Components

thomthom

if e.typename == "ComponentInstance"

.typename is slow - very slow.
.is_a? is much quicker.
if e.is_a?(Sketchup::ComponentInstance)

honoluludesktop

Thomas, Thanks, I now recall reading that somewhere.

Chris, I understand the logic, but so far can't find the correct procedure. Will work on it tomorrow:-(

Chris Fullmer

I have never written a script that has to mine down through all the components the way I've vaguely described. So I'm sure i've missed some key things.

Chris

TIG

You can get a component-instance.
You can get that component-instance's definition.
You can get a component-definition.
You can get that component-definition's instances.
A group is a special kind of instance.
There is no built in method to get a group's definition - but it can be done in a convoluted way - there are other threads on this - group.real_parent will return it as below...


class Sketchup;;Group
  # Some times the group.entities.parent refer to the wrong definition. This method checks for this error and locates the correct parent definition.
  def real_parent
    if self.entities.parent.instances.include?(self)
      return self.entities.parent
    else
      Sketchup.active_model.definitions.each { |definition|
        return definition if definition.instances.include?(self)
      }
    end#if
    return nil # Should not happen.
  end#def
end#class

A model has entities.
A group has entities.
A component-definition has entities.
A component-instance does not have entities - you must refer to its component-definition for these.

Hope that's clear

thomthom

@honoluludesktop said:

Is there a way to extract the information regarding the 2 original components, from the one that they are made into? I have tried but failed to do so.

What "information" are you looking for? What are you trying to do?

@honoluludesktop said:

Is there another procedure that I can use to find all the component instances other then by definitions?

You could scan the whole model, but that would be very inefficient. looping through model.definitions and getting the instances for each definition is the fastest and most efficient way to get to all the model's instances.

thomthom

@honoluludesktop said:

Is there another procedure that I can use to find all the component instances other then by definitions?

If you already have a reference to a component instance, and you want to find the other instance, then: myInstance.definition.instances

RickW

@thomthom said:

@honoluludesktop said:

if e.typename == "ComponentInstance"

.typename is slow - very slow.
.is_a? is much quicker.
if e.is_a?(Sketchup::ComponentInstance)

I think I remember reading that
e.instance_of? Sketchup::ComponentInstance
is even faster.

@thomthom said:

You could scan the whole model, but that would be very inefficient. looping through model.definitions and getting the instances for each definition is the fastest and most efficient way to get to all the model's instances.

I concur. While recursion is elegant from a coding standpoint, it's grossly inefficient and prone to crashing SU. Best to find what you're looking for in the definitions.instances.

honoluludesktop

TIG, do I get it?
A component-instance, and that component-instance's definition.


model = Sketchup.active_model
selection = model.selection
selection.each do |i|
  if i.is_a? Sketchup;;ComponentInstance
    puts i.definition.name
  end
end

A component-definition, and that component-definition's instances.


model = Sketchup.active_model
model.definitions.each do |d|
  d.instances.each do |i|
    puts i.definition.name
  end
end

A model has entities.


model = Sketchup.active_model
model.entities.each do |e|
  puts e.typename
end

A component-definition has entities.


model = Sketchup.active_model
model.definitions.each do |d|
  d.entities.each do |i|
    puts i.typename
  end
end

Haven't worked with groups yet.

See image below, I am still unable to get the name of the component (small boxA within the big boxB) within a selection of the component that is both (boxC).

Thomas:
Am doing 2 things: First going through the API trying to learn how to ruby, and also trying to get a list of entities (including sub components) that are inside a specific component. Is myInstance.definition.instances what I have above?

RickW:
Good tips.

TIG

You missed out the variant...


    model = Sketchup.active_model
    selection = model.selection
    selection.each do |i|
      if i.is_a? Sketchup;;ComponentInstance
        i.definition.entities.each{|ent|
          puts ent.class
        }
      end
    end

This will show you that you can find component-instances inside a component, then you can get the instance's definition and then that's entities etc... If you have nested items you need to do make a 'def' that's reused to iterate through them...


...
      if i.is_a? Sketchup;;ComponentInstance
        i.definition.entities.each{|ent|
         if ent.is_a? Sketchup;;ComponentInstance
           ent.definition.entities.each{|dent|
             puts dent.class
             ###etc
           }
         end
        }
      end
...

honoluludesktop

TIG, Got it, thanks:

model = Sketchup.active_model
selection = model.selection
selection.each do |i|
  puts "Component(s)"
  if i.is_a? Sketchup;;ComponentInstance
	puts i.definition.name
	i.definition.entities.each do|j|
	  if j.is_a? Sketchup;;ComponentInstance 
		puts j.definition.name
		j.definition.entities.each do|k|
		  if k.is_a? Sketchup;;ComponentInstance 
			puts k.definition.name
		  end
		end
	  end
	end
  end
end

Now, to organize as a proceedure to accomplish the above (3 levels) to the nth level:-}