Finish initial refactor design
parent
78fea8405c
commit
851cb19cd2
207
init.lua
207
init.lua
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@ -7,7 +7,7 @@ dofile(modpath.."/lua/timer.lua")
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-- Local variables used for programming
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-- Local variables used for programming
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local internal =
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local internal =
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{ a = 0
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{ a = nil
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-- Average size of a cave biome
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-- Average size of a cave biome
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, biome_size = { x = 50, y = 50, z = 50 }
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, biome_size = { x = 50, y = 50, z = 50 }
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@ -18,6 +18,18 @@ local internal =
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-- The margin that a voxelmanip gives around the chunk being generated
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-- The margin that a voxelmanip gives around the chunk being generated
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, mapgen_buffer = 16
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, mapgen_buffer = 16
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-- Enum type used during cave generation for classifying different types
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-- of cave nodes. Do not touch unless you're changing the code
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, node_types =
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{ stick_edge = 0
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, air = 1
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, stone = 2
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, floor = 3
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, wall = 4
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, ceiling = 5
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, floor_deco = 6
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}
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-- Point that can be used for generating Voronoi graphs
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-- Point that can be used for generating Voronoi graphs
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-- The number can be anything, as long as it reasonably far away from
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-- The number can be anything, as long as it reasonably far away from
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-- the range 0 - 100
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-- the range 0 - 100
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@ -64,11 +76,12 @@ Flat3dArray.__index = Flat3dArray
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-- Please see API.md for reference
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-- Please see API.md for reference
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noordstar_caves =
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noordstar_caves =
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{ a = nil
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{ a = nil
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-- The `cave_vastness` is a variable that determines the size of caves.
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-- The `cave_vastness` is a variable that determines the size of caves.
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-- The function takes in an x, y and z variable, and returns a number between
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-- The function takes in an x, y and z variable, and returns a number
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-- 0 and 1.
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-- between 0 and 1.
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-- Low numbers mean very rare and tiny caves, while high numbers mean massive
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-- Low numbers mean very rare and tiny caves, while high numbers mean
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-- caves, with massive open spaces.
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-- massive caves, with massive open spaces.
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-- If you wish to overwrite this function, it is good to keep in mind to:
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-- If you wish to overwrite this function, it is good to keep in mind to:
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-- - Make sure that the output changes VERY SLOWLY over time
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-- - Make sure that the output changes VERY SLOWLY over time
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-- - Keep the function performant as it will be executed many, many times
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-- - Keep the function performant as it will be executed many, many times
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@ -128,6 +141,7 @@ function noordstar_caves.unregister_shape(name)
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noordstar_caves.registered_shapes[name] = nil
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noordstar_caves.registered_shapes[name] = nil
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end
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end
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-- Calculate the distance of a given biome to a given point
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-- Calculate the distance of a given biome to a given point
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function internal.biome_def_distance(def, heat, humidity)
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function internal.biome_def_distance(def, heat, humidity)
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local dx = math.abs(humidity - def.humidity_point)
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local dx = math.abs(humidity - def.humidity_point)
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@ -452,6 +466,64 @@ function internal.flat_from_cave_bools(minp, maxp)
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return bools
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return bools
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end
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end
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function internal.flat_from_node_types(bools, minp, maxp)
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local nt = internal.node_types
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-- local bools = internal.flat_from_cave_bools(minp, maxp)
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local node_types = Flat3dArray:from_func(minp, maxp, function (i, pos)
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-- Simplify calculation by ignoring edges
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if pos.x == minp.x or pos.x == maxp.x then
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return nt.stick_edge
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elseif pos.y == minp.y or pos.y == maxp.y then
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return nt.stick_edge
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elseif pos.z == maxp.z or pos.z == minp.z then
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return nt.stick_edge
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end
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if bools:get_index(i) then
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-- PART OF CAVE
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if bools:get_index(i + bools.down) == false then
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-- Block is right on the floor
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return nt.floor_deco
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end
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return nt.air
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else
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-- NOT PART OF CAVE
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-- Floor
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if bools:get_index(i + bools.up) then
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return nt.floor
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end
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-- Ceiling
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if bools:get_index(i + bools.down) then
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return nt.ceiling
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end
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-- Walls
