96 lines
2.9 KiB
Lua
96 lines
2.9 KiB
Lua
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-- meru 0.1.0 by paramat.
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-- License WTFPL, see license.txt.
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-- Editable parameters.
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local MERU = false
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local MERUX = 0 -- Approximate centre, will be rounded to nearest chunk.
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local MERUZ = 272
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local VGRAD = 448 -- 448 -- Vertical noise gradient. Height is approx twice this.
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local HGRAD = 24 -- 24 -- Horizontal noise gradient. Radius is approx twice this.
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local CAVOFF = 0.8 -- 0.8 -- Cave noise offset.
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local DEBUG = true
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local SEEDDIFF1 = 4689 -- 3D noise for surface generation
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local OCTAVES1 = 5 -- 5
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local PERSISTENCE1 = 0.53 -- 0.53
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local SCALE1 = 64 -- 64
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local SEEDDIFF2 = 9294 -- 3D noise for caves.
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local OCTAVES2 = 2 -- 2
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local PERSISTENCE2 = 0.5 -- 0.5
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local SCALE2 = 8 -- 8
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-- End of editable parameters.
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local SEEDDIFF3 = 9130 -- 9130 -- Values must match minetest mapgen desert perlin.
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local OCTAVES3 = 3 -- 3
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local PERSISTENCE3 = 0.5 -- 0.5
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local SCALE3 = 250 -- 250
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-- Stuff.
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meru = {}
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local meruxq = (80 * math.floor((MERUX + 32) / 80)) - 32
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local meruzq = (80 * math.floor((MERUZ + 32) / 80)) - 32
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-- On generated function.
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if MERU then
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minetest.register_on_generated(function(minp, maxp, seed)
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if (minp.x == meruxq or minp.x == meruxq - 80)
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and (minp.z == meruzq or minp.z == meruzq - 80)
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and minp.y >= -32 and minp.y <= 928 then
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local env = minetest.env
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local perlin1 = env:get_perlin(SEEDDIFF1, OCTAVES1, PERSISTENCE1, SCALE1)
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local perlin2 = env:get_perlin(SEEDDIFF2, OCTAVES2, PERSISTENCE2, SCALE2)
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local perlin3 = env:get_perlin(SEEDDIFF3, OCTAVES3, PERSISTENCE3, SCALE3)
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local xl = maxp.x - minp.x
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local yl = maxp.y - minp.y
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local zl = maxp.z - minp.z
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local x0 = minp.x
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local y0 = minp.y
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local z0 = minp.z
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-- Loop through nodes in chunk.
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for i = 0, xl do
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-- For each plane do.
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if DEBUG then
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print ("[meru] Plane "..i.." Chunk ("..minp.x.." "..minp.y.." "..minp.z..")")
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end
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for k = 0, zl do
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-- For each column do.
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local x = x0 + i
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local z = z0 + k
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local noise3 = perlin3:get2d({x=x+150,y=z+50}) -- Offsets must match minetest mapgen desert perlin.
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local desert = false
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if noise3 > 0.45 or math.random(0,10) > (0.45 - noise3) * 100 then -- Smooth transition 0.35 to 0.45.
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desert = true
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end
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for j = 0, yl do
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-- For each node do.
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local y = y0 + j
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local noise1 = perlin1:get3d({x=x,y=y,z=z})
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local radius = ((x - meruxq) ^ 2 + (z - meruzq) ^ 2) ^ 0.5
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local offset = - y / VGRAD - radius / HGRAD
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local noise1off = noise1 + offset + 2
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if noise1off > 0 and noise1off < 1 then
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local noise2 = perlin2:get3d({x=x,y=y,z=z})
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if noise2 - noise1off / 2 + CAVOFF > 0 then
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if desert then
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env:add_node({x=x,y=y,z=z},{name="default:desert_stone"})
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else
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env:add_node({x=x,y=y,z=z},{name="default: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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end
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end
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if DEBUG then
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print ("[meru] Completed")
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end
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end
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end)
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end
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