MEDYAN.boundary_capsule
Tuple{}
Return a capsule boundary.
center
(nm): The center of the capsule.
axis
(nm): The direction and length of the capsule spine. The spine line segment goes from center - axis/2
to center + axis/2
If zero the capsule is a sphere.
radius
(nm): Radius of capsule, the full length of the capsule is norm(axis) + 2radius
.
stiffness
(pN/nm): How strong the boundary is.