116 lines
2.9 KiB
Lua
116 lines
2.9 KiB
Lua
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--nothing--
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local grass = "nc_terrain:dirt_with_grass"
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local dirt = "nc_terrain:dirt"
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local stone = "nc_terrain:stone"
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local queue = {}
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minetest.register_globalstep(function(dt)
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for f,_ in pairs(queue) do
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if not coroutine.resume(f) then
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queue[f]=nil
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end
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end
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end)
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local function maxval(octaves,persistence,scale)
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local m = scale
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local poc = scale
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if octaves > 1 then
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for n=2,octaves do
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poc = poc*persistence
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m=m+poc
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end
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end
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return m
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end
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local function island(pos,r)
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minetest.after(2,function()--queue[coroutine.create(function()
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local noise = PerlinNoise({
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seed = math.random(10000),
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octaves = 3,
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spread = {x=r/2,y=r/2,z=r/2},
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lacunarity = 2,
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persistence = 0.5,
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flags = "absvalue"
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})
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local n = 0
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local c = 0
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local cm = (r*2+1)^3
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local function geto(x,y,z)
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local dist = (x*x+y*y+z*z)^0.5
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local uvdist = (y+r)/(r*2)
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local hdist = (x*x+z*z)^0.5
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local uhdist = (math.max(0,r-hdist)/r)^((1-uvdist)^3*5)
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local udist = math.max(0,r-dist)/r
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if math.min(1,math.max(0,uhdist^2)) ~= uhdist^2 then
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print(uhdist^2)
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end
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local m = ((math.max(r-(hdist),0)/r)^0.1*(uhdist^2))-uhdist*uvdist^3
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return m
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end
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for x=-r,r do
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for z=-r,r do
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for y=-r,r do
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local xx,yy,zz = pos.x+x,pos.y+y,pos.z+z
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o,o2 = geto(x,y,z),geto(x,y+1,z)
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local oc = (o > 0.4)
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local oc2 = o2 > 0.4
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local og = (o > 0.6)
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if oc then
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n=n+1
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local nam = dirt
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if not og and not oc2 then
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nam = grass
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end
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if og then
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nam = stone
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end
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minetest.set_node({x=xx,y=yy,z=zz},{name=nam})
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else
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n=n+0.01
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end
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if n > 1000 then
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n=0
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--coroutine.yield()
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end
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end
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end
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end
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minetest.set_node({x=pos.x,y=pos.y+10,z=pos.z},{name="nc_tree:eggcorn_planted"})
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end)--end)] = true
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end
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local f = math.floor
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local function spawn_island(name,pos)
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local ref = minetest.get_player_by_name(name)
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pos = {x=f(pos.x),y=f(pos.y),z=f(pos.z)}
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island(pos,16,name)
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ref:set_pos({x=pos.x,y=pos.y+30,z=pos.z})
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end
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local store = minetest.get_mod_storage()
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local function pid(x,z)
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return "i"..x.."_"..z
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end
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local function checkpos(x,z)
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if store:get_string(pid(x,z)) == "" then
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return true
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end
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end
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local function gen_island_pos(name)
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local x,z = 0,0
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local ok = checkpos(x,z)
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while not ok do
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x,z = x+math.random(-1,1),z+math.random(-1,1)
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ok = checkpos(x,z)
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end
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store:set_string(pid(x,z),name)
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spawn_island(name,{x=x*128,y=256,z=z*128})
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return pid(x,z)
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end
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minetest.register_on_joinplayer(function(ref)
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local meta = ref:get_meta()
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local name = ref:get_player_name()
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if meta:get_string("island") == "" then
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meta:set_string("island",gen_island_pos(name))
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end
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end)
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