[solved]Syntax problem with a Sketchup::Face

[Iltis]

Hello,

Could you tell me what's wrong in this code?
(Z is a parameter. If z=0, I want only the faces in the Z=0 plane)

selection.each do |entity|    
      if entity.is_a?(Sketchup;;Face)
				 if z == 1 || (z == 0 && entity.normal.x.abs < 0.00001 && entitiy.normal.y.abs < 0.00001 && entity.vertices[0].z.abs < 0.000001 ) # Sketchup tolerance ; 0.0001 inch)
					  ........

In the Ruby console :
Error: #<NameError: undefined local variable or method `entitiy'

Thank you for your help.
BR,
Renaud.

[Iltis]

OK, it's a typo! entitiy instead of entity! Shame on me!

[TIG]

A common thing !
I often do it.

You could simplify your code thus:

selection.grep(Sketchup;;Face).each{|face|   
  if face.normal.parallel?(Z_AXIS)
    ###...
  end
}

This collects all selected faces and if they are 'flat' you do something...
The parallel? check has built-in tolerance...

[Iltis]

Thanks TIG!