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Add fumaroles (Nether chimneys)
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Or they can be used on the surface as cottage chimneys.
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@Treer
Treer committed Feb 18, 2020
1 parent c0f7608 commit d652144
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Showing 5 changed files with 452 additions and 12 deletions.
3 changes: 3 additions & 0 deletions README.md
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Expand Up @@ -39,6 +39,9 @@ SOFTWARE.
* `nether_book_`* (files starting with "nether_book"): Treer, 2019-2020
* `nether_portal_ignition_failure.ogg`: Treer, 2019
* `nether_particle_anim`* (files starting with "nether_particle_anim"): Treer, 2019
* `nether_fumarole.ogg`: Treer, 2020
* `nether_smoke_puff.png` is a derivative work of gleamyRock.gif by Spring (https://opengameart.org/users/spring), used
under CC0 1.0. "Nether smoke puff" is licenced under CC BY-SA 4.0 Treer, 2020

### [Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0)](http://creativecommons.org/licenses/by-sa/3.0/)
* `nether_rack.png`: Zeg9
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226 changes: 214 additions & 12 deletions mapgen_decorations.lua
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Expand Up @@ -25,12 +25,22 @@
-- emerged or not before the decoration was placed.
local allow_lava_decorations = nether.useBiomes

local _ = {name = "air", prob = 0}
local A = {name = "air", prob = 255, force_place = true}
local G = {name = "nether:glowstone", prob = 255, force_place = true}
local N = {name = "nether:rack", prob = 255}
local S = {name = "nether:sand", prob = 255, force_place = true}
local L = {name = "default:lava_source", prob = 255, force_place = true}
local _ = {name = "air", prob = 0}
local A = {name = "air", prob = 255, force_place = true}
local G = {name = "nether:glowstone", prob = 255, force_place = true}
local N = {name = "nether:rack", prob = 255}
local S = {name = "nether:sand", prob = 255, force_place = true}
local L = {name = "default:lava_source", prob = 255, force_place = true}
local F = {name = "nether:fumarole", prob = 255, force_place = true}
local FS = {name = "nether:fumarole_slab", prob = 255, force_place = true}
local F1 = {name = "nether:fumarole_corner", prob = 255, force_place = true, param2 = 0}
local F2 = {name = "nether:fumarole_corner", prob = 255, force_place = true, param2 = 1}
local F3 = {name = "nether:fumarole_corner", prob = 255, force_place = true, param2 = 2}
local F4 = {name = "nether:fumarole_corner", prob = 255, force_place = true, param2 = 3}
local S1 = {name = "stairs:stair_netherrack", prob = 255, force_place = true, param2 = 5}
local S2 = {name = "stairs:stair_netherrack", prob = 255, force_place = true, param2 = 7}
local S3 = {name = "stairs:stair_netherrack", prob = 255, force_place = true, param2 = 12}
local S4 = {name = "stairs:stair_netherrack", prob = 255, force_place = true, param2 = 16}


-- =================
Expand All @@ -39,7 +49,7 @@ local L = {name = "default:lava_source", prob = 255, force_place = true}

local schematic_GlowstoneStalactite = {
size = {x = 5, y = 10, z = 5},
data = {
data = { -- note that data is upside down
_, _, _, _, _,
_, _, _, _, _,
_, _, _, _, _,
Expand Down Expand Up @@ -143,19 +153,19 @@ minetest.register_decoration({
-- =======================================
-- if player places a torch/block on this sand or digs it while standing on it, it sinks into lava

if allow_lava_decorations then
if allow_lava_decorations then
minetest.register_decoration({
name = "Weak trap",
deco_type = "schematic",
place_on = "nether:rack",
sidelen = 80,
fill_ratio = 0.002,
biomes = {"nether_caverns"},
y_max = NETHER_CEILING, -- keep compatibility with mapgen_nobiomes.lua
y_min = NETHER_FLOOR,
y_max = nether.DEPTH, -- keep compatibility with mapgen_nobiomes.lua
y_min = nether.DEPTH_FLOOR,
schematic = {
size = {x = 4, y = 7, z = 4},
data = {
data = { -- note that data is upside down
_, _, _, _,
_, _, _, _,
_, N, _, _,
Expand All @@ -165,7 +175,7 @@ if allow_lava_decorations then
_, _, _, _,

_, N, _, _, -- make it look like a stalactite if it protrudes out the bottom of a landform
_, N, _, _,
_, N, _, _,
N, L, N, _,
N, L, L, N,
N, L, L, N,
Expand Down Expand Up @@ -195,3 +205,195 @@ if allow_lava_decorations then
rotation = "random"
})
end


