sketchup_exportFbx.rb

def exportFbx(filename)
    if Sketchup.open_file(filename) then
        model = Sketchup.active_model
        dir = File.dirname(filename)
        basename = File.basename(filename,'.*')    
        #model.save_thumbnail "#{dir}/#{basename}.png"
        model.export "#{dir}/#{basename}.fbx", false
    else
        puts "Failed to Load fbx."
    end
end

def exportDir(path)
    Dir[path + '/*'].sort.each do |name|
        puts name
        if File.file?(name) and name[/.+\.skp$/]
            exportFbx(File.expand_path(name))
        elsif File.directory?(name)
            exportDir(name)
        end
    end
end

exportDir('c:/project/sketchup/model')