local AnimateScatter = {}

    -- variables declared in the script scope are visible for all functions in our
    -- script for as long as the scripted graph is not deleted or reloaded (in
    -- programming terms, our two functions become "closures").
    local inputs, scatter

    

    -- onInit function, this is called once in the beginning.
    function AnimateScatter.onInit(self, graph)

        -- evaluate on time change
        self:setEvaluateTimeChanges(true)

        -- input and output infos
        local inputInfos = {
            {label = "first_file", type = octane.PT_STRING, defaultNodeType=octane.NT_FILE, filePattern="*.txt"},
            {label = "geometry", type = octane.PT_GEOMETRY}
        }
        
        local outputInfos = {
            {label = "geometry", type = octane.PT_GEOMETRY}
        }



        -- GET THE SEQUENCE NUMBER OF THE TEXT FILE LOADED, WITH SOMETHING LIKE:


            -- check if we have a file name given
        local prefix, sequenceMatch, suffix
        
        -- If we have a file name, check where to substitute the sequence number:
        -- pattern tutorial here: http://lua-users.org/wiki/PatternsTutorial
        if file ~= "" then
        
            -- strip png extension
            file = file:gsub("%.txt$", "")

            -- split file into prefix, sequence number and suffix
            -- make sure the sequence number is in the final file name part
            prefix, sequenceMatch, suffix = file:match("(.-)(%d+)([^\\/]*)$")
            
            -- if the file name doesn't contain a sequence number, the match fails
            -- so just assume it is all prefix.
            if sequenceMatch == nil then
                prefix = file
                sequenceMatch = "00000"
                suffix = ""
            end

            -- pattern for string.format.
            seqPattern = "%0"..sequenceMatch:len().."d"
            
            -- add png extension
            suffix = suffix..".txt"
            
            -- display resulting file name
            fileEditor.text = prefix..sequenceMatch..suffix
        end
        


        -- use these functions to set up input and output linkers. This will keep
        -- existing linkers so existing connections in the parent graph are kept.
        inputs = graph:setInputLinkers(inputInfos)
        local outputs = graph:setOutputLinkers(outputInfos)
        
        -- set up a node to give the graph some output value
        scatter = octane.node.create{ type=octane.NT_GEO_SCATTER, name="scatter", graphOwner=graph }
        outputs[1]:connectTo("input", scatter)
    end

    -- this function is called every time the value of an input linker changes
    function AnimateScatter.onEvaluate(self, graph)



        -- GET THE CURRENT FRAME AND LOOK FOR A FILE WITH THAT SEQUENCE NUMBER

        ??



        -- IF IT EXISTS, LOAD IT INTO NT_GEO_SCATTER 

        ??


        -- OUTPUT THE SCATTERED GEOMETRY TO THE OUTPUT PIN

        ??


    end

    return AnimateScatter