Help with .followme

dacastror

Hi guys, I am making a plugin where I need to use .followme and I'm having bug splat with some curves, an attached two example curves that give me problems
curves
here a fragment of my code

model = Sketchup.active_model
sel = model.selection
ent = model.entities
selec = []
selec.clear
sel.each{|ob| selec.push(ob) if ob.is_a?(Sketchup;;Edge)}
if selec.size == 0
   UI.messagebox "Please select a Curve"
   return
end

radio_tubo = 10.0.cm
lados_tubo = 8
pts=[]
pts.clear
pts=selec[0].vertices.collect{|v| v.position} 


if Sketchup.version.to_f < 7.0
   model.start_operation("Draw tube")
else
   model.start_operation("Draw tube", true)
end
   grupo = ent.add_group
   entities = grupo.entities
   normal_cir = (pts[0].vector_to pts[1]).normalize
   circle = entities.add_circle pts[0], normal_cir, radio_tubo, lados_tubo
   cara = entities.add_face circle
   cara.reverse!.followme selec
   #selec.each{|edge| edge.erase!}
model.commit_operation

qq="OK"

I try to test the plugin TubeAlongPath.rb with radius = 10 cm and also the bug occurs
plugin
I've noticed that with smaller r no problem (for example r = 2 cm)

I do not know how to fix this, in advance thank you for your help

(google translator)

.

Dan Rathbun

entities.add_circle does NOT return a Sketchup::Curve object.
It returns an Array of Sketchup::Edge objects, that make up the curve.

So line 27 should be:
edges = entities.add_circle( pts[0], normal_cir, radio_tubo, lados_tubo )

... and line 28:
cara = entities.add_face( edges[0].curve )

dacastror

Thanks Dan, I modified my code.
My problem persists, someone can see the problem?

sdmitch

Your problem in not so much your code but the curve itself, 320x0.42cm segments. Reducing the number of segments or scaling the curve up 100x worked without Bug Splat. Also reducing the circle size to 1cm worked as well. The 10cm circle is just to big for the curve.

dacastror

Thanks for the reply sdmitch, give me a first clue
what worries me is that the user of the plugin do this and generate a bug splat on, I would like in this case simply do not tube, but do not understand how to calculate the minimum length allowed for this case

sdmitch

It is probably more a function of the angle between segments than the length of the segments. In this case, the maximum radius is something between 4 and 5cm.

dacastror

you sent me on the right track, thanks sdmitch