Interpolation into MultiMeshFunctionSpace not implemented

[Anders Logg (Chalmers)]

Support interpolation of Expression into MultiMeshFunctionSpace.

[Anders Logg (Chalmers)]

Removing milestone: 1.7 (automated comment)

[Jørgen Dokken]

I tried to fix this by trying to interpolate the expression onto each Function in the MultiMeshFunction.

from dolfin import *
mesh_0 = RectangleMesh(Point(0, 0), Point(1, 1), 16, 16)
mesh_1 = RectangleMesh(Point(0.2, 0.1), Point(0.3, 0.5), 20, 20)
multimesh = MultiMesh()
multimesh.add(mesh_0)
multimesh.add(mesh_1)
multimesh.build()
V = MultiMeshFunctionSpace(multimesh, "Lagrange", 1)
v = MultiMeshFunction(V)
f = Expression("2")
v0 = v.part(0)
v0.interpolate(f)

This produces the following error:

------------------------------------------------------------------------- Error: Unable to interpolate function into function space. Reason: Wrong size of vector. Where: This error was encountered inside FunctionSpace.cpp. *** Process: 0

---

DOLFIN version: 2016.2.0.dev0 Git changeset: 8ea1b4e1a38f15458276d95fe8d751b36c3269b6 *** -------------------------------------------------------------------------

It seems like there is some error in the initialization of _vector for each function and I'm not sure how to fix it.

[Jan Blechta]

I've already encountered non-matching multimesh vector dimension here. It seems that this is a design by purpose, not a bug.

[Jørgen Dokken]

Ok, I'm not going to try to fix this issue at the moment, looking forward to having someone fix this issue

[Anders Logg (Chalmers)]

Fixed since before