Fix interpolation for Arguments of zany spaces #286
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Previously we only checked if any coefficients in the source expression needed a coordinate mapping, but we should also check if any arguments do.
When determinining if the kernel needs a coordinate mapping we need to check if terminal elements need it (e.g. VectorElement(Argyris)). Previously we only checked the top-level element type which was incorrect for this case.
wence-
commented
Jan 30, 2023
| @needs_coordinate_mapping.register(finat.HDivElement) | ||
| @needs_coordinate_mapping.register(finat.HCurlElement) | ||
| def _needs_coordinate_mapping_finat_hdivcurl(element): | ||
| return needs_coordinate_mapping(element.wrappee) |
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I put this here because it meant I didn't need a PR in finat as well, but probably finat should offer a traverse function that yields all the elements in a structured element. Everything needs special-casing because elements don't have regular "children" slots.
e.g. ideally you would just write (if you don't care about ordering)
def traverse(element):
yield element
yield from map(traverse, element.children)
wence-
commented
Jan 30, 2023
| expr = ufl.TestFunction(Q) | ||
| to_element = create_element(V.ufl_element()) | ||
| kernel = compile_expression_dual_evaluation(expr, to_element, V.ufl_element()) | ||
| assert kernel.needs_external_coords |
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Not checking for correctness, just that a kernel actually comes out the other end.
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Previously we only checked if any coefficients in the source expression needed a coordinate mapping, but we should also check if any arguments do.