guilhem_lavaux/JaxPM
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This commit is contained in:
Wassim KABALAN 2024-08-03 00:23:40 +02:00
parent 831291c1f9
commit ece8c93540
12 changed files with 210 additions and 170 deletions
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9
jaxpm/pm.py
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@ -19,10 +19,11 @@ def pm_forces(positions, mesh_shape=None, delta=None, r_split=0, halo_size=0):
Computes gravitational forces on particles using a PM scheme
"""
if mesh_shape is None:
assert(delta is not None) , "If mesh_shape is not provided, delta should be provided"
assert (delta is not None
), "If mesh_shape is not provided, delta should be provided"
mesh_shape = delta.shape
kvec = fftk(mesh_shape)
if delta is None:
delta_k = fft3d(cic_paint_dx(positions, halo_size=halo_size))
else:
@ -33,8 +34,8 @@ def pm_forces(positions, mesh_shape=None, delta=None, r_split=0, halo_size=0):
r_split=r_split)
# Computes gravitational forces
forces = jnp.stack([
cic_read_dx(ifft3d(gradient_kernel(kvec, i) * pot_k), halo_size=halo_size)
for i in range(3)
cic_read_dx(ifft3d(gradient_kernel(kvec, i) * pot_k),
halo_size=halo_size) for i in range(3)
],
axis=-1)