add biomegen for lua mapgens
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@ -0,0 +1,114 @@
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# Biomegen
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Biome generator mod for Minetest, reproducing closely the biome generator provided by Minetest's core, but in Lua. Also includes an optional elevation adjustment parameter.
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It allows to use the biome systems on Lua mapgens (that do no allow to use core biome system). Since it reads registered biomes and decorations, it is compatible with all mods adding biomes/decos.
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Created by Gaël de Sailly in November 2020, licensed under LGPLv3.0.
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# Include it in your mapgen
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`biomegen` should be triggered during mapgen function, after the loop, but before writing to the map.
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Your mapgen should generate only these 4 nodes:
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- Stone (`mapgen_stone` / `default:stone`)
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- Water (`mapgen_water_source` / `default:water_source`)
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- River water (`mapgen_river_water_source` / `default:river_water_source`)
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- Air (`air`)
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All other nodes will be ignored, no biome will be placed ontop of them.
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You should add `biomegen` as a dependancy of your mod (optional or mandatory).
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## Functions
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Usual parameters:
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- `data`: Data containing the generated mapchunk
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- `area`: VoxelArea helper object for data. `area = VoxelArea:new({MinEdge = emin, MaxEdge = emax})`
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- `vm`: VoxelManip object
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- `minp`: minimal coordinates of the chunk being generated, e.g. `{x=48, y=-32, z=208}`
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- `maxp`: maximal coordinates of the chunk being generated, e.g. `{x=127, y=47, z=287}`
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- `seed`: world-specific seed
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### `biomegen.generate_all(data, area, vm, minp, maxp, seed)`
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All-in-one function to generate *biomes*, *decorations*, *ores* and *dust*. Includes a call to `vm:set_data` so no need to do it again. Using core function `minetest.generate_ores` for ores, so does not support biome-specific ores.
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### `biomegen.generate_biomes(data, area, minp, maxp)`
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Generates biomes in `data`, according to biomes that have been registered using `minetest.register_biome`.
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### `biomegen.place_all_decos(data, area, vm, minp, maxp, seed)`
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Generates decorations directly in `vm` (but reads `data` to know where to place them), according to decorations that have been registered using `minetest.register_decoration`.
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### `biomegen.dust_top_nodes(data, area, vm, minp, maxp)`
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Drops 'dust' (usually snow) on biomes that require it. Like above, generates directly in `vm` but reads from `data`. If you used `place_all_decos` to generate decorations, you should update `data` from the `vm`:
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```lua
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vm:get_data(data)
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```
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### `biomegen.set_elevation_chill(ec)`
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Sets elevation chill coefficient. `0` means temperature does not depend on elevation (behaviour of core's biomegen). Usual values `0`-`0.5`.
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## Examples
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### Using `biomegen.generate_all`
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```lua
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local data = {}
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minetest.register_on_generated(function(minp, maxp, seed)
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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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vm:get_data(data)
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------------------------
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-- [MAPGEN LOOP HERE] --
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------------------------
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-- Generate biomes, decorations, ores and dust
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biomegen.generate_all(data, area, vm, minp, maxp, seed)
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-- Calculate lighting for what has been created.
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vm:calc_lighting()
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-- Write what has been created to the world.
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vm:write_to_map()
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-- Liquid nodes were placed so set them flowing.
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vm:update_liquids()
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end)
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```
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### Equivalent with all functions
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```lua
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local data = {}
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minetest.register_on_generated(function(minp, maxp, seed)
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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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vm:get_data(data)
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------------------------
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-- [MAPGEN LOOP HERE] --
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------------------------
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-- Generate biomes in 'data', using biomegen mod
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biomegen.generate_biomes(data, area, minp, maxp)
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-- Write content ID data back to the voxelmanip.
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vm:set_data(data)
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-- Generate ores using core's function
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minetest.generate_ores(vm, minp, maxp)
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-- Generate decorations in VM (needs 'data' for reading)
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biomegen.place_all_decos(data, area, vm, minp, maxp, seed)
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-- Update data array to have ores/decorations
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vm:get_data(data)
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-- Add biome dust in VM (needs 'data' for reading)
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biomegen.dust_top_nodes(data, area, vm, minp, maxp)
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-- Calculate lighting for what has been created.
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vm:calc_lighting()
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-- Write what has been created to the world.
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vm:write_to_map()
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-- Liquid nodes were placed so set them flowing.
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vm:update_liquids()
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end)
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```
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### Mapgen example
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I have made a [modified version of `lvm_example`](https://github.com/Gael-de-Sailly/lvm_example/tree/biomegen) (mod originally by Paramat) to provide a minimal working example of a mapgen using `biomegen`. Try it!
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@ -0,0 +1,71 @@
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-- biomelist.lua
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local core_cid = minetest.get_content_id
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local function cid(name)
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if not name then
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return
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end
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local result
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pcall(function() --< try
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result = core_cid(name)
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end)
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if not result then
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print("[biomegen] Node " .. name .. " not found!")
