mirror of
https://github.com/sbrl/Minetest-WorldEditAdditions.git
synced 2024-11-23 23:53:44 +01:00
61 lines
3.2 KiB
Lua
61 lines
3.2 KiB
Lua
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-- ███ ██ ██████ ██ ███████ ███████ █████ ██████ ██████ ██ ██ ██ ██████ ██████
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-- ████ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
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-- ██ ██ ██ ██ ██ ██ ███████ █████ ███████ ██████ ██████ ██ ████ █████ ██ ██
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-- ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
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-- ██ ████ ██████ ██ ███████ ███████ ██ ██ ██ ██ ███████ ██ ███████ ██████
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--- Similar to cubeapply, except that it takes 2 positions and randomly keeps changes based on a noise pattern.
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-- Takes a backup copy of the defined region, runs the given function, and then
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-- restores the bits that aren't above the nosie threshold.
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-- @param {Position} pos1 The 1st position defining the region boundary
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-- @param {Position} pos2 The 2nd positioon defining the region boundary
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-- @param {Function} func The function to call that performs the action in question. It is expected that the given function will accept no arguments.
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function worldeditadditions.noiseapply2d(pos1, pos2, threshold, scale, func)
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local time_taken_all = worldeditadditions.get_ms_time()
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pos1, pos2 = worldeditadditions.Vector3.sort(pos1, pos2)
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if not threshold then threshold = 0.5 end
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-- pos2 will always have the highest co-ordinates now
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-- Fetch the nodes in the specified area
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local manip_before, area_before = worldedit.manip_helpers.init(pos1, pos2)
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local data_before = manip_before:get_data()
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local time_taken_fn = worldeditadditions.get_ms_time()
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func()
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time_taken_fn = worldeditadditions.get_ms_time() - time_taken_fn
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local manip_after, area_after = worldedit.manip_helpers.init(pos1, pos2)
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local data_after = manip_after:get_data()
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local size2d = pos2 - pos1 + worldeditadditions.Vector3.new(1, 1, 1)
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print("DEBUG pos1", pos1, "pos2", pos2, "size2d", size2d)
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local success, noise = worldeditadditions.noise.make_2d(size2d, pos1, {
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algorithm = "perlinmt",
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scale = scale
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})
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if not success then return success, noise end
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for z = pos2.z, pos1.z, -1 do
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for y = pos2.y, pos1.y, -1 do
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for x = pos2.x, pos1.x, -1 do
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local i_before = area_before:index(x, y, z)
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local i_after = area_after:index(x, y, z)
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local i_noise = (z-pos1.z)*size2d.x + (x-pos1.x)
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-- Roll everything where the noise function returns less than 0.5
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if noise[i_noise] < threshold then
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data_after[i_after] = data_before[i_before]
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end
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end
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end
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end
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-- Save the modified nodes back to disk & return
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-- No need to save - this function doesn't actually change anything
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worldedit.manip_helpers.finish(manip_after, data_after)
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time_taken_all = worldeditadditions.get_ms_time() - time_taken_all
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return true, { all = time_taken_all, fn = time_taken_fn }
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end
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