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Fix 2/3 rule filter #245

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Fix 2/3 rule filter #245

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4 changes: 2 additions & 2 deletions jax_cfd/spectral/utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -129,8 +129,8 @@ def brick_wall_filter_2d(grid: grids.Grid):
"""Implements the 2/3 rule."""
n, m = grid.shape
filter_ = jnp.zeros((n, m // 2 + 1))
filter_ = filter_.at[:int(2 / 3 * n) // 2, :int(2 / 3 * (m // 2 + 1))].set(1)
filter_ = filter_.at[-int(2 / 3 * n) // 2:, :int(2 / 3 * (m // 2 + 1))].set(1)
filter_ = filter_.at[:(int(2 / 3 * n) // 2 + 1), :int(2 / 3 * (m // 2 + 1))].set(1)
filter_ = filter_.at[-(int(2 / 3 * n) // 2):, :int(2 / 3 * (m // 2 + 1))].set(1)
return filter_


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