def _read_particles(self):
if not os.path.exists(self.particle_filename): return
with open(self.particle_filename, 'r') as f:
lines = f.readlines()
self.num_stars = int(lines[0].strip().split(' ')[0])
for num, line in enumerate(lines[1:]):
particle_position_x = float(line.split(' ')[1])
particle_position_y = float(line.split(' ')[2])
particle_position_z = float(line.split(' ')[3])
coord = [particle_position_x, particle_position_y, particle_position_z]
# for each particle, determine which grids contain it
# copied from object_finding_mixin.py
mask = np.ones(self.num_grids)
for i in range(len(coord)):
np.choose(np.greater(self.grid_left_edge.d[:,i],coord[i]), (mask,0), mask)
np.choose(np.greater(self.grid_right_edge.d[:,i],coord[i]), (0,mask), mask)
ind = np.where(mask == 1)
selected_grids = self.grids[ind]
# in orion, particles always live on the finest level.
# so, we want to assign the particle to the finest of
# the grids we just found
if len(selected_grids) != 0:
grid = sorted(selected_grids, key=lambda grid: grid.Level)[-1]
ind = np.where(self.grids == grid)[0][0]
self.grid_particle_count[ind] += 1
self.grids[ind].NumberOfParticles += 1
# store the position in the *.sink file for fast access.
try:
self.grids[ind]._particle_line_numbers.append(num + 1)
except AttributeError:
self.grids[ind]._particle_line_numbers = [num + 1]
评论列表
文章目录
