Minetest-WorldEditAdditions/worldeditadditions/lib/erode/erode.lua

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worldeditadditions.erode = {}
dofile(worldeditadditions.modpath.."/lib/erode/snowballs.lua")
function worldeditadditions.erode.run(pos1, pos2, algorithm, params)
pos1, pos2 = worldedit.sort_pos(pos1, pos2)
local manip, area = worldedit.manip_helpers.init(pos1, pos2)
local data = manip:get_data()
local heightmap_size = {}
heightmap_size[0] = (pos2.z - pos1.z) + 1
heightmap_size[1] = (pos2.x - pos1.x) + 1
local region_height = (pos2.y - pos1.y) + 1
local heightmap = worldeditadditions.make_heightmap(pos1, pos2, manip, area, data)
local heightmap_eroded = worldeditadditions.shallowcopy(heightmap)
-- print("[erode.run] algorithm: "..algorithm..", params:");
-- print(worldeditadditions.map_stringify(params))
-- worldeditadditions.print_2d(heightmap, heightmap_size[1])
local success, msg, stats
if algorithm == "snowballs" then
success, msg = worldeditadditions.erode.snowballs(heightmap, heightmap_eroded, heightmap_size, region_height, params)
if not success then return success, msg end
else
return false, "Error: Unknown algorithm '"..algorithm.."'. Currently implemented algorithms: snowballs (2d; hydraulic-like). Ideas for algorithms to implement are welcome!"
end
success, stats = worldeditadditions.apply_heightmap_changes(
pos1, pos2, area, data,
heightmap, heightmap_eroded, heightmap_size
)
if not success then return success, stats end
worldedit.manip_helpers.finish(manip, data)
return true, msg, stats
end