone_block, seconds_per_trickle, absorb_liquid)
+make_abm(dry_dripstone_block, seconds_per_water_trickle, absorb_liquid)
-make_abm(molten_dripstone_block, seconds_per_trickle, harden(function ()
+make_abm(molten_dripstone_block, seconds_per_lava_trickle, harden(function ()
     return noordstar_dripstone.water_nodes
 end))
-make_abm(watered_dripstone_block, seconds_per_trickle, harden(function ()
+make_abm(watered_dripstone_block, seconds_per_water_trickle, harden(function ()
     return noordstar_dripstone.lava_nodes
 end))
 
 -- TRICKLE DOWN
 
-make_abm(molten_dripstone_block, seconds_per_trickle, trickle_down(lava_trickle_down, dry_dripstone_block))
+make_abm(molten_dripstone_block, seconds_per_lava_trickle, trickle_down(lava_trickle_down, dry_dripstone_block))
-make_abm(watered_dripstone_block, seconds_per_trickle, trickle_down(water_trickle_down, dry_dripstone_block))
+make_abm(watered_dripstone_block, seconds_per_water_trickle, trickle_down(water_trickle_down, dry_dripstone_block))
-make_abm(molten_dripstone_huge, seconds_per_trickle, trickle_down(lava_trickle_down, dry_dripstone_huge))
+make_abm(molten_dripstone_huge, seconds_per_lava_trickle, trickle_down(lava_trickle_down, dry_dripstone_huge))
-make_abm(watered_dripstone_huge, seconds_per_trickle, trickle_down(water_trickle_down, dry_dripstone_huge))
+make_abm(watered_dripstone_huge, seconds_per_water_trickle, trickle_down(water_trickle_down, dry_dripstone_huge))
-make_abm(molten_dripstone_large, seconds_per_trickle, trickle_down(lava_trickle_down, dry_dripstone_large))
+make_abm(molten_dripstone_large, seconds_per_lava_trickle, trickle_down(lava_trickle_down, dry_dripstone_large))
-make_abm(watered_dripstone_large, seconds_per_trickle, trickle_down(water_trickle_down, dry_dripstone_large))
+make_abm(watered_dripstone_large, seconds_per_water_trickle, trickle_down(water_trickle_down, dry_dripstone_large))
-make_abm(molten_dripstone_great, seconds_per_trickle, trickle_down(lava_trickle_down, dry_dripstone_great))
+make_abm(molten_dripstone_great, seconds_per_lava_trickle, trickle_down(lava_trickle_down, dry_dripstone_great))
-make_abm(watered_dripstone_great, seconds_per_trickle, trickle_down(water_trickle_down, dry_dripstone_great))
+make_abm(watered_dripstone_great, seconds_per_water_trickle, trickle_down(water_trickle_down, dry_dripstone_great))
-make_abm(molten_dripstone_medium, seconds_per_trickle, trickle_down(lava_trickle_down, dry_dripstone_medium))
+make_abm(molten_dripstone_medium, seconds_per_lava_trickle, trickle_down(lava_trickle_down, dry_dripstone_medium))
-make_abm(watered_dripstone_medium, seconds_per_trickle, trickle_down(water_trickle_down, dry_dripstone_medium))
+make_abm(watered_dripstone_medium, seconds_per_water_trickle, trickle_down(water_trickle_down, dry_dripstone_medium))
-make_abm(molten_dripstone_small, seconds_per_trickle, trickle_down(lava_trickle_down, dry_dripstone_small))
+make_abm(molten_dripstone_small, seconds_per_lava_trickle, trickle_down(lava_trickle_down, dry_dripstone_small))
-make_abm(watered_dripstone_small, seconds_per_trickle, trickle_down(water_trickle_down, dry_dripstone_small))
+make_abm(watered_dripstone_small, seconds_per_water_trickle, trickle_down(water_trickle_down, dry_dripstone_small))
-make_abm(molten_dripstone_tiny, seconds_per_trickle, trickle_down(lava_trickle_down, dry_dripstone_tiny))
+make_abm(molten_dripstone_tiny, seconds_per_lava_trickle, trickle_down(lava_trickle_down, dry_dripstone_tiny))
-make_abm(watered_dripstone_tiny, seconds_per_trickle, trickle_down(water_trickle_down, dry_dripstone_tiny))
+make_abm(watered_dripstone_tiny, seconds_per_water_trickle, trickle_down(water_trickle_down, dry_dripstone_tiny))
-make_abm(molten_dripstone_spike, seconds_per_trickle, trickle_down(lava_trickle_down_spike, dry_dripstone_spike))
+make_abm(molten_dripstone_spike, seconds_per_lava_trickle, trickle_down(lava_trickle_down_spike, dry_dripstone_spike))
-make_abm(watered_dripstone_spike, seconds_per_trickle, trickle_down(water_trickle_down_spike, dry_dripstone_spike))
+make_abm(watered_dripstone_spike, seconds_per_water_trickle, trickle_down(water_trickle_down_spike, dry_dripstone_spike))
 
