102 lines
2.2 KiB
Lua
102 lines
2.2 KiB
Lua
-- Parameters
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local TERSCA = 96
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local YFLOATCEN = 512
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local YSURFMAX = 256
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local YSURFCEN = 0
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local YSURFMIN = -256
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local YUNDERCEN = -512
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local YWAT = 1
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local YLAVA = YUNDERCEN - TERSCA / 4
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-- Noise parameters
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-- 3D noise
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local np_terrain = {
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offset = 0,
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scale = 1,
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spread = {x=384, y=192, z=384},
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seed = 5900033,
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octaves = 5,
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persist = 0.63,
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lacunarity = 2.0,
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--flags = ""
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}
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-- Initialize noise objects to nil
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local nobj_terrain = nil
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-- On generated function
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minetest.register_on_generated(function(minp, maxp, seed)
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local x1 = maxp.x
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local y1 = maxp.y
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local z1 = maxp.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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print ("chunk minp ("..x0.." "..y0.." "..z0..")")
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local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
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local area = VoxelArea:new{MinEdge=emin, MaxEdge=emax}
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local data = vm:get_data()
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local c_stone = minetest.get_content_id("default:stone")
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local c_water = minetest.get_content_id("default:water_source")
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local c_lava = minetest.get_content_id("default:lava_source")
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local sidelen = x1 - x0 + 1
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local chulens3d = {x=sidelen, y=sidelen, z=sidelen}
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local minpos3d = {x=x0, y=y0, z=z0}
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local nobj_terrain = nobj_terrain or minetest.get_perlin_map(np_terrain, chulens3d)
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local nvals_terrain = nobj_terrain:get3dMap_flat(minpos3d)
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local ni3d = 1
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for z = z0, z1 do
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for y = y0, y1 do
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local vi = area:index(x0, y, z)
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for x = x0, x1 do
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local n_terrain = nvals_terrain[ni3d]
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local grad
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if y > YFLOATCEN then
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grad = (YFLOATCEN - y) / TERSCA
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elseif y > YSURFMAX and y <= YFLOATCEN then
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grad = (y - YFLOATCEN) / TERSCA
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elseif y >= YSURFMIN and y <= YSURFMAX then
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grad = (YSURFCEN - y) / TERSCA
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elseif y >= YUNDERCEN and y < YSURFMIN then
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grad = (y - YUNDERCEN) / TERSCA
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elseif y < YUNDERCEN then
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grad = (YUNDERCEN - y) / TERSCA
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end
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local density = n_terrain + grad
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if density > 0 then
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data[vi] = c_stone
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elseif y > YSURFMIN and y <= YWAT then
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data[vi] = c_water
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elseif y <= YLAVA then
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data[vi] = c_lava
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end
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ni3d = ni3d + 1
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vi = vi + 1
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end
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end
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end
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vm:set_data(data)
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vm:set_lighting({day=0, night=0})
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vm:calc_lighting()
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vm:write_to_map(data)
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vm:update_liquids()
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end)
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