@dan rathbun said: @ziocleto said: The strong typization of Point3d and Vector3d is also very questionable as ... And this why the SketchUp API authors made both classes "compatible" with a basic 3 element array, ... OH.. also.. there is another way they could have gone for this particular method. And that is duck-typing the argument, instead of class-typing it. Ruby example (they are really implemented on the C-side): <span class="syntaxdefault">def </span><span class="syntaxkeyword">+(</span><span class="syntaxdefault">arg</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">  raise</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">TypeError</span><span class="syntaxkeyword">,</span><span class="syntaxstring">"invalid&nbsp;argument&nbsp;type"</span><span class="syntaxkeyword">,</span><span class="syntaxdefault">caller</span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> unless<br />  </span><span class="syntaxkeyword">(</span><span class="syntaxdefault"> arg</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">respond_to</span><span class="syntaxkeyword">?(;</span><span class="syntaxdefault">x</span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">&&<br /></span><span class="syntaxdefault">    arg</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">respond_to</span><span class="syntaxkeyword">?(;</span><span class="syntaxdefault">y</span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">&&<br /></span><span class="syntaxdefault">    arg</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">respond_to</span><span class="syntaxkeyword">?(;</span><span class="syntaxdefault">z</span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">||<br /></span><span class="syntaxdefault">  </span><span class="syntaxkeyword">(</span><span class="syntaxdefault"> arg</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">respond_to</span><span class="syntaxkeyword">?(;[])</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">&&</span><span class="syntaxdefault"> </span><span class="syntaxcomment"># be sure it has 3 members<br /></span><span class="syntaxdefault">    arg</span><span class="syntaxkeyword">[</span><span class="syntaxdefault">0</span><span class="syntaxkeyword">].</span><span class="syntaxdefault">is_a</span><span class="syntaxkeyword">?(</span><span class="syntaxdefault">Numeric</span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> rescue false </span><span class="syntaxkeyword">&&<br /></span><span class="syntaxdefault">    arg</span><span class="syntaxkeyword">[</span><span class="syntaxdefault">1</span><span class="syntaxkeyword">].</span><span class="syntaxdefault">is_a</span><span class="syntaxkeyword">?(</span><span class="syntaxdefault">Numeric</span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> rescue false </span><span class="syntaxkeyword">&&<br /></span><span class="syntaxdefault">    arg</span><span class="syntaxkeyword">[</span><span class="syntaxdefault">2</span><span class="syntaxkeyword">].</span><span class="syntaxdefault">is_a</span><span class="syntaxkeyword">?(</span><span class="syntaxdefault">Numeric</span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> rescue false </span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">    </span><span class="syntaxcomment"># rescue modifiers trap IndexError exceptions<br /><br /></span><span class="syntaxdefault">  </span><span class="syntaxcomment"># the method body<br /><br /></span><span class="syntaxdefault">end</span> If you are only concerned with Ruby 2.0+, then you can use a refinement module to correct the method for you code only.

Put the face in a group the do the followme. Everything created by the followme will be added to that group myGroup = Sketchup.active_model.entities.add_group myFace status = myFace.followme(lines) Then you can move the group.

Thanks I've missed that edge.find_faces, it works great. I think the naming put me off as I wasn't expecting that it will also add faces, I just thought it was going to find potential faces, I think it should may be renamed: find_and_add_faces just for clarity.