Ruby Group Swap

Skastafari · 9 Jan 2015, 19:38

My latest challenge is converting imported named groups to their local Sketchup component counterpart. For example I have a group named TubLeft, and I will need to swap it with an already made component named TubLeft4. I am completely unsure how to do this with ruby and need some ideas. I have found it is easy to convert a group to a component, but that does not give me any of the dynamic attributes already in the corresponding component. I really just want to swap a group object by name with a component instance by its name. Any ideas would be much appreciated.

TIG · 9 Jan 2015, 21:28

Something like this:

gnames=['TubeLeft', 'TubeRight'. 'Widget']
cnames=['TubeLeft4', 'TubeRight4', 'MyBanana']
### or whatever arrays of group/component-definition names you want to swap from/to...
### We'll assume that we have previously imported the group[s] in a SKP, and
### you already have the replacement component-definition[s] loaded into the model definitions list...
model=Sketchup.active_model
defns=model.definitions
gnames.each_with_index{|gname, index| ### 'index' lets us find the matching 'cname'
  defns.to_a.each.collect{|d|
    d if d.group? && d.instances[0].name==gname ### collect matching group[s] definitions
  }.each{|g| ### in case more than one match !
    cname=cnames[index] ### note use of 'index'
    cdefn=defns[cnames[index]]
    g.instances.each{|i| i.definition=cdefn } if cdef ### i.e. we skip this IF no match !
  }
}

This processes the names in the two Arrays.
So it swaps all groups named 'TubeLeft' with a component-definition named 'TubeLeft4' etc...
IF they exist...

Skastafari · 13 Jan 2015, 18:58

I really like your idea. Keeping a list of group names and a corresponding list of component names will make managing my models really easy. I was trying to implement your method, and mostly failing. My template is set up with components already loaded, and the groups import with my geometry. I keep getting Error: #<LocalJumpError: no block given> and (eval):2536:in `each_with_index' I am still trying to figure out what I did wrong. If anything jumps out, let me know. The only thing I found was a period instead of a comma on gnames=[] I do really appreciate your time on this. I will continue working on it until I can get it running. I am thinking I better start making sure my origins match up on my groups and corresponding components. Thanks again TIG.

TIG · 13 Jan 2015, 19:56

Try this alternative:

gnames=['TubeLeft', 'TubeRight', 'Widget']
cnames=['TubeLeft4', 'TubeRight4', 'MyBanana']
### or whatever arrays of group/component-definition names you want to swap from/to...
### We'll assume that we have previously imported the group[s] in a SKP, and
### you already have the replacement component-definition[s] loaded into the model definitions list...
    model = Sketchup.active_model
    defns = model.definitions
    gnames.each_with_index{|gname, index| ### 'index' lets us find the matching 'cname'
      defns.to_a.each.select{|d|
        d.group? && d.instances[0].name == gname ### collect matching group[s] definitions
      }.each{|g| ### in case more than one match !
        cname = cnames[index] ### note use of 'index'
        cdefn = defns[cnames[index]]
        g.instances.each{|i| i.definition=cdefn } if cdef ### i.e. we skip this IF no match !
      }
    }

Sorry... but this is untested... but I just don't have time to test these fully right now...
If there's an error in the RC look at he line it indicates...

sdmitch · 13 Jan 2015, 22:16

@skastafari said:

I really like your idea. Keeping a list of group names and a corresponding list of component names will make managing my models really easy. I was trying to implement your method, and mostly failing. My template is set up with components already loaded, and the groups import with my geometry. I keep getting Error: #<LocalJumpError: no block given> and (eval):2536:in `each_with_index' I am still trying to figure out what I did wrong. If anything jumps out, let me know. The only thing I found was a period instead of a comma on gnames=[] I do really appreciate your time on this. I will continue working on it until I can get it running. I am thinking I better start making sure my origins match up on my groups and corresponding components. Thanks again TIG.

In addition to the period instead of a comma in the gnames array, the last line with 'if cdef' should be 'if cdefn'. But even with those corrections, it still fails for me with the following error 'undefined method definition=' for #<Sketchup::Group:0xc9c7710>'. Despite the API showing a 'group.definition' option, that also causes the error 'undefined method definition' for #Sketchup::Group:0xc9c7710.

My solution deletes the group and places the component using the group's transformation.

 mod = Sketchup.active_model
 ent = mod.active_entities
 sel = mod.selection
 gnames=['TubeLeft', 'TubeRight', 'Widget']
 cnames=['Bench', 'Couch', 'Nancy']
 mod.start_operation 'GroupSwap'
 ent.grep(Sketchup;;Group).each{|g| 
  ndx=gnames.index(g.name)
  if ndx
   c=mod.definitions[cnames[ndx]]; 
   if c
    gt=g.transformation;
    g.erase!
    ent.add_instance(c,gt)
   else
    puts "#{cnames[ndx]} not found"
   end
  end
 }
 mod.commit_operation

Before
After

TIG · 13 Jan 2015, 22:32

The '.' v ',' in the initial ' gnames' array was a stupid typo.
Also swap the typo:
... i.definition=cdefn } if cdef ### i.e. >>> ... i.definition=cdefn } if cdef**n** ### i.e.

