def makeBackbones(backboneDictList):
''' Takes the backbone dictionary and makes a list of backbone building blocks defined in their own block frames '''
backboneSet = []
for backbone in backboneDictList:
# create a backbone generator object for the polymer
backboneBBG = RPPBBG(backbone['filename'])
# create the starting point of the polymer
startPointBackBone = np.array([0.0, 0.0, backbone['Z1']])
# generate the frustrum containing the polymer
envelopeList = [
'frustum ' + str(backbone['Z1']) + ' ' + str(backbone['R1']) +
' ' + str(backbone['Z2']) + ' ' + str(backbone['R2'])
]
# assume failure
rejectPolymer = True
# loop until we get a viable polymer
while rejectPolymer:
# generate polymerBB of appropriate length.
backboneBB = backboneBBG.generateBuildingBlock(
backbone['numMonomers'],
startPointBackBone,
backbone['alpha1'],
backbone['alpha2'],
backbone['beta1'],
backbone['beta2'],
backbone['minDist'],
backbone['bondLength'],
envelopeList=envelopeList,
visualiseEnvelope=(0, 100, backbone['name'] + '_envelope.xyz'))
backboneBB.blockAtomNames = backbone['monomerNames']
# check that Z coord of point 0 is below z last point of polymer otherwise reject polymer and choose another one.
if backboneBB.blockXYZVals[0][2] < backboneBB.blockXYZVals[-1][2]:
rejectPolymer = False
else:
print("Polymer Rejected. Doing another.")
# add building block to list of block copolymer segments
if not backboneSet:
backboneSet = [cp.copy(backboneBB)]
else:
backboneSet.append(cp.copy(backboneBB))
return backboneSet
def makeSphereAndPolymers(numA, numB, numPolymersPerSphere, FMaxRadius,
FMinRadius, FZ1, FZ2, alpha1, alpha2, beta1, beta2,
AtomicMinDist, bondLength, filename):
SphereBBG = SPSBBG('SurfacePackSphere.txt')
Polymer1Generator = RPBBG('RandomPolymer.txt')
centerPos = np.array([0.0, 0.0, 0.0])
# generate the XYZVals in the packed spaced
Polymer1SphereBB = SphereBBG.generateBuildingBlock(numPolymersPerSphere,
FZ2, -90, 90, -180, 180,
FMinRadius)
Polymer1SphereBB.transformBBToLabFrame(np.array([0.0, 0.0, 1.0]),
centerPos, 0.0)
Polymer1SphereBB.exportBBK(filename + "_sphereBasePoints")
Polymer1SpherePoints = Polymer1SphereBB.blockXYZVals
envelopeList = [
'frustum ' + str(FZ1) + ' ' + str(FMaxRadius) + ' ' +
str(FZ2 - AtomicMinDist) + ' ' + str(FMinRadius)
]
polymerStartPoint = np.array([0.0, 0.0, FZ2])
polymer1Strands = [
Polymer1Generator.generateBuildingBlock(numMonomersPerPolymer,
polymerStartPoint,
alpha1,
alpha2,
beta1,
beta2,
AtomicMinDist,
bondLength,
envelopeList=envelopeList,
visualiseEnvelope=(0, 100))
for _ in range(numPolymersPerSphere)
]
[strand.setBlockRefPoint(polymerStartPoint) for strand in polymer1Strands]
names = ['O'] * numA
names = np.concatenate((names, ['C'] * numB), 0)
strandNum = 0
for strand in polymer1Strands:
strand.blockAtomNames = names[:]
strand.exportBBK(filename + "_strand" + str(strandNum))
strandNum += 1
directors = [(pos - centerPos) / np.linalg.norm(pos - centerPos)
for pos in Polymer1SpherePoints]
allNames = []
curStrand = 0
for director, pos, strand in zip(directors, Polymer1SpherePoints,
polymer1Strands):
