Exportvertices2csv.rb as a teaching material

tetsuyahishida

Hi

I'm now studying Ruby Code and using TIG's
"exportvertices2csv"as a teaching material.

I think TIG is putting all the code in initialize,in order to make the code simple.
Although I know that is a wise way. I'm now practicing to rapping it in instance method.

In order to devide it in to "initialize part" and "outputting csv part"
I've wrote these code.


=begin
(c) TIG 2011
Type
  Exportvertices2csv.new
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.
1.0 20110105 First issue.
1.1 20110116 Wrapped in protective class.
=end
require 'sketchup.rb'
###
class Exportvertices2csv
def printcsv(verts)
    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}
    model=Sketchup.active_model
    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\nExiting...")
    return nil
    end
    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#def
def initialize()
    sep="," ### <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
    ext="csv" ### <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
    model=Sketchup.active_model
    ss=model.selection
    verts=[]
    ss.each{|e|verts << e.vertices if e.class==Sketchup;;Face or e.class==Sketchup;;Edge}
    if not verts
      UI.messagebox("No Vertices were Selected.\nExiting.")
	  return nil
    end#if
    verts.flatten!.uniq!
    self.printcsv(verts)
end #def


end#class
###

but recieve this error message.

Exportvertices2csv.new
Error: #<NoMethodError: undefined method `printcsv' for #Array:0xde0858c>

does someone have any idea?

Sincerely yours

Chris Fullmer

line 58

self.printcsv(verts)

change to

printcsv(verts)

my head can't think this through though, and it might need to be

Exportvertices2csv.printcsv(verts)

So try one of those, or maybe someone else will come through and help refine my answer

Dan Rathbun

line 53 ( verts is not a boolean object.)
Should be: if verts.empty?

Dan Rathbun

@chris fullmer said:

line 58

self.printcsv(verts)

change to

printcsv(verts)

Correct Chris. The method is an instance method.

BUT.. this code is a perfect example of something that should be a module, and not a class.

tetsuyahishida

Thankyou all!
The problem was solved.

Dan Rathbun

Do you mean the whole class "Exportvertices2csv"
should be a module?
Or, the instance method "printcsv"should be a module?