Circle orientation other than Z_axis?

[tomot]

I'm in need for some code to orient a circle forming a stair railing, which needs to be normal to the riser/tread triangular relationship
see attachment.

    edges = entities.add_edges(@pt1, @pt2)
    circle = entities.add_circle(@pt1, Z_AXIS, 1.inch, 16)
    base = entities.add_face(circle)
    base.back_material = Sketchup;;Color.new (255,200,100) 
    base.followme(edges) 

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[TIG]

An edge has a 'line'.
That's a two element array of the start point and its vector.
So point=edge.line[0] and vector=edge.line[1]
Use 'vector' instead of an 'axis' and also the 'center' can be 'point'...

[tomot]

@tig said:

An edge has a 'line'.

point=edge.line[0] and vector=edge.line[1]

circle = entities.add_circle(@pt1, Z_AXIS, 1.inch, 16)

do I replace the Z_AXIS code with your code?

[TIG]

circle = entities.add_circle(@pt1, Z_AXIS, 1.inch, 16)

Your ' @pt1' can be replaced with any point you specify - like edge.line[0]
and the circle's 'normal' is any vector you specify - it doesn't have to be the z-axis [ Z_AXIS] so any vector, like edge.line[1], will do as well...
The radius [' i.inch'] in your code can also be whatever you want it to be...
And the ' 16' that sets the umber of segments, can also be what you like...

[tomot]

It took a while for your medication to be absorbed

        vector = $pt2a - $pt1a
        edges1 = entities.add_edges($pt1a, $pt2a)
        circle = entities.add_circle($pt1a, vector, 1.inch, 16)
        base = entities.add_face(circle)
        base.back_material = Sketchup;;Color.new (255,200,100) #use RGB Color numbers
        base.followme(edges1)

using my coded example: subtracting the 2 points creates a 3d vector which is normal to any circle.