Minetest-WorldEditAdditions/worldeditadditions/lib/wireframe/corner_set.lua

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-- ██      ██    ██ ██████  ██ ██  ██ █████   ██████      ███████ █████      ██
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--- Puts a node at each corner of selection box.
-- @param	{Position}	pos1	The 1st position defining the WorldEdit selection
-- @param	{Position}	pos2	The 2nd positioon defining the WorldEdit selection
-- @param	{string}	node	Name of the node to place
function worldeditadditions.corner_set(pos1,pos2,node)
	
	-- z y x is the preferred loop order (because CPU cache I'd guess, since then we're iterating linearly through the data array)
	local counts = { replaced = 0 }
	for i,z in pairs({pos1.z,pos2.z}) do
		for j,y in pairs({pos1.y,pos2.y}) do
			for k,x in pairs({pos1.x,pos2.x}) do
				minetest.set_node(vector.new(x,y,z), {name=node})
				counts.replaced = counts.replaced + 1
			end
		end
	end
	
	return true, counts.replaced
end