Where:
- n_residues is an integer number
- n_sample_strands is an integer number
add a strands
Add a strand close to this point in the map, try to fit the orientation. Add to a molecule called "Strand", create it if needed. n_residues is the estimated number of residues in the strand.
n_sample_strands is the number of strands from the database tested to fit into this strand density. 8 is a suggested number. 20 for a more rigourous search, but it will be slower.
Returns: the index of the new molecule.