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DofHandler with any <: AbstractGrid (#379)
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| Original file line number | Diff line number | Diff line change |
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| @testset "AbstractGrid" begin | ||
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| struct SmallGrid{dim,N,C<:Ferrite.AbstractCell} <: Ferrite.AbstractGrid{dim} | ||
| nodes_test::Vector{NTuple{dim,Float64}} | ||
| cells_test::NTuple{N,C} | ||
| end | ||
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| Ferrite.getcells(grid::SmallGrid) = grid.cells_test | ||
| Ferrite.getcells(grid::SmallGrid, v::Union{Int, Vector{Int}}) = grid.cells_test[v] | ||
| Ferrite.getncells(grid::SmallGrid{dim,N}) where {dim,N} = N | ||
| Ferrite.getcelltype(grid::SmallGrid) = eltype(grid.cells_test) | ||
| Ferrite.getcelltype(grid::SmallGrid, i::Int) = typeof(grid.cells_test[i]) | ||
| Ferrite.getcoordinates(x::NTuple{dim,Float64}) where dim = Vec{dim,Float64}(x