But it seems no way to calculate the area...

def sum_area( material, entities, tr = Geom;;Transformation.new )
  area = 0.0
  for entity in entities
    if entity.is_a?( Sketchup;;Group )
      area += sum_area( material, entity.entities, tr * entity.transformation )
    elsif entity.is_a?( Sketchup;;ComponentInstance )
      area += sum_area( material, entity.definition.entities, tr * entity.transformation )
    elsif entity.is_a?( Sketchup;;Face ) && entity.material == material
      # (!) The area returned is the unscaled area of the definition.
      #     Use the combined transformation to calculate the correct area.
      #     (Sorry, I don't remember from the top of my head how one does that.)
      #
      # (!) Also not that this only takes into account materials on the front
      #     of faces. You must decide if you want to take into account the back
      #     size as well.
      area += entity.area
    end
  end
  area
end

Thank you for your help!

I want to deduct the overlapping area between componentinstance and componentinstance in model.
How do I change this code?
Thank you for your help!

mod = Sketchup.active_model # Open model
ent = mod.entities # All entities in model
sel = mod.selection # Current selection

as = mod.definitions["column"].instances
bs = mod.definitions["beam"].instances

hits = {} ### empty hash
as.each{|a|
es = a.parent.entities
hits[a]=[]
bs.each{|b|
next unless es = b.parent.entities ### same context
bb = a.bounds.intersect(b.bounds)
hits[a] << b if bb && bb.valid?
}
}
hits.each{|hit| puts "column #{hit[0]} intersects beam #{hit[1]}" }

00.skp

TO TIG:
Thank you for your reply!
If I want to get the component's dynamic attributes(lenx, leny...) by multiple components collision detection?
and I will deduction of the overlapping area(multiple components) after...
(1)multiple components collision detection
(2)get the component's dynamic attributes(lenx, leny...)

Thank you for your help!

mod = Sketchup.active_model
ent = mod.entities

q = Sketchup.active_model.selection.add(
Sketchup.active_model.definitions["aaa"].instances )

a = Sketchup.active_model.selection.add(
Sketchup.active_model.definitions["bbb"].instances )

bb = Geom::BoundingBox.new.add(q.bounds.intersect(a.bounds))

if bb.valid?
puts "a"
else
puts "b"
end

It can't run...
How do I change the code?

Hello everyone

The following figure...
a and b intersect
b and c intersect
a and c not intersect

I get Leny, Lenz from dynamic attributes(inch)

How not to let the detected twice?(a&b and b&a)

Thank you for your help!

mod = Sketchup.active_model
ent = mod.entities
grp = ent.grep(Sketchup::ComponentInstance)
for i in 0...grp.length - 1
grp.each{ |g| next if g == grp[i] # skip comparing to self
bb = Geom::BoundingBox.new.add(g.bounds.intersect(grp[i].bounds))
if bb.valid?

#gg = g.get_attribute("dynamic_attributes","lenx","")
gg1 = g.get_attribute("dynamic_attributes","leny","")
gg2 = g.get_attribute("dynamic_attributes","lenz","")
#puts gg#.to_cm
puts gg1#.to_cm
puts gg2#.to_cm

#gg3 = grp[i].get_attribute("dynamic_attributes","lenx","")
gg4 = grp[i].get_attribute("dynamic_attributes","leny","")
gg5 = grp[i].get_attribute("dynamic_attributes","lenz","")
#puts gg3#.to_cm
puts gg4#.to_cm
puts gg5#.to_cm

q = gg1.to_i * gg2.to_i - gg4.to_i * gg5.to_i
puts q
#puts "#{g.name} and #{grp[i].name} intersect"
else
puts "#{g.name} and #{grp[i].name} do not intersect"
end
bb.clear
}
end

11.skp

Hello everyone

How to detect collisions between ComponentInstance?

e.g:
if name = "column" all component collision name = "beam" all component
do something...
else
do something...
end

Thank you for your answer!

Hello everyone

How to detect collisions between ComponentInstance?

e.g:
if name = "column" all component collision name = "beam" all component
do something...
else
do something...
end

Thank you for your answer!

Hello everyone:

I want to know how to automatically calculate the component's area and volume in the dynamic attributes.

p.s:Non-use formula input.

Such as following example.

Thank you for your answer.

Hello everyone

mod = Sketchup.active_model
ent = mod.entities
grp = ent.grep(Sketchup::ComponentInstance)
for i in 0...grp.length - 1
grp.each{ |g| next if g == grp[i]
bb = Geom::BoundingBox.new.add(g.bounds.intersect(grp[i].bounds))
if bb.valid?
puts "#{g.name.to_s} and #{grp[i].name.to_s} intersect"
else
puts "#{g.name.to_s} and #{grp[i].name.to_s} do not intersect"
end
bb.clear
}
end

I want to know how to calculate the model of dynamic properties of all objects (such as "Lenx", "Leny" ,"Lenz"...etc) after the object intersected the other object.

The case description like this:

First, detect all objects intersect situations like the above code
Second, if name = "column" objects intersect name = "beam" objects(just a simple example)
then, "column" objects dynamic properties("Lenx") deduction "beam" objects dynamic properties("Leny")

Thank you for your advice and help