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DAMASK_EICMD
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significant speed improvement for large grids. 

polished messages and fixed error reporting bug.
This commit is contained in:
Philip Eisenlohr 2014-09-24 23:47:52 +00:00
parent 1c38d42a0b
commit b85797c109
1 changed files with 42 additions and 25 deletions
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67
processing/pre/seeds_fromRandom.py
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@ -31,38 +31,55 @@ parser.set_defaults(grid = (16,16,16))
parser.set_defaults(N = 20) parser.set_defaults(N = 20)
(options, extras) = parser.parse_args() (options, extras) = parser.parse_args()
options.grid = np.array(options.grid)
Npoints = reduce(lambda x, y: x * y, options.grid) sys.stderr.write('\033[1m'+scriptName+'\033[0m\n')
if 0 in options.grid:
file['croak'].write('invalid grid a b c.\n') gridSize = options.grid.prod()
if gridSize == 0:
sys.stderr.write('zero grid dimension for %s.\n'%(', '.join([['a','b','c'][x] for x in np.where(options.grid == 0)[0]])))
sys.exit() sys.exit()
if options.N > Npoints: if options.N > gridSize:
sys.stderr.write('Warning: more seeds than grid points at minimum resolution.\n') sys.stderr.write('accommodating only %i seeds on grid.\n'%gridSize)
options.N = Npoints options.N = gridSize
if options.randomSeed == None: if options.randomSeed == None:
options.randomSeed = int(os.urandom(4).encode('hex'), 16) options.randomSeed = int(os.urandom(4).encode('hex'), 16)
np.random.seed(options.randomSeed) # init random generators
random.seed(options.randomSeed)
seeds = np.zeros((3,options.N),float) grainEuler = np.random.rand(3,options.N) # create random Euler triplets
np.random.seed(options.randomSeed) grainEuler[0,:] *= 360.0 # phi_1 is uniformly distributed
grainEuler[1,:] = np.arccos(2*grainEuler[1,:]-1)*180.0/math.pi # cos(Phi) is uniformly distributed
grainEuler[2,:] *= 360.0 # phi_2 is uniformly distributed
grainEuler = np.random.rand(3,options.N) seedpoints = -np.ones(options.N,dtype='int') # init grid positions of seed points
grainEuler[0,:] *= 360.0
grainEuler[1,:] = np.arccos(2*grainEuler[1,:]-1)*180.0/math.pi
grainEuler[2,:] *= 360.0
seedpoint = np.random.permutation(Npoints)[:options.N] if options.N * 1024 < gridSize: # heuristic limit for random search
seeds[0,:]=(np.mod(seedpoint ,options.grid[0])\ i = 0
+np.random.random())/options.grid[0] while i < options.N: # until all (unique) points determined
seeds[1,:]=(np.mod(seedpoint// options.grid[0] ,options.grid[1])\ p = np.random.randint(gridSize) # pick a location
+np.random.random())/options.grid[1] if p not in seedpoints: # not yet taken?
seeds[2,:]=(np.mod(seedpoint//(options.grid[1]*options.grid[0]),options.grid[2])\ seedpoints[i] = p # take it
+np.random.random())/options.grid[2] i += 1 # advance stepper
else:
seedpoints = np.array(random.sample(range(gridSize),options.N)) # create random permutation of all grid positions and choose first N
sys.stdout.write("5\theader\n") seeds = np.zeros((3,options.N),float) # init seed positions
sys.stdout.write(scriptID + " " + " ".join(sys.argv[1:])+"\n") seeds[0,:] = (np.mod(seedpoints ,options.grid[0])\
sys.stdout.write("grid\ta {}\tb {}\tc {}\n".format(options.grid[0],options.grid[1],options.grid[2])) +np.random.random())/options.grid[0]
sys.stdout.write("microstructures\t{}\n".format(options.N)) seeds[1,:] = (np.mod(seedpoints// options.grid[0] ,options.grid[1])\
sys.stdout.write("randomSeed\t{}\n".format(options.randomSeed)) +np.random.random())/options.grid[1]
sys.stdout.write("x\ty\tz\tphi1\tPhi\tphi2\n") seeds[2,:] = (np.mod(seedpoints//(options.grid[1]*options.grid[0]),options.grid[2])\
+np.random.random())/options.grid[2]
header = ["5\theader",
scriptID + " " + " ".join(sys.argv[1:]),
"grid\ta {}\tb {}\tc {}".format(options.grid[0],options.grid[1],options.grid[2]),
"microstructures\t{}".format(options.N),
"randomSeed\t{}".format(options.randomSeed),
"x\ty\tz\tphi1\tPhi\tphi2",
]
for line in header:
sys.stdout.write(line+"\n")
np.savetxt(sys.stdout,np.transpose(np.concatenate((seeds,grainEuler),axis = 0)),fmt='%10.6f',delimiter='\t') np.savetxt(sys.stdout,np.transpose(np.concatenate((seeds,grainEuler),axis = 0)),fmt='%10.6f',delimiter='\t')