strand.transformBBToLabFrame(director, pos, 0.0)
if curStrand == 0:
xyzVals = strand.blockXYZVals
allNames = strand.blockAtomNames
else:
xyzVals = np.concatenate((xyzVals, strand.blockXYZVals), 0)
allNames = np.concatenate((allNames, strand.blockAtomNames), 0)
curStrand += 1
fIO.saveXYZList(xyzVals, allNames, filename + "_sphere.xyz")
theta2, phi1, phi2, minDist)
fIO.saveXYZ(baseSPhereBB.blockXYZVals, 'C', "mollieShere.xyz")
numMonomers = 100
pointA = np.array([0.0, 0.0, 0.0])
alpha1 = 40
alpha2 = 50
beta1 = 110
beta2 = 130
minDist = 1.0
bondLength = 2.0
polymers = [
PolymerGenerator.generateBuildingBlock(numMonomers, pointA, alpha1,
alpha2, beta1, beta2, minDist,
bondLength)
for _ in range(0, numPoints)
]
outputXYZ = []
# hello
for unimer, basePoint in zip(polymers, baseSPhereBB.blockXYZVals):
director = basePoint / np.linalg.norm(basePoint)
newUnimerXYZ = coords.transformFromBlockFrameToLabFrame(
director, basePoint, 0.0, np.array([0.0, 0.0, 1.0]), pointA,
unimer.blockXYZVals)
outputXYZ += cp.copy(newUnimerXYZ)
for spiralPos in spirals5XYZBB.blockXYZVals:
filename = "uncut_spiral_5_" + str(spiral) + ".xyz"
curXYZVals, curNamesAll = Spiral(5, numParticlesArm, armEndRad, particleName, ConstrainedPolyGen, spiralAngularDisplacement, bondLength, alpha1, alpha2, beta1, beta2, atomicMinDist, filename)
theta, phi = coords.pickRandomPointOnUnitSphere()
director = coords.sphericalPolar2XYZ(np.array([1.0, theta, phi]))
curXYZValsNew = coords.transformFromBlockFrameToLabFrame(director, spiralPos, rnd.uniform(0, 2* np.pi), np.array([0.0, 0.0, 1.0]), np.array([0.0, 0.0, 0.0]), curXYZVals)
for xyzVal in curXYZValsNew:
xyzValsAll.append(cp.copy(xyzVal))
for name in curNamesAll:
namesAll.append(cp.copy(name))
startPointPolymer = np.array([0.0, 0.0, 0.0])
# generate the straight polymers
for polyPos in straightPolymers.blockXYZVals:
curPoly = PolyGen.generateBuildingBlock(numParticlesArm, startPointPolymer, alpha1*180/np.pi, alpha2*180/np.pi, beta1*180/np.pi, beta2*180/np.pi, atomicMinDist, bondLength)
theta, phi = coords.pickRandomPointOnUnitSphere()
director = coords.sphericalPolar2XYZ(np.array([1.0, theta, phi]))
curPoly.transformBBToLabFrame(director, polyPos, rnd.uniform(0, 2* np.pi))
for xyzVal in curPoly.blockXYZVals:
xyzValsAll.append(cp.copy(xyzVal))
for name in curPoly.blockAtomNames:
namesAll.append(cp.copy(name))
# generate the helical polymers
beta1Helical = 110
beta2Helical = 120
for helixPos in helicalPolymers.blockXYZVals:
curPoly = PolyGen.generateBuildingBlock(numParticlesArm, startPointPolymer, alpha1 * 180/np.pi, alpha2 * 180/np.pi, beta1Helical, beta2Helical, atomicMinDist, bondLength)
theta, phi = coords.pickRandomPointOnUnitSphere()
director = coords.sphericalPolar2XYZ(np.array([1.0, theta, phi]))
outerPolymerStrands = []
names = ['O'] * numA # red Hydrophobic
names = np.concatenate(
(names, ['C'] * numB),
0) # blue hydrophilic (later monomers blue are towards outer shell)
for strandNum in range(numPolymersPerOuterSphere):
print "starting strand: ", strandNum
envelopeSize = 0
if strandNum == 0:
envelopeSize = 1000000
strand = PolymerGenerator.generateBuildingBlock(