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end
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return result
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end
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local function make_biomelist()
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local biomes = {}
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for _, a in pairs(minetest.registered_biomes) do
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local b = {}
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b.name = a.name
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biomes[b.name] = b
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if a.node_dust then
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b.node_dust_name = a.node_dust
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b.node_dust = cid(a.node_dust)
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end
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b.node_top = cid(a.node_top) or cid("mapgen_stone")
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b.depth_top = a.depth_top or 0
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b.node_filler = cid(a.node_filler) or cid("mapgen_stone")
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b.depth_filler = a.depth_filler or 0
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b.node_stone = cid(a.node_stone) or cid("mapgen_stone")
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b.node_water_top = cid(a.node_water_top) or cid("mapgen_water_source")
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b.depth_water_top = a.depth_water_top or 0
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b.node_water = cid(a.node_water) or cid("mapgen_water_source")
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b.node_river_water = cid(a.node_river_water) or cid("mapgen_river_water_source")
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b.node_riverbed = cid(a.node_riverbed) or cid("mapgen_stone")
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b.depth_riverbed = a.depth_riverbed or 0
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-- b.node_cave_liquid = ...
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-- b.node_dungeon = ...
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-- b.node_dungeon_alt = ...
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-- b.node_dungeon_stair = ...
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b.min_pos = a.min_pos or {x=-31000, y=-31000, z=-31000}
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if a.y_min then
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b.min_pos.y = math.max(b.min_pos.y, a.y_min)
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end
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b.max_pos = a.max_pos or {x=31000, y=31000, z=31000}
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if a.y_max then
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b.max_pos.y = math.min(b.max_pos.y, a.y_max)
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end
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b.vertical_blend = a.vertical_blend or 0
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b.heat_point = a.heat_point or 50
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b.humidity_point = a.humidity_point or 50
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end
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return biomes
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end
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return make_biomelist
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@ -0,0 +1,234 @@
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-- decorations.lua
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local emptynodes = {
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air = true,
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ignore = true,
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}
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local core_cid = minetest.get_content_id
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local function cid(name)
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if not name then
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return
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end
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local result
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pcall(function() --< try
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result = core_cid(name)
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end)
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if not result then
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print("[biomegen] Node " .. name .. " not found!")
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end
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return result
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end
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local function generate_deco_simple(deco, vm, pr, p, ceiling)
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local emin, emax = vm:get_emerged_area()
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local place_offset_y = deco.place_offset_y
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if ceiling then
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if p.y - place_offset_y - deco.height_max < emin.y then
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return 0
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elseif p.y - 1 - place_offset_y > emax.y then
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return 0
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end
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else
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if p.y + place_offset_y + deco.height_max > emax.y then
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return 0
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elseif p.y + 1 + place_offset_y < emin.y then
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return 0
