worldeditadditions.erode = {} dofile(worldeditadditions.modpath.."/lib/erode/snowballs.lua") dofile(worldeditadditions.modpath.."/lib/erode/river.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 = { z = (pos2.z - pos1.z) + 1, x = (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.table.shallowcopy(heightmap) -- print("[erode.run] algorithm: "..algorithm..", params:"); -- print(worldeditadditions.format.map(params)) -- worldeditadditions.format.array_2d(heightmap, heightmap_size.x) 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 elseif algorithm == "river" then success, msg = worldeditadditions.erode.river( heightmap, heightmap_eroded, heightmap_size, region_height, params ) if not success then return success, msg end else -- FUTURE: Add a new "river" algorithm here that: -- * Fills in blocks that are surrounded on more than 3 horizontal sides -- * Destroys blocks that have no horizontal neighbours -- A bit like cellular automata actually. 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!" 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