I was messing around with the idea of exporting simple 2d geometry to a dwg for later use by Autocad.

This is what I came up with. I just started with Sketchup today and downloaded the Pro demo but work with Autocad daily (2d & 3d). Anyways this seems to work, I'm not sure if this is a proper way of going about it.

def exportmodel
   #Save existing drawing temporarily to come back after processing others
	Sketchup.active_model.save "temp1.skp"
   Sketchup.file_new
		
	model = Sketchup.active_model	
	exportlayer = model.layers.add "Samplelayer"	

	pts = []
	pts[0] = [0,0,0]
	pts[1] = [10,0,0]
	pts[2] = [10,10,0]
	pts[3] = [0,10,0]
	
	rect = model.entities.add_face pts
	rectlines = rect.edges
	
	i = 0
	4.times do
		rectlines[i].layer = exportlayer
		i += 1
	end

   #creating a face and then deleting it to leave just the edges/lines seemed 
   #slightly easier than creating the edges on their own, maybe this is a bad idea.
	rect.erase!	

	model.export "c;\\sample.dwg"
   #save just so I don't get a file close dialog
	model.save "temp.skp"
	#restore previous drawing
	Sketchup.open_file "temp1.skp"
end

The ultimate end goal would be to generate multiple 2d component dwg parts from a sketchup 3d model. I just wanted to make sure it would work in theory before I got to far into it.

Thanks