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end
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end
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local decos = deco.decoration
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if #decos == 0 then
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return 0
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end
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local nodename = decos[pr:next(1,#decos)]
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local height = deco.vary_height and pr:next(deco.height, deco.height_max) or deco.height
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local param2 = deco.vary_param2 and pr:next(deco.param2, deco.param2_max) or deco.param2
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local force_placement = deco.flags.force_placement == true
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local direction = ceiling and -1 or 1
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p.y = p.y + place_offset_y * direction
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for i=1, height do
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p.y = p.y + direction
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local node = vm:get_node_at(p)
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if not force_placement and not emptynodes[node.name] then
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break
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end
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node.name = nodename
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node.param2 = param2
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vm:set_node_at(p, node)
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end
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return 1
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end
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local function get_schematic_size(schem)
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if type(schem) == "table" then
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return schem.size
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elseif type(schem) == "string" then
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local mts = io.open(schem)
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if not mts then
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return {x=0, y=0, z=0}
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end
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mts:seek('set', 6)
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local sx1, sx2, sy1, sy2, sz1, sz2 = mts:read(6):byte()
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mts:close()
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return {x=sx1*256+sx2, y=sy1*256+sy2, z=sz1*256+sz2}
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end
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return {x=0, y=0, z=0}
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end
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local function generate_deco_schematic(deco, vm, pr, p, ceiling)
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local force_placement = deco.flags.force_placement == true
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local direction = ceiling and -1 or 1
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if not deco.flags.place_center_y then
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if ceiling then
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local size = get_schematic_size(schem)
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p.y = p.y - deco.place_offset_y - size.y + 1
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else
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p.y = p.y + deco.place_offset_y
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end
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end
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minetest.place_schematic_on_vmanip(vm, p, deco.schematic, deco.rotation, deco.replacements, force_placement, deco.schem_flags)
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return 1
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end
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|
||||
local function parse_node_list(raw_list)
|
||||
if not raw_list then
|
||||
return {}
|
||||
end
|
||||
local ilist = {}
|
||||
if type(raw_list) == "string" then
|
||||
raw_list = {raw_list}
|
||||
end
|
||||
|
||||
for i, node in ipairs(raw_list) do
|
||||
if node:sub(1, 6) == "group:" then
|
||||
local groupname = node:sub(7, -1)
|
||||
for name, ndef in pairs(minetest.registered_nodes) do
|
||||
if ndef.groups and ndef.groups[groupname] and ndef.groups[groupname] > 0 then
|
||||
local id = cid(name)
|
||||
if id then
|
||||
ilist[id] = true
|
||||
end
|
||||
end
|
||||
end
|
||||
else
|
||||
local id = cid(node)
|
||||
if id then
|
||||
ilist[id] = true
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
return ilist
|
||||
end
|
||||
|
||||
local function make_decolist()
|
||||
local decos = {}
|
||||
|
||||
for i, a in pairs(minetest.registered_decorations) do
|
||||
local b = {}
|
||||
decos[i] = b
|
||||
|
||||
b.name = a.name or "unnamed " .. i
|
||||
|
||||
b.deco_type = a.deco_type or "simple"
|
||||
|
||||
b.place_on = parse_node_list(a.place_on)
|
||||
|
||||
b.sidelen = a.sidelen or 8
|
||||
b.fill_ratio = a.fill_ratio or 0.02
|
||||
local np = a.noise_params
|
||||
b.use_noise = false
|
||||
if np then
|
||||
b.use_noise = true
|
||||
b.noise = minetest.get_perlin(np)
|
||||
end
|
||||
|
||||
b.use_biomes = false
|
||||
if a.biomes then
|
||||
local biomes_raw = a.biomes
|
||||
b.use_biomes = true
|
||||
if type(biomes_raw) == "table" then
|
||||
local biomes = {}
|
||||
b.biomes = biomes
|
||||
for i, biome in pairs(biomes_raw) do
|
||||
if type(biome) == "number" then
|
||||
biome = minetest.get_biome_name(biome)
|
||||
end
|
||||
biomes[biome] = true
|
||||
end
|
||||
else
|
||||
if type(biomes_raw) == "number" then
|
||||
biomes_raw = minetest.get_biome_name(biomes_raw)
|
||||
end
|
||||
b.biomes = {[biomes_raw] = true}