 -- GROW
 
@@ -656,5 +708,43 @@ make_abm(watered_dripstone_spike, seconds_per_growth*(4*4 - 2*2), grow_to(dry_dr
 
 -- DROP DOWN
 
-make_abm(molten_dripstone_spike, seconds_per_trickle, drop_down_to(lava_drop_down, dry_dripstone_spike))
+make_abm(molten_dripstone_spike, seconds_per_lava_trickle, drop_down_to(lava_drop_down, dry_dripstone_spike))
-make_abm(watered_dripstone_spike, seconds_per_trickle, drop_down_to(water_drop_down, dry_dripstone_spike))
+make_abm(watered_dripstone_spike, seconds_per_water_trickle, drop_down_to(water_drop_down, dry_dripstone_spike))
+
+-- CRATING RECIPES
+
+local function gapple_recipe(gold, apple, gapple)
+    minetest.register_craft({
+        output = gapple,
+        recipe = {
+            { gold,  gold, gold },
+            { gold, apple, gold },
+            { gold,  gold, gold },
+        }
+    })
+end
+
+gapple_recipe(dry_dripstone_spike, dry_dripstone_spike, dry_dripstone_tiny)
+gapple_recipe(dry_dripstone_spike, dry_dripstone_tiny, dry_dripstone_small)
+gapple_recipe(dry_dripstone_spike, dry_dripstone_small, dry_dripstone_medium)
+gapple_recipe(dry_dripstone_spike, dry_dripstone_medium, dry_dripstone_great)
+gapple_recipe(dry_dripstone_spike, dry_dripstone_great, dry_dripstone_large)
+gapple_recipe(dry_dripstone_spike, dry_dripstone_large, dry_dripstone_huge)
+gapple_recipe(hardened_dripstone_spike, hardened_dripstone_spike, hardened_dripstone_tiny)
+gapple_recipe(hardened_dripstone_spike, hardened_dripstone_tiny, hardened_dripstone_small)
+gapple_recipe(hardened_dripstone_spike, hardened_dripstone_small, hardened_dripstone_medium)
+gapple_recipe(hardened_dripstone_spike, hardened_dripstone_medium, hardened_dripstone_great)
+gapple_recipe(hardened_dripstone_spike, hardened_dripstone_great, hardened_dripstone_large)
+gapple_recipe(hardened_dripstone_spike, hardened_dripstone_large, hardened_dripstone_huge)
+gapple_recipe(molten_dripstone_spike, molten_dripstone_spike, molten_dripstone_tiny)
+gapple_recipe(molten_dripstone_spike, molten_dripstone_tiny, molten_dripstone_small)
+gapple_recipe(molten_dripstone_spike, molten_dripstone_small, molten_dripstone_medium)
+gapple_recipe(molten_dripstone_spike, molten_dripstone_medium, molten_dripstone_great)
+gapple_recipe(molten_dripstone_spike, molten_dripstone_great, molten_dripstone_large)
+gapple_recipe(molten_dripstone_spike, molten_dripstone_large, molten_dripstone_huge)
+gapple_recipe(watered_dripstone_spike, watered_dripstone_spike, watered_dripstone_tiny)
+gapple_recipe(watered_dripstone_spike, watered_dripstone_tiny, watered_dripstone_small)
+gapple_recipe(watered_dripstone_spike, watered_dripstone_small, watered_dripstone_medium)
+gapple_recipe(watered_dripstone_spike, watered_dripstone_medium, watered_dripstone_great)
+gapple_recipe(watered_dripstone_spike, watered_dripstone_great, watered_dripstone_large)
+gapple_recipe(watered_dripstone_spike, watered_dripstone_large, watered_dripstone_huge)