numMonomersPerPolymer,
outerPolymerStartPoint,
outerPolymerDihedralMin,
outerPolymerDihedralMax,
outerPolymerBondAngleMin,
outerPolymerBondAngleMin,
atomicMinDist,
bondLength,
envelopeList=outerEnvelopeList,
visualiseEnvelope=(envelopeSize, 400, 'outerEnvelope.xyz'))
strand.setBlockRefPoint(outerPolymerStartPoint)
strand.blockAtomNames = names[:]
strand.exportBBK("outer_strand_" + str(strandNum))
outerPolymerStrands.append(strand)
# generate the inner polymers
innerSphereFrustumInnerZInverted = innerSphereFrustumOuterZ - innerSphereFrustumInnerZ + innerSphereFrustumOuterZ
innerEnvelopeList = [
'frustum ' + str(innerSphereFrustumOuterZ - atomicMinDist) + ' ' +
str(innerSphereFrustumOuterRadius) + ' ' +
# find the radial director vector at each point
directors = [ coords.cyl2XYZ(np.array([pos[0], pos[1], 0.0])) for pos in Polymer1CylinderPointsCylCoords ]
directorsHat = [ director/np.linalg.norm(director) for director in directors]
# compute the base point of each vector on the inner cylinder
basePoints = [ coords.cyl2XYZ(np.array([FZ2, pos[1], pos[2]])) for pos in Polymer1CylinderPointsCylCoords ]
# set up the frustum to start on the inner surface
envelopeList = ['frustum ' + str(FZ1) + ' ' + str(FMaxRadius) + ' ' + str(FZ2 - AtomicMinDist) + ' ' + str(FMinRadius)]
polymerStartPoint = np.array([0.0, 0.0, FZ2])
polymer1Strands = [ Polymer1Generator.generateBuildingBlock(numMonomersPerPolymer,
polymerStartPoint,
alpha1,
alpha2,
beta1,
beta2,
AtomicMinDist,
bondlength,
envelopeList=envelopeList,
visualiseEnvelope=(0, 100)) for _ in range(numPolymersPerCylinder) ]
[ strand.setBlockRefPoint(polymerStartPoint) for strand in polymer1Strands ]
names = ['O'] * numA
names = np.concatenate( (names, ['C'] * numB), 0 )
strandNum = 0
for strand in polymer1Strands:
strand.blockAtomNames = names[:]
strand.exportBBK("strand" + str(strandNum))
strandNum += 1
def makeBlockCopolymer(numA, numB, Z1_A, R1_A, Z2_A, R2_A, alpha1A, alpha2A,
beta1A, beta2A, minDistA, bondLengthA, Z1_B, R1_B, Z2_B,
R2_B, alpha1B, alpha2B, beta1B, beta2B, minDistB,
bondLengthB, filename):
# create the generator
RandomPolymerPackBBG = RPBBG(filename)
# Z1 = envelopeParams[0]
# Radius1 = envelopeParams[1]
# Z2 = envelopeParams[2]
# Radius2 = envelopeParams[3]
pointA = np.array([0.0, 0.0, Z1_A])
envelopeList = [
'frustum ' + str(Z1_A) + ' ' + str(R1_A) + ' ' + str(Z2_A) + ' ' +
str(R2_A)
]
rejectPolymer = True
while rejectPolymer:
# generate polymer A of appropriate length.
RandomPolymer_A = RandomPolymerPackBBG.generateBuildingBlock(
numA + 1,
pointA,
alpha1A,
alpha2A,
beta1A,
beta2A,
minDistA,
bondLengthA,
envelopeList=envelopeList,
visualiseEnvelope=(0, 100, 'blockCopolymer_envelope.xyz'))
# check that Z coord of point 0 is below z coord of point numA - 1 otherwise reject polymer and choose another one.
if RandomPolymer_A.blockXYZVals[0][2] < RandomPolymer_A.blockXYZVals[
-1][2]:
rejectPolymer = False
else:
print("Polymer Rejected")
pointB = np.array([0.0, 0.0, Z1_B])
envelopeList = [
'frustum ' + str(Z1_B) + ' ' + str(R1_B) + ' ' + str(Z2_B) + ' ' +
str(R2_B)
]