|
||||
end
|
||||
end
|
||||
|
||||
b.y_min = a.y_min or -31000
|
||||
b.y_max = a.y_max or 31000
|
||||
|
||||
b.spawn_by = parse_node_list(a.spawn_by)
|
||||
b.num_spawn_by = a.num_spawn_by or 0
|
||||
|
||||
local flags_raw = a.flags or ""
|
||||
local flags = {}
|
||||
b.flags = flags
|
||||
for i, flag in ipairs(flags_raw:split()) do
|
||||
flag = flag:trim()
|
||||
local status = true
|
||||
if flag:sub(1,2) == "no" then
|
||||
flag = flag:sub(3,-1)
|
||||
status = false
|
||||
end
|
||||
flags[flag] = status
|
||||
end
|
||||
|
||||
if b.deco_type == "simple" then
|
||||
local a_deco = a.decoration
|
||||
if type(a_deco) == "string" then
|
||||
a_deco = {a_deco}
|
||||
end
|
||||
local b_deco = {}
|
||||
for _, deco in ipairs(a_deco) do
|
||||
if cid(deco) then
|
||||
table.insert(b_deco, deco)
|
||||
end
|
||||
end
|
||||
b.decoration = b_deco
|
||||
b.height = a.height or 1
|
||||
b.height_max = math.max(a.height_max or b.height, b.height)
|
||||
b.vary_height = b.height < b.height_max
|
||||
b.param2 = a.param2 or 0
|
||||
b.param2_max = math.max(a.params2_max or b.param2, b.height)
|
||||
b.vary_param2 = b.param2 < b.param2_max
|
||||
b.place_offset_y = a.place_offset_y or 0
|
||||
b.generate = generate_deco_simple
|
||||
elseif b.deco_type == "schematic" then
|
||||
b.schematic = a.schematic
|
||||
b.replacements = a.replacements or {}
|
||||
b.rotation = a.rotation or 0
|
||||
b.place_offset_y = a.place_offset_y or 0
|
||||
|
||||
local schem_flags = {}
|
||||
for _, flag in ipairs({'place_center_x', 'place_center_y', 'place_center_z'}) do
|
||||
if flags[flag] then
|
||||
table.insert(schem_flags, flag)
|
||||
end
|
||||
end
|
||||
b.schem_flags = table.concat(schem_flags, ',')
|
||||
|
||||
b.generate = generate_deco_schematic
|
||||
end
|
||||
end
|
||||
|
||||
return decos
|
||||
end
|
||||
|
||||
return make_decolist
|
||||
|
|
@ -0,0 +1,569 @@
|
|||
-- biomegen/init.lua
|
||||
|
||||
local make_biomelist = dofile(minetest.get_modpath(minetest.get_current_modname()) .. "/biomelist.lua")
|
||||
local make_decolist = dofile(minetest.get_modpath(minetest.get_current_modname()) .. "/decorations.lua")
|
||||
|
||||
local np_filler_depth = {
|
||||
offset = 0,
|
||||
scale = 1.2,
|
||||
spread = {x=150, y=150, z=150},
|
||||
seed = 261,
|
||||
octaves = 3,
|
||||
persist = 0.7,
|
||||
lacunarity = 2.0,
|
||||
}
|
||||
|
||||
local nobj_filler_depth, nobj_heat, nobj_heat_blend, nobj_humid, nobj_humid_blend
|
||||
local nvals_filler_depth = {}
|
||||
local nvals_heat = {}
|
||||
local nvals_heat_blend = {}
|
||||
local nvals_humid = {}
|
||||
local nvals_humid_blend = {}
|
||||
|
||||
local water_level = tonumber(minetest.get_mapgen_setting('water_level'))
|
||||
local elevation_chill = 0
|
||||
local function set_elevation_chill(ec)
|
||||
elevation_chill = ec
|
||||
end
|
||||
|
||||
local init = false
|
||||
|
||||
local c_ignore
|
||||
local c_air
|
||||
local c_stone
|
||||
local c_water
|
||||
local c_rwater
|
||||
|
||||
local biomes, decos
|
||||
|
||||
local function initialize(chulens)
|
||||
print("[biomegen] Initializing")
|
||||
|
||||
init = true
|
||||
|
||||
local noiseparams = minetest.get_mapgen_setting_noiseparams
|
||||
|
||||
local chulens2d = {x=chulens.x, y=chulens.z, z=1}
|
||||
local np_heat = noiseparams('mg_biome_np_heat')
|
||||
water_level = multi_map.get_absolute_centerpoint()
|
||||
np_heat.offset = np_heat.offset + water_level*elevation_chill
|
||||
nobj_filler_depth = minetest.get_perlin_map(np_filler_depth, chulens2d)
|
||||
nobj_heat = minetest.get_perlin_map(np_heat, chulens2d)
|
||||
nobj_heat_blend = minetest.get_perlin_map(noiseparams('mg_biome_np_heat_blend'), chulens2d)
|
||||
nobj_humid = minetest.get_perlin_map(noiseparams('mg_biome_np_humidity'), chulens2d)
|
||||
nobj_humid_blend = minetest.get_perlin_map(noiseparams('mg_biome_np_humidity_blend'), chulens2d)
|
||||
|
||||
c_ignore = minetest.get_content_id("ignore")
|
||||
c_air = minetest.get_content_id("air")
|
||||
c_stone = minetest.get_content_id("mapgen_stone")
|
||||
c_water = minetest.get_content_id("mapgen_water_source")
|
||||
c_rwater = minetest.get_content_id("mapgen_river_water_source")
|
||||
|
||||
biomes = make_biomelist()
|
||||
decos = make_decolist()
|
||||
end
|
||||
|
||||
local biomemap = {}
|
||||
local heatmap = {}
|
||||
local humidmap = {}
|
||||
|
||||
local function calculate_noises(minp)
|
||||
local minp2d = {x=minp.x, y=minp.z}
|
||||
nobj_filler_depth:get_2d_map_flat(minp2d, nvals_filler_depth)
|
||||
|
||||
nobj_heat:get_2d_map_flat(minp2d, nvals_heat)
|
||||
nobj_heat_blend:get_2d_map_flat(minp2d, nvals_heat_blend)
|
||||
|
||||
nobj_humid:get_2d_map_flat(minp2d, nvals_humid)
|
||||
nobj_humid_blend:get_2d_map_flat(minp2d, nvals_humid_blend)
|
||||
|
||||
for i, heat in ipairs(nvals_heat) do -- use nvals_heat to iterate, could have been another one
|
||||
heatmap[i] = heat + nvals_heat_blend[i]
|
||||
humidmap[i] = nvals_humid[i] + nvals_humid_blend[i]
|
||||
end
|
||||
end
|
||||
|
||||
local function calc_biome_from_noise(heat, humid, pos)
|
||||
local biome_closest = nil
|
||||
local biome_closest_blend = nil
|
||||
local dist_min = 31000
|
||||
local dist_min_blend = 31000
|
||||
|
||||
for i, biome in pairs(biomes) do
|
||||
local min_pos, max_pos = biome.min_pos, biome.max_pos
|
||||
if pos.y >= min_pos.y and pos.y <= max_pos.y+biome.vertical_blend
|
||||
and pos.x >= min_pos.x and pos.x <= max_pos.x
|
||||
and pos.z >= min_pos.z and pos.z <= max_pos.z then
|
||||
local d_heat = heat - biome.heat_point
|
||||
local d_humid = humid - biome.humidity_point
|
||||
local dist = d_heat*d_heat + d_humid*d_humid -- Pythagorean distance
|
||||
|
||||
if pos.y <= max_pos.y then -- Within y limits of biome
|
||||
if dist < dist_min then
|
||||
dist_min = dist
|
||||
biome_closest = biome
|
||||
end
|
||||
elseif dist < dist_min_blend then -- Blend area above biome
|
||||
dist_min_blend = dist
|
||||
biome_closest_blend = biome
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
-- Carefully tune pseudorandom seed variation to avoid single node dither
|
||||
-- and create larger scale blending patterns similar to horizontal biome
|
||||
-- blend.
