mtcontrib/minetest-mod-snow
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do not recreate perlin noise objects in every mapchunk

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M  src/mapgen_v6.lua
This commit is contained in:
HybridDog 2016-09-17 11:38:38 +02:00
parent 48db038755
commit 9d657246c9
1 changed files with 18 additions and 5 deletions
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23
src/mapgen_v6.lua
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@ -172,6 +172,20 @@ snow.register_on_configuring(function(name, v)
end end
end) end)
local perlin_objs, perlins_chulen
local function get_perlins(sidelen)
if perlins_chulen == sidelen then
return
end
perlins_chulen = sidelen
local chulens = {x=sidelen, y=sidelen, z=sidelen}
perlin_objs = {
default = minetest.get_perlin_map(np_default, chulens),
cold = minetest.get_perlin_map(np_cold, chulens),
ice = minetest.get_perlin_map(np_ice, chulens),
}
end
minetest.register_on_generated(function(minp, maxp, seed) minetest.register_on_generated(function(minp, maxp, seed)
local t1 = os.clock() local t1 = os.clock()
@ -194,9 +208,8 @@ minetest.register_on_generated(function(minp, maxp, seed)
local snow_tab,num = {},1 local snow_tab,num = {},1
local pines_tab,pnum = {},1 local pines_tab,pnum = {},1
local sidelen = x1 - x0 + 1 get_perlins(x1 - x0 + 1)
local chulens = {x=sidelen, y=sidelen, z=sidelen} local nvals_default = perlin_objs.default:get2dMap_flat{x=x0+150, y=z0+50}
local nvals_default = minetest.get_perlin_map(np_default, chulens):get2dMap_flat{x=x0+150, y=z0+50}
local nvals_cold, nvals_ice, ndia local nvals_cold, nvals_ice, ndia
-- Choose biomes -- Choose biomes
@ -224,7 +237,7 @@ minetest.register_on_generated(function(minp, maxp, seed)
local test local test
if nvals_default[ni] < 0.35 then if nvals_default[ni] < 0.35 then
if not nvals_cold then if not nvals_cold then
nvals_cold = minetest.get_perlin_map(np_cold, chulens):get2dMap_flat{x=x0, y=z0} nvals_cold = perlin_objs.cold:get2dMap_flat{x=x0, y=z0}
end end
test = math.min(nvals_cold[ni], 1) test = math.min(nvals_cold[ni], 1)
if smooth then if smooth then
@ -278,7 +291,7 @@ minetest.register_on_generated(function(minp, maxp, seed)
else else
nodes_added = true nodes_added = true
write_to_map = true write_to_map = true
nvals_ice = nvals_ice or minetest.get_perlin_map(np_ice, chulens):get2dMap_flat{x=x0, y=z0} nvals_ice = nvals_ice or perlin_objs.ice:get2dMap_flat{x=x0, y=z0}
local icetype = nvals_ice[ni] local icetype = nvals_ice[ni]
local cool = icetype > 0 -- only spawns ice on edge of water local cool = icetype > 0 -- only spawns ice on edge of water
local icebergs = icetype > -0.2 and icetype <= 0 local icebergs = icetype > -0.2 and icetype <= 0