-- ==========================
-- Fumaroles (Chimneys)
-- ==========================


local replacements_slab = {}
local replacements_full = {["nether:fumarole_slab"] = "nether:fumarole"}

if allow_lava_decorations then
-- Minetest engine limitations mean any mesh or nodebox node (like nether:fumarole)
-- will light up if it has lava below it, so replace the air node over the lava with
-- a node that prevents light propagation.
-- (Unfortunately this also means if a player digs down to get the lava block it'll
-- look like the lighting wasn't set in the block above the lava)
replacements_slab["air"] = "nether:airlike_darkness"
replacements_full["air"] = "nether:airlike_darkness"
else
-- Lava is frequently removed by the old mapgen, so put sand at the bottom
-- of fumaroles.
replacements_slab["default:lava_source"] = "nether:sand"
replacements_full["default:lava_source"] = "nether:sand"
end


local schematic_fumarole = {
size = {x = 3, y = 5, z = 3},
data = { -- note that data is upside down
_, _, _,
_, N, _,
_, N, _,
_, _, _,
_, _, _,

_, N, _,
N, L, N,
N, A, N,
_, F, _,
_,FS, _,

_, _, _,
_, N, _,
_, N, _,
_, _, _,
_, _, _,
},
}

-- Common fumarole decoration that's flush with the floor and spawns everywhere

minetest.register_decoration({
name = "Sunken nether fumarole",
deco_type = "schematic",
place_on = {"nether:rack"},
sidelen = 80,
fill_ratio = 0.005,
biomes = {"nether_caverns"},
y_max = nether.DEPTH,
y_min = nether.DEPTH_FLOOR,
schematic = schematic_fumarole,
replacements = replacements_full,
flags = "place_center_x,place_center_z,all_floors",
place_offset_y=-4
})


-- Rarer formations of raised fumaroles in clumps

local fumarole_clump_noise_offset = -0.58
local fumarole_clump_noise = {
offset = fumarole_clump_noise_offset,
scale = 0.5,
spread = {x = 40, y = 40, z = 15},
octaves = 4,
persist = 0.65,
lacunarity = 2.0,
}

fumarole_clump_noise.offset = fumarole_clump_noise_offset - 0.035
minetest.register_decoration({
name = "Raised Nether fumarole",
deco_type = "schematic",
place_on = {"nether:rack"},
sidelen = 8,
noise_params = fumarole_clump_noise,
biomes = {"nether_caverns"},
y_max = nether.DEPTH,
y_min = nether.DEPTH_FLOOR,
schematic = schematic_fumarole,
replacements = replacements_full,
flags = "place_center_x,place_center_z,all_floors",
place_offset_y=-3
})

fumarole_clump_noise.offset = fumarole_clump_noise_offset
minetest.register_decoration({
name = "Half-raised Nether fumarole",
deco_type = "schematic",
place_on = {"nether:rack"},
sidelen = 8,
noise_params = fumarole_clump_noise,
biomes = {"nether_caverns"},
y_max = nether.DEPTH,
y_min = nether.DEPTH_FLOOR,
schematic = schematic_fumarole,
replacements = replacements_slab,
flags = "place_center_x,place_center_z,all_floors",
place_offset_y=-3
})

fumarole_clump_noise.offset = fumarole_clump_noise_offset - 0.035
minetest.register_decoration({
name = "Nether fumarole mound",
deco_type = "schematic",
place_on = {"nether:rack"},
sidelen = 8,
noise_params = fumarole_clump_noise,
biomes = {"nether_caverns"},
y_max = nether.DEPTH,
y_min = nether.DEPTH_FLOOR,
schematic = {
size = {x = 4, y = 4, z = 4},
data = { -- note that data is upside down
_, _, _, _,
_, N, N, _,
_, _, _, _,
_, _, _, _,

_, S, S, _,
N, A, A, N,
_, S2, S1, _,
_, F2, F1, _,

_, S, S, _,
N, A, A, N,
_, S3, S4, _,
_, F3, F4, _,

_, _, _, _,
_, N, N, _,
_, _, _, _,
_, _, _, _
},
yslice_prob = {{ypos = 3, prob = 192}} -- occasionally leave the fumarole cap off
},
flags = "place_center_x,place_center_z,all_floors",
place_offset_y = -2
})

fumarole_clump_noise.offset = fumarole_clump_noise_offset - 0.01
minetest.register_decoration({
name = "Double Nether fumarole",
deco_type = "schematic",
place_on = {"nether:rack"},
sidelen = 8,
noise_params = fumarole_clump_noise,
biomes = {"nether_caverns"},
y_max = nether.DEPTH,
y_min = nether.DEPTH_FLOOR,
schematic = {
size = {x = 4, y = 5, z = 4},
data = { -- note that data is upside down
_, _, _, _,
_, N, N, _,
_, _, _, _,
_, _, _, _,
_, _, _, _,

_, S, S, _,
N, A, A, N,
_, S2, S1, _,
_, F2, F, _,
_, _, FS, _,

_, S, S, _,
F, A, A, N, -- the F may add slight variance in landforms where it gets exposed
_, S3, S4, _,
_, F3, F4, _,
_, _, _, _,

_, _, _, _,
_, N, N, _,
_, _, _, _,
_, _, _, _,
_, _, _, _
}
},
flags = "place_center_x,place_center_z,all_floors",
place_offset_y = -2,
rotation = "random"
})
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