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Commit 71aa2903 authored by cmaffeo2's avatar cmaffeo2
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Updated methods for iterating through connections between segments

parent a36bc78c
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segmentmodel.py
View file @ 71aa2903
......@@ -14,9 +14,13 @@ import types
"""
TODO:
- document
-
- handle crossovers
- connections in the middle of a segment?
- merge beads at ends of connected helices?
- map to atomic representation
- remove performance bottlenecks
- test for large systems
- assign sequence
"""
class Location():
......@@ -42,12 +46,25 @@ class ConnectableElement():
def __init__(self, connections=[]):
self.connections = connections
def get_connections_and_locations(self, type_=None):
""" Returns a list with each entry of the form:
connection, location_in_self, location_in_other """
ret = []
for c in self.connections:
if type_ is None or c.type_ == type_:
if c.A.container == self:
ret.append( [c, c.A, c.B] )
elif c.B.container == self:
ret.append( [c, c.B, c.A] )
else:
raise Exception("Object contains connection that fails to refer to object")
return ret
def _connect(self, other, connection):
self.connections.append(connection)
other.connections.append(connection)
def _find_connections(self, loc):
return [c for c in self.connections if c.A == loc or c.B == loc]
# def _find_connections(self, loc):
# return [c for c in self.connections if c.A == loc or c.B == loc]
class Segment(ConnectableElement, Group):
......@@ -65,6 +82,7 @@ class Segment(ConnectableElement, Group):
mass = 300,
radius = 1,
)
# orientation_bond = HarmonicBond(10,2)
orientation_bond = HarmonicBond(30,1.5, rRange = (0,500) )
......@@ -444,19 +462,27 @@ class SegmentModel(ArbdModel):
self.useNonbondedScheme( nbDnaScheme )
def get_connections(self,type_=None):
""" Find all connections in model, without double-counting """
added=set()
ret=[]
for s in self.segments:
items = [e for e in s.get_connections_and_locations(type_) if e[0] not in added]
added.update([e[0] for e in items])
ret.extend( items )
return ret
def _get_intrahelical_beads(self):
ret = []
for s in self.segments:
ret.extend( s.get_all_consecutive_beads(2) )
for s in self.segments:
for c in s.connections:
if c.type_ == "intrahelical":
if c.A.container == s: # avoid double-counting
b1,b2 = [loc.particle for loc in (c.A,c.B)]
for b in (b1,b2): assert( b is not None )
ret.append( [b1,b2] )
for c,A,B in self.get_connections("intrahelical"):
# TODO: check that b1,b2 not same
b1,b2 = [l.particle for l in (A,B)]
for b in (b1,b2): assert( b is not None )
ret.append( [b1,b2] )
return ret
def _get_intrahelical_angle_beads(self):
......@@ -464,47 +490,43 @@ class SegmentModel(ArbdModel):
for s in self.segments:
ret.extend( s.get_all_consecutive_beads(3) )
for s1 in self.segments:
for c in s1.connections:
if c.A.container != s1: continue
s2 = c.B.container
if c.type_ == "intrahelical":
b1,b2 = [loc.particle for loc in (c.A,c.B)]
for b in (b1,b2): assert( b is not None )
## TODO: make this code more robust
## TODO: find bug that makes things be out of order
try:
b0 = s1.get_beads_before_bead(b1,1)
assert(len(b0) == 1)
b0 = b0[0]
assert( b0 is not None )
ret.append( [b0,b1,b2] )
except:
...
try:
b0 = s1.get_beads_after_bead(b1,1)
assert(len(b0) == 1)
b0 = b0[0]
assert( b0 is not None )
ret.append( [b2,b1,b0] )
except:
...
try:
b3 = s2.get_beads_before_bead(b2,1)
assert(len(b3) == 1)
b3 = b3[0]
assert( b3 is not None )
ret.append( [b3,b2,b1] )
except:
...
try:
b3 = s2.get_beads_after_bead(b2,1)
assert(len(b3) == 1)
b3 = b3[0]
assert( b3 is not None )
ret.append( [b1,b2,b3] )
except:
...
for c,A,B in self.get_connections("intrahelical"):
s1,s2 = [loc.container for loc in (A,B)]
b1,b2 = [loc.particle for loc in (A,B)]
for b in (b1,b2): assert( b is not None )
## TODO: make this code more robust
try:
b0 = s1.get_beads_before_bead(b1,1)
assert(len(b0) == 1)
b0 = b0[0]
assert( b0 is not None )
ret.append( [b0,b1,b2] )
except:
...
try:
b0 = s1.get_beads_after_bead(b1,1)
assert(len(b0) == 1)
b0 = b0[0]
assert( b0 is not None )
ret.append( [b2,b1,b0] )
except:
...
try:
b3 = s2.get_beads_before_bead(b2,1)
assert(len(b3) == 1)
b3 = b3[0]
assert( b3 is not None )
ret.append( [b3,b2,b1] )
except:
...
try:
b3 = s2.get_beads_after_bead(b2,1)
assert(len(b3) == 1)
b3 = b3[0]
assert( b3 is not None )
ret.append( [b1,b2,b3] )
except:
...
return ret
# def _get_intrahelical_bead_pairs_within(self, cutoff):
......@@ -649,10 +671,8 @@ class SegmentModel(ArbdModel):
s._generate_beads( self, max_basepairs_per_bead, max_nucleotides_per_bead )
""" Combine beads at junctions as needed """
for s in segments:
for c in s.connections:
if c.A.container == s:
...
for c,A,B in self.get_connections():
...
""" Reassign bead types """
if self.DEBUG: print("Assigning bead types")
......@@ -813,13 +833,10 @@ class SegmentModel(ArbdModel):
parent.add_dihedral(o1,b1,b2,o2, pot)
""" Add connection potentials """
for s in segments:
for c in s.connections:
if c.type_ == "terminal_crossover":
if c.A.container == s:
b1,b2 = [loc.particle for loc in (c.A,c.B)]
pot = self.get_bond_potential(4,18.5)
self.add_bond(b1,b2, pot)
for c,A,B in self.get_connections("terminal_crossover"):
b1,b2 = [loc.particle for loc in (c.A,c.B)]
pot = self.get_bond_potential(4,18.5)
self.add_bond(b1,b2, pot)
self._updateParticleOrder()
......
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