Soften-Edges using by ruby

Andreas

@jim said:

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

How does it work? Do you have an idea?

thomthom

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

TIG

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

@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

@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

@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

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

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

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

baldaman

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

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

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

TIG

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

artmusicstudio

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

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

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

@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?

TIG

Assuming ss=Sketchup.active_model.selection...

defns=[]
ss.grep(Sketchup;;ComponentInstance).each{|e|defns << e.definition}
defns.uniq!
defns.each{|defn|
  defn.entities.grep(Sketchup;;Edge).each{|e|
    if e.faces.length==2
      e.soft=true
      e.smooth=true
    end
  }
}

or something similar...

glro

@tig said:

Assuming ss=Sketchup.active_model.selection...

defns=[]
> ss.grep(Sketchup;;ComponentInstance).each{|e|defns << e.definition}
> defns.uniq!
> defns.each{|defn|
>   defn.entities.grep(Sketchup;;Edge).each{|e|
>     if e.faces.length==2
>       e.soft=true
>       e.smooth=true
>     end
>   }
> }

or something similar...

yes...it works

this will save me time, since i noticed that some components edges come back visible in my models, for unknown reason...

now with just one clic, the problem is solved

thank you

TIG

The unexpected reversion of smoothed edges to solid is a known bug.
Never save when in a edit session. Even an auto-save can trigger this, so never stay inside an edit session for longer than you need to...