mirror of
https://github.com/sbrl/Minetest-WorldEditAdditions.git
synced 2024-11-09 00:43:48 +01:00
53 lines
2.0 KiB
Lua
53 lines
2.0 KiB
Lua
local wea_c = worldeditadditions_core
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local Vector3 = wea_c.Vector3
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--- Holds the per-user selection stacks.
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worldeditadditions.sstack = {}
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local sstack_max = 100
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--- Calculates the height of the selection stack for the defined user.
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-- If the defined user doesn't yet have a stack, a value of 0 is returned.
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-- @param user string The name of the user to count the size of the selection stack for.
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-- @return number The number of items on the stack for the given user.
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function worldeditadditions.scount(name)
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if not worldeditadditions.sstack[name] then
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return 0
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end
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return #worldeditadditions.sstack[name]
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end
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--- Inserts a selection region onto the stack for the user with the given name.
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-- Stacks are per-user.
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-- @param name string The name of the user to insert onto.
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-- @param pos1 Vector3 Position 1
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-- @param pos2 Vector3 Position 2
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function worldeditadditions.spush(name, pos1, pos2)
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pos1 = Vector3.clone(pos1)
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pos2 = Vector3.clone(pos2)
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if not worldeditadditions.sstack[name] then
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worldeditadditions.sstack[name] = {}
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end
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-- Checck the stack height
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if #worldeditadditions.sstack[name] > sstack_max then
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return false, "Error: Selection stack height of "..sstack_max.." would be exceeded by pushing a new selection onto the stack now."
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end
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table.insert(worldeditadditions.sstack[name], { pos1, pos2 })
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return true
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end
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--- Pops a selection region off the stack for the given user.
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-- Stacks are per-user.
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-- @param name string The name of the user to remove a selection region off the stack for.
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-- @return bool,Vector|string, Vector A bool true/false indicating success, followed by either a error message as a string if false or a pair of Vectors for the pos1 and pos2 from the item popped from the stack respectively.
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function worldeditadditions.spop(name)
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if not worldeditadditions.sstack[name] or #worldeditadditions.sstack[name] == 0 then
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return false, "Error: The stack for user "..name.." is empty, so can't remove anything from it."
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end
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local item = table.remove(worldeditadditions.sstack[name])
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return true, item[1], item[2]
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end
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