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Use the fact that helmholtz k is real for better codegen #176

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Use the fact that helmholtz k is real for better codegen #176

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fed0d48
Use the fact that helmholtz k is real for better codegen
isuruf May 30, 2023
154bbe6
Fix expr
isuruf May 31, 2023
495dfc5
rewrite at codegen time
isuruf May 31, 2023
abf6db9
Use a symbolic function
isuruf Jun 1, 2023
51eb520
Fix conversions
isuruf Jun 1, 2023
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4 changes: 4 additions & 0 deletions sumpy/kernel.py
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Original file line number Diff line number Diff line change
Expand Up @@ -519,6 +519,10 @@ def __init__(self, dim, helmholtz_k_name="k",
scaling = var("I")/4
elif dim == 3:
r = pymbolic_real_norm_2(make_sym_vector("d", dim))
if allow_evanescent:
expr = var("exp")(var("I")*k*r)/r
else:
expr = (var("cos")(k*r) + var("I")*var("sin")(k*r))/r
expr = var("exp")(var("I")*k*r)/r
scaling = 1/(4*var("pi"))
else:
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