Soften-Edges using by ruby

Andreas · 14 Sept 2010, 11:26

I want to use the menu command "Soften Edges" from the "Window"-menu by ruby.
Can someone tell me how does it work?

thomthom · 14 Sept 2010, 12:44

No sure if you can - you might have to do it manually.

Jim · 14 Sept 2010, 13:06

I don't think it is available through an API method; you will need to write your own soften method.

Andreas · 14 Sept 2010, 13:42

@jim said:

... you will need to write your own soften method.

How does it work? Do you have an idea?

thomthom · 14 Sept 2010, 13:57

Compare the angle_between of the face's normal, soft and smooth if they are within the threshold.

TIG · 14 Sept 2010, 14:03

Make an array of the selected edges [or of the edges within selected groups etc].
Iterate through those edges and test it they have >1 face.
Soft/Smooth them...


def makesoftsmooth()
 model=Sketchup.active_model
 ss=model.selection
 ### You can assemble any collection of edges
 ### Here it's from the model's current selection
 edges=[]
 ss.to_a.each{|e|
   edges << e if e.class==Sketchup;;Edge
   e.entities.each{|ee|edges << ee if e.class==Sketchup;;Edge}if e.class==Sketchup;;Group
 }
 edges.each{|edge|
   if edge.faces[1]
     edge.soft=true
     edge.smooth=true
   end
 }
end#def

Save code as makesoftsmooth.rb or use the def as part of a broader tool.
Execute it as makesoftsmooth()
This softens ALL edges that have at least 2 faces - but if you want to soften edges based on angle between its two faces use something like ang=edge.faces[0].normal.angle_between(edge.faces[1].normal) and then use edge.soft=true if ang.radians >= 45.0 etc or whatever the angle you desire [here it's 45 degrees]

Andreas · 15 Sept 2010, 06:57

@tig said:

Make an array of the selected edges [or of the edges within selected groups etc].
Iterate through those edges and test it they have >1 face.
Soft/Smooth them...


> def makesoftsmooth()
>  model=Sketchup.active_model
>  ss=model.selection
>  ### You can assemble any collection of edges
>  ### Here it's from the model's current selection
>  edges=[]
>  ss.to_a.each{|e|
>    edges << e if e.class==Sketchup;;Edge
>    e.entities.each{|ee|edges << ee if e.class==Sketchup;;Edge}if e.class==Sketchup;;Group
>  }
>  edges.each{|edge|
>    if edge.faces[1]
>      edge.soft=true
>      edge.smooth=true
>    end
>  }
> end#def
>

Save code as makesoftsmooth.rb or use the def as part of a broader tool.
Execute it as makesoftsmooth()
...

Thank you!
That works well, if the edges not in a group.
But on edges in a group it doesn´t work.
What should I do so that it acts on the edges in a group?

thomthom · 15 Sept 2010, 07:39

@tig said:

Make an array of the selected edges [or of the edges within selected groups etc].
Iterate through those edges and test it they have >1 face.

The native soft+smooth tool doesn't soft+smooth any edges that is connected to more or less than 2 faces.

TIG · 15 Sept 2010, 08:13

@thomthom said:

@tig said:

Make an array of the selected edges [or of the edges within selected groups etc].
Iterate through those edges and test it they have >1 face.

The native soft+smooth tool doesn't soft+smooth any edges that is connected to more or less than 2 faces.

OK just adjust the code so that it's a edge.faces[1] and not edge.faces[2] test...***

To work on a group's edges


###... add this into the mix...
groups=[]
ss.to_a.each{|e|groups << e if e.class==Sketchup;;Group}
groups.each{|group|
  group.entities.to_a.each{|e|
    if e.class==Sketchup;;Edge and e.faces.length==2 ###***
      e.soft=true
      e.smooth=true
    end#if
  }
}
### ???

baldaman · 28 Sept 2011, 21:01

Dear TIG, I tried to edit you code in order to be able to choose the smooth angle but I didn't succeed.
WHat am I doing wrong?


def ss()
model=Sketchup.active_model
ss=model.selection
### You can assemble any collection of edges
### Here it's from the model's current selection
edges=[]
ss.to_a.each{|e|
   edges << e if e.class==Sketchup;;Edge
   e.entities.each{|ee|edges << ee if e.class==Sketchup;;Edge}if e.class==Sketchup;;Group
}
edges.each{|edge|
   if edge.faces[1]
ang=edge.faces[0].normal.angle_between(edge.faces[1].normal)
     edge.soft=true if ang.radians >= 45.0
     edge.smooth=true if ang.radians >= 45.0
   end
}
end#def

TIG · 28 Sept 2011, 21:51

I haven't tested it but it looks OK - except I'd have used
edge.soft=true if ang >= 45.degrees edge.smooth=true if ang >= 45.degrees
rather than
edge.soft=true if ang.radians >= 45.0 edge.smooth=true if ang.radians >= 45.0
There's a type in the group part use ee NOT e...
e.entities.each{|ee|edges << ee if **ee**.class==Sketchup::Edge}if e.class==Sketchup::Group
But but ought to work ?
If you get it to 'puts' edges and ang.radians etc as it iterates through what is shown in the Ruby Console ??