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if bools:get_index(i + bools.north) then
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return nt.wall
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end
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if bools:get_index(i + bools.east) then
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return nt.wall
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end
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if bools:get_index(i + bools.south) then
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return nt.wall
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end
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if bools:get_index(i + bools.west) then
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return nt.wall
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end
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return nt.stone
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end
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end)
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return node_types
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end
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-- Get a Flat3dArray using noise_params
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-- Get a Flat3dArray using noise_params
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function internal.flat_from_noise_params(noise_params, minp, maxp)
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function internal.flat_from_noise_params(noise_params, minp, maxp)
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local nx = maxp.x - minp.x + 1
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local nx = maxp.x - minp.x + 1
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@ -501,6 +573,105 @@ function internal.from_3d_to_flat(dx, dy, dz, nx, ny)
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return (nx * ny * dz) + (nx * dy) + dx + 1
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return (nx * ny * dz) + (nx * dy) + dx + 1
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end
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end
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-- Generate caves given a voxelmanip array
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function internal.generate_caves(data, minp, maxp)
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-- Increased voxelmanip size
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local vminp =
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{ x = minp.x - internal.mapgen_buffer
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, y = minp.y - internal.mapgen_buffer
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, z = minp.z - internal.mapgen_buffer
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}
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local vmaxp =
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{ x = maxp.x + internal.mapgen_buffer
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, y = maxp.y + internal.mapgen_buffer
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, z = maxp.z + internal.mapgen_buffer
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}
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-- Increased node type size to account for unknown edges
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local bminp =
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{ x = minp.x - 1
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, y = minp.y - 1
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, z = minp.z - 1
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}
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local bmaxp =
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{ x = maxp.x + 1
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, y = maxp.y + 1
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, z = maxp.z + 1
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}
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-- Load data
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local vmanip = Flat3dArray:new(vminp, vmaxp, data)
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-- Get cave bools
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local bools = internal.flat_from_cave_bools(bminp, bmaxp)
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-- Get node types
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local nts = internal.flat_from_node_types(bools, bminp, bmaxp)
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-- Calculate biome heat & humidity
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local heat_points = internal.flat_from_noise_params(
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internal.heat_noise_params(), bminp, bmaxp
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)
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local humidity_points = internal.flat_from_noise_params(
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internal.humidity_noise_params(), bminp, bmaxp
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)
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-- Place blocks where necessary
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internal.iter_3d_area(bminp, bmaxp, function (i, pos)
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local function place(name)
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if type(name) == "string" then
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vmanip:set_index(
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vmanip:pos_to_index(pos),
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minetest.get_content_id(name)
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)
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elseif type(name) == "nil" then
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else
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error("Inserted invalid type " .. type(name) .. " into voxelmanip array")
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end
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end
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local nt = nts:get_index(i)
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if nt == internal.node_types.stone then
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elseif nt == internal.node_types.stick_edge then
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elseif nt == internal.node_types.air then
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place("air")
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elseif nt == internal.node_types.floor_deco then
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-- TODO: Place registered decoration
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else
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-- Find appropriate biome
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local heat = heat_points:get_index(i)
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local humidity = humidity_points:get_index(i)
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local name = internal.closest_cave_biome(heat, humidity)
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local def = noordstar_caves.registered_biomes[name] or internal.default_biome()
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if nt == internal.node_types.floor then
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place(def.node_floor)
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elseif nt == internal.node_types.wall then
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place(def.node_wall)
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elseif nt == internal.node_types.ceiling then
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place(def.node_roof)
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else
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error(
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table.concat(
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{ "Found unknown node type "
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, nt
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, " (type "
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, type(nt)
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, ")"
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}
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, ""
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)
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)
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end
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end
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end)
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return vmanip.arr
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end
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-- Get the noise params for the cave biome temperature.
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-- Get the noise params for the cave biome temperature.
