Counting ComponentInstances

Developers Ruby API
1

Is it a method that returns all of ComponentInstance included in parent ComponentInstance in all levels of nesting?

2

Consider
ComponentDefinition.count_instances
and
ComponentDefinition.count_used_instances [>=v2016]

3

I think, It gives me only number of instances, or not? I need handle to each.

4

ComponentDefinition.instances will give you handles to all the instances. Class: Sketchup::ComponentDefinition — SketchUp Ruby API Documentation

5

You asked how to count them !

But as was said:

ComponentDefinition.instances

returns an array of all of its instances, but you then need to work out the ‘parent’ of each of them in turn…

6

Actually, he did not. Reread the original question.

7

[quote=“DanRathbun, post:6, topic:28421”]
Actually, he did not. Reread the original question.
[/quote] Actually he did, reread the title:
“Counting ComponentInstances”
NOT “Collecting ComponentInstances”…
Although in the text itself I admit the OP does indeed ask for a method to ‘return’ all instances…
But given the title itself it could have meant to ‘return a count of…’ …

1 Like
8

I’ll give it to you, but IMO, the title is not the question, it’s the “hook”.

9

Gentlemen, thank you for your suggestions. Next time I’ll try to accurately describe my problems in content and topic.
But back to access to the instance. I checked ComponentDefinition.instances. It returns only instances from the first level. Do you have any ideas, suggestiosn where I should start writing method that supports these issues? How to write a loop (or something else) running through all (of all levels of nesting) instances?

thank you in advance

Marcin

10

Ok, I made it in this way:

def get_instance(instance)
inst_array = Array.new
instance.definition.entities.each {|inst| inst_array << [inst,1] if inst.typename == “ComponentInstance”}
until not inst_array.find {|inst| inst[1] == 1}
inst_array.each do |inst|
inst[0].definition.entities.each {|inst| inst_array << [inst,1] if inst.typename == “ComponentInstance”}
inst[1] = 0
end
end
tablica = Array.new
inst_array.each {|inst| tablica << inst[0]}
tablica
end

Do you think is there a easier way?

11

(1) An instance of a component cannot be inserted into it’s own definition’s entities collection. It would create a circular reference.

(2) You should check the number of used instances and bail out of the method if the count is 0.

This statement makes no sense.

ALL of a definition’s instances will be a member of it’s .instances collection.