Compute the N-CA-C tube. The tube selects the atoms marked CA but pass only through the ones placed between a N and a C atoms.
| molecule | MolecularDataType | Molecular data. |
| Points added | slider | Points added between two CA intersection nodes. |
| Smoothness | slider | "Tension" parameter of the interpolating spline: a value of 0 creates stright tube segment between nodes; 1 is the normal value and more accentuate curvature. |
| Tube scale | slider | Radius of the tube. |
| Tube facets | slider | Number of sides composing the tube wall. |
| fld | Mesh | The tube itself. |
| obj | DefaultObject | The renderable version of fld. |