I’ve been using Rhino to design Stained Glass art, it’s very useful as the 2d drawings can represent the glass panels very well

Came across a complication now that I am making 3d pieces, I don’t know how to align the pieces in 3d plane.

I figured out a trick that has been “good enough” but it’s very time consuming and doesn’t work for more complex structures.

In the photos I raise the pentagons so they join at the corresponding angle, I end up drawing a reference line where I want them to join and then align them with 3d rotation as close to the line while using 2 Viewports.

They never fit perfect (by millimeters, which add up)

I kindly ask for help regarding 3d alignment of faces, I have heard of constraints (which I don’t know how to use) but maybe there is a more simple solution?

I’ve learned most of it here. There’s a lot more that’s what’s on the menus. The off-menu commands lists is extensive too, with over 1000 long I think.

my approach would be to use arcs to construct intersection points to get the angle.

to draw the first initial (green) arc you can
either draw circle around curve ( which would require the blue construciton lines)
or use a c-plane and project Osnap (faster)

I don’t have much knowledge in math but I’ll research a bit to understand more fully, it gives insight on how to use the tools available in many different ways.

I will test this if my other pc doesn’t work, will check it out ven if it does, great practice