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DAMASK_EICMD
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direct selection of valid seed coordinates within subfraction of unit cube instead of check and repeat

This commit is contained in:
Philip Eisenlohr 2018-03-07 17:45:22 -05:00
parent 03c643c433
commit 32c34457c2
1 changed files with 4 additions and 18 deletions
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22
processing/pre/seeds_fromRandom.py
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@ -166,25 +166,11 @@ for name in filenames:
grainEuler[2,:] *= 360.0 # phi_2 is uniformly distributed
if not options.selective:
seeds = np.array([])
n = np.array(options.grid * options.fraction,dtype=int) # find valid grid indices within fraction
meshgrid = np.meshgrid(*map(np.arange,n),indexing='ij') # create a meshgrid within fraction
while len(seeds) < options.N:
theSeeds = np.zeros((options.N,3),dtype=float) # seed positions array
gridpoints = random.sample(range(gridSize),options.N) # choose first N from random permutation of grid positions
theSeeds[:,0] = (np.mod(gridpoints ,options.grid[0])\
+np.random.random(options.N)) /options.grid[0]
theSeeds[:,1] = (np.mod(gridpoints// options.grid[0] ,options.grid[1])\
+np.random.random(options.N)) /options.grid[1]
theSeeds[:,2] = (np.mod(gridpoints//(options.grid[1]*options.grid[0]),options.grid[2])\
+np.random.random(options.N)) /options.grid[2]
goodSeeds = theSeeds[np.all(theSeeds<=options.fraction,axis=1)] # pick seeds within threshold fraction
seeds = goodSeeds if len(seeds) == 0 else np.vstack((seeds,goodSeeds))
if len(seeds) > options.N: seeds = seeds[:min(options.N,len(seeds))]
seeds = seeds.T # switch layout to point index as last index
coords = np.vstack((meshgrid[0],meshgrid[1],meshgrid[2])).reshape(3,n.prod()).T # assemble list of 3D coordinates
seeds = ((random.sample(coords,options.N)+np.random.random(options.N*3).reshape(options.N,3))/options.grid).T # pick options.N of those and rattle position
else: