Minetest-WorldEditAdditions/worldeditadditions_commands/commands/convolve.lua

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worldedit.register_command("convolve", {
params = "<kernel> [<width>[,<height>]] [<sigma>]",
description = "Advanced version of //smooth from we_env. Convolves over the defined region with the given kernel. Possible kernels: box, pascal, gaussian. The width & height (if specified) must be odd integers. If the height is not specified, it defaults to the width. gaussian should give the smoothest result, but the width & height must be identical. The sigma value is only applicable to gaussian kernels, and can be thought of as the 'smoothness' to apply.",
privs = { worldedit = true },
require_pos = 2,
parse = function(params_text)
if not params_text then params_text = "" end
local parts = worldeditadditions.split(params_text, "%s+", false)
local kernel_name = "gaussian"
local width = 5
local height = 5
local sigma = nil
if #parts >= 1 and #parts[1] > 0 then
kernel_name = parts[1]
end
if #parts >= 2 then
local parts_dimension = worldeditadditions.split(parts[2], ",%s*", false)
width = tonumber(parts_dimension[1])
if not width then
return false, "Error: Invalid width (it must be a positive odd integer)."
end
if #parts_dimension >= 2 then
height = tonumber(parts_dimension[2])
if not height then
return false, "Error: Invalid height (it must be a positive odd integer)."
end
else
height = width
end
end
if #parts >= 3 then
sigma = tonumber(parts[3])
if not sigma then
return false, "Error: Invalid sigma value (it must be a valid number - floating point numbers are allowed)"
end
end
return true, kernel_name, math.floor(width), math.floor(height), sigma
end,
nodes_needed = function(name)
return worldedit.volume(worldedit.pos1[name], worldedit.pos2[name])
end,
func = function(name, kernel_name, kernel_width, kernel_height, sigma)
local start_time = worldeditadditions.get_ms_time()
local success, kernel = worldeditadditions.get_conv_kernel(kernel_name, kernel_width, kernel_height, sigma)
if not success then return success, kernel end
local kernel_size = {}
kernel_size[0] = kernel_height
kernel_size[1] = kernel_width
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local stats
success, stats = worldeditadditions.convolve(
worldedit.pos1[name], worldedit.pos2[name],
kernel, kernel_size
)
if not success then return success, stats end
local time_taken = worldeditadditions.get_ms_time() - start_time
minetest.log("action", name.." used //convolve at "..worldeditadditions.vector.tostring(worldedit.pos1[name]).." - "..worldeditadditions.vector.tostring(worldedit.pos2[name])..", adding "..stats.added.." nodes and removing "..stats.removed.." nodes in "..time_taken.."s")
return true, "Added "..stats.added.." and removed "..stats.removed.." nodes in " .. worldeditadditions.format.human_time(time_taken)
end
})