3D tube around a curve
Tube[{{x1, y1, z1}, {x2, y2, z2}, …}]
Tube[{pt1, pt2, …}, r]
Tube[{{pt11, pt12, …}, {pt21, …}, …}, …]
Tube[curve, …]
Graphics3D[Tube[{{0, 0, 0}, {1, 1, 1}}]]
→ -Graphics3D-Graphics3D[Tube[{{0, 0, 0}, {1, 1, 1}}, .1]]
→ -Graphics3D-Graphics3D[Tube[BSplineCurve[{{1, 1, -1}, {2, 2, 1}, {3, 3, -1}, {3, 4, 1}}]]]
→ -Graphics3D-