Why can not draw the geometric by the ruby script?

[winzard]

require 'sketchup.rb'
def create_model()

  @lengthl=100.m if not @length1
  @widthl=50.m if not @widthl
  @number=4 if not @number
  @blength=10.m if not @blength
  @bwidth=5.m if not @bwidth
  @bheight=5.m if not @bheight
  @spacing=5.m if not @spacing
  prompts=["Length of Land; ","Width of Land; ","The Number of Building; ","Building Length; ","Building Width; ","Building Height; ","Building Spacing; "]###
  defaults=[@lengthl,@widthl,@number,@blength,@bwidth,@bheight,@spacing]
  input=UI.inputbox(prompts,defaults,[],"Create Model")
  return nil if not input 
  @lengthl,@widthl,@number,@blength,@bwidth,@bheight,@spacing=input
  amount=@number 
  model=Sketchup.active_model
  entities=model.active_entities 
  
  if @blength>@lengthl
    UI.messagebox('The Building Length is more than Length of Land!')
  elsif @bwidth>@widthl
    UI.messagebox('The Building Width is more than Width of Land!')
  else 
    model.start_operation("Create Model")### for the 'undo'
    x=0;y=0 ### also don't muddle the width/height !!!
  amount.times{|i|
      pt1=[x,y,0]###
      pt2=[x+@bwidth,y,0]###
      pt3=[x+@bwidth,y+@blength,0]###
      pt4=[x,y+@blength,0]###
      new_face=entities.add_face(pt1,pt2,pt3,pt4)
      new_face.pushpull(-@bheight)
      ### pushUpull typo !!! -ve = pull up as the face is reversed...
      y=y+@blength+@spacing ### set in a line
      x=x+@bwidth+@spacing   if y>@lengthl
      UI.messagebox('The area of land is inadequate !')  if x>@widthl
    } ###
  end #if##
  model.commit_operation ###
  
end#def ###
if not file_loaded?("2.rb") ### so only get menu item once...
  UI.menu("Plugins").add_item("Create Model2"){create_model} ###
end#if ###
file_loaded("2.rb") ###

I have difficult to the script,help me .Thanks!

[winzard]

The ruby script can not run in sketchup 6,but can run in sketchup 7.

[Chris Fullmer]

I'm not sure, it worked for me in both 6 and 7. Are you getting any errors in the ruby console?

Chris