How to merge groups

Developers Ruby API
#1

Dear friends,

       for i in 0...tsn
         s_grp2 = s_grp.copy
         s_pt = [0, 0, (i + 1) * delta]
         tr = Geom::Transformation.new s_pt
         s_grp2.transform! tr
       end

Codes make some groups from first one. Now I wish to have all of these groups as one group. How can I do it? This is general question to merge some groups together. I can also explode all of groups also I can move then to a especial layer but I don’t know how can I add all of entities in one group? Thank you in advance for your help.

#2

Something like this… (Not tested)

# Will merge the groups 
# Paramater (Array<Sketchup::Group>) 
#   if nothing is specified all group will
#   be merged in active context
# Returns: <Sketchup::Entities>
def merge_groups( groups = Sketchup.active_model.active_entities.grep(Sketchup::Group) )
  model = Sketchup.active_model
  ents = model.active_entities
  merged_group = ents.add_group( groups.each{|g| g.entities} )
  merged_group.entities.each{ |e| e.explode if e.respond_to?(:explode) }
end
#usage example
merge_groups
#or
merge_groups([s_grp, s_grp2])
2 Likes
#3

Dear Dezmo,
You codes work right and at the end we will have one group just one problem. explode make codes too slow even more than 10 second for a normal usage. Can you suggest another faster solution?

#4

Not really.
However just an idea, you can try:
If you are wrapping to undo stack with disabled UI - which you must to do anyway on a “full” code where you make modell geometry changes - maybe helps a little…
Model#start_operation-instance_method (The second parameter must be true )

# Paramater (Array<Sketchup::Group>) 
#   if nothing is specified all group will
#   be merged in active context
# Returns: <Sketchup::Entities>
def merge_groups( groups = Sketchup.active_model.active_entities.grep(Sketchup::Group) )
  model = Sketchup.active_model
  ents = model.active_entities

  model.start_operation('Merge Groups', true)

  merged_group = ents.add_group( groups.each{|g| g.entities} )
  merged_group.entities.each{ |e| e.explode if e.respond_to?(:explode) }

  model.commit_operation
end
#usage example
merge_groups
#or
merge_groups([s_grp, s_grp2])
#5

I did it before and takes more than 10 second. Also used following code but same result.

        groups = []
        groups << s_grp
        for i in 0...tsn
          s_grp2 = s_grp.copy
          s_pt = [0, 0, (i + 1) * delta]
          tr = Geom::Transformation.new s_pt
          s_grp2.transform! tr
          groups << s_grp2
        end
        ents = Sketchup.active_model.active_entities
        merged_group = ents.add_group( groups.each{|g| g.entities} )
#        merged_group.entities.each{ |e| e.explode if e.respond_to?(:explode) }
        merged_group.entities.grep(Sketchup::Group) { |g| g.explode }

Delay for an average usage is too much even user think SU is terminated. Maybe from beginning I should make all in one group. Let me try for it. Always your solution teach me something new. Thank you so much for it.

#6

Yea. That is the best you can do, for efficiency… :wink:

1 Like
#7

This snippet is the same as …

merged_group = ents.add_group( groups )

… because #each just returns the receiver collection (in this case the groups array.)

The delay is probably due to the merging of geometry after each explode.

2 Likes