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Cell Vanka coloring using FVM++ adjacency #5044

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Cell Vanka coloring using FVM++ adjacency #5044

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12 changes: 11 additions & 1 deletion firedrake/preconditioners/asm.py
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Original file line number Diff line number Diff line change
Expand Up @@ -245,8 +245,18 @@ def splitting(V):
V_local_ises_indices = tuple(iset.indices for iset in V.dof_dset.local_ises)
Z_local_ises_indices = splitting(V_local_ises_indices)

# Compute the coloring
useCone, useClosure = mesh_dm.getBasicAdjacency()
if depth == mesh_dm.getDimension():
distance = 2
mesh_dm.setBasicAdjacency(True, True)
else:
distance = 3
mesh_dm.setBasicAdjacency(False, True)
colors = get_colors(mesh_dm, use_coloring, depth, distance=distance)
mesh_dm.setBasicAdjacency(useCone, useClosure)

# Build index sets for the patches
colors = get_colors(mesh_dm, use_coloring, depth, distance=3)
ises = [build_vanka_indices(Z, Z_local_ises_indices, mesh_dm, ordering, self.prefix,
include_star, color) for color in colors]
return ises
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