|
||||
local seed = math.floor(pos.y + (heat+humid) * 0.9)
|
||||
local rng = PseudoRandom(seed)
|
||||
|
||||
if biome_closest_blend and dist_min_blend <= dist_min
|
||||
and rng:next(0, biome_closest_blend.vertical_blend) >= pos.y - biome_closest_blend.max_pos.y then
|
||||
return biome_closest_blend
|
||||
end
|
||||
|
||||
return biome_closest
|
||||
end
|
||||
|
||||
local function get_biome_at_index(i, pos)
|
||||
water_level = multi_map.get_absolute_centerpoint()
|
||||
local heat = heatmap[i] - math.max(pos.y, water_level)*elevation_chill
|
||||
local humid = humidmap[i]
|
||||
return calc_biome_from_noise(heat, humid, pos)
|
||||
end
|
||||
|
||||
local function generate_biomes(data, a, minp, maxp)
|
||||
water_level = multi_map.get_absolute_centerpoint(multi_map.get_layer(minp.y))
|
||||
local chulens = {x=maxp.x-minp.x+1, y=maxp.y-minp.y+1, z=maxp.z-minp.z+1}
|
||||
|
||||
local index = 1
|
||||
|
||||
if not init then
|
||||
initialize(chulens)
|
||||
end
|
||||
|
||||
calculate_noises(minp)
|
||||
|
||||
for z=minp.z, maxp.z do
|
||||
for x=minp.x, maxp.x do
|
||||
local biome = nil
|
||||
local water_biome = nil
|
||||
local biome_stone = c_stone
|
||||
|
||||
local depth_top = 0
|
||||
local base_filler = 0
|
||||
local depth_water_top = 0
|
||||
local depth_riverbed = 0
|
||||
|
||||
local biome_y_min = -31000
|
||||
local y_start = maxp.y
|
||||
local vi = a:index(x, maxp.y, z)
|
||||
local ystride = a.ystride
|
||||
|
||||
local c_above = data[vi+ystride]
|
||||
if c_above == c_ignore then
|
||||
y_start = y_start - 1
|
||||
c_above = data[vi]
|
||||
vi = vi - ystride
|
||||
end
|
||||
local air_above = c_above == c_air
|
||||
local river_water_above = c_above == c_rwater
|
||||
local water_above = c_above == c_water or river_water_above
|
||||
|
||||
biomemap[index] = nil
|
||||
|
||||
local nplaced = (air_above or water_above) and 0 or 31000
|
||||
|
||||
for y=y_start, minp.y-1, -1 do
|
||||
local c = data[vi]
|
||||
local is_stone_surface = (c == c_stone) and
|
||||
(air_above or water_above or not biome or y < biome_y_min)
|
||||
local is_water_surface = (c == c_water or c == c_rwater) and
|
||||
(air_above or not biome or y < biome_y_min)
|
||||
|
||||
if is_stone_surface or is_water_surface then
|
||||
biome = get_biome_at_index(index, {x=x, y=y, z=z})
|
||||
biome_stone = biome.node_stone
|
||||
|
||||
if not biomemap[index] and is_stone_surface then
|
||||
biomemap[index] = biome
|
||||
end
|
||||
|
||||
if not water_biome and is_water_surface then
|
||||
water_biome = biome
|
||||
end
|
||||
|
||||
depth_top = biome.depth_top
|
||||
base_filler = math.max(depth_top + biome.depth_filler + nvals_filler_depth[index], 0)
|
||||
depth_water_top = biome.depth_water_top
|
||||
depth_riverbed = biome.depth_riverbed
|
||||
biome_y_min = biome.min_pos.y
|
||||
end
|
||||
|
||||
if c == c_stone or c == biome_stone then
|
||||
local c_below = data[vi-ystride]
|
||||
if c_below == c_air or c_below == c_rwater or c_below == c_water then
|
||||
nplaced = 31000
|
||||
end
|
||||
if river_water_above then
|
||||
if nplaced < depth_riverbed then
|
||||
data[vi] = biome.node_riverbed
|
||||
nplaced = nplaced + 1
|
||||
else
|
||||
nplaced = 31000
|
||||
river_water_above = false
|
||||
end
|
||||
elseif nplaced < depth_top then
|
||||
data[vi] = biome.node_top
|
||||
nplaced = nplaced + 1
|
||||
elseif nplaced < base_filler then
|
||||
data[vi] = biome.node_filler
|
||||
nplaced = nplaced + 1
|
||||
else
|
||||
data[vi] = biome_stone
|
||||
nplaced = 31000
|
||||
end
|
||||
|
||||
air_above = false
|
||||
water_above = false
|
||||
elseif c == c_water then
|
||||
if y > water_level-depth_water_top then
|
||||
data[vi] = biome.node_water_top
|
||||
else
|
||||
data[vi] = biome.node_water
|
||||
end
|
||||
nplaced = 0
|
||||
air_above = false
|
||||
water_above = true
|
||||
elseif c == c_rwater then
|
||||
data[vi] = biome.node_river_water
|
||||
nplaced = 0
|
||||
air_above = false
|
||||
water_above = true
|
||||
river_water_above = true
|
||||
elseif c == c_air then
|
||||
nplaced = 0
|
||||
air_above = true
|
||||
water_above = false
|
||||
else
|
||||
nplaced = 31000
|
||||
air_above = false
|
||||
water_above = false
|
||||
end
|
||||
|
||||
vi = vi - ystride
|
||||
