minetest-mod-snow/mapgen.lua

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local mgname = ""
--Identify the mapgen.
minetest.register_on_mapgen_init(function(MapgenParams)
if MapgenParams.mgname then
mgname = MapgenParams.mgname
else
io.write("[MOD] Snow Biomes: WARNING! mapgen could not be identifyed!\n")
end
if mgname == "v7" then
--Load mapgen_v7 compatibility.
dofile(minetest.get_modpath("snow").."/mapgen_v7.lua")
else
--Load mapgen_v6 compatibility.
dofile(minetest.get_modpath("snow").."/mapgen_v6.lua")
end
end)
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local pine_tree = {
axiom="TABff",
rules_a="[&T+f+ff+ff+ff+f]GA",
rules_b="[&T+f+Gf+Gf+Gf]GB",
trunk="default:tree",
leaves="snow:needles",
angle=90,
iterations=1,
random_level=0,
trunk_type="single",
thin_branches=true,
}
local xmas_tree = {
axiom="TABff",
rules_a="[&T+f+ff+ff+ff+f]GA",
rules_b="[&T+f+Gf+Gf+Gf]GB",
trunk="default:tree",
leaves="snow:needles_decorated",
angle=90,
iterations=1,
random_level=0,
trunk_type="single",
thin_branches=true,
}
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--Makes pine tree
function snow.make_pine(pos,snow,xmas)
local env = minetest.env
local perlin1 = env:get_perlin(112,3, 0.5, 150)
local try_node = function(pos, node)
local n = env:get_node(pos).name
if n == "air" or n == "ignore" then
env:add_node(pos,node)
end
end
--Clear ground.
for x=-1,1 do
for z=-1,1 do
if env:get_node({x=pos.x+x,y=pos.y,z=pos.z+z}).name == "snow:snow" then
env:remove_node({x=pos.x+x,y=pos.y,z=pos.z+z})
end
if env:get_node({x=pos.x+x,y=pos.y,z=pos.z+z}).name == "snow:snow_block" then
env:remove_node({x=pos.x+x,y=pos.y,z=pos.z+z})
end
end
end
if xmas then
env:remove_node(pos)
minetest.env:spawn_tree(pos, xmas_tree)
else
minetest.env:spawn_tree(pos, pine_tree)
end
if snow then
local x,z = pos.x,pos.z
try_node({x=x+1,y=pos.y+3,z=z+1},{name="snow:snow"})
try_node({x=x-1,y=pos.y+3,z=z-1},{name="snow:snow"})
try_node({x=x-1,y=pos.y+3,z=z+1},{name="snow:snow"})
try_node({x=x+1,y=pos.y+3,z=z-1},{name="snow:snow"})
try_node({x=x+1,y=pos.y+5,z=z},{name="snow:snow"})
try_node({x=x-1,y=pos.y+5,z=z},{name="snow:snow"})
try_node({x=x,y=pos.y+5,z=z+1},{name="snow:snow"})
try_node({x=x,y=pos.y+5,z=z-1},{name="snow:snow"})
end
if xmas then
try_node({x=pos.x,y=pos.y+7,z=pos.z},{name="snow:star"})
elseif snow and perlin1:get2d({x=pos.x,y=pos.z}) > 0.53 then
try_node({x=pos.x,y=pos.y+7,z=pos.z},{name="snow:snow"})
end
end
--Makes pine tree
function snow.voxelmanip_pine(pos,a,data)
local c_snow = minetest.get_content_id("default:snow")
local c_pine_needles = minetest.get_content_id("snow:needles")
local c_tree = minetest.get_content_id("default:tree")
local c_air = minetest.get_content_id("air")
local perlin1 = minetest.get_perlin(112,3, 0.5, 150)
--Clear ground.
for x=-1,1 do
for z=-1,1 do
local node = a:index(pos.x+x,pos.y,pos.z+z)
if data[node] == c_snow then
data[node] = c_air
end
end
end
--Make tree.
for i=0, 4 do
if i==1 or i==2 then
for x=-1,1 do
for z=-1,1 do
local x = pos.x + x
local z = pos.z + z
local node = a:index(x,pos.y+i,z)
data[node] = c_pine_needles
if snow and x ~= 0 and z ~= 0 and perlin1:get2d({x=x,y=z}) > 0.53 then
local abovenode = a:index(x,pos.y+i+1,z)
data[abovenode] = c_snow
end
end
end
end
if i==3 or i==4 then
local x = pos.x
local y = pos.y+i
local z = pos.z
data[a:index(x+1,y,z)] = c_pine_needles
data[a:index(x-1,y,z)] = c_pine_needles
data[a:index(x,y,z+1)] = c_pine_needles
data[a:index(x,y,z-1)] = c_pine_needles
if snow then
if perlin1:get2d({x=x+1,y=z}) > 0.53 then
data[a:index(x+1,y+1,z)] = c_snow
end
if perlin1:get2d({x=x+1,y=z}) > 0.53 then
data[a:index(x-1,y+1,z)] = c_snow
end
if perlin1:get2d({x=x,y=z+1}) > 0.53 then
data[a:index(x,y+1,z+1)] = c_snow
end
if perlin1:get2d({x=x,y=z-1}) > 0.53 then
data[a:index(x,y+1,z-1)] = c_snow
end
end
end
data[a:index(pos.x,pos.y+i,pos.z)] = c_tree
end
data[a:index(pos.x,pos.y+5,pos.z)] = c_pine_needles
data[a:index(pos.x,pos.y+6,pos.z)] = c_pine_needles
if snow and perlin1:get2d({x=pos.x,y=pos.z}) > 0.53 then
data[a:index(pos.x,pos.y+7,pos.z)] = c_snow
end
end