Otherwise it ought to work [but, as yet untested... typed from memory ]

sdmitch · 14 Jan 2015, 02:54

TIG, I'm sure it will work as soon as Skastafari and I upgrade to 2015.

TIG · 14 Jan 2015, 12:41

You can mimic resetting a group's definition in earlier versions using alternatives - try this...

    gnames=['TubeLeft', 'TubeRight', 'Widget']
    cnames=['TubeLeft4', 'TubeRight4', 'MyBanana']
    ### or whatever arrays of group/component-definition names you want to swap from/to...
    ### We'll assume that we have previously imported the group[s] in a SKP, and
    ### you already have the replacement component-definition[s] loaded into the model definitions list...
        model = Sketchup.active_model
        defns = model.definitions
        gnames.each_with_index{|gname, index| ### 'index' lets us find the matching 'cname'
          defns.to_a.each.select{|d|
            d.group? && d.instances[0].name == gname ### collect matching group[s] definitions
          }.each{|g| ### in case more than one match !
            cname = cnames[index] ### note use of 'index'
            cdefn = defns[cnames[index]]
            g.instances.each{|i|
              i.parent.entities.add_instance(cdefn, i.transformation) ### place compo over group
              i.erase! ### remove original group
            } if cdefn ### i.e. we skip this IF no match !
          }
        }

Skastafari · 15 Jan 2015, 17:01

I was able to get some desirable results using most of sdmitch's code. Perhaps I am against some issues with my older license of Pro 8 that I was just not aware of (ruby 2.0 differences?) I am also having some new unforeseen issues with the origin points on my imported geometry. For some reason all imported groups are sharing the same origin. So it has become rather frustrating processing my models when all my components end up at what appears to be a global origin point for all imported groups (Using Fluid importer). I do think it is necessary to grab the transform from the group to apply to the component for proper placement of the component during the swap. Right now the only thing I can come up with to solve my problem would be to just first run another script that explodes each group, and then regroups it with the same name. Is there any easier way to reset a group's (transform) origin?

I really appreciate the ideas and feedback here, You guys have saved me from hours and hours of trial and error frustration already. The day to day grind of manually swapping out hundreds of groups with components is about as pleasurable as getting my teeth pulled. Thanks again, these ideas so far are more than I could have hoped for.

sdmitch · 15 Jan 2015, 18:38

@skastafari said:

I was able to get some desirable results using most of sdmitch's code. Perhaps I am against some issues with my older license of Pro 8 that I was just not aware of (ruby 2.0 differences?) I am also having some new unforeseen issues with the origin points on my imported geometry. For some reason all imported groups are sharing the same origin. So it has become rather frustrating processing my models when all my components end up at what appears to be a global origin point for all imported groups (Using Fluid importer). I do think it is necessary to grab the transform from the group to apply to the component for proper placement of the component during the swap. Right now the only thing I can come up with to solve my problem would be to just first run another script that explodes each group, and then regroups it with the same name. Is there any easier way to reset a group's (transform) origin?

I really appreciate the ideas and feedback here, You guys have saved me from hours and hours of trial and error frustration already. The day to day grind of manually swapping out hundreds of groups with components is about as pleasurable as getting my teeth pulled. Thanks again, these ideas so far are more than I could have hoped for.

Here is a link that should help with the "misplaced" origins.

http://sketchucation.com/forums/viewtopic.php?t=30508

Skastafari · 27 Jan 2015, 18:21

I have plugged away at the imported origin problem some more, I found that exploding imported groups is undesirable as it leaves behind unwanted vertices on your non-grouped objects when you regroup. I messed around writing an explode/regroup routine (it was buggy) and then I found a similar thread where TIG had an elegant less buggy explode/regroup solution using an array. it was something like...
sel = mod.selection groupArray=(sel[0].explode.find_all{|e|e if e.respond_to?(:bounds)}).uniq Sketchup.active_model.entities.add_group(groupArray)

That fixed the origin points, but I found that I cannot explode to get a new origin as it ruins ungrouped geometry in my model. I found that exploding is unnecessary and is only really a limitation of using SketchUp's interface, as there is no option to add a single group object inside another group. You would need to select at least 1 other object since the only options available in SU are "edit group", "make component", or "explode". With ruby I can just use add_group and I have a single group inside a group. Easy enough for me even with my limited ruby experience. Now I just need a way to get the name of each group add it to a new group with the same name. I need help with syntax for this.

The only potential problem I can see with this ide to reset origin is that perhaps SU won't like having a group inside a group of the same name. If it defaults to something like group_1 or something I can just update my "gname" to reflect that, hopefully that is the case.

I will check out that thread link sdmitch, thanks for your help.

Skastafari · 2 Feb 2015, 19:02

If anyone is interested, I finally solved my imported group's origin problem fairly simply with this...

ga = entities.grep(Sketchup::Group) ga.each { |e| n=e.name; e.model.entities.add_group(e); e.parent.instances[0].name=n}

Basically it just takes all the groups after import, adds them into a new group and names the new group the same name. This resets the origin, and allows the swap code to work properly.