end
|
||||
|
||||
if not biomemap[index] then
|
||||
biomemap[index] = water_biome
|
||||
end
|
||||
|
||||
index = index + 1
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
-- Walkable, liquid, and dustable: memoization tables for better performance
|
||||
local walkable = setmetatable({}, {
|
||||
__index = function(t, c)
|
||||
local is_walkable = false
|
||||
local ndef = minetest.registered_nodes[minetest.get_name_from_content_id(c)]
|
||||
if ndef and ndef.walkable then
|
||||
is_walkable = true
|
||||
end
|
||||
|
||||
t[c] = is_walkable
|
||||
return is_walkable
|
||||
end,
|
||||
})
|
||||
|
||||
local liquid = setmetatable({}, {
|
||||
__index = function(t, c)
|
||||
local is_liquid = false
|
||||
local ndef = minetest.registered_nodes[minetest.get_name_from_content_id(c)]
|
||||
if ndef and ndef.liquidtype then
|
||||
is_liquid = ndef.liquidtype ~= "none"
|
||||
end
|
||||
|
||||
t[c] = is_liquid
|
||||
return is_liquid
|
||||
end,
|
||||
})
|
||||
|
||||
local function can_place_deco(deco, data, vi, pattern)
|
||||
if not deco.place_on[data[vi]] then
|
||||
return false
|
||||
elseif deco.num_spawn_by <= 0 then
|
||||
return true
|
||||
end
|
||||
|
||||
local spawn_by = deco.spawn_by
|
||||
local nneighs = deco.num_spawn_by
|
||||
for i, incr in ipairs(pattern) do
|
||||
vi = vi + incr
|
||||
if spawn_by[data[vi]] then
|
||||
nneighs = nneighs - 1
|
||||
if nneighs < 1 then
|
||||
return true
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
return false
|
||||
end
|
||||
|
||||
local function place_deco(deco, data, a, vm, minp, maxp, blockseed)
|
||||
local ps = PcgRandom(blockseed + 53)
|
||||
local carea_size = maxp.x - minp.x + 1
|
||||
|
||||
local sidelen = deco.sidelen
|
||||
if carea_size % sidelen > 0 then
|
||||
sidelen = carea_size
|
||||
end
|
||||
local divlen = carea_size / sidelen - 1
|
||||
local area = sidelen*sidelen
|
||||
local ystride, zstride = a.ystride, a.zstride
|
||||
local pattern = {1, zstride, -1, -1, -zstride, -zstride, 1, 1, ystride, zstride, zstride, -1, -1, -zstride, -zstride, 1} -- Successive increments to iterate over 16 neighbouring nodes
|
||||
|
||||
for z0=0, divlen do
|
||||
for x0=0, divlen do
|
||||
local p2d_center = {x=minp.x+sidelen*(x0+0.5), y=minp.z+sidelen*(z0+0.5)}
|
||||
local p2d_min = {x=minp.x+sidelen*x0, y=minp.z+sidelen*z0}
|
||||
local p2d_max = {x=minp.x+sidelen*(x0+1)-1, y=minp.z+sidelen*(z0+1)-1}
|
||||
|
||||
local cover = false
|
||||
local nval = deco.use_noise and deco.noise:get_2d(p2d_center) or deco.fill_ratio
|
||||
local deco_count = 0
|
||||
|
||||
if nval >= 10 then
|
||||
cover = true
|
||||
deco_count = area
|
||||
else
|
||||
local deco_count_f = area * nval
|
||||
if deco_count_f >= 1 then
|
||||
deco_count = deco_count_f
|
||||
elseif deco_count_f > 0 and ps:next(1, 1000) <= deco_count_f * 1000 then
|
||||
deco_count = 1
|
||||
end
|
||||
end
|
||||
|
||||
local x = p2d_min.x - 1
|
||||
local z = p2d_min.y
|
||||
|
||||
for i=1, deco_count do
|
||||
if not cover then
|
||||
x = ps:next(p2d_min.x, p2d_max.x)
|
||||
z = ps:next(p2d_min.y, p2d_max.y)
|
||||
else
|
||||
x = x + 1
|
||||
if x == p2d_max.x + 1 then
|
||||
z = z + 1
|
||||
x = p2d_min.x
|
||||
end
|
||||
end
|
||||
local mapindex = carea_size * (z - minp.z) + (x - minp.x)
|
||||
|
||||
if deco.flags["all_floors"] == true and deco.flags["all_ceilings"] == true then
|
||||
local biome_ok = true
|
||||
if deco.use_biomes and #biomemap > 0 then
|
||||
local biome_here = biomemap[mapindex]
|
||||
if biome_here and not deco.biomes[biome_here.name] then
|
||||
biome_ok = false
|
||||
end
|
||||
end
|
||||
|
||||
if biome_ok then
|
||||
local size = (maxp.x - minp.x + 1) / 2
|
||||
local floors = {}
|
||||
local ceilings = {}
|
||||
|
||||
local is_walkable = false
|
||||
local vi = a:index(x, maxp.y, z)
|
||||
local walkable_above = walkable[data[vi]]
|
||||
for y = maxp.y-1, minp.y, -1 do
|
||||
vi = vi - ystride
|
||||
is_walkable = walkable[data[vi]]
|
||||
if is_walkable and not walkable_above then
|
||||
table.insert(floors, y)
|
||||
elseif walkable_above and not walkable then
|
||||
table.insert(ceilings, y)
|
||||
end
|
||||
|
||||
walkable_above = is_walkable
|
||||
end
|
||||
|
||||
if deco.flags["all_floors"] then
|
||||
