Modified version of TIG's "Export Vertices to CSV" script for SketchUp. The modifications make the script export vertices from all faces and edges present in the model (nested, unselected, or otherwise) with the relevant group and component level transformations applied. See http://sketchucation.com/forums/viewtopic.php?t=33956

exportvertices2csv.rb

=begin
(c) TIG 2011
http://sketchucation.com/forums/viewtopic.php?t=33956
Type exportvertices2csv in the Ruby Console.
Exports all Vertices is a Selection to a X,Y,Z 'CSV' file.
Edit sep="," if something other than a separating comma is desired e.g. ';'
Make sep="\t" if a TSV file is desired and change ext="csv" to ext="tsv".
It uses the current Model Units/accuracy with the approximate '~ ' and 
unit suffix [if any] removed; e.g. change Model Units to 'meters' 3dp to 
get exported csv in meters 1.234 - don't use 'fraction' 1' 2 1/2" formats, 
always use a 'decimal' format.
=end

=begin
JK 2016
- Added support for faces/edges nested in components and groups including
  application of relevant transform matrices
=end

# Dependencies ------------------------------

require 'sketchup.rb'


# Add to menu -------------------------------

unless file_loaded?( File.basename( __FILE__ ) )
	UI.menu("Plugins").add_item( "Export2Vertices" ){ exportvertices2csv() }
end
file_loaded( File.basename( __FILE__ ) )


# Helper functions ---------------------------

$verts = []

def getVerts( ents, transforms )

	# === By JK ===

	for e in ents

		# Base case
		if e.class == Sketchup::Face or e.class == Sketchup::Edge

			# Apply transforms
			if transforms.length > 0

				e.vertices.each do |vert|

					v = vert.position

					transforms.reverse_each do |transform|

						v = transform * v

					end#do

					$verts << v

				end#do

			# Else pass as is
			else

				e.vertices.each{ |vert| $verts << vert.position }

			end#if

		# Recursion case ... keep exploding until class is face/edge  
		elsif e.class == Sketchup::Group

			puts "Found a group: " + e.name + "\n"

			t = transforms.dup
			t << e.transformation
			puts "And it has this many transforms: " + t.length.to_s
			getVerts( e.entities, t )

		elsif e.class == Sketchup::ComponentInstance

			puts "Found a component: " + e.name + "\n"

			t = transforms.dup
			t << e.transformation
			puts "And it has this many transforms: " + t.length.to_s
			getVerts( e.definition.entities, t )

		end#if
	end
end


# Main --------------------------------------

def exportvertices2csv()

	sep = ","
	ext = ".csv"
	model = Sketchup.active_model

	# Original code ===
		# ss = model.selection
		# verts  = []	
		# ss.each{ |e| verts << e.vertices if e.class == Sketchup::Face or e.class == Sketchup::Edge }
	

	# Begin modified code, JK ===

		getVerts( model.entities, []  )
		verts = $verts

	# End modified code ===


	if not verts
		UI.messagebox( "No vertices were selected.\nExiting.")
		return nil
	end#if

	# Original code ===
		# verts.flatten!.uniq!
		# pts = []
		# verts.each{ |v| pts << v.position.x.to_s.gsub( /^~ /, '' ).to_f.to_s + sep +
		#                        v.position.y.to_s.gsub( /^~ /, '' ).to_f.to_s + sep +
		#                        v.position.z.to_s.gsub( /^~ /, '' ).to_f.to_s
		# }

	# Begin modified code, JK ===

		pts = []

		verts.each{ |v| pts << v.x.to_s.gsub( /^~ /, '' ).to_f.to_s + sep +
		                       v.y.to_s.gsub( /^~ /, '' ).to_f.to_s + sep +
		                       v.z.to_s.gsub( /^~ /, '' ).to_f.to_s
		}

		pts.uniq!

	# End modified code ===

	path = model.path

	if not path or path == ""
		path = Dir.pwd
		title = "Untitled"
	else
		path = File.dirname( path )
		title = model.title
	end#if

	ofile = File.join( path, title + '_verts' + ext ).tr( "\\", "/" )

	begin
		file = File.new( ofile, "w" )
	rescue # trap if open
		UI.messagebox( "Vertices file:\n\n\ " + ofile + "\n\nCannot be written - it's probably already open.\nClose it and try making it again...\n\n\Exiting..." )
		return nil
	end#rescue

	pts.each{ |pt| file.puts( pt ) }
	file.close

	puts ( pts.length.to_s ) + " vertices written to \n" + ofile

	begin
		UI.openURL( "file:///" + ofile )
	rescue
	end
end