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https://github.com/sbrl/Minetest-WorldEditAdditions.git
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1310dae884
This is just the start, if my plans work out. The eventual aim here is to implement a generic Heightmap2D class, just like Vector3. This will make interacting with heightmaps much easier.
61 lines
1.9 KiB
Lua
61 lines
1.9 KiB
Lua
local wea = worldeditadditions
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wea.erode = {}
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dofile(wea.modpath.."/lib/erode/snowballs.lua")
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dofile(wea.modpath.."/lib/erode/river.lua")
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function wea.erode.run(pos1, pos2, algorithm, params)
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pos1, pos2 = worldedit.sort_pos(pos1, pos2)
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local manip, area = worldedit.manip_helpers.init(pos1, pos2)
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local data = manip:get_data()
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local heightmap_size = {
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z = (pos2.z - pos1.z) + 1,
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x = (pos2.x - pos1.x) + 1
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}
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local region_height = (pos2.y - pos1.y) + 1
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local heightmap = wea.terrain.make_heightmap(pos1, pos2, manip, area, data)
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local heightmap_eroded = wea.table.shallowcopy(heightmap)
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-- print("[erode.run] algorithm: "..algorithm..", params:");
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-- print(wea.format.map(params))
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-- wea.format.array_2d(heightmap, heightmap_size.x)
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local success, msg, stats
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if algorithm == "snowballs" then
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success, msg = wea.erode.snowballs(
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heightmap, heightmap_eroded,
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heightmap_size,
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region_height,
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params
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)
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if not success then return success, msg end
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elseif algorithm == "river" then
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success, msg = wea.erode.river(
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heightmap, heightmap_eroded,
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heightmap_size,
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region_height,
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params
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)
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if not success then return success, msg end
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else
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-- FUTURE: Add a new "river" algorithm here that:
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-- * Fills in blocks that are surrounded on more than 3 horizontal sides
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-- * Destroys blocks that have no horizontal neighbours
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-- A bit like cellular automata actually.
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return false, "Error: Unknown algorithm '"..algorithm.."'. Currently implemented algorithms: snowballs (2d; hydraulic-like), river (2d; cellular automata-like; fills potholes and lowers towers). Ideas for algorithms to implement are welcome!"
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end
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success, stats = wea.terrain.apply_heightmap_changes(
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pos1, pos2, area, data,
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heightmap, heightmap_eroded, heightmap_size
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)
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if not success then return success, stats end
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worldedit.manip_helpers.finish(manip, data)
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return true, msg, stats
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end
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