# generate polymer B of appropriate length.
RandomPolymer_B = RandomPolymerPackBBG.generateBuildingBlock(
numB,
pointB,
alpha1B,
alpha2B,
beta1B,
beta2B,
minDistB,
bondLengthB,
envelopeList=envelopeList,
visualiseEnvelope=(0, 100, 'blockCopolymer_envelope.xyz'))
xyzVals = RandomPolymer_A.blockXYZVals[0:-1]
xyzVals = np.concatenate((xyzVals, [
a + RandomPolymer_A.blockXYZVals[-1] - RandomPolymer_B.blockXYZVals[0]
for a in RandomPolymer_B.blockXYZVals
]), 0)
names = ['O'] * numA
names = np.concatenate((names, ['P'] * numB), 0)
return (xyzVals, names)
str(FZ2A - AtomicMinDistA) + ' ' + str(FMinRadiusA)
]
envelopeListB = [
'frustum ' + str(FZ1B) + ' ' + str(FMaxRadiusB) + ' ' +
str(FZ2B - AtomicMinDistB) + ' ' + str(FMinRadiusB)
]
polymerStartPointA = np.array([0.0, 0.0, FZ2A + AtomicMinDistA])
polymerStartPointB = np.array([0.0, 0.0, FZ2B + AtomicMinDistB])
PegStrands = [
Polymer1Generator.generateBuildingBlock(numPEG,
polymerStartPointA,
PEGAlpha1,
PEGAlpha2,
PEGBeta1,
PEGBeta2,
AtomicMinDistA,
bondLengthA,
envelopeList=envelopeListA,
visualiseEnvelope=(0, 100))
for _ in range(numPolymersPerSphere)
]
[strand.setBlockRefPoint(polymerStartPointA) for strand in PegStrands]
if numHPMA > 0:
HPMAStrands = [
Polymer1Generator.generateBuildingBlock(numHPMA,
polymerStartPointA,
HPMAAlpha1,
HPMAAlpha2,
class BranchedPolymerPackBBG(BBG):
'''
Overloads the building block generator class, and makes use of the random polymer pack generator,
to generate a set of interweaving polymer chains. The directors of the first generation of chains can be
correlated within a specified deviation to a global director.
The first generation of polymer chains can then be used as a seed points for branching polymer chains
which have a specified density and minimum interior branch angle. Each of the subsequent unimers branches
may then be used as a seed points for additional unimers up to a specified number of generations of branching.
Every unimer that is generated will have a envelope which is a cone. The same shape cone will be used
for all unimers - they are related molecules afterall - but the orientation will be selected based on the degree
of correlation selected. Prior to computing each new unimer any of the over all set of points that are in the cone
will be isolated as points to Avoid for that unimer. In this way no unimer thread should intersect any other.
The self avoidance can be turned off. It turns out the polymers miss each other most the time anyway. Can live with
the odd clash, if we're only making cartoons.
A networkx graph of the polymer network is created whose nodes are the indices of the points in output xyzlist
and whose edges are the points in that list which are connected by a bond.
There are many additional parameters:
the alpha and beta ranges for the internal angles of the polymer.
the networkMinDist is the distance between the starting points of the polymer chains
MonomerMinDist is as close as two chains can come.
BondLength is the distance between successive unimers along the chain. Bondlength must be longer than minDist
or the chain self rejects. (sorry).
Minpoints per unimer is the smallest number of points allowed on a chain. typically the chain length is
determined by the distance to the outer box, and then 50 % of the time the polymers are
randomly truncated by a randomfactor between half and 1. MaxNumAttempts is a bailout counter for some
while loops which repeat various unimer constructions. Oftimes the starting point is just in a bad position.
Uggh. I'm bored. figure out the rest of the params yourself. They're pretty self explanatory.
'''
def __init__(self, filename):
BBG.__init__(self, filename)
def initialiseParameters(self):
# ensure parent initialisation takes place and core values are initialised
BBG.initialiseParameters(self)
self.particleName = self.getParam('particleName')
self.RPPBBG = RPPBBG(self.paramFilename)
self.VPCBBG = VPCBBG(self.paramFilename)
if self.noLoadErrors == False:
print(
"Critical Parameters are undefined for branched polymer network object"
)
sys.exit()
def generateBuildingBlock(self,
numGen1Unimers,
x1,
x2,
y1,
y2,
z1,
z2,
networkMinDist,
alpha1,
alpha2,
beta1,
beta2,
monomerMinDist,
bondLength,
minNumPointsUnimer,
maxNumAttempts,
selfAvoid,
coneAngle,
directorMaxPitch,
globalDirector,
numBranchGenerations,
branchDensity,
minBranchAngle,
angularRange=['None'],
pointsToAvoid=[],
visualiseEnvelope=(0, 20),