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function internal.heat_noise_params()
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function internal.heat_noise_params()
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return {
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return {
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@ -599,6 +770,11 @@ function internal.iter_3d_area(minp, maxp, callback)
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end
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end
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end
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end
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-- -- Log text to the Minetest chat
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-- function internal.log(text)
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-- minetest.chat_send_all(os.time() .. " - " .. text)
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-- end
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-- Helper function to convert a set of coordinates to a readable string
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-- Helper function to convert a set of coordinates to a readable string
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function internal.pos_to_str(pos)
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function internal.pos_to_str(pos)
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return "(" .. pos.x .. ", " .. pos.y .. ", " .. pos.z .. " )"
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return "(" .. pos.x .. ", " .. pos.y .. ", " .. pos.z .. " )"
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@ -698,6 +874,7 @@ function internal.within_bounds(pos, minp, maxp)
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return false
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return false
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end
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end
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-- Create a new flat 3d array based on a function callback that gets the index
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-- Create a new flat 3d array based on a function callback that gets the index
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-- and position as inputs
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-- and position as inputs
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function Flat3dArray:from_func(minp, maxp, callback)
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function Flat3dArray:from_func(minp, maxp, callback)
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@ -813,6 +990,26 @@ function Flat3dArray:validate_pos(pos)
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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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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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minetest.register_on_generated(function(minp, maxp, blockseed)
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local vm = minetest.get_mapgen_object("voxelmanip")
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local data = vm:get_data()
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data = internal.generate_caves(data, minp, maxp)
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vm:set_data(data)
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vm:write_to_map()
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end)
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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578
lua/engine.lua
578
lua/engine.lua
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@ -1,578 +0,0 @@
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-- Constants and magic numbers
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local mapgen_buffer = 16
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-- Cave biome range
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local biome_spread_range = 50
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-- Noise params for heat_point
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local heat_noise_params =
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{ offset = 50
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, scale = 50
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, spread = { x = biome_spread_range, y = biome_spread_range, z = biome_spread_range }
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, seed = 320523
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, octaves = 2
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, persistence = 0.1
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, lacunarity = 2.0
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, flags = ""
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}
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-- Noise params for humidity_point
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local humidity_noise_params =
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{ offset = 50
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, scale = 50
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, spread = { x = biome_spread_range, y = biome_spread_range, z = biome_spread_range }
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, seed = 9923473
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, octaves = 2
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, persistence = 0.1
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, lacunarity = 2.0
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, flags = ""
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}
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local default_biome =
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{ name = "noordstar_caves:none"
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, heat_point = -1e6
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, humidity_point = -1e6
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, minp = { x = -1e5, y = -1e5, z = -1e5 }
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, maxp = { x = 1e5, y = 1e5, z = 1e5 }
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}
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local cave_shape_chunk_size = 8
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local cluster_shape_chunks_x = 4
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local cluster_shape_chunks_y = 6
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local cluster_shape_chunks_z = 4
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local function reduced_pos(pos)
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return
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{ x = math.floor(pos.x / (cave_shape_chunk_size * cluster_shape_chunks_x))
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, y = math.floor(pos.y / (cave_shape_chunk_size * cluster_shape_chunks_y))
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, z = math.floor(pos.z / (cave_shape_chunk_size * cluster_shape_chunks_z))
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}
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end
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-- Convert 3d relative coordinates to an index on a flat array
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local function from_3d_to_flat(dx, dy, dz, nx, ny)
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return (nx * ny * dz) + (nx * dy) + dx + 1
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end
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-- Convert an index on a flat array to 3d relative coordinates
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local function from_flat_to_3d(i, nx, ny)
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return {
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dx = (i - 1) % nx,
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dy = math.floor((i - 1) / nx) % ny,
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dz = math.floor((i - 1) / (nx * ny))
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}
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end
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-- Iterate over a 3d area, both indexing by the index and the ansolute position
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local function iter_3d_area(minp, maxp, callback)
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local nx = maxp.x - minp.x + 1
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local ny = maxp.y - minp.y + 1
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local nz = maxp.z - minp.z + 1
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for i = 1, nx * ny * nz do
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local dpos = from_flat_to_3d(i, nx, ny)
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local pos = {
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x = minp.x + dpos.dx,
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y = minp.y + dpos.dy,
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z = minp.z + dpos.dz,
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}
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callback(i, pos)
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end
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end
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-- Helper function to convert a set of coordinates to a readable string
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local function pos_to_str(pos)
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return "(" .. pos.x .. ", " .. pos.y .. ", " .. pos.z .. " )"
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end
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local Flat3dArray = {}
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Flat3dArray.__index = Flat3dArray
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function Flat3dArray:new(minp, maxp, arr)
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local instance = {}
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setmetatable(instance, Flat3dArray)
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local nx = maxp.x - minp.x + 1
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local ny = maxp.y - minp.y + 1
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|
||||||
local nz = maxp.z - minp.z + 1
|
|
||||||
|
|
||||||
if #arr ~= nx * ny * nz then
|
|
||||||
error(
|
|
||||||
"Input array doesn't match dimension lengths: " .. nx .. " x " ..
