everness/mapgen_after.lua
Juraj Vajda fe990f4bcc Cleanup
2024-02-10 16:22:40 -05:00

98 lines
4.0 KiB
Lua

--[[
Everness. Never ending discovery in Everness mapgen.
Copyright (C) 2024 SaKeL
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
--]]
-- Localize data buffer table outside the loop, to be re-used for all
-- mapchunks, therefore minimising memory use.
local data = {}
local p2data = {}
minetest.register_on_generated(function(minp, maxp, blockseed)
-- Start time of mapchunk generation.
-- local t0 = os.clock()
local rand = PcgRandom(blockseed)
-- Array containing the biome IDs of nodes in the most recently generated chunk by the current mapgen
local biomemap = minetest.get_mapgen_object('biomemap')
-- Table mapping requested generation notification types to arrays of positions at which the corresponding generated structures are located within the current chunk
local gennotify = minetest.get_mapgen_object('gennotify')
-- Load the voxelmanip with the result of engine mapgen
local vm, emin, emax = minetest.get_mapgen_object('voxelmanip')
-- 'area' is used later to get the voxelmanip indexes for positions
local area = VoxelArea:new({ MinEdge = emin, MaxEdge = emax })
-- Get the content ID data from the voxelmanip in the form of a flat array.
-- Set the buffer parameter to use and reuse 'data' for this.
vm:get_data(data)
-- Raw `param2` data read into the `VoxelManip` object
vm:get_param2_data(p2data)
-- Side length of mapchunk
local shared_args = {}
--
-- on_data
--
-- read/write to `data` what will be eventually saved (set_data)
-- used for voxelmanip `data` manipulation
for _, def in ipairs(Everness.on_generated_queue) do
if def.can_run(biomemap) and def.on_data then
shared_args[def.name] = shared_args[def.name] or {}
def.on_data(minp, maxp, area, data, p2data, gennotify, rand, shared_args[def.name])
end
end
-- set data after they have been manipulated (from above)
vm:set_data(data)
vm:set_param2_data(p2data)
--
-- after_set_data
--
-- read-only (but cant and should not manipulate) voxelmanip `data`
-- used for `place_schematic_on_vmanip` which will invalidate `data`
-- therefore we are doing it after we set the data
for _, def in ipairs(Everness.on_generated_queue) do
if def.can_run(biomemap) and def.after_set_data then
shared_args[def.name] = shared_args[def.name] or {}
def.after_set_data(minp, maxp, vm, area, data, p2data, gennotify, rand, shared_args[def.name])
end
end
-- Set the lighting within the `VoxelManip` to a uniform value
vm:set_lighting({ day = 0, night = 0 }, minp, maxp)
-- Calculate lighting for what has been created.
vm:calc_lighting()
-- Liquid nodes were placed so set them flowing.
vm:update_liquids()
-- Write what has been created to the world.
vm:write_to_map()
--
-- after_write_to_map
--
-- Cannot read/write voxelmanip or its data
-- Used for direct manipulation of the world chunk nodes where the
-- definitions of nodes are available and node callback can be executed
-- or e.g. for `minetest.fix_light`
for _, def in ipairs(Everness.on_generated_queue) do
if def.can_run(biomemap) and def.after_write_to_map then
shared_args[def.name] = shared_args[def.name] or {}
def.after_write_to_map(shared_args[def.name], gennotify)
end
end
-- Print generation time of this mapchunk.
-- local chugent = math.ceil((os.clock() - t0) * 1000)
-- print('[Everness] Mapchunk generation time ' .. chugent .. ' ms')
end)