Followme - hang

[winagain]

Hi , Everyone ,

everytime i run the following script , my computer was hang (same in a few computers) , if i remove pts[5] to pts[9] , it can run properly , i found the problems is "followme" causing the issue.

I'm thinking this is the problem of Sketchup , is there anyone have the same problem ?

=================
def draw_all_object_0001
model = Sketchup.active_model
entities = model.active_entities
pts = []
pts[0] = [3932.75984252 , 5122.173228346 , 0]
pts[1] = [3833.940944882 , 4902.881889764 , 0]
pts[2] = [3857.169291339 , 4822.566929134 , 0]
pts[3] = [3234.334645669 , 3693.433070866 , 0]
pts[4] = [3310.318897638 , 3651.307086614 , 0]
pts[5] = [3227.641732283 , 3501.307086614 , 0]
pts[6] = [2355.594488189 , 3982.409448819 , 0]
pts[7] = [3048.114173228 , 5221.385826772 , 0]
pts[8] = [3405.988188976 , 5023.748031496 , 0]
pts[9] = [3566.618110236 , 5314.692913386 , 0]

	p2vector = [0,1,0]
	
	ptvertex = pts[0]
	vectorX = Geom::Vector3d.new p2vector
	vectorX2 = vectorX.normalize!				
	edgesX = entities.add_circle ptvertex, vectorX2, 19.68503937 
	faceX = entities.add_face edgesX
								
					
	curve = entities.add_curve pts
	begin
	   status = faceX.followme curve  #sketchup hang here 
	 rescue
	   UI.messagebox $!.message
	 end								
end	

UI.menu("PlugIns").add_item("Draw -- myshape") {
	draw_all_object_0001
	 view = Sketchup.active_model.active_view
	 new_view = view.zoom_extents    	    	
}      	

========================

[Dan Rathbun]

Why are you passing co-ordinates with 9 decimal places?

Note: Sketchup has an internal limit of 0.001 inch (0.0254mm)

[TIG]

Even with the coordinate value at more sensible dps it still hangs at the followme.
A very puzzling phenomenon...
If you make the face and the path, then stop before the followme code runs [just add a # in front of the code]; when you can use a manual followme on the parts and it's fine, but if you get references to the face and to the curves edges [using selection etc] and do a coded followme inside the Ruby Console it hangs again !
Reducing the points' values by 1/10 or *10 has no affect - it still hangs...
It is possible to have followme paths consisting of dozens of connected edges, so I fail to see what is causing the issues here with just these 9 coplanar and non-intersecting edges...
There are no tight bends or short lengths to cause 'small facet issues' etc, but they shouldn't cause the hang anyway - they just leave missing small facets on completion.
The fact that is will successfully do a manual followme with pre-pick path and clicked face is plain weird...
It's is a complete mystery to me why it fails as it does...
Any others got ideas ??

Incidentally to place the circle perpendicular to the first edge use
vectorX2=pts[1].vector_to(pts[0]) instead of the current way which skews it slightly...
Also you could reduce the number of facets in the circle by adding the additional optional final argument - e.g. ,8 ...
I'd also recommend encapsulating your methods inside your own module, and adding the new geometry into a new group.entities, to avoid potential clashes with other preexisting geometry - you can always use group.explode at the end if desired. [Once we have this working]

[Dan Rathbun]

Playing around with this issue a bit.

The followme API entry says the argument is AN edge object (singular.)
So, when I changed the argument to followme, to a single edge, ie, the first segment in the curve, it extruded the circle up to the first bend. No problem.

So then I tried wrapping that in a curve.edges.each block, but I got a popup error saying "Reference to 'Deleted Entity'."

I tried passing the whole curve to followme, also the curve.edges array, and even *(curve.edges), but still no joy.

[Dan Rathbun]

Ok I solved this.

You were overloading the followme method. Your co-ordinates to too high in precision, and I assume you wanted to specify mm.

I added an inputbox to the code, to set the size and segments for the face.
Added TIG's suggestion of creating the tube within a group (which is returned by the method, upon success.)
Module wrapped.
Undo Operation wrapped.
All numbers are specified in mm, and truncated at 0.001"

draw_all_object.rb

[winagain]

Hi , Dan

thank you very much , your script is work , but unfortunately , all the value i'm using is "inch" instead of "mm"

once i change your script to "inch" , it still hangs , but it's fine if i run "followme" manually.

[TIG]

A Dan says... if you specify the values to such a degree of accuracy, that's way beyond what Sketchup needs, then it somehow overloads it and it fails.
If you make your numbers with fewer decimal places - as Dan indicated - then it will work.
So instead of 1.23456789 use 1.235
Any more numbers than 3 after the inch d.p. is superfluous and causes the issues.
Dan assumed mm but if it's inches it's the same principle...

[winagain]

Hi , TIG & Dan

thank you for you reply , to confirm this is not the problem of decimal place , i've removed all the decimal place from the array, but it still hang. I found the major problem is the diameter of cicle , if i change it to 50mm it will hang. (but if you run "followme" manually , it won't hang even you set the diameter to 100mm)

#======================================================
def draw_all_object_0001
model = Sketchup.active_model
entities = model.active_entities
pts = []
pts[0] = [393 , 512 , 0]
pts[1] = [383 , 490 , 0]
pts[2] = [385 , 482 , 0]
pts[3] = [323 , 369 , 0]
pts[4] = [331 , 365 , 0]
pts[5] = [322 , 350 , 0]
pts[6] = [235 , 398 , 0]
pts[7] = [304 , 522 , 0]
pts[8] = [340 , 502 , 0]
pts[9] = [356 , 531 , 0]

p2vector = [0,1,0]

ptvertex = pts[0]
vectorX = Geom::Vector3d.new p2vector
vectorX2 = vectorX.normalize!
edgesX = entities.add_circle ptvertex, vectorX2, 20.mm , 8 # change to 50.mm will hang
faceX = entities.add_face edgesX

curve = entities.add_curve pts
begin
status = faceX.followme curve #sketchup hang here
rescue
UI.messagebox $!.message
end
end

UI.menu("PlugIns").add_item("Draw -- myshape") {
draw_all_object_0001
view = Sketchup.active_model.active_view
new_view = view.zoom_extents
}

#=========================================================

[Dan Rathbun]

Convert your pt arrays to REAL Geom::Point3d instances like I showed in the example, BEFORE passing them to the followme() method.

If you do not want mm, then just remove .mm calls from the code, and change the labels for the inputbox.

[winagain]

Hi , Dan

unfortunately , i've removed all the ".mm" in your code , if the diamter of the circle is 50 mm ,
this will hang , but it's fine if the diameter is 20mm , this is the reason why i said it seem to be related to the diameter of the circle instead of decimal place or array type.