|
|
||||||
ny .. " x " .. nz .. " = " .. (nx*ny*nz) .. ", but found " .. #arr
|
|
||||||
)
|
|
||||||
end
|
|
||||||
|
|
||||||
instance.nx = nx
|
|
||||||
instance.ny = ny
|
|
||||||
instance.nz = nz
|
|
||||||
instance.minp = minp
|
|
||||||
instance.maxp = maxp
|
|
||||||
instance.arr = arr
|
|
||||||
|
|
||||||
return instance
|
|
||||||
end
|
|
||||||
|
|
||||||
function Flat3dArray:from_func(minp, maxp, callback)
|
|
||||||
local arr = {}
|
|
||||||
|
|
||||||
iter_3d_area(minp, maxp, function (i, pos)
|
|
||||||
arr[i] = callback(i, pos)
|
|
||||||
end)
|
|
||||||
|
|
||||||
return self:new(minp, maxp, arr)
|
|
||||||
end
|
|
||||||
|
|
||||||
function Flat3dArray:get_index(i)
|
|
||||||
local out = self.arr[i]
|
|
||||||
if out == nil then
|
|
||||||
error(
|
|
||||||
"Index " .. i .. " not found in array of length " .. #self.arr
|
|
||||||
)
|
|
||||||
end
|
|
||||||
return out
|
|
||||||
end
|
|
||||||
|
|
||||||
function Flat3dArray:get_pos(pos)
|
|
||||||
self:validate_pos(pos)
|
|
||||||
|
|
||||||
local dx = pos.x - self.minp.x
|
|
||||||
local dy = pos.y - self.minp.y
|
|
||||||
local dz = pos.z - self.minp.z
|
|
||||||
|
|
||||||
return self:get_index(from_3d_to_flat(dx, dy, dz, self.nx, self.ny))
|
|
||||||
end
|
|
||||||
|
|
||||||
local function is_valid_pos(pos, minp, maxp)
|
|
||||||
if pos.x < minp.x then
|
|
||||||
return false
|
|
||||||
elseif pos.x > maxp.x then
|
|
||||||
return false
|
|
||||||
elseif pos.y < minp.y then
|
|
||||||
return false
|
|
||||||
elseif pos.y > maxp.y then
|
|
||||||
return false
|
|
||||||
elseif pos.z < minp.z then
|
|
||||||
return false
|
|
||||||
elseif pos.z > maxp.z then
|
|
||||||
return false
|
|
||||||
else
|
|
||||||
return true
|
|
||||||
end
|
|
||||||
end
|
|
||||||
|
|
||||||
function Flat3dArray:valid_pos(pos)
|
|
||||||
return is_valid_pos(pos, self.minp, self.maxp)
|
|
||||||
end
|
|
||||||
|
|
||||||
function Flat3dArray:validate_pos(pos)
|
|
||||||
if not self:valid_pos(pos) then
|
|
||||||
error(
|
|
||||||
table.concat(
|
|
||||||
{ "Position "
|
|
||||||
, pos_to_str(pos)
|
|
||||||
, " out of bounds from minp = "
|
|
||||||
, pos_to_str(self.minp)
|
|
||||||
, ", maxp = "
|
|
||||||
, pos_to_str(self.maxp)
|
|
||||||
},
|
|
||||||
""
|
|
||||||
)
|
|
||||||
)
|
|
||||||
end
|
|
||||||
end
|
|
||||||
|
|
||||||
-- Get an enhanced function from the def function that warns us when the
|
|
||||||
-- function does not behave properly
|
|
||||||
local function enhanced_func(def)
|
|
||||||
if type(def.name) ~= "string" then
|
|
||||||
error("Invalid nameless shape definition")
|
|
||||||
elseif type(def.func) ~= "function" then
|
|
||||||
error(
|
|
||||||
"Invalid shape definition misses an adjustment function"
|
|
||||||
)
|
|
||||||
else
|
|
||||||
return function(pos, n)
|
|
||||||
local out = def.func(pos, n)
|
|
||||||
|
|
||||||
if type(out) == "number" then
|
|
||||||
return out
|
|
||||||
elseif n == nil then
|
|
||||||
error(
|
|
||||||
"Shape " .. def.name .. " function must return a number. The input `n` was nil. Perhaps your `noise_params` field is invalid?"
|
|
||||||
)
|
|
||||||
else
|
|
||||||
error("Shape " .. def.name .. " function must return a number.")
|
|
||||||
end
|
|
||||||
end
|
|
||||||
end
|
|
||||||
end
|
|
||||||
|
|
||||||
-- Get a flat array of cave shape noise values from a given cave shape def
|
|
||||||
local function get_flat_from_shape_def(def, minp, maxp)
|
|
||||||
local f = enhanced_func(def)
|
|
||||||
|
|
||||||
local nx = maxp.x - minp.x + 1
|
|
||||||
local ny = maxp.y - minp.y + 1
|
|
||||||
local nz = maxp.z - minp.z + 1
|
|
||||||
|
|
||||||
local noise_flat_map = {}
|
|
||||||
|
|
||||||
-- If noise parameters have been defined, fill the table with noise
|
|
||||||
-- If not, all values remain nil
|
|
||||||
if def.noise_params ~= nil then
|
|
||||||
local p = PerlinNoiseMap(def.noise_params, { x = nx, y = ny, z = nz })
|
|
||||||
|
|
||||||
if nz == 1 then
|
|
||||||
p:get_2d_map_flat(minp, noise_flat_map)
|
|
||||||
else
|
|
||||||
p:get_3d_map_flat(minp, noise_flat_map)
|
|
||||||
end
|
|
||||||
end
|
|
||||||
|
|
||||||
iter_3d_area(minp, maxp, function(i, pos)
|
|
||||||
noise_flat_map[i] = f(pos, noise_flat_map[i])
|
|
||||||
end)
|
|
||||||
|
|
||||||
return Flat3dArray:new(minp, maxp, noise_flat_map)
|
|
||||||
end
|
|
||||||
|
|
||||||
local function get_flat_from_noise_params(minp, maxp, noise_params)
|
|
||||||
local nx = maxp.x - minp.x + 1
|
|
||||||
local ny = maxp.y - minp.y + 1
|
|
||||||
local nz = maxp.z - minp.z + 1
|
|
||||||
|
|
||||||
local buffer = {}
|
|
||||||
|
|
||||||
local p = PerlinNoiseMap(noise_params, { x = nx, y = ny, z = nz })
|
|
||||||
|
|
||||||
if nz == 1 then
|
|
||||||
p:get_2d_map_flat(minp, buffer)
|
|
||||||
else
|
|
||||||
p:get_3d_map_flat(minp, buffer)
|
|
||||||
end
|
|
||||||
|
|
||||||
return Flat3dArray:new(minp, maxp, buffer)
|
|
||||||
end
|
|
||||||
|
|
||||||
-- Based on the number of cave shapes, calculate how quickly connectivity is
|
|
||||||
-- meant to change
|
|
||||||
local function get_connectivity_noise_params(shape_size)
|
|
||||||
local factor = math.max(math.abs(shape_size) ^ 0.5, 1)
|
|
||||||
|
|
||||||
return {
|
|
||||||
offset = 50,
|
|
||||||
scale = 50,
|
|
||||||
spread =
|
|
||||||
reduced_pos(
|
|
||||||
{ x = factor * 250
|
|
||||||
, y = factor * 100
|
|
||||||
, z = factor * 250
|
|
||||||
}
|
|
||||||
),
|
|
||||||
seed = 297948,
|
|
||||||
octaves = 2,
|
|
||||||
persistence = 0.2,
|
|
||||||
lacunarity = 2.0,
|
|
||||||
flags = "eased"
|
|
||||||
}
|
|
||||||
end
|
|
||||||
|
|
||||||
-- Based on the number of cave shapes, calculate how quickly verticality is
|
|
||||||
-- meant to change
|
|
||||||
local function get_verticality_noise_params(shape_size)
|
|
||||||
local factor = math.max(math.abs(shape_size) ^ 0.5, 1)
|
|
||||||
|
|
||||||
return {
|
|
||||||
offset = 50,
|
|
||||||
scale = 50,
|
|
||||||
spread =
|
|
||||||
reduced_pos(
|
|
||||||
{ x = factor * 100
|
|
||||||
, y = factor * 250
|
|
||||||
, z = factor * 100
|
|
||||||
}
|
|
||||||
),
|
|
||||||
seed = 35644,
|
|
||||||
octaves = 2,
|
|
||||||
persistence = 0.2,
|
|
||||||
lacunarity = 2.0,
|
|
||||||
flags = "eased"
|
|
||||||
}
|
|
||||||
end
|
|
||||||
|
|
||||||
-- Get whether a cave shape is within distance.
|
|
||||||
local function shape_within_distance(shape_size, dx, dy)
|
|
||||||
local factor = math.max(math.abs(shape_size) ^ 0.5, 1)
|
|
||||||
local max_distance = 30 / factor
|
|
||||||
|
|
||||||
return dx^2 + dy^2 <= max_distance^2
|
|
||||||
end
|
|
||||||
|
|
||||||
local function shape_def_distance(def, x, y)
|
|
||||||
local dx = math.abs(x - def.connectivity_point)
|
|
||||||
local dy = math.abs(y - def.verticality_point)
|
|
||||||
|
|
||||||
return dx^2 + dy^2
|
|
||||||
end
|
|
||||||
|
|
||||||
-- Get a flat map containing all flat threshold values
|
|
||||||
local function get_threshold_flat(minp, maxp)
|
|
||||||
local connectivity = get_flat_from_noise_params(
|
|
||||||
reduced_pos(minp), reduced_pos(maxp),
|
|
||||||
get_connectivity_noise_params(#noordstar_caves.registered_shapes)
|
|
||||||
)
|
|
||||||
|
|
||||||
local verticality = get_flat_from_noise_params(
|
|
||||||
reduced_pos(minp), reduced_pos(maxp),
|
|
||||||
get_verticality_noise_params(#noordstar_caves.registered_shapes)
|
|
||||||
)
|
|
||||||
|
|
||||||
local noise = {}
|
|
||||||
|
|
||||||
-- Get noise for all cave shapes
|
|
||||||
for key, def in pairs(noordstar_caves.registered_shapes) do
|
|
||||||
noise[key] = get_flat_from_shape_def(def, reduced_pos(minp), reduced_pos(maxp))
|
|
||||||
end
|
|
||||||
|
|
||||||
-- Create a (reduced) flat array
|
|
||||||
local reduced = Flat3dArray:from_func(
|
|
||||||
reduced_pos(minp), reduced_pos(maxp),
|
|
||||||
function(i, pos)
|
|
||||||
local x = connectivity:get_pos(pos)
|
|
||||||
local y = verticality:get_pos(pos)
|
|
||||||
|
|
||||||
local value = 0
|
|
||||||
|
|
||||||
for key, def in pairs(noordstar_caves.registered_shapes) do
|
|
||||||
local dx = math.abs(x - def.connectivity_point)
|
|
||||||
local dy = math.abs(y - def.verticality_point)
|
|
||||||
|
|
||||||
if shape_within_distance(#noordstar_caves.registered_shapes, dx, dy) then
|
|
||||||
value = math.max(value, noise[key]:get_pos(pos))
|
|
||||||
end
|
|
||||||
end
|
|
||||||
|
|
||||||
return value
|
|
||||||
end
|
|
||||||
)
|
|
||||||
|
|
||||||
-- Create the flat array
|
|
||||||
local x = Flat3dArray:from_func(minp, maxp, function(i, pos)
|
|
||||||
return reduced:get_pos(reduced_pos(pos))
|
|
||||||
end)
|
|
||||||
|
|
||||||
return x
|
|
||||||
end
|
|
||||||
|
|
||||||
|
|
||||||
-- Old minimum height for the overworld
|
|
||||||
local old_overworld_min = mcl_vars.mg_overworld_min
|
|
||||||
|
|
||||||
-- If another mod doesn't override the maximum world depth, we will assume that
|
|
||||||
-- the world depth is the following value.
|
|
||||||
local world_depth = -60
|
|
||||||
|
|
||||||
-- Otherwise, this variable can be changed using the following function,
|
|
||||||
-- which will also update all the other necessary variables
|
|
||||||
function noordstar_caves.set_world_depth(h)
|
|
||||||
-- Set world depth variable
|
|
||||||
world_depth = h
|
|
||||||
end
|
|
||||||
noordstar_caves.set_world_depth(world_depth)
|
|
||||||
|
|
||||||
-- The `cave_vastness` is a variable that determines the size of caves.
|
|
||||||
-- The function takes in an x, y and z variable, and returns a number between
|
|
||||||
-- 0 and 1.
|
|
||||||
-- Low numbers mean very rare and tiny caves, while high numbers mean massive
|
|
||||||
-- caves, with massive open spaces.
