lerpTable.lua

function lerpTable(delta, table)
    -- assume table is sorted according to order
    local peak = #table
    for index = 1,#table do
        if table[index][1] >= delta then
            peak = index
            break
        end
    end
    
    if peak == 1 or delta >= table[peak][1] then
        return table[peak][2]
    else
        local range = table[peak][1] - table[peak - 1][1]
        delta = math.max(math.min((delta - table[peak - 1][1]) / range, 1), 0)
        return table[peak][2] * delta + table[peak - 1][2] * (1 - delta)
    end
end