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DigWorks/mods/MAPGEN/mcl_structures/geode.lua

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local adjacents = {
vector.new(1,0,0),
vector.new(-1,0,0),
vector.new(0,0,1),
vector.new(0,0,-1),
vector.new(0,1,0),
vector.new(0,-1,0)
}
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local function set_node_no_bedrock(pos, node)
if not pos then return end
local n = minetest.get_node(pos)
if n.name == "mcl_core:bedrock" then return end
return minetest.set_node(pos,node)
end
local function makegeode(pos,def,pr)
local size = pr:next(5,7)
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local p1 = vector.offset(pos,-size,-size,-size)
local p2 = vector.offset(pos,size,size,size)
minetest.emerge_area(p1, p2, function(blockpos, action, calls_remaining, param)
if calls_remaining ~= 0 then return end
local calcite = {}
local nn = minetest.find_nodes_in_area(p1,p2,{"group:material_stone","group:dirt","mcl_core:gravel"})
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if not nn or #nn < 2 then
minetest.log("action", "Not enough valid space to generate geode at pos: " .. minetest.pos_to_string(pos))
return
end
table.sort(nn,function(a, b)
return vector.distance(pos, a) < vector.distance(pos, b)
end)
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--if not nn[1] then return end
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for i=1,pr:next(1, math.max(2, #nn - math.ceil(#nn/5) )) do
set_node_no_bedrock(nn[i],{name="mcl_amethyst:amethyst_block"})
end
for k,v in pairs(minetest.find_nodes_in_area(p1,p2,{"mcl_amethyst:amethyst_block"})) do
local all_amethyst = true
for kk,vv in pairs(adjacents) do
local pp = vector.add(v,vv)
local an = minetest.get_node(pp)
if an.name ~= "mcl_amethyst:amethyst_block" then
if minetest.get_item_group(an.name,"material_stone") > 0 then
set_node_no_bedrock(pp,{name="mcl_amethyst:calcite"})
table.insert(calcite,pp)
if pr:next(1,5) == 1 then
set_node_no_bedrock(v,{name="mcl_amethyst:budding_amethyst_block"})
end
all_amethyst = false
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elseif an.name ~= "mcl_amethyst:amethyst_block" and an.name ~= "air" and an.name ~= "mcl_amethyst:budding_amethyst_block" then
all_amethyst = false
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end
end
end
if all_amethyst then set_node_no_bedrock(v,{name="air"}) end
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end
for _,v in pairs(calcite) do
for _,vv in pairs(minetest.find_nodes_in_area(vector.offset(v,-1,-1,-1),vector.offset(v,1,1,1),{"group:material_stone"})) do
set_node_no_bedrock(vv,{name="mcl_blackstone:basalt_smooth"})
end
end
for k,v in pairs(minetest.find_nodes_in_area_under_air(p1,p2,{"mcl_amethyst:amethyst_block","mcl_amethyst:budding_amethyst_block"})) do
local r = pr:next(1,50)
if r < 10 then
set_node_no_bedrock(vector.offset(v,0,1,0),{name="mcl_amethyst:amethyst_cluster",param2=1})
end
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end
return true
end)
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return true
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end
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mcl_structures.register_structure("geode",{
place_on = {"group:material_stone"},
noise_params = {
offset = 0,
scale = 0.00022,
spread = {x = 250, y = 250, z = 250},
seed = 7894353,
octaves = 3,
persist = 0.001,
flags = "absvalue",
},
flags = "force_placement",
terrain_feature = true,
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y_max = -24,
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y_min = mcl_vars.mg_overworld_min,
y_offset = function(pr) return pr:next(-4,-2) end,
place_func = makegeode,
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})