for _, y in ipairs(floors) do
|
||||
if y >= biome.y_min and y <= biome.y_max then
|
||||
local pos = {x=x, y=y, z=z}
|
||||
if can_place_deco(deco, data, vi, pattern) then
|
||||
deco:generate(vm, ps, pos, false)
|
||||
end
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
if deco.flags["all_ceilings"] then
|
||||
for _, y in ipairs(ceilings) do
|
||||
if y >= biome.y_min and y <= biome.y_max then
|
||||
local pos = {x=x, y=y, z=z}
|
||||
if can_place_deco(deco, data, vi, pattern) then
|
||||
deco:generate(vm, ps, pos, true)
|
||||
end
|
||||
end
|
||||
end
|
||||
end
|
||||
end
|
||||
else
|
||||
local y = -31000
|
||||
if deco.flags["liquid_surface"] == true then
|
||||
local vi = a:index(x, maxp.y, z)
|
||||
for yi=maxp.y, minp.y, -1 do
|
||||
local c = data[vi]
|
||||
if walkable[c] then
|
||||
break
|
||||
elseif liquid[c] then
|
||||
y = yi
|
||||
break
|
||||
end
|
||||
vi = vi - ystride
|
||||
end
|
||||
else
|
||||
local vi = a:index(x, maxp.y, z)
|
||||
for yi=maxp.y, minp.y, -1 do
|
||||
if walkable[data[vi]] then
|
||||
y = yi
|
||||
break
|
||||
end
|
||||
vi = vi - ystride
|
||||
end
|
||||
end
|
||||
|
||||
if y >= deco.y_min and y <= deco.y_max and y >= minp.y and y <= maxp.y then
|
||||
local biome_ok = true
|
||||
if deco.use_biomes and #biomemap > 0 then
|
||||
local biome_here = biomemap[mapindex]
|
||||
if biome_here and not deco.biomes[biome_here.name] then
|
||||
biome_ok = false
|
||||
end
|
||||
end
|
||||
|
||||
if biome_ok then
|
||||
local pos = {x=x, y=y, z=z}
|
||||
if can_place_deco(deco, data, a:index(x,y,z), pattern) then
|
||||
deco:generate(vm, ps, pos, false)
|
||||
end
|
||||
end
|
||||
end
|
||||
end
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
return 0
|
||||
end
|
||||
|
||||
local function get_blockseed(p, seed)
|
||||
return seed + p.z * 38134234 + p.y * 42123 + p.x * 23
|
||||
end
|
||||
|
||||
local function place_all_decos(data, a, vm, minp, maxp, seed)
|
||||
local emin = vm:get_emerged_area()
|
||||
local blockseed = get_blockseed(emin, seed)
|
||||
|
||||
local nplaced = 0
|
||||
|
||||
for i, deco in pairs(decos) do
|
||||
nplaced = nplaced + place_deco(deco, data, a, vm, minp, maxp, blockseed)
|
||||
end
|
||||
|
||||
return nplaced
|
||||
end
|
||||
|
||||
local dustable = setmetatable({}, {
|
||||
__index = function(t, c)
|
||||
local is_dustable = false
|
||||
local ndef = minetest.registered_nodes[minetest.get_name_from_content_id(c)]
|
||||
if ndef and ndef.walkable then
|
||||
local dtype = ndef.drawtype
|
||||
if dtype and dtype == "normal" or dtype == "allfaces" or dtype == "allfaces_optional" or dtype == "glasslike" or dtype == "glasslike_framed" or dtype == "glasslike_framed_optional" then
|
||||
is_dustable = true
|
||||
end
|
||||
end
|
||||
|
||||
t[c] = is_dustable
|
||||
return is_dustable
|
||||
end,
|
||||
})
|
||||
|
||||
local function dust_top_nodes(data, a, vm, minp, maxp)
|
||||
water_level = multi_map.get_absolute_centerpoint()
|
||||
if maxp.y < water_level then
|
||||
return
|
||||
end
|
||||
|
||||
local full_maxp = a.MaxEdge
|
||||
|
||||
local index = 1
|
||||
local ystride = a.ystride
|
||||
|
||||
for z = minp.z, maxp.z do
|
||||
for x = minp.x, maxp.x do
|
||||
local biome = biomemap[index]
|
||||
|
||||
if biome and biome.node_dust then
|
||||
local vi = a:index(x, full_maxp.y, z)
|
||||
local c_full_max = data[vi]
|
||||
local y_start
|
||||
|
||||
if c_full_max == c_air then
|
||||
y_start = full_maxp.y - 1
|
||||
elseif c_full_max == c_ignore then
|
||||
vi = a:index(x, maxp.y, z)
|
||||
local c_max = data[vi]
|
||||
|
||||
if c_max == c_air then
|
||||
y_start = maxp.y
|
||||
end
|
||||
end
|
||||
|
||||
if y_start then -- workaround for the 'continue' statement
|
||||
vi = a:index(x, y_start, z)
|
||||
local y = y_start
|
||||
for y0=y_start, minp.y-1, -1 do
|
||||
if data[vi] ~= c_air then
|
||||
y = y0
|
||||
break
|
||||
end
|
||||
vi = vi - ystride
|
||||
end
|
||||
local c = data[vi]
|
||||
if dustable[c] and c ~= biome.node_dust then
|
||||
local pos = {x=x, y=y+1, z=z}
|
||||
vm:set_node_at(pos, {name=biome.node_dust_name})
|
||||
end
|
||||
end
|
||||
end
|
||||
index = index + 1
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
biomegen = {
|
||||
set_elevation_chill = set_elevation_chill,
