Ruby : Get dimensions of a transformed element

nicoiweins

Hi there,

I have a problem with dimensions of a group which has been transformed with the scale tool
(or the edges of a group)

before and after the transformation, I get the same dimensions.

here is my script :

myEdges= []
entGroup = myGroup.entities
entGroup .each do |e|
  if e.is_a? Sketchup;;Edge
    myEdges<< e.length
  end
end
puts myEdges

Is there a better way to get my dimensions using Ruby?

using boundingbox I have the same problem

bbox = myGroup.local_bounds
widthBox = bbox.width
depthBox = bbox.depth
heightBox = bbox.height

Thanks for your help

Nicolas

TIG

You need to take into account the transformation of the group when looking at distances, thus:

g=Sketchup.active_model.selection[0]; g.entities.grep(Sketchup;;Edge).each{|e| p (e.start.position.transform(puts; g.transformation).vector_to(e.end.position.transform(g.transformation))).length ; p e.length}; puts;

Make a group [say a square that's 10 inches], make a copy, scale one of those groups, select the original sized one, paste this code in the Ruby Console + <enter>.

Then repeat the selection and code for the scaled one.

Your output for each is in pairs - the transformed distance between each vertex and the edge length.
The unscaled one returns matching pairs, but the scaled one gives the transformed distance and the original length...

nicoiweins

OK it seems great and for a bounding box?

nicoiweins

Thank you TIG for your help

I wrote this function

def getLength pt1,pt2,myGroup
  myLength =  (pt1.transform(myGroup.transformation).vector_to(pt2.transform(myGroup.transformation))).length
  return myLength 
end

#    # for the boundingbox of the group myGroup
#    width = getLongueur bbox.corner(0),bbox.corner(1),myGroup
#    depth = getLongueur bbox.corner(0),bbox.corner(2),monGroup
#    height = getLongueur bbox.corner(0),bbox.corner(4),monGroup

#    # for a edge myEdge of the group myGroup
#    length = getLongueur myEdge.start.position,myEdge.end.position,myGroup

Dan Rathbun

@nicoiweins said:

OK it seems great and for a bounding box?

use
group_instance.bounds()
which is inherited from Sketchup::Drawingelement, the superclass of Sketchup::Group (and most all model objects that are seen.) Even more model objects are descended from Sketchup::Entity, including Sketchup::Drawingelement. Each Ruby class inherits from it's ancestor classes.