envelopeList=["None"],
SpaceCurveTransform=True):
numPoints = 0 # computed on the fly in this case
self.networkGraph = nx.Graph()
self.numGen1Unimers = numGen1Unimers
self.x1 = x1
self.x2 = x2
self.y1 = y1
self.y2 = y2
self.z1 = z1
self.z2 = z2
self.networkMinDist = networkMinDist
self.monomerMinDist = monomerMinDist
self.alpha1 = alpha1
self.alpha2 = alpha2
self.beta1 = beta1
self.beta2 = beta2
self.bondLength = bondLength
self.minNumPointsUnimer = minNumPointsUnimer
self.maxNumAttempts = maxNumAttempts
self.selfAvoid = selfAvoid
self.coneAngle = coneAngle * np.pi / 180.0
self.directorMaxPitch = directorMaxPitch * np.pi / 180.0
self.globalDirector = globalDirector
self.numBranchGenerations = numBranchGenerations
self.branchDensity = branchDensity
self.minBranchAngle = minBranchAngle * np.pi / 180.0
self.pointsToAvoid = pointsToAvoid
self.visualiseEnvelope = visualiseEnvelope
self.envelopeList = envelopeList + [
'cuboid ' + str(x1) + ' ' + str(x2) + ' ' + str(y1) + ' ' +
str(y2) + ' ' + str(z1) + ' ' + str(z2)
]
self.angularRange = angularRange
self.blockRefPoint = self.generateBuildingBlockRefPoint()
self.SpaceCurveTransform = SpaceCurveTransform
return BBG.generateBuildingBlock(self,
numPoints,
networkMinDist,
envelopeList=self.envelopeList,
visualiseEnvelope=visualiseEnvelope,
pointsToAvoid=pointsToAvoid)
def generateBuildingBlockDirector(self):
return np.array([0.0, 0.0, 1.0])
def generateBuildingBlockRefPoint(self):
return np.array([(self.x1 + self.x2) / 2.0, (self.y1 + self.y2) / 2.0,
(self.z1 + self.z2) / 2.0])
def generateBuildingBlockNames(self):
return [self.particleName] * self.numPoints
# over load the final function to get a building block, so that the networkGraph can be passed back as well.
def getBuildingBlock(self):
# access function that returns a building block based on the backbone
return (BuildingBlock(self.buildingBlockXYZ, self.blockNames,
self.blockConnectors, self.blockRefPoint,
self.blockDirectorHat), self.networkGraph)
def generateBuildingBlockXYZ(self):
# first pick n random points in the specified envelope within a cubic region of space.
# These are the unimer start points. Leave a margin at the edge to try to eliminate dodgy scenarios
startPoints = self.VPCBBG.generateBuildingBlock(
self.numGen1Unimers,
self.x1 + self.minNumPointsUnimer * self.bondLength,
self.x2 - self.minNumPointsUnimer * self.bondLength,
self.y1 + self.minNumPointsUnimer * self.bondLength,
self.y2 - self.minNumPointsUnimer * self.bondLength,
self.z1 + self.minNumPointsUnimer * self.bondLength,
self.z2 - self.minNumPointsUnimer * self.bondLength,
self.networkMinDist,
envelopeList=self.envelopeList,
pointsToAvoid=self.pointsToAvoid)
if self.dumpInterimFiles == 1:
fIO.saveXYZ(startPoints.blockXYZVals, 'C', 'pointsInCube.xyz')
# for each point generate a direction relative to the globalDirector in the allowed pitch range.
# azimuthally can choose anything, but elevation wise we are restrained to be within directorMaxPitch
# angle of the globalDirector. Choose a direction that yields at least minNumPointsUnimer
gen1UnimerDirectors = [
self.genDirector(point, self.minNumPointsUnimer,
self.globalDirector, self.directorMaxPitch,
self.maxNumAttempts)
for point in startPoints.blockXYZVals
]
# set up output arrays
xyzPoints = []
UnimerIndices = []
unimersToBranchFrom = []
currentUnimer = 0
# Now generate the gen1 Unimers
for point, director in zip(startPoints.blockXYZVals,
gen1UnimerDirectors):
print("Generating Unimer: ", currentUnimer + 1, " of ",
self.numGen1Unimers)
# generate the next list of xyz values
if self.selfAvoid:
# director[0] is the vector, director[1] is the number of points
unimerXYZVals = self.generateUnimer(
point, director[0], director[1],
xyzPoints + self.pointsToAvoid, self.maxNumAttempts)
else:
unimerXYZVals = self.generateUnimer(point, director[0],
director[1],
self.pointsToAvoid,
self.maxNumAttempts)
# make a tuple to note the start and end index of the new unimer in the points array.
# add that tuple to a list of indices
UnimerIndices += [(len(xyzPoints),
len(xyzPoints) + len(unimerXYZVals))]
# add the xyz points of the unimer to the growing list of xyzValues
xyzPoints += cp.copy(unimerXYZVals)
# make a note of the index of the latest tuple pair added.
# Each generation only adds to the last worms created
unimersToBranchFrom += [len(UnimerIndices) - 1]
currentUnimer += 1
print("First Generation Unimers Complete.")
