Add_face(edearray) not working?

tafkab76

In the Ruby API it says that youn can create a face by passing an array of edges as an argument:

Entities.add_faceSketchUp 6.0+
The add_face method is used to create a face. You can call this method a number of ways:

entities.add_face(edge1, edge2, edge3, ...)
entities.add_face(edgearray)
entities.add_face(pt1, pt2, pt3, ...)
entities.add_face([pt1, pt2, pt3,...])
entities.add_face(curve)

I tried it like this

punkteArray = []
edgeArray =[]

punkteArray.push(Geom;;Point3d.new(0,0,0))
punkteArray.push(Geom;;Point3d.new(100,0,0))
punkteArray.push(Geom;;Point3d.new(100,0,100))
punkteArray.push(Geom;;Point3d.new(0,0,100))
punkteArray.push(Geom;;Point3d.new(0,0,0))

edgeArray = ents.add_edges punkteArray

face = ents.add_face(edgeArray)

but that returned nil and no edges were drawn at all. I know that I could have used

face = ent.add_face(punkteArray)

but I was hoping to be able to create a face with a hole in it by passing an array with the outer and inner loop edegs to the add_face method, but not even passing a single loops seems to work.

thomthom

add_face( edges ) does work. I've used it lots of times. Even your sample code works.

But...

@tafkab76 said:

but I was hoping to be able to create a face with a hole in it by passing an array with the outer and inner loop edegs to the add_face method, but not even passing a single loops seems to work.

You cannot create with a hole in one go. Create the face first - without outer loop. Then take your inner loops and create faces for each of them - you then erase the face created with the inner loops.

Btw - ents does that refer to model.active_entities ? Or did you use model.entities ?

thomthom

I didn't notice the add_face command at the end (it was below the code fold) But I'm seeing the same thing. I don't understand what's going on there...

tafkab76

But I can´t see the face on your screen, only four edges?

Here ist what it looks like when I execute the code on my machine. Maybe it´s a difference, because I use Ruby Code Editor?

[xxl-img:xg9qtt3f]http://www.steffenblome.de/add_face.jpg[/xxl-img:xg9qtt3f]

as you can see I used

ent = mod.entities

but I just tried

ent = mod.active_entities

with the same results.

And thanks for that advice on how to create a face with a hole, I´m going to use that.

thomthom

Ah!

When you created a set of edges with add_edges it didn't merge the start and end vertex.

That prevented it from creating the face because it wasn't a closed loop.

When I created a set of edges separately which where merged it did work.

So the failure of add_face is a result of add_edges not merging crossing vertices.

tafkab76

Ok, I see. That also explains why find_faces didn´t work on neither of the edges.
So add_face(edgearray) doesn´t work on API created egdes? Or is there a command that forces edges to merge to loops if possible?

thomthom

@tafkab76 said:

So add_face(edgearray) doesn´t work on API created egdes?

It works if the edges are a closed loop.
I think if you create each face individually with add_edge it will work. Alternatively you can try to intersect the created edges with themselves.

thomthom

But - in your case where you say:

@tafkab76 said:

but I was hoping to be able to create a face with a hole in it by passing an array with the outer and inner loop edegs to the add_face method, but not even passing a single loops seems to work.

You cannot create a face with holes in one operation.

@thomthom said:

You cannot create with a hole in one go. Create the face first - with the outer loop points. Then take your inner loop points and create faces for each of them - you then erase the face created with the inner loops.

tafkab76

Yes, I got that.

Thx!

krouza

@tafkab76 said:

Yes, I got that.

Thx!

You must use selection like this:

<span class="syntaxdefault">selection&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">model</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">selection<br />status&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">selection</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">add&nbsp;edges<br />&nbsp;&nbsp;<br /></span><span class="syntaxcomment">#&nbsp;Get&nbsp;an&nbsp;Array&nbsp;of&nbsp;all&nbsp;of&nbsp;the&nbsp;selected&nbsp;Edges<br /></span><span class="syntaxdefault">edges&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">selection</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">find_all&nbsp;</span><span class="syntaxkeyword">{&nbsp;|</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">|&nbsp;</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">kind_of</span><span class="syntaxkeyword">?(</span><span class="syntaxdefault">Sketchup</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">Edge</span><span class="syntaxkeyword">)}<br />&nbsp;&nbsp;&nbsp;<br /></span><span class="syntaxcomment">#&nbsp;Try&nbsp;to&nbsp;create&nbsp;a&nbsp;Face&nbsp;from&nbsp;the&nbsp;Edges&nbsp;in&nbsp;the&nbsp;active&nbsp;component<br /></span><span class="syntaxdefault">face&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">nil<br />begin<br />&nbsp;&nbsp;&nbsp;&nbsp;face&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">Sketchup</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">active_model</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">active_entities</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">add_face&nbsp;edges<br />rescue<br />end</span>

thomthom

You can get a type of entity faster by using grep. (See this thread: http://sketchucation.com/forums/viewtopic.php?f=180&t=48885 )

<span class="syntaxdefault"></span><span class="syntaxcomment">#&nbsp;Get&nbsp;an&nbsp;Array&nbsp;of&nbsp;all&nbsp;of&nbsp;the&nbsp;selected&nbsp;Edges<br /></span><span class="syntaxdefault">edges&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">selection</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">grep</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">Sketchup</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">Edge</span><span class="syntaxkeyword">)&nbsp;</span><span class="syntaxdefault"></span>