|
||||
calculate_noises = calculate_noises,
|
||||
get_biome_at_index = get_biome_at_index,
|
||||
calc_biome_from_noise = calc_biome_from_noise,
|
||||
generate_biomes = generate_biomes,
|
||||
place_all_decos = place_all_decos,
|
||||
dust_top_nodes = dust_top_nodes,
|
||||
}
|
||||
|
||||
function biomegen.generate_all(data, a, vm, minp, maxp, seed)
|
||||
water_level = multi_map.get_absolute_centerpoint()
|
||||
generate_biomes(data, a, minp, maxp)
|
||||
vm:set_data(data)
|
||||
place_all_decos(data, a, vm, minp, maxp, seed)
|
||||
minetest.generate_ores(vm, minp, maxp)
|
||||
vm:get_data(data)
|
||||
dust_top_nodes(data, a, vm, minp, maxp)
|
||||
end
|
||||
|
|
@ -0,0 +1,3 @@
|
|||
name = biomegen
|
||||
author = Gael-de-Sailly
|
||||
title = Lua Biome Generator
|
||||
|
|
@ -394,6 +394,9 @@ minetest.register_on_generated(function(minp, maxp,seed)
|
|||
else
|
||||
for i,f in ipairs(t) do
|
||||
f.generator(multi_map.current_layer, vm, area, vm_data, minp, maxp, offset_minp, offset_maxp, f.arguments,seed)
|
||||
if biomegen and ( not f.arguments or ( f.arguments and not f.arguments.nobiomoes ) ) then
|
||||
biomegen.generate_all(vm_data, area, vm, minp, maxp, seed)
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
|
|
|
|||
|
|
@ -1,3 +1,3 @@
|
|||
name = multi_map_core
|
||||
description = multi_map core engine and API for mineclone
|
||||
depends = mcl_core
|
||||
depends = mcl_core, biomegen
|
||||
|
|
|
|||
|
|
@ -15,7 +15,7 @@ multi_map.register_fallback_generator("Default Simple", mmgen_simple.generate)
|
|||
|
||||
multi_map.register_generator(0, mmgen_testauri.generate )
|
||||
multi_map.register_generator(1, mmgen_mytest.generate, {stone="mcl_core:stone",dirt="mcl_core:dirt",grass="mcl_core:dirt_with_grass",water="mcl_core:water_source",air="air"})
|
||||
multi_map.register_generator(2, mmgen_simple.generate, {nodetype="mcl_core:dirt"})
|
||||
multi_map.register_generator(2, mmgen_simple.generate, {nodetype="mcl_core:stone"})
|
||||
multi_map.register_generator(3, mmgen_simple.generate, {nodetype="mcl_core:obsidian"})
|
||||
multi_map.register_generator(4, mmgen_levels.generate)
|
||||
|
||||
|
|
|
|||
|
|
@ -33,7 +33,7 @@ local floatper = math.pi / FLOATPER
|
|||
|
||||
-- Generate function
|
||||
|
||||
function mmgen_levels.generate(current_layer, vm, area, data, minp, maxp, offset_minp, offset_maxp, params)
|
||||
function mmgen_levels.generate(current_layer, vm, area, data, minp, maxp, offset_minp, offset_maxp, param,seed)
|
||||
|
||||
if not params then params = {} end
|
||||
|
||||
|
|
@ -136,7 +136,7 @@ function mmgen_levels.generate(current_layer, vm, area, data, minp, maxp, offset
|
|||
data[vi] = c_sand
|
||||
under[si] = 0
|
||||
else
|
||||
data[vi] = c_dirt
|
||||
--data[vi] = c_dirt
|
||||
under[si] = 1
|
||||
end
|
||||
elseif relative_y > (params.ysurfmin or YSURFMIN) and relative_y <= (params.ywater or YWATER) then
|
||||
|
|
@ -149,7 +149,7 @@ function mmgen_levels.generate(current_layer, vm, area, data, minp, maxp, offset
|
|||
under[si] = 0
|
||||
else -- air, possibly just above surface
|
||||
if under[si] == 1 then
|
||||
data[viu] = c_grass
|
||||
--data[viu] = c_grass
|
||||
end
|
||||
stable[si] = 0
|
||||
under[si] = 0
|
||||
|
|
@ -157,7 +157,7 @@ function mmgen_levels.generate(current_layer, vm, area, data, minp, maxp, offset
|
|||
elseif y == y1 + 1 then
|
||||
if density <= 0 and relative_y > (params.ywater or YWATER) then -- air, possibly just above surface
|
||||
if under[si] == 1 then
|
||||
data[viu] = c_grass
|
||||
--data[viu] = c_grass
|
||||
end
|
||||
end
|
||||
end
|
||||
|
|
|
|||
|
|
@ -1,9 +1,5 @@
|
|||
mmgen_mytest = {}
|
||||
--multi_map.register_global_3dmap(
|
||||
-- "terrain",
|
||||
-- {offset=0, scale=1, spread={x=200, y=125, z=200}, seed=1235, octaves=5, persist=0.6}
|
||||
--)
|
||||
|
||||
|
||||
function mmgen_mytest.generate(current_layer, vm, a, data, minp, maxp, offset_minp, offset_maxp,arg,seed)
|
||||
local t1 = os.clock()
|
||||
|
||||
|
|
@ -43,5 +39,4 @@ function mmgen_mytest.generate(current_layer, vm, a, data, minp, maxp, offset_mi
|
|||
end
|
||||
end
|
||||
end
|
||||
biomegen.generate_all(data, a, vm, minp, maxp, seed)
|
||||
end
|
||||
|
|
|
|||
Loading…
Reference in New Issue