if self.dumpInterimFiles == 1:
fIO.saveXYZ(xyzPoints, 'Ca', 'FirstGenUnimers.xyz')
# loop through the number of generations we want to have
for genNum in range(0, self.numBranchGenerations):
print("Now creating unimers for generation ", genNum + 1, " of ",
self.numBranchGenerations)
# create a new generation of unimers that will branch off the specified unimers.
# return a full list of all the points, the indices of each unimer in points
# and a list of new unimers from which we can branch from on the next generation
xyzPoints, UnimerIndices, unimersToBranchFrom = self.generateNextUnimerGeneration(
xyzPoints, UnimerIndices, unimersToBranchFrom)
# we have a list of tuples which contain the start and end indices of each unimer.
# Add this information to the graph network to complete the graphs.
# The nodes that connect the daughter and parent unimers together are already in there.
self.addNodesAndEdgesToGraphFromUnimerIndices(UnimerIndices)
return xyzPoints
# Each entry in unimer indices indicates a connected set of nodes.
# Add those nodes to the graph and then edges between them.
def addNodesAndEdgesToGraphFromUnimerIndices(self, UnimerIndices):
for segment in UnimerIndices:
# add the first node of the segment if it is not there already
if not self.networkGraph.has_node(segment[0]):
self.networkGraph.add_node(segment[0])
# for each subsequent node, add it and connect it to the previous node in the segment
for node in range(segment[0] + 1, segment[1]):
if not self.networkGraph.has_node(node):
self.networkGraph.add_node(node)
# add the edge connecting the previous node to the current node
self.networkGraph.add_edge(node - 1, node)
# generates a director for a given point. Makes sure that there is space for at least N bond lengths
# from the point to the edge of the box for that director. Also ensure the picked director is within
# angle radians of gDirector.
def genDirector(self,
point,
minNumPoints,
gDirector,
angle,
maxNumAttempts,
within=True):
numPoints = 0
maxNumPoints = 0
numLoops = 0
# loop until we exceed the minimum number of points requested or we have tried 10 times
while numPoints < minNumPoints and numLoops < maxNumAttempts:
if numLoops > 0:
print("Finding alternative director. Attempt: ", numLoops + 1,
"of ", maxNumAttempts)
if within:
# for choosing first generation unimers (must be within angle of gDirector)
theta, phi = coords.pickRandomPointOnUnitSphereInAngRange(
np.pi / 2 - angle, np.pi / 2, -np.pi, np.pi)
else:
# for choosing nth generation unimers (must be between angle and 2 angle of gdirector)
theta, phi = coords.pickRandomPointOnUnitSphereInAngRange(
np.pi / 2 - 2 * angle, np.pi / 2 - angle, -np.pi, np.pi)
# convert theta, phi pair to xyz vectors
directorHat = coords.sphericalPolar2XYZ(np.array([1.0, theta,
phi]))
# rotate director to take into account orientation of globalDirector
directorHatRot = coords.transformFromBlockFrameToLabFrame(
gDirector, np.array([0.0, 0.0, 0.0]), 0.0,
np.array([0.0, 0.0, 1.0]), np.array([0.0, 0.0, 0.0]),
[directorHat])[0]
# calculate distance along director vector to the outer edge of the box.
dist2Box = self.dist2Box(point, directorHatRot)
# compute number of points we can fit in there assuming straight line to edge of box
numPoints = int(dist2Box / self.bondLength)
# make a note of the direction that gives the largest number of points so far
if numPoints > maxNumPoints:
maxDirector = cp.copy(directorHatRot)
maxNumPoints = numPoints
if numPoints < minNumPoints:
print("low num points")
numLoops += 1
# if we have exited the loop then check to see if we have succeeded.
# if we have failed then return the best director we encountered.
if numPoints < minNumPoints:
print("Warning: Director choice resulted in short polymer")
numPoints = maxNumPoints
directorHatRot = maxDirector
return (directorHatRot, numPoints)
def generateNextUnimerGeneration(self, points, indices, unimersToGrowFrom):
