TIG, 10x allot for your detailed post.
very useful.

regevz

@tig said:

The edge has two vertices - its 'ends'.
Found by edge.start and edge.end or edge.vertices[0] and edge.vertices[1].
Let's assume you want to move the edge's end by dist=100.mm
We know the 'line' of the edge from line=edge.line, where line[0]==edge.start.position and vector=line[1] is the line's vector towards its 'end'.
Now work out where the new end would be by using an offset on a copy of the end-point by dist...
new_end_point = edge.end.position.clone.offset(vector,dist)
So now we have the point where we want the end-vertex to move to.
You have to make a transformation to apply to that vertex
[ruby:anqq9m2l]tr=Geom::Transformation.new(new_end_point)[/ruby:anqq9m2l]
Now you apply it to the vertex - it's done in a convoluted way for a vertex compared to other '[ruby:anqq9m2l]entities[/ruby:anqq9m2l]'...
If you are working in a group use '[ruby:anqq9m2l]group.entities...[/ruby:anqq9m2l]', but here I assume it's in the model...
[ruby:anqq9m2l]Sketchup.active_mode.active_entities.transform_entities(tr, edge.end)[/ruby:anqq9m2l]
The end-vertex of the edge should now move 100.mm further away from the start-vertex...
If you want to move the start-vertex then use [ruby:anqq9m2l]vector.reverse[/ruby:anqq9m2l] and substitute the start/end vertices.
For other units change the method e.g. [ruby:anqq9m2l]0.1.m[/ruby:anqq9m2l] or with no suffix it's taken as [ruby:anqq9m2l]inches[/ruby:anqq9m2l]...........

DIEGO-RODRIGUEZ thanks allot.
this tool is exact what i looking for.

friends, i am amaze from your responses...
10x

hello,
how can i change the length of line/edge by ruby script ?

regevz

hello,

i have a device "disto d8" it's a measuremeter by laser.
http://www.leica-geosystems.com/en/Laser-Distancemeter-Leica-DISTO-D8_78069.htm

the device have the ability to send by BLUETOOTH the measure to the computer as keystrokes from the keyboard.

i want the draw a sketch and after that to change the length of the edges of it to the real measures by using the device one by one (without going into the edge properties and change the value)

please help me.

these are the steps that i think are needed

1. select the object
2. loop throw the edges one by one
3. input from the keyboard the measure and ENTER/TAB for end
4. change the edge to the length that input

regevz