nalc/minetest-mod-snow
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dont generate every snow node with the same height, use the weierstraß function

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This commit is contained in:
HybridDog 2015-06-05 14:57:54 +02:00
parent 32b08f6738
commit 0443994f06
1 changed files with 64 additions and 7 deletions
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71
src/mapgen_v6.lua
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@ -31,6 +31,31 @@ local function biome_to_string(num,num2)
return biome
end
local function do_ws_func(a, x)
local n = x/(16000)
local y = 0
for k=1,1000 do
y = y + 1000*(math.sin(math.pi * k^a * n)/(math.pi * k^a))
end
return y
end
local ws_lists = {}
local function get_ws_list(a,x)
ws_lists[a] = ws_lists[a] or {}
local v = ws_lists[a][x]
if v then
return v
end
v = {}
for x=x,x + (80 - 1) do
local y = do_ws_func(a, x)
v[x] = y
end
ws_lists[a][x] = v
return v
end
-- On generated function
minetest.register_on_generated(function(minp, maxp, seed)
@ -68,6 +93,8 @@ minetest.register_on_generated(function(minp, maxp, seed)
local area = VoxelArea:new({MinEdge=emin, MaxEdge=emax})
local data = vm:get_data()
local snow_tab,num = {},1
local sidelen = x1 - x0 + 1
local chulens = {x=sidelen, y=sidelen, z=sidelen}
local nvals_cold = minetest.get_perlin_map(np_cold, chulens):get2dMap_flat({x=x0, y=z0})
@ -157,7 +184,8 @@ minetest.register_on_generated(function(minp, maxp, seed)
if ground_y and data[node] == c_dirt_with_grass then
if alpine and test > 0.53 then
data[abovenode] = c_snow
snow_tab[num] = {abovenode, z, x, test}
num = num+1
for y = ground_y, -6, -1 do
local vi = area:index(x, y, z)
if data[vi] == c_stone then
@ -176,18 +204,21 @@ minetest.register_on_generated(function(minp, maxp, seed)
data[abovenode] = c_snow_block
else
data[node] = c_dirt_with_snow
data[abovenode] = c_snow
snow_tab[num] = {abovenode, z, x, test}
num = num+1
end
elseif ground_y and data[node] == c_sand then
if not icy then
data[abovenode] = c_snow
snow_tab[num] = {abovenode, z, x, test}
num = num+1
else
data[node] = c_ice
end
elseif ground_y and data[node] == c_leaves
or data[node] == c_jungleleaves or data[node] == c_apple then
if alpine then
data[abovenode] = c_snow
snow_tab[num] = {abovenode, z, x, test}
num = num+1
for y = ground_y, -6, -1 do
local stone = area:index(x, y, z)
if data[stone] == c_stone then
@ -197,7 +228,8 @@ minetest.register_on_generated(function(minp, maxp, seed)
end
end
else
data[abovenode] = c_snow
snow_tab[num] = {abovenode, z, x, test}
num = num+1
end
elseif ground_y
and data[node] == c_junglegrass then
@ -207,8 +239,8 @@ minetest.register_on_generated(function(minp, maxp, seed)
for y = ground_y, ground_y-4, -1 do
local vi = area:index(x, y, z)
if data[vi] == c_papyrus then
local via = area:index(x, ground_y, z)
data[via] = c_snow
snow_tab[num] = {area:index(x, ground_y, z), z, x, test}
num = num+1
data[vi] = c_snow_block
end
end
@ -274,7 +306,32 @@ minetest.register_on_generated(function(minp, maxp, seed)
end
end
local param2s
if num ~= 1 then
local wsz, wsx
for _,i in pairs(snow_tab) do
data[i[1]] = c_snow
if i[4] > 0.75 then
if not wsz then
wsz = get_ws_list(5, z0)
wsx = get_ws_list(2, x0)
param2s = vm:get_param2_data()
end
local id = math.floor(wsx[i[3]]+wsz[i[2]]*5)%9+1
if id ~= 1 then
if id == 9 then
id = 4
end
param2s[i[1]] = id*7
end
end
end
end
vm:set_data(data)
if param2s then
vm:set_param2_data(param2s)
end
vm:set_lighting({day=0, night=0})
vm:calc_lighting()
vm:write_to_map()