# The points for the entire network are contained in flat list of points.
# Each unimer is identified by a tuple of indices referring to the start and end points in the array.
# The list of tuples is stored in indices.
# Unimers to Grow from is a list of unimers i.e. their position in the index list, from which to grow
# a new unimer.
# create an array to keep track of the index pairs of each new unimer we add them.
# This will form the list to grow from for the next generation.
newUnimersToGrowFrom = []
# loop through the unimers to grow from.
for unimerNum, unimer in enumerate(unimersToGrowFrom):
print("Generating Unimer: ", unimerNum + 1, " of ",
len(unimersToGrowFrom))
# get the indices of the current unimer from which we are going to branch
startIndex = indices[unimer][0]
endIndex = indices[unimer][1]
length = endIndex - startIndex
# compute how many branch points to add
numBranchPoints = int(float(length) * self.branchDensity)
# generate a list of indexes where the branches will happen
seedPoints = []
for _ in range(0, numBranchPoints):
newSeedPoint = rnd.randint(
startIndex + 2, endIndex - 2
) # don't use the first few points in a unimer - makes for crappy looking networks.
while newSeedPoint in seedPoints: # loop until we don't pick the same index multiple times
newSeedPoint = rnd.randint(startIndex + 2, endIndex - 2)
seedPoints += [newSeedPoint]
# loop through the selected seed points
for seedPoint in seedPoints:
# generate a director that is not within branch angle of the local
# seed unimer
director = self.genDirector(points[seedPoint],
self.minNumPointsUnimer,
points[seedPoint + 1] -
points[seedPoint],
self.minBranchAngle,
self.maxNumAttempts,
within=False)
if self.selfAvoid:
newUnimerXYZ = self.generateUnimer(
points[seedPoint], director[0], director[1],
points + self.pointsToAvoid, self.maxNumAttempts)
else:
newUnimerXYZ = self.generateUnimer(points[seedPoint],
director[0],
director[1],
self.pointsToAvoid,
self.maxNumAttempts)
# Add the current new unimer's point indices to the list of unimers start and stop indices - we subtract 1
# because the seed point is already in the parent unimer. We are only adding the new points.
indices += [(len(points), len(points) + len(newUnimerXYZ) - 1)]
# At this point this is the only time in the program we know the index values of
# both the parent and daughter unimers and where they are connected.
# so add this information to the graph.
# add the current seed point as a node if it isn't already there
if not self.networkGraph.has_node(seedPoint):
self.networkGraph.add_node(seedPoint)
# add the start index of the most recent unimer added to the unimer index list
if not self.networkGraph.has_node(indices[-1][0]):
self.networkGraph.add_node(indices[-1][0])
# connect those two nodes in the graph
self.networkGraph.add_edge(seedPoint, indices[-1][0])
# add the xyz points of the unimer to the growing list of xyzValues
# only add the new points - don't add the seed point which would be redundant.
points += cp.copy(newUnimerXYZ[1:])
# add the index number of the latest unimer to the newUnimersToGrowFrom list for the next gen
# subtract 1 because it is zero based, where the length of the array is not.
newUnimersToGrowFrom += [len(indices) - 1]
return points, indices, newUnimersToGrowFrom
# generates a single unimer which starts at point point, in direction of director
# avoiding all the points in xyzList, and uses global params in the class to
# define the unimer details.
def generateUnimer(self, point, director, numPoints, pointsToAvoid,
maxNumAttempts):
# half the time, scale the number of points by a random factor between 0.5 and 1.0
# otherwise all the unimers will leave the box
if rnd.uniform(0.0, 1.0) > 1.0:
numPoints *= rnd.uniform(0.5, 1.0)
# make the numPoints an integer
numPoints = int(numPoints)
# develop the frustum definition in the block frame of the unimer
z1 = -self.bondLength
r1 = self.bondLength
z2 = numPoints * self.bondLength
r2 = z2 * np.tan(self.coneAngle / 2.0)
localEnvelopeList = [
"frustum " + str(z1) + ' ' + str(r1) + ' ' + str(z2) + ' ' +
str(r2)
]
if numPoints == 0:
print("Zero Length Polymer")
numPointsOutside = numPoints
numLoops = 0
# loop until we create a unimer that satisfies constraints. Can set maxNumAttempts depending on how bothered we are about constraints.
