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worldeditadditions.add_pos = {}
worldeditadditions.selection = {}
function worldeditadditions.selection.add_point(name, pos)
	if pos ~= nil then
		local is_new = not worldedit.pos1[name] and not worldedit.pos2[name]
		-- print("[set_pos1]", name, "("..pos.x..", "..pos.y..", "..pos.z..")")
		if not worldedit.pos1[name] then worldedit.pos1[name] = vector.new(pos) end
		if not worldedit.pos2[name] then worldedit.pos2[name] = vector.new(pos) end
		
		worldedit.marker_update(name)
		
		local volume_before = worldedit.volume(worldedit.pos1[name], worldedit.pos2[name])
		
		worldedit.pos1[name], worldedit.pos2[name] = worldeditadditions.vector.expand_region(worldedit.pos1[name], worldedit.pos2[name], pos)
		
		local volume_after = worldedit.volume(worldedit.pos1[name], worldedit.pos2[name])
		
		local volume_difference = volume_after - volume_before
		
		worldedit.marker_update(name)
		print("DEBUG volume_before", volume_before, "volume_after", volume_after)
		if is_new then
			local msg = "Created new region of "..volume_after.." node"
			if volume_after ~= 1 then msg = msg.."s" end
			worldedit.player_notify(name, msg)
		else
			local msg = "Expanded region by "..volume_difference.." node"
			if volume_difference ~= 1 then msg = msg.."s" end
			worldedit.player_notify(name, msg)
		end
	else
		worldedit.player_notify(name, "Error: Too far away (try raising your maxdist with //farwand maxdist <number>)")
		-- print("[set_pos1]", name, "nil")
	end
end
function worldeditadditions.selection.clear_points(name)
	worldedit.pos1[name] = nil
	worldedit.pos2[name] = nil
	worldedit.marker_update(name)
	worldedit.set_pos[name] = nil
	
	worldedit.player_notify(name, "Region cleared")
end