mtcontrib/nether-pack
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use the weierstrass function to decorate the nether forest top (similar to http://a.pomf.se/niypzy.png)

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HybridDog 2015-05-20 21:01:10 +02:00
parent 21171ceb2c
commit 0d07fa3cd4
2 changed files with 48 additions and 3 deletions
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3
README.txt
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@ -7,4 +7,5 @@ http://i.imgur.com/pMZYqt9.png
TODO: TODO:
— finish nether forest — care about nether torches
— find out why the nether forests top is sometimes flat

48
nether/init.lua
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@ -125,6 +125,36 @@ local function table_contains(t, v)
return false return false
end end
-- Weierstrass function stuff from https://github.com/slemonide/gen
local SIZE = 1000
local ssize = math.ceil(math.abs(SIZE))
local function do_ws_func(depth, a, x)
local n = x/(16*SIZE)
local y = 0
for k=1,depth do
y = y + SIZE*(math.sin(math.pi * k^a * n)/(math.pi * k^a))
end
return y
end
local chunksize = minetest.setting_get("chunksize") or 5
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 + (chunksize*16 - 1) do
local y = do_ws_func(ssize, a, x)
v[x] = y
end
ws_lists[a][x] = v
return v
end
local function dif(z1, z2) local function dif(z1, z2)
if z1 < 0 if z1 < 0
and z2 < 0 then and z2 < 0 then
@ -367,10 +397,12 @@ minetest.register_on_generated(function(minp, maxp, seed)
local forest_possible = maxp.y > f_h_min and minp.y < f_h_max local forest_possible = maxp.y > f_h_min and minp.y < f_h_max
--local pmap_f_bottom = minetest.get_perlin_map(perlins.forest_bottom, map_lengths_xyz):get2dMap_flat({x=minp.x, y=minp.z}) --local pmap_f_bottom = minetest.get_perlin_map(perlins.forest_bottom, map_lengths_xyz):get2dMap_flat({x=minp.x, y=minp.z})
local perlin_f_bottom, pmap_f_top local perlin_f_bottom, pmap_f_top, strassx, strassz
if forest_possible then if forest_possible then
perlin_f_bottom = minetest.get_perlin(11, 3, 0.8, tmp2) perlin_f_bottom = minetest.get_perlin(11, 3, 0.8, tmp2)
pmap_f_top = minetest.get_perlin_map(perlins.forest_top, map_lengths_xyz):get2dMap_flat({x=minp.x, y=minp.z}) pmap_f_top = minetest.get_perlin_map(perlins.forest_top, map_lengths_xyz):get2dMap_flat({x=minp.x, y=minp.z})
strassx = get_ws_list(2, minp.x)
strassz = get_ws_list(2, minp.z)
end end
local num2, tab2 local num2, tab2
@ -449,8 +481,8 @@ minetest.register_on_generated(function(minp, maxp, seed)
if not f_perlins[pstr] then if not f_perlins[pstr] then
f_perlins[pstr] = math.floor(f_h_min+(math.abs(perlin_f_bottom:get2d({x=p.x, y=p.z})+1))*f_yscale_bottom+0.5) f_perlins[pstr] = math.floor(f_h_min+(math.abs(perlin_f_bottom:get2d({x=p.x, y=p.z})+1))*f_yscale_bottom+0.5)
end end
f_top = math.floor(f_h_max - (pmap_f_top[count]+1)*f_yscale_top + 0.5)
f_bottom = f_perlins[pstr]+math.random(0,f_bottom_scale-1) f_bottom = f_perlins[pstr]+math.random(0,f_bottom_scale-1)
f_top = math.floor(f_h_max-(pmap_f_top[count]+1)*f_yscale_top+0.5)
is_forest = f_bottom < f_top is_forest = f_bottom < f_top
f_h_dirt = f_bottom-pr:next(0,1) f_h_dirt = f_bottom-pr:next(0,1)
end end
@ -510,6 +542,18 @@ minetest.register_on_generated(function(minp, maxp, seed)
) then ) then
data[p_addpos] = c.air data[p_addpos] = c.air
end end
elseif is_forest
and y == f_top then
local sel = math.floor(strassx[x]+strassz[z]+0.5)%10
if sel <= 5 then
data[p_addpos] = return_nether_ore(d_p_addp, true)
elseif sel == 6 then
data[p_addpos] = c.netherrack_black
elseif sel == 7 then
data[p_addpos] = c.glowstone
else
data[p_addpos] = c.air
end
elseif y <= NETHER_BOTTOM then elseif y <= NETHER_BOTTOM then
if y <= bottom then if y <= bottom then