while numPointsOutside > 0 and numLoops < maxNumAttempts:
if numLoops > 0:
print(
"Re-generating Unimer - exceeds global envelope. Attempt: ",
numLoops + 1, "of ", maxNumAttempts)
# generate the unimer in it's own block frame starting at origin. Don't worry about outer envelope or other points at this stage
unimer = self.RPPBBG.generateBuildingBlock(
numPoints,
np.array([0.0, 0.0, 0.0]),
self.alpha1,
self.alpha2,
self.beta1,
self.beta2,
self.monomerMinDist,
self.bondLength,
pointsToAvoid=[],
envelopeList=localEnvelopeList,
SpaceCurveTransform=self.SpaceCurveTransform)
#visualiseEnvelope=(100000,200,'envelopeUnimer.xyz'))
if self.dumpInterimFiles == 1:
fIO.saveXYZ(unimer.blockXYZVals, 'Ca', 'preRotUnimer.xyz')
# now rotate and translate the unimer xyzVals to their final point
rotXYZVals = coords.transformFromBlockFrameToLabFrame(
director, point, 0.0, np.array([0.0, 0.0, 1.0]),
np.array([0.0, 0.0, 0.0]), unimer.blockXYZVals)
# Now check that the unimer is entirely within the outer box, and any global specified user envelope,
# Also make sure that the unimer is networkMinDist points away from existing pointsToAvoid.
# Won't self check the unimer against itself only the points to avoid. Allows to have two minDists.
# One for the monomer distance along the backbone, and one for the distance between unimers (2 * worm tube radius).
# enables the unimer bondlength to be small which makes for smoother unimer chains.
numPointsOutside = len(
self.checkEnvelope(rotXYZVals,
ignorePTA=False,
pointsToAvoid=pointsToAvoid))
# increment loop counter
numLoops += 1
return rotXYZVals
# def choosePointsToAvoid(self, points, Z1, R1, Z2, R2):
# # go through points and keep any points that are inside the frustum
# outPoints = []
# for point in points:
# if coords.checkPointInFrustum(point, Z1, R1, Z2, R2, 0):
# outPoints += [ point ]
# return outPoints
def dist2Box(self, point, director):
# Find the distance from the point to the outer box in the direction of director
# compute the line parameter where the given line intersects each of the six planes of the box.
paramVals = []
paramVals += [
cart.distanceOfLineToAPlane(point, director,
np.array([self.x1, 0, 0]),
np.array([1.0, 0.0, 0.0]))
]
paramVals += [
cart.distanceOfLineToAPlane(point, director,
np.array([self.x2, 0, 0]),
np.array([1.0, 0.0, 0.0]))
]
paramVals += [
cart.distanceOfLineToAPlane(point, director,
np.array([0, self.y1, 0]),
np.array([0.0, 1.0, 0.0]))
]
paramVals += [
cart.distanceOfLineToAPlane(point, director,
np.array([0, self.y2, 0]),
np.array([0.0, 1.0, 0.0]))
]
paramVals += [
cart.distanceOfLineToAPlane(point, director,
np.array([0, 0, self.z1]),
np.array([0.0, 0.0, 1.0]))
]
paramVals += [
cart.distanceOfLineToAPlane(point, director,
np.array([0, 0, self.z2]),
np.array([0.0, 0.0, 1.0]))
]
# choose the smallest +ve distance. (selects the plane in the director of director)
# when the line is parallel with the plane we're not bothered about that plane.
# when the line goes through the corner of the box or two of the planes, it's the same distance
# so we don't care. Automatically handles these cases.
return min([a for a in paramVals if a > 0.0])
Unimers = []
for i in range(numUnimers):
print(i, "unimers out of: ", numUnimers)
envelopeList = [
'frustum ' + str(brushDict1['Z1'] - brushDict1['minDist']) + ' ' +
str(brushDict1['R1']) + ' ' + str(brushDict1['Z2']) + ' ' +
str(brushDict1['R2'])
]
polyStart = np.array([0.0, 0.0, brushDict1['Z1']])
UnimerBB = unimerBBG.generateBuildingBlock(
brushDict1['numMonomers'],
polyStart,
brushDict1['alpha1'],
brushDict1['alpha2'],
brushDict1['beta1'],
brushDict1['beta2'],
brushDict1['minDist'],
brushDict1['bondLength'],
envelopeList=envelopeList,
visualiseEnvelope=(0, 100, brushDict1['name'] + '_envelope.xyz'))
fIO.saveXYZList(UnimerBB.blockXYZVals, brushDict1['monomerNames'],
'Unimer_' + str(i) + '.xyz')
Unimers.append((UnimerBB.blockXYZVals, brushDict1['monomerNames']))
for directorHat, pos, strand in zip(unimerDirectors, UnimerSpherePoints,
Unimers):
labRotation = rnd.uniform(0, 2 * np.pi)
xyzVals = coords.transformFromBlockFrameToLabFrame(