Make constraints to fit cylinder into centre of icosahedra joint This is a little cylinder I want to fit into the exact centre of joint of icosahedra. How to make proper constrains?




Distance from cylinder to each bend must be equal
Central axis of cylinder should be normal to circumscribed sphere.


untitled.blend  

geodesic dome online
You can get there in three steps:


Select inner faces of the joint
Co Mesh > Snap > Cursor to selected (3D cursor is the center for new objects)
Add a cylinder with six sides - it will be precisely in the middle