baldaman · 28 Sept 2011, 22:33

Here is the code and the result,
I tried with different angles.
If I choose 90° nothing is smoothed neither soften.

baldaman · 28 Sept 2011, 22:35

Oups, here is the code


def ss()
model=Sketchup.active_model
ss=model.selection
### You can assemble any collection of edges
### Here it's from the model's current selection
edges=[]
ss.to_a.each{|e|
   edges << e if e.class==Sketchup;;Edge
   e.entities.each{|ee|edges << ee if ee.class==Sketchup;;Edge}if e.class==Sketchup;;Group
}
edges.each{|edge|
ang=edge.faces[0].normal.angle_between(edge.faces[1].normal)
   if edge.faces[1]
     edge.soft=true if ang >= 45.degrees
     edge.smooth=true if ang >= 45.degrees
   end
}
end#def

TIG · 28 Sept 2011, 22:42

The angle between adjacent faces on the cylinder's curve is 360/numsegs = 15 degrees for 24 segements so that is less than 45 degrees so they won't be smoothed !
I suspect you want to smooth edges that are NOT >= 45.degrees - so reverse the logic of the test to
edge.soft=true if ang < 45.degrees edge.smooth=true if ang < 45.degrees
and then 'sharp' edges will be kept 'solid' but edges with faces with similar normals will get smoothed
So a right-angle arris stays sharp and a nearly flat surface gets smoothed...

baldaman · 28 Sept 2011, 23:04

... I am soooo stupid!
Thank you very much, it works perfectly.
Thank you very much master TIG

TIG · 29 Sept 2011, 08:07

That's OK
I should have spotted the error in your logic earlier too

artmusicstudio · 14 Oct 2013, 06:49

hello,
this piece of code is very helpful.
in my case this works:

SMOOTH LEFT

model=Sketchup.active_model
ss=group20.entities

You can assemble any collection of edges

Here it's from the model's current selection

edges=[]
ss.to_a.each{|e|
edges << e if e.class==Sketchup::Edge
e.entities.each{|ee|edges << ee if e.class==Sketchup::Edge}if e.class==Sketchup::Group
}
edges.each{|edge|
if edge.faces[1]
edge.soft=true
edge.smooth=true
end
}

BUT THIS ONE (smoothing with angle limit)
model=Sketchup.active_model
ss=group20.entities

You can assemble any collection of edges

Here it's from the model's current selection

edges=[]
ss.to_a.each{|e|
edges << e if e.class==Sketchup::Edge
e.entities.each{|ee|edges << ee if ee.class==Sketchup::Edge}if e.class==Sketchup::Group
}
edges.each{|edge|
ang=edge.faces[0].normal.angle_between(edge.faces[1].normal)
if edge.faces[1]
edge.soft=true if ang < 45.degrees
edge.smooth=true if ang < 45.degrees
end
}

is quit by following:

VAR. 0.1 k
load '01.rb'
Error: #<NoMethodError: undefined method normal' for nil:NilClass> C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/01.rb:1516:in draw_stairs'
C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/01.rb:1515:in each' C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/01.rb:1515:in draw_stairs'
C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/01.rb:973:in `each'

any idea about the "normal" problem?

thanx stan

TIG · 14 Oct 2013, 09:10

Recast:

edges.each{|edge|
ang=edge.faces[0].normal.angle_between(edge.faces[1].normal)
if edge.faces[1]
  edge.soft=true if ang < 45.degrees
  edge.smooth=true if ang < 45.degrees
end
}

as

edges.each{|edge|
if edge.faces[1]
  ang=edge.faces[0].normal.angle_between(edge.faces[1].normal)
  edge.soft=true if ang < 45.degrees
  edge.smooth=true if ang < 45.degrees
end
}

because in YOUR version you are trying to get the normal of ALL edge's faces even if an edge doesn't have any faces ! Or if the face only has one face YOUR version fails when it can't find the normal of the non-existent second face !

artmusicstudio · 14 Oct 2013, 19:04

YEAP!

smooth like a sup of tea with milk on a sunny afternon......

smoothing works perfect , thanx a lot ("again what learned", as we say here in bavaria)

lost a ot of time today with fighting again coordinate systems, whatever i do, the elements don't place themselves sometimes , where i expect them to, it seems, that within groups and components the time & space works different sometimes.....
stan

glro · 15 Oct 2013, 17:50

@tig said:

@thomthom said:

@tig said:

Make an array of the selected edges [or of the edges within selected groups etc].
Iterate through those edges and test it they have >1 face.

The native soft+smooth tool doesn't soft+smooth any edges that is connected to more or less than 2 faces.

OK just adjust the code so that it's a edge.faces[1] and not edge.faces[2] test...***

To work on a group's edges


> ###... add this into the mix...
> groups=[]
> ss.to_a.each{|e|groups << e if e.class==Sketchup;;Group}
> groups.each{|group|
>   group.entities.to_a.each{|e|
>     if e.class==Sketchup;;Edge and e.faces.length==2 ###***
>       e.soft=true
>       e.smooth=true
>     end#if
>   }
> }
> ### ???
>

it works for groups, but not for components...
is it possible?