#convert skp to obj
#every thumb is putted in a created dir with name of related skp model's name
#skppath is the residence of skpfiles

require 'sketchup.rb' 
if(not file_loaded?("skp2obj.rb")) 
    plugins_menu = UI.menu("Plugins") 
    plugins_menu.add_item("skp2obj") {file_export} 
end 
file_loaded("skp2obj.rb") 


def file_export 

#skp file path
#beware the end "/" e.g. skppath ="i;/skp/skptest/model/error/"
skppath ="i;/tt/"

#open dir and loop all skps
dir = Dir.open(skppath)
begin
  dir.each {|x|
    	next if x !~ /\.skp$/i 
    	x = "#{x}"
    	sourcefile = skppath+x
    	x = x[0,x.length-4]
    	destdir = skppath + x + "/"
    	destfile = destdir + x +".obj"

			#mak dir
    	Dir.mkdir(destdir)
    	
    	#open modle file
    	Sketchup.file_new
			status = Sketchup.open_file sourcefile
			if (!status) 
           UI.messagebox "error; " + sourcefile
      end
      
      #export obj
			status = Sketchup.active_model.export destfile
			if (!status) 
           UI.messagebox "error; " + sourcefile
      end
    }
ensure
  dir.close
end

    UI.messagebox "Finished" 
end