Minetest-WorldEditAdditions/worldeditadditions_commands/commands/metaball.lua

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local wea = worldeditadditions
local Vector3 = wea.Vector3
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worldedit.register_command("metaball", {
params = "add <radius> | remove <index> | render <replace_node> [<threshold=1>] | list | clear | volume",
description = "Defines and creates metaballs. After using the add subcommand to define 1 or more metaballs (uses pos1), the render subcommand can then be used to create the metaballs as nodes.",
privs = { worldedit = true },
require_pos = 1,
parse = function(params_text)
if not params_text then params_text = "" end
local parts = wea.split_shell(params_text)
if #parts < 1 then
return false, "Error: Not enough arguments (see /help /dome for usage information)."
end
local subcommand = parts[1]
local subargs = {}
if subcommand == "delete" then subcommand = "remove" end
if subcommand == "deleteall" then subcommand = "clear" end
if subcommand == "append" then subcommand = "add" end
if subcommand == "list" then subcommand = "list" end
if subcommand == "make" then subcommand = "render" end
if subcommand == "generate" then subcommand = "render" end
if subcommand == "create" then subcommand = "render" end
if subcommand == "add" then
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if #parts < 2 then
return false, "Error: Not enough arguments."
end
local radius = tonumber(parts[2])
if not radius then
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return false, "Error: Invalid radius '"..parts[2].."'. The radius must be a positive integer."
end
if radius < 1 then
return false, "Error: The minimum radius size is 1, but you entered "..tostring(radius).."."
end
table.insert(subargs, radius)
elseif subcommand == "remove" then
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if #parts < 2 then
return false, "Error: Not enough arguments."
end
local index = tonumber(parts[2])
if not index then
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return false, "Error: Invalid index '"..parts[2].."'. The index to remove must be a positive integer."
end
if index < 1 then
return false, "Error: The minimum index size is 1, but you entered "..tostring(index).."."
end
table.insert(subargs, index)
elseif subcommand == "render" then
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if #parts < 2 then
return false, "Error: Not enough arguments."
end
local replace_node = worldedit.normalize_nodename(parts[2])
local threshold = 1
if not replace_node then
return false, "Error: Invalid replace_node '"..parts[2].."'."
end
if #parts >= 3 then
threshold = tonumber(parts[3])
if not threshold then
return false, "Error: The threshold value must be a valid number (a floating-point number is ok)."
end
end
table.insert(subargs, replace_node)
table.insert(subargs, threshold)
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elseif subcommand ~= "list" and subcommand ~= "clear" and subcommand ~= "volume" then
return false, "Error: Unknown subcommand '"..parts[1].."'."
end
return true, subcommand, subargs
end,
nodes_needed = function(name, subcommand)
if subcommand == "render" then
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return wea.metaballs.volume(name)
else
return 0
end
end,
func = function(name, subcommand, subargs)
local start_time = wea.get_ms_time()
local message = ""
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local append_time = false
if subcommand == "list" then
local success, list = wea.metaballs.list_pretty(name)
if not success then return success, list end
message = list
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elseif subcommand == "volume" then
local success, metaballs_list = wea.metaballs.list(name)
if not success then return success, metaballs_list end
local success2, volume = wea.metaballs.volume(name)
if not success2 then return success2, volume end
message = #metaballs_list.." will take up to "..tostring(volume).." nodes of space"
elseif subcommand == "clear" then
local success, metaballs_cleared = wea.metaballs.clear(name)
if not success then return success, metaballs_cleared end
message = tostring(metaballs_cleared).." cleared"
elseif subcommand == "remove" then
local index = subargs[1]
local success, metaballs_count = wea.metaballs.remove(name, index)
if not success then return success, metaballs_count end
message = "metaball at index "..tostring(index).." removed - "..metaballs_count.." metaballs remain"
elseif subcommand == "add" then
local pos = Vector3.clone(worldedit.pos1[name])
local radius = subargs[1]
local success, metaballs_count = wea.metaballs.add(name, pos, radius)
if not success then return success, metaballs_count end
message = "added metaball at "..pos.." with radius "..tostring(radius).." - "..metaballs_count.." metaballs are now defined"
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append_time = false
elseif subcommand == "render" then
local replace_node = subargs[1]
local threshold = subargs[2]
local success, metaballs = wea.metaballs.list(name)
if not success then return success, metaballs end
if #metaballs < 2 then
return false, "Error: At least 2 metaballs must be defined to render them."
end
local success2, nodes_replaced = wea.metaballs.render(metaballs, replace_node, threshold)
if not success2 then return success2, nodes_replaced end
message = nodes_replaced.." nodes replaced using "..tostring(#metaballs).." metaballs"
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append_time = true
end
local time_taken = wea.get_ms_time() - start_time
if append_time then
message = message.." in "..wea.format.human_time(time_taken)
end
minetest.log("action", name.." used //metaballs "..subcommand.." in "..wea.format.human_time(time_taken))
return true, message
end
})