minetest-mod-snow/src/mapgen.lua

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--[[
If you want to run PlantLife and mods that depend on it, i.e. MoreTrees, Disable the mapgen by
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commenting-out the lines starting with "local mgname = " through "end" (I left a note were to start
and stop) Disabling "Snow's" mapgen allows MoreTrees and PlantLife to do their thing until the
issue is figured out. However, the pine and xmas tree code is still needed for when those
saplings grow into trees. --]]
--The *starting* comment looks like this: --[[
--The *closing* comment looks like this: --]]
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-- ~ LazyJ, 2014_05_13
-- Part 1: To disable the mapgen, add the *starting* comment under this line.
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snow.mapgen = snow.mapgen or {}
local mg = snow.mapgen
-- perlin noise "hills" are not peaks but looking like sinus curve
local function upper_rarity(rarity)
return math.sign(rarity)*math.sin(math.abs(rarity)*math.pi/2)
end
local rarity = snow.mapgen_rarity
local size = snow.mapgen_size
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local smooth = snow.smooth_biomes
local nosmooth_rarity, perlin_scale
local function calc_values()
nosmooth_rarity = 1-rarity/50
perlin_scale = size*100/rarity
mg.perlin_scale = perlin_scale
local smooth_rarity_max, smooth_rarity_min, smooth_rarity_dif
if smooth then
local smooth_trans_size = 4 --snow.smooth_trans_size
mg.smooth_rarity_max = upper_rarity(nosmooth_rarity+smooth_trans_size*2/perlin_scale)
mg.smooth_rarity_min = upper_rarity(nosmooth_rarity-smooth_trans_size/perlin_scale)
mg.smooth_rarity_dif = mg.smooth_rarity_max-mg.smooth_rarity_min
end
nosmooth_rarity = upper_rarity(nosmooth_rarity)
mg.nosmooth_rarity = nosmooth_rarity
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end
calc_values()
snow.register_on_configuring(function(name, v)
if name == "mapgen_rarity" then
rarity = v
elseif name == "mapgen_size" then
size = v
elseif name == "smooth_biomes" then
smooth = v
else
return
end
-- TODO: if e.g. size and rarity get changed at once, don't calculate the values more times
calc_values()
end)
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--Identify the mapgen.
local mgname = minetest.get_mapgen_setting"mg_name"
if not mgname then
minetest.log("error", "[MOD] Snow Biomes: WARNING! mapgen could not be identifyed!")
end
local path = minetest.get_modpath"snow"
if mgname == "v7" then
--Load mapgen_v7 compatibility.
dofile(path.."/src/mapgen_v7.lua")
else
--Load mapgen_v6 compatibility.
dofile(path.."/src/mapgen_v6.lua")
end
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-- To complete the commenting-out add the *closing* comment under this line.
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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:pinetree",
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leaves="snow:needles",
angle=90,
iterations=1,
random_level=0,
trunk_type="single",
thin_branches=true,
}
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local xmas_tree = {
axiom="TABff",
rules_a="[&T+f+ff+ff+ff+f]GA",
rules_b="[&T+f+Gf+Gf+Gf]GB",
trunk="default:pinetree",
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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)
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local minetest = minetest
local try_node = function(pos, node)
local n = minetest.get_node(pos).name
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if n == "air"
or n == "ignore" then
minetest.add_node(pos, node)
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end
end
if xmas then
minetest.remove_node(pos)
minetest.spawn_tree(pos, xmas_tree)
else
minetest.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="default:snow"})
try_node({x=x-1,y=pos.y+3,z=z-1},{name="default:snow"})
try_node({x=x-1,y=pos.y+3,z=z+1},{name="default:snow"})
try_node({x=x+1,y=pos.y+3,z=z-1},{name="default:snow"})
try_node({x=x+1,y=pos.y+5,z=z},{name="default:snow"})
try_node({x=x-1,y=pos.y+5,z=z},{name="default:snow"})
try_node({x=x,y=pos.y+5,z=z+1},{name="default:snow"})
try_node({x=x,y=pos.y+5,z=z-1},{name="default:snow"})
end
if xmas then
try_node({x=pos.x,y=pos.y+7,z=pos.z},{name="snow:star_lit"}) -- Added lit star. ~ LazyJ
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elseif snow
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and minetest.get_perlin(112,3, 0.5, perlin_scale):get2d({x=pos.x,y=pos.z}) > nosmooth_rarity then
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try_node({x=pos.x,y=pos.y+7,z=pos.z},{name="default:snow"})
end
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end
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--Makes pine tree
function snow.voxelmanip_pine(pos,a,data)
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local c_snow = minetest.get_content_id("default:snow")
local c_pine_needles = minetest.get_content_id("snow:needles")
local c_pinetree = minetest.get_content_id("default:pinetree")
local c_air = minetest.get_content_id("air")
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local perlin1 = minetest.get_perlin(112,3, 0.5, perlin_scale)
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for z = -1,1 do
local z = pos.z + z
for x = -1,1 do
local x = pos.x + x
--Make tree.
for i = 1,2 do
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data[a:index(x,pos.y+i,z)] = c_pine_needles
if x ~= 0
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and z ~= 0
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and perlin1:get2d({x=x,y=z}) > nosmooth_rarity then
local abovenode = a:index(x,pos.y+i+1,z)
data[abovenode] = c_snow
end
end
end
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end
for i=3, 4 do
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
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if perlin1:get2d({x=x+1,y=z}) > nosmooth_rarity then
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data[a:index(x+1,y+1,z)] = c_snow
end
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if perlin1:get2d({x=x+1,y=z}) > nosmooth_rarity then
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data[a:index(x-1,y+1,z)] = c_snow
end
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if perlin1:get2d({x=x,y=z+1}) > nosmooth_rarity then
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data[a:index(x,y+1,z+1)] = c_snow
end
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if perlin1:get2d({x=x,y=z-1}) > nosmooth_rarity then
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data[a:index(x,y+1,z-1)] = c_snow
end
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end
for i=0, 4 do
data[a:index(pos.x,pos.y+i,pos.z)] = c_pinetree
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
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if perlin1:get2d({x=pos.x,y=pos.z}) > nosmooth_rarity then
data[a:index(pos.x,pos.y+7,pos.z)] = c_snow
end
end