Find the position of a group in the active context

dacastror

Hi, I'm trying to find the position of a group in the active context, relative to the coordinate system of the group that it contains (which itself can be contained within other groups), this picture illustrates the situation

You may also need to do this but with components. Really, I do not find the way to accomplish what I need, I appreciate your help
(google translator)

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sdmitch

A recent discussion might help

http://sketchucation.com/forums/viewtopic.php?f=180&t=49592

dacastror

thanks for replying, I saw this link, unfortunately I still do not understand how to solve my problem

sdmitch

The transformation of a sub-group will be relative to its parent so the sub-groups.transformation.origin will be the dx,dy,dz relative to the container group.

For example your model contains a group which contains another group then the following code would find the most embedded group and output its transformation.origin to the Ruby Console.

mod = Sketchup.active_model
ent = mod.active_entities
sel = mod.selection
grps=[];tran=[]
grps<<ent.grep(Sketchup;;Group)[0]
tran<<grps[0].transformation
begin
 fnd=false
 grps[-1].entities.each{|e|
  if e.class==Sketchup;;Group
   grps<<e;tran<<e.transformation
   fnd=true;break
  end
 }
end while fnd
puts grps[-1].transformation.origin

dacastror

Sdmitch thank you very much, unfortunately the problem persists when I'm in the active context, I'm trying something with this

mod = Sketchup.active_model 
path = mod.active_path
tr1 = Geom;;Transformation.new([0,0,0],[1,0,0],[0,1,0])
if path
  path.each{|entity|
     tr2 = entity.local_transformation
     tr1 = tr1*tr2
  }
end
tr1.origin

It works, but to play around with this in the least expected moment this fails. If it always worked, I would do something like this then

mod = Sketchup.active_model 
sel = mod.selection
path = mod.active_path
tr1 = Geom;;Transformation.new([0,0,0],[1,0,0],[0,1,0])
if path
  path.each{|entity|
     tr2 = entity.local_transformation
     tr1 = tr1*tr2
  }
end
origin_parent = Geom;;Vector3d.new(tr1.origin.to_a)

ejex_o = sel[0].transformation.xaxis
ejey_o = sel[0].transformation.yaxis
center = sel[0].local_bounds.center
tr3 = Geom;;Transformation.new([0,0,0], ejex_o, ejey_o)
center_tr = Geom;;Vector3d.new((center.transform tr3).to_a)
origin_group = Geom;;Vector3d.new(sel[0].transformation.origin.to_a)
point = origin_group - origin_parent + center_tr 
point_tr = point.transform tr1.inverse

here I have gained the center of the group with respect to the coordinate system of the parent in the active context. The problem is that it only works well sometimes,
I do not understand how to fix this
(google translator)

dacastror

I solved the problem, the key was to use "mod.edit_transform.origin"
I leave the code in case anyone needs it one day

mod = Sketchup.active_model sel = mod.selection parert_origin = mod.edit_transform.origin entity_origin = sel[0].transformation.origin distance = entity_origin-parert_origin tr = mod.edit_transform.inverse distance.transform tr