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

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

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)

.

I would like to do this, to make a inputbox made with OpenGL, could you please show an example of how to do this?

with this would it be possible to create a dialog that allows the user to enter a number?

(google translator)

is true, on several occasions have been very frustrating these examples

this is very interesting! move from a sketchup model to a model in my hands is something I have long dreamed.
This is a wonderful job!
(google translator)

Thom thank you very much, really I could not understand how to do this

@dan rathbun said:

A ray is a two element array containing a point and a vector [ Geom::Point3d, Geom::Vector3d ]. The point defines the start point of the ray and the vector defines the direction.

Thanks Dan, I now understand better

@dan rathbun said:

Perhaps you wish to use model#raytest ?
It can return objects it hits.
View#pickray() does not, by itself, "hit" anything, but could be used for the 1st argument to Model#raytest().

I've never used it, looks interesting I'll give a look.
For now solve the problem using the parametric form of the line;

x = x0 + ta
y = y0 + tb
z = z0 + t*c

in my case a, b, c is associated with Geom :: Vector3D (parallel to the line)
and x0, y0, z0 is associated with Geom :: Point3D (content in the line)
the intersection with plane z=0 (XY plane), for example would be

ray = view.pickray x, y  #ray[0] -> Point3D, ray[1] -> Vector3d
if ray[1].z.abs>0
   z1 = 0 #Interesting plane
   t1 = (z1-ray[0].z)/ray[1].z
   x1 = ray[0].x + t1*ray[1].x
   y1 = ray[0].y + t1*ray[1].y 
end
#x1,y1,z1 are coordinates of the point of intersection with the plane

For the other two planes is very similar, although in my case I want to compare the different distances of the planes to the point of "eye" for this I did the following

ray = view.pickray x, y

if ray[1].z.abs>0
   z1 = 0 #Interesting plane
   t1 = (z1-ray[0].z)/ray[1].z
   d1 = (t1*ray[1].x)**2 + (t1*ray[1].y)**2 + (z1-ray[0].z)**2
end
#d1 is the square of the distance from the eye to the plane

Guys, how to remove an observer of tools? I created an observer slightly modifying the example shown in the API

class MyToolsObserver < Sketchup;;ToolsObserver
   def onActiveToolChanged(tools, tool_name, tool_id)
      if tool_id == 21100
         puts "tool x"
      end
   end
end

Sketchup.active_model.tools.add_observer(MyToolsObserver.new)

I thought you could with something like this:

Sketchup.active_model.tools.remove_observer(MyToolsObserver)

What is the correct way to remove this observer?

I give up, I can not understand how to use view.pickray x, y for the intersection with the XY, XZ and YZ, and thereby be able to guide a tool, really I can not see how this is done

I could only understand that returns two points, one coincides with the point of view and the other (I think) is a vector pointing toward the cursor, but do not understand how to use this to get the intersection with the respective flat front or behind me

@thomthom said:

Threads doesn't work well in SketchUp Ruby. It's Ruby 1.8 and they are not true threads.

I did not know this , thanks

@thomthom said:

Got a bare bone example that shows this slowness?

Yes,

require 'Win32API'
 
Thread.new {
   x=1 
   while (x<1000) do
     getCursorPos = Win32API.new("user32", "GetCursorPos", ['P'], 'V')
     lpPoint = " " * 8 # store two LONGs
     getCursorPos.Call(lpPoint)
     x, y = lpPoint.unpack("LL") # get the actual values
     coor_mouse = "  #{x},  #{y}"
     Sketchup;;set_status_text coor_mouse, SB_VCB_VALUE
   end
}

Note : to see how slow returns coordinates, should be small the Sketchup window and put the cursor outside it, to stop the program move the cursor to the right until x >1000

(Google Translator)

@jim said:

getExtents, maybe.

thank you very much Jim!, this solved the problem, cost me a bit to understand how to implement it, but it goes

@thomthom said:

What if you also hook into the event callback of when the cursor moves? Ignoring the Tool class' events?

I tried but it works very slow when the cursor is outside the window of Sketchup,

@thomthom said:

#1. You make special cases for that. When you don´t hit any geometry, Make a pickray and see if it intersects any of the XY, XZ, YZ planes.

Thomthom thank you very much!, That's what I'll do

@thomthom said:

#2. Don´t think you can with just pure Ruby. The native tools do that because they are done in C++ and capture the mouse. Unfortunatly there is no way to capture the mouse from the Ruby API.

It is a pity. I thought this might serve me

require 'Win32API'
 
getCursorPos = Win32API.new("user32", "GetCursorPos", ['P'], 'V')
lpPoint = " " * 8 # store two LONGs
getCursorPos.Call(lpPoint)
x, y = lpPoint.unpack("LL") # get the actual values
coor_mouse = " y = #{x},  x = #{y}"

but at the end I think can not because onMouseMove only respond within the drawing window.

any suggestions to prevent my tool display incomplete?

.

Hi, I'm trying to create a tool and I have arisen various questions in the process.
One question is how orienting a tool as shown in the image? since there are no faces on which to place the tool and degrees_of_freedom is in this case = 3

Another question I have is, How to detect the position of the tool outside the edit window?, (as happens with the orbit tool).

and the other question is, what command I can use for prevent my tool this cropped and disappears only when I leave the drawing window?

sorry for these "gif" can be a bit annoying but needed to illustrate my questions
(google translator)

To do this simply could not use the version of the Pythagorean Theorem in 3d?
h² = a² + b² + c²
that gives the diagonal of a cube or any parallelepiped of right angles
(google translator)

I solved the problem, the key was to use "mod.edit_transform.origin"
I leave the code in case anyone needs it one day

mod = Sketchup.active_model sel = mod.selection parert_origin = mod.edit_transform.origin entity_origin = sel[0].transformation.origin distance = entity_origin-parert_origin tr = mod.edit_transform.inverse distance.transform tr

Sdmitch thank you very much, unfortunately the problem persists when I'm in the active context, I'm trying something with this

mod = Sketchup.active_model 
path = mod.active_path
tr1 = Geom;;Transformation.new([0,0,0],[1,0,0],[0,1,0])
if path
  path.each{|entity|
     tr2 = entity.local_transformation
     tr1 = tr1*tr2
  }
end
tr1.origin

It works, but to play around with this in the least expected moment this fails. If it always worked, I would do something like this then

mod = Sketchup.active_model 
sel = mod.selection
path = mod.active_path
tr1 = Geom;;Transformation.new([0,0,0],[1,0,0],[0,1,0])
if path
  path.each{|entity|
     tr2 = entity.local_transformation
     tr1 = tr1*tr2
  }
end
origin_parent = Geom;;Vector3d.new(tr1.origin.to_a)

ejex_o = sel[0].transformation.xaxis
ejey_o = sel[0].transformation.yaxis
center = sel[0].local_bounds.center
tr3 = Geom;;Transformation.new([0,0,0], ejex_o, ejey_o)
center_tr = Geom;;Vector3d.new((center.transform tr3).to_a)
origin_group = Geom;;Vector3d.new(sel[0].transformation.origin.to_a)
point = origin_group - origin_parent + center_tr 
point_tr = point.transform tr1.inverse

here I have gained the center of the group with respect to the coordinate system of the parent in the active context. The problem is that it only works well sometimes,
I do not understand how to fix this
(google translator)

thanks for replying, I saw this link, unfortunately I still do not understand how to solve my problem