forked from mtcontrib/nether-pack
93 lines
2.1 KiB
Lua
93 lines
2.1 KiB
Lua
--V2
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local function get_random(a, b, seed)
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return PseudoRandom(math.abs(a+b*5)+seed)
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end
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local r_chs = {}
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function nether_weird_noise(minp, fct, s, seed, range)
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if not r_chs[s] then
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r_chs[s] = math.floor(s/3+0.5)
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end
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local r_ch = r_chs[s]
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local maxp = vector.add(minp, 16)
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local tab,n = {},1
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local sm = range or (s+r_ch)*2
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for z = -sm, 16+sm do
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local pz = z+minp.z
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if pz%s == 0 then
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for x = -sm, 16+sm do
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local px = x+minp.x
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if px%s == 0 then
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local pr = get_random(px, pz, seed)
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tab[n] = {x=px+pr:next(-r_ch, r_ch), y=0, z=pz+pr:next(-r_ch, r_ch)}
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n = n+1
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end
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end
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end
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end
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local tab2,n = {},1
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for z = minp.z, maxp.z do
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for x = minp.x, maxp.x do
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local h = sm
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for _,i in ipairs(tab) do
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--local dist = vector.distance(i, {x=x, y=0, z=z})
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h = math.min(h, fct(x, i.x, z, i.z))
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end
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tab2[n] = {x=x, y=maxp.y-h, z=z}
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n = n+1
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end
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end
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return tab2
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end
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--[[
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local function dif(z1, z2)
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if z1 < 0
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and z2 < 0 then
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z1,z2 = -z1,-z2
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end
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return math.abs(z1-z2)
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end
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local function pymg(x1, x2, z1, z2)
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return math.max(dif(x1, x2), dif(z1, z2))
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end
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local function romg(x1, x2, z1, z2)
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return math.hypot(dif(x1, x2), dif(z1, z2))
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end
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local function py2mg(x1, x2, z1, z2)
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return dif(x1, x2) + dif(z1, z2)
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end
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minetest.register_node("ac:wmg", {
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description = "wmg",
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tiles = {"ac_block.png"},
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groups = {snappy=1,bendy=2,cracky=1},
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sounds = default_stone_sounds,
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on_construct = function(pos)
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local minp = vector.chunkcorner(pos)
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for _,p in ipairs(weird_noise(minp, pymg, 20, 8, 4)) do
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local p2 = {x=p.x, y=p.y+1, z=p.z}
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if p.y <= minp.y+7 then
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local p2 = {x=p.x, y=minp.y+6, z=p.z}
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local p3 = {x=p.x, y=p2.y+1, z=p.z}
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if minetest.get_node(p2).name ~= "default:desert_stone" then
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minetest.set_node(p2, {name="default:desert_stone"})
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end
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if minetest.get_node(p3).name ~= "default:desert_sand" then
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minetest.set_node(p3, {name="default:desert_sand"})
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end
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else
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if minetest.get_node(p).name ~= "default:desert_stone" then
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minetest.set_node(p, {name="default:desert_stone"})
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end
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end
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end
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end,
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})]]
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