def test_merge_system():
# take a protein
from chemlab.io import datafile
from chemlab.graphics import display_system
from chemlab.db import ChemlabDB
water = ChemlabDB().get("molecule", "example.water")
prot = datafile("tests/data/3ZJE.pdb").read("system")
# Take a box of water
NWAT = 50000
bsize = 20.0
pos = np.random.random((NWAT, 3)) * bsize
wat = water.copy()
s = System.empty(NWAT, NWAT * 3, box_vectors=np.eye(3) * bsize)
for i in range(NWAT):
wat.move_to(pos[i])
s.add(wat)
prot.r_array += 10
s = merge_systems(s, prot, 0.5)
display_system(s, 'ball-and-stick')
def test_merge_system():
# take a protein
from chemlab.io import datafile
from chemlab.graphics import display_system
from chemlab.db import ChemlabDB
water = ChemlabDB().get("molecule", "example.water")
prot = datafile("tests/data/3ZJE.pdb").read("system")
# Take a box of water
NWAT = 50000
bsize = 20.0
pos = np.random.random((NWAT, 3)) * bsize
wat = water.copy()
s = System.empty(NWAT, NWAT*3, box_vectors=np.eye(3)*bsize)
for i in range(NWAT):
wat.move_to(pos[i])
s.add(wat)
prot.r_array += 10
s = merge_systems(s, prot, 0.5)
display_system(s, 'ball-and-stick')
def test_bonds():
from chemlab.io import datafile
bz = datafile("tests/data/benzene.mol").read('molecule')
na = Molecule([Atom('Na', [0.0, 0.0, 0.0])])
# Adding bonds
s = System.empty(2, 2 * bz.n_atoms)
s.add(bz)
assert_npequal(s.bonds, bz.bonds)
assert_npequal(bz.bond_orders, [1, 2, 2, 1, 1, 2])
assert_npequal(s.bond_orders, bz.bond_orders)
s.add(bz)
assert_npequal(s.bonds, np.concatenate((bz.bonds, bz.bonds + 6)))
#assert_npequal(s.bond_orders)
# Reordering
orig = np.array([[0, 1], [6, 8]])
s.bonds = orig
s.reorder_molecules([1, 0])
assert_npequal(s.bonds, np.array([[6, 7], [0, 2]]))
# This doesn't change the bond_ordering
# Selection
ss = subsystem_from_molecules(s, [1])
assert_npequal(ss.bonds, np.array([[0, 1]]))
import inspect
ss2 = System.from_arrays(**dict(inspect.getmembers(ss)))
ss2.r_array += 10.0
ms = merge_systems(ss, ss2)
assert_npequal(ms.bonds, np.array([[0, 1], [6, 7]]))
assert_npequal(ms.bond_orders, np.array([1, 1]))
# From_arrays
s = System.from_arrays(mol_indices=[0], bonds=bz.bonds, **bz.__dict__)
assert_npequal(s.bonds, bz.bonds)
assert_npequal(s.bond_orders, bz.bond_orders)
# Get molecule entry
# Test the bonds when they're 0
s.bonds = np.array([])
assert_equals(s.get_derived_molecule_array('formula'), 'C6')
def test_bonds():
from chemlab.io import datafile
bz = datafile("tests/data/benzene.mol").read('molecule')
na = Molecule([Atom('Na', [0.0, 0.0, 0.0])])
# Adding bonds
s = System.empty(2, 2*bz.n_atoms)
s.add(bz)
assert_npequal(s.bonds, bz.bonds)
assert_npequal(bz.bond_orders, [1, 2, 2, 1, 1, 2])
assert_npequal(s.bond_orders, bz.bond_orders)
s.add(bz)
assert_npequal(s.bonds, np.concatenate((bz.bonds, bz.bonds + 6)))
#assert_npequal(s.bond_orders)
# Reordering
orig = np.array([[0, 1], [6, 8]])
s.bonds = orig
s.reorder_molecules([1, 0])
assert_npequal(s.bonds, np.array([[6, 7], [0, 2]]))
# This doesn't change the bond_ordering
# Selection
ss = subsystem_from_molecules(s, [1])
assert_npequal(ss.bonds, np.array([[0, 1]]))
import inspect
ss2 = System.from_arrays(**dict(inspect.getmembers(ss)))
ss2.r_array += 10.0
ms = merge_systems(ss, ss2)
assert_npequal(ms.bonds, np.array([[0, 1], [6, 7]]))
assert_npequal(ms.bond_orders, np.array([1, 1]))
# From_arrays
s = System.from_arrays(mol_indices=[0], bonds=bz.bonds, **bz.__dict__)
assert_npequal(s.bonds, bz.bonds)
assert_npequal(s.bond_orders, bz.bond_orders)
# Get molecule entry
# Test the bonds when they're 0
s.bonds = np.array([])
assert_equals(s.get_derived_molecule_array('formula'), 'C6')