|
|
||||||
-- If you wish to overwrite this function, it is good to keep in mind to:
|
|
||||||
-- - Make sure that the output changes VERY SLOWLY over time
|
|
||||||
-- - This function will be run a LOT so it is very performance sensitive
|
|
||||||
noordstar_caves.cave_vastness = function(pos)
|
|
||||||
return pos.y / world_depth
|
|
||||||
end
|
|
||||||
|
|
||||||
-- Secretly, we're using an internal function that also adds a safe layer for
|
|
||||||
-- when we're approaching bedrock levels
|
|
||||||
local function cave_vastness(pos)
|
|
||||||
if world_depth + 20 < pos.y then
|
|
||||||
return noordstar_caves.cave_vastness(pos)
|
|
||||||
elseif world_depth + 5 < pos.y then
|
|
||||||
return noordstar_caves.cave_vastness(pos) * math.abs(pos.y - world_depth - 5) / 15
|
|
||||||
else
|
|
||||||
return 0
|
|
||||||
end
|
|
||||||
end
|
|
||||||
|
|
||||||
-- Get a flat array of nodes that are either in caves or not in caves
|
|
||||||
local function get_flat_cave_bools(minp, maxp)
|
|
||||||
local thresholds = get_threshold_flat(minp, maxp)
|
|
||||||
|
|
||||||
return Flat3dArray:from_func(minp, maxp, function(i, pos)
|
|
||||||
return thresholds:get_pos(pos) >= 1 - cave_vastness(pos)
|
|
||||||
end)
|
|
||||||
end
|
|
||||||
|
|
||||||
local node_type =
|
|
||||||
{ unknown = 1 -- Edge of a chunk
|
|
||||||
, floor = 2 -- Floor of a cave
|
|
||||||
, wall = 3 -- Side wall of a cave
|
|
||||||
, roof = 4 -- Roof of a cave
|
|
||||||
, content = 5 -- Air in the cave not adjacent to a wall, floor or roof
|
|
||||||
, stone = 6 -- Underground node not adjacent to a cave
|
|
||||||
}
|
|
||||||
|
|
||||||
local function get_flat_cave_node_types(minp, maxp)
|
|
||||||
local bools = get_flat_cave_bools(minp, maxp)
|
|
||||||
|
|
||||||
return Flat3dArray:from_func(minp, maxp, function (i, pos)
|
|
||||||
if bools:get_pos(pos) then
|
|
||||||
return node_type.content
|
|
||||||
-- Floor takes precedence
|
|
||||||
elseif pos.y == maxp.y then -- Could be floor
|
|
||||||
return node_type.unknown
|
|
||||||
elseif bools:get_pos({ x = pos.x, y = pos.y + 1, z = pos.z }) then
|
|
||||||
return node_type.floor
|
|
||||||
-- Then roof takes precedence
|
|
||||||
elseif pos.y == minp.y then -- Could be roof
|
|
||||||
return node_type.unknown
|
|
||||||
elseif bools:get_pos({ x = pos.x, y = pos.y - 1, z = pos.z }) then
|
|
||||||
return node_type.roof
|
|
||||||
else
|
|
||||||
-- Check for walls
|
|
||||||
local left = { x = pos.x - 1, y = pos.y, z = pos.z }
|
|
||||||
local right = { x = pos.x + 1, y = pos.y, z = pos.z }
|
|
||||||
local front = { x = pos.x, y = pos.y, z = pos.z - 1 }
|
|
||||||
local back = { x = pos.x, y = pos.y, z = pos.z + 1 }
|
|
||||||
|
|
||||||
-- Check if the value is near the edge
|
|
||||||
local on_edge = false
|
|
||||||
|
|
||||||
if left.x < minp.x then
|
|
||||||
on_edge = true
|
|
||||||
elseif bools:get_pos(left) then
|
|
||||||
return node_type.wall
|
|
||||||
end
|
|
||||||
if right.x > maxp.x then
|
|
||||||
on_edge = true
|
|
||||||
elseif bools:get_pos(right) then
|
|
||||||
return node_type.wall
|
|
||||||
end
|
|
||||||
if front.z < minp.z then
|
|
||||||
on_edge = true
|
|
||||||
elseif bools:get_pos(front) then
|
|
||||||
return node_type.wall
|
|
||||||
end
|
|
||||||
if back.z > maxp.z then
|
|
||||||
on_edge = true
|
|
||||||
elseif bools:get_pos(back) then
|
|
||||||
return node_type.wall
|
|
||||||
end
|
|
||||||
|
|
||||||
if on_edge then
|
|
||||||
return node_type.unknown
|
|
||||||
else
|
|
||||||
return node_type.stone
|
|
||||||
end
|
|
||||||
end
|
|
||||||
end)
|
|
||||||
end
|
|
||||||
|
|
||||||
