[Plugin] FaceSplit v1.0.3

TIG

No need to group ?
Collect all of the faces.
Then collect points for each of the faces - i.e. the 'center' point and the all of the perimeter points needed.
Iterate the points collection - get the 'center' point, then add the new edges from the other points...

### pseudo-code...
faces=[face1, face2, etc]
points=[[face1_points_array], [face2_points_array], etc]
### NOW add edges from each fixed set of points
points.each{|pts|
  cpt=pts.shift ### gets/removes 1st point
  pts.each{|pt| ents.add_line(cpt, pt) }
}

renderiza

Look what happens if you test the code above with object similar to the one in image below. If the face has a hole in the middle and is not triangulated or quadrangular like in the 2nd row the result can be messy.

The second row show much better result because the first object had quad face before applying script.

Hope this helps.

renderiza

Thank you TIG will try that ASAP!!!

...TIG's suggestion works! Here is a code sample that you can copy & paste for testing...

The only function the code does is to split faces from medians to centroid.

def csplit()
			
model = Sketchup.active_model
ents = model.active_entities
sel = model.selection
faces = sel.grep(Sketchup;;Face)
edges = []
avg = []
cl = []

model.start_operation('csplit')

	faces.each do |face|
		edges << face.edges
		###########
		# Medians #
		###########
		lines = face.edges
		lines.each {|e| 
		e1 = e.start.position
		e2 = e.end.position  
		x = (e2.x + e1.x) / 2
		y = (e2.y + e1.y) / 2
		z = (e2.z + e1.z) / 2
		cl << Geom;;Point3d.new( x, y, z )
		}
		############
		# Centroid #
		############
		sum = Geom;;Point3d.new(0,0,0)
		verts = face.vertices
		n = verts.size.to_f
		verts.each {|v| sum += ORIGIN.vector_to(v.position) }
		avg << Geom;;Point3d.new( sum.x/n, sum.y/n, sum.z/n ) #/
	end # each face

	############################
	# From Centroid to Medians #
	############################
	faces.each do |face|
		centroid = avg.shift			
		edges.shift.each {|e| 
			lc = cl.shift
			ents.add_line( centroid, lc ) 
		}
	end

model.commit_operation

rescue => e

puts "Error <#{e.class.name}; #{e.message} >"
puts e.backtrace if $VERBOSE

model.abort_operation

else # when no errors;

sel.clear

end # csplit()

#######
# Run #
#######
csplit()

Always welcome suggestion to make code better...cheers!

TIG

I was about to tell you of the issue with faces with holes or L shapes having a centroid 'off-face', but you have displayed it already...
Here is the 'fix'...
As you iterate each face check
face.classify point(cpt)
If it is not on the face, on a face-edge or on a face-vertex then do this:
tr=Geom::Transformation.new() es=ents.intersect_with(false, tr, ents, tr, true, ents.to_a)
You could reduce the intersected array to say face.edges provided you have a reference to the face ?
Then if some edges collected into 'es' remain 'unfaced' use this to erase them? :
es.grep(Sketchup::Edge).each{|e|e.erase! unless e.faces[0]}

pilou

Bravo!
Some testings in view and some track the bugs!

Ps you are very friendly to have put my name but take attention that I have not made any code just a little moment of inspiration (given by a French guy anar!

anar

@unknownuser said:

Bravo!
Some testings in view and some track the bugs!

Ps you are very friendly to have put my name but take attention that I have not made any code just a little moment of inspiration (given by a French guy anar!

Thanks Pilou for mentioning that I started that discussion with you here : http://www.polyloop.net/showthread.php/9854-Topmod-De-la-maille-topologique%21/page7#133

And thanks also because without you that plugin would have never been made !

Anar
http://www.reppersdelight.spacymen.com

glro

@renderiza said:

Look what happens if you test the code above with object similar to the one in image below. If the face has a hole in the middle and is not triangulated or quadrangular like in the 2nd row the result can be messy.

The second row show much better result because the first object had quad face before applying script.

Hope this helps.

i thought it was only for surfaces, but i see that it works on volumes also...

would it be possible to split the volume following the liness making like a 3d puzzle?

this would mean adding surfaces following the lines to make independant volumes

like "voxelize.rb", but not only cubes

pilou

Seems working fine

pilou

And all medians are present!
I don't want imagine the possibilities in 3D!

renderiza

TIG: Thank you TIG will test that out effective immediately!

Pilou & Anar: People that bring ideas to the table deserve recognition as well.

glro: That would be very cool indeed! I think there is a plugin that does something like this but don't remember it just now. If I find it will let you know.

Pilou: Very cool!

Pixero

Hi!

May I suggest an addition.
For people working in 3ds Max a imported SketchUp model is sometimes hard to work with because it doesn't consist of evenly sized quad faces. I have this idea to be able to split a face with inner loops like windows by projecting lines in the direction of the edges to the outer loop.
See this quick sketch.

glro

@renderiza said:

..
[b]glro: That would be very cool indeed! I think there is a plugin that does something like this but don't remember it just now. If I find it will let you know.

:

Maybe you think also to voxelize.rb
http://sketchucation.com/forums/viewtopic.php?t=36063

but voxelize makes cubes only; it would be funny to split the volume in exact sub-volumes, and try to build the whole volume back again, using sketchup

i have a 3d connexion mouse, and there is a game like this, to learn how to use it

and in addition, splitting a volume in sub-volumes is equivalent to building a 3d mesh, for structural analysis...

renderiza

@pixero said:

I have this idea to be able to split a face with inner loops like windows by projecting lines in the direction of the edges to the outer loop.

This is excellent idea! It will produce the cleanest geometry possible before dividing it even more.

@glro said:

Maybe you think also to voxelize.rb
http://sketchucation.com/forums/viewtopic.php?t=36063

but voxelize makes cubes only; it would be funny to split the volume in exact sub-volumes, and try to build the whole volume back again, using sketchup

i have a 3d connexion mouse, and there is a game like this, to learn how to use it

and in addition, splitting a volume in sub-volumes is equivalent to building a 3d mesh, for structural analysis...

The plugin I had in my mind was not voxelize...it was one that only worked if you had SketchUp Pro.

Anyways making a plugin like this would be cool indeed. Not sure if I possess the knowledge to do it myself at the moment but will see if I can experiment with the idea in the future.

renderiza

[pre:3p20mm78]Authors:: Anar | Dan Rathbun | Pilou | Renderiza | TIG
Plugin Name:: FaceSplit
Version:: 1.0.1
Date:: 10/28/2013
Cost:: Free[/pre:3p20mm78]
FaceSplit v1.0.1 is now available for download.

Note: Will eventually make video explaining how to use plugin.

pilou

Sure a video will give some ideas to users!

What are the natures of the up date ?

guanjin

我点击图标，没有任何反应！

cotty

@guanjin said:

我点击图标，没有任何反应！

You should click after you have selected one or more faces.

guanjin

@cotty said:

@guanjin said:

我点击图标，没有任何反应！

You should click after you have selected one or more faces.

I have tried。
Thank you

120711014

thanks for sharing~~~~~~~~

Ulimann

I have tried but no success,to get this plugin to work.I have reinstalled a few times!
Running SU 8 Pro on Windows 7.
Any suggestion to get it working?