Simplices for element references #777
Description
Recent nutils updates breaks our immersed scripts (for example: potential-flow and img2mesh). This is mainly related to simplices of an element reference. It doesn't return transforms and references for TensorReference and not implemented/removed for WithChildrenReference. Is it introduced in a different form? If so, do you have an alternative for the following snippet?
def get_fragment_topo(self):
references = []
transforms = []
opposites = []
for elemrefs, elemtrans, elemopp in zip(self.references,self.transforms, self.opposites):
for trans, refs in elemrefs.simplices:
references.append(refs)
transforms.append(elemtrans+(trans,))
opposites.append(elemopp+(trans,))
references = elementseq.References.from_iter(references, self.ndims)
opposites = transformseq.PlainTransforms(opposites , fromdims=self.ndims, todims=self.ndims)
transforms = transformseq.PlainTransforms(transforms, fromdims=self.ndims, todims=self.ndims)
# spaces of the topology
space, = self.spaces
return topology.TransformChainsTopology(space, references, transforms, opposites)