-- Transform categorized blocks into
|
|
||||||
local function biome_def_to_content_id(def, nt, original_block)
|
|
||||||
local function get_node(name, alt)
|
|
||||||
return function()
|
|
||||||
if name == nil then
|
|
||||||
return alt
|
|
||||||
else
|
|
||||||
return minetest.get_content_id(name)
|
|
||||||
end
|
|
||||||
end
|
|
||||||
end
|
|
||||||
|
|
||||||
local node_air = get_node(def.node_air, minetest.get_content_id("air"))
|
|
||||||
local node_floor = get_node(def.node_floor, original_block)
|
|
||||||
local node_stone = get_node(nil, original_block)
|
|
||||||
local node_roof = get_node(def.node_roof, original_block)
|
|
||||||
local node_unknown = get_node(nil, original_block)
|
|
||||||
local node_wall = get_node(def.node_wall, original_block)
|
|
||||||
|
|
||||||
if nt == node_type.unknown then
|
|
||||||
return node_unknown()
|
|
||||||
elseif nt == node_type.floor then
|
|
||||||
return node_floor()
|
|
||||||
elseif nt == node_type.wall then
|
|
||||||
return node_wall()
|
|
||||||
elseif nt == node_type.roof then
|
|
||||||
return node_roof()
|
|
||||||
elseif nt == node_type.content then
|
|
||||||
return node_air()
|
|
||||||
elseif nt == node_type.stone then
|
|
||||||
return node_stone()
|
|
||||||
else
|
|
||||||
return original_block
|
|
||||||
end
|
|
||||||
end
|
|
||||||
|
|
||||||
local function biome_distance(def, heat, humidity)
|
|
||||||
return (def.heat_point - heat)^2 + (def.humidity_point - humidity)^2
|
|
||||||
end
|
|
||||||
|
|
||||||
minetest.register_on_generated(function(minp, maxp, blockseed)
|
|
||||||
local vminp =
|
|
||||||
{ x = minp.x - mapgen_buffer
|
|
||||||
, y = minp.y - mapgen_buffer
|
|
||||||
, z = minp.z - mapgen_buffer
|
|
||||||
}
|
|
||||||
local vmaxp =
|
|
||||||
{ x = maxp.x + mapgen_buffer
|
|
||||||
, y = maxp.y + mapgen_buffer
|
|
||||||
, z = maxp.z + mapgen_buffer
|
|
||||||
}
|
|
||||||
|
|
||||||
-- Get voxelmanip
|
|
||||||
local vm = minetest.get_mapgen_object("voxelmanip")
|
|
||||||
local flat_data = Flat3dArray:new(vminp, vmaxp, vm:get_data())
|
|
||||||
|
|
||||||
-- Get threshold values
|
|
||||||
local node_types = get_flat_cave_node_types(vminp, vmaxp)
|
|
||||||
|
|
||||||
local heat_points = get_flat_from_noise_params(minp, maxp, heat_noise_params)
|
|
||||||
local humidity_points = get_flat_from_noise_params(minp, maxp, humidity_noise_params)
|
|
||||||
|
|
||||||
-- Map block values
|
|
||||||
local nids = Flat3dArray:from_func(vminp, vmaxp, function(i, pos)
|
|
||||||
local nt = node_types:get_pos(pos)
|
|
||||||
|
|
||||||
if not is_valid_pos(pos, minp, maxp) then
|
|
||||||
return flat_data:get_pos(pos)
|
|
||||||
else
|
|
||||||
local biome = default_biome
|
|
||||||
|
|
||||||
local heat = heat_points:get_pos(pos)
|
|
||||||
local humidity = humidity_points:get_pos(pos)
|
|
||||||
|
|
||||||
for _, def in pairs(noordstar_caves.registered_biomes) do
|
|
||||||
if pos.x < def.minp.x then
|
|
||||||
elseif pos.y < def.minp.y then
|
|
||||||
elseif pos.z < def.minp.z then
|
|
||||||
elseif pos.x > def.maxp.x then
|
|
||||||
elseif pos.y > def.maxp.y then
|
|
||||||
elseif pos.z > def.maxp.z then
|
|
||||||
elseif biome_distance(def, heat, humidity) > biome_distance(biome, heat, humidity) then
|
|
||||||
else
|
|
||||||
biome = def
|
|
||||||
end
|
|
||||||
end
|
|
||||||
|
|
||||||
return biome_def_to_content_id(biome, nt, flat_data:get_pos(pos))
|
|
||||||
end
|
|
||||||
end)
|
|
||||||
|
|
||||||
-- Write all changes to the Minetest world
|
|
||||||
vm:set_data(nids.arr)
|
|
||||||
vm:write_to_map()
|
|
||||||
end)
|
|
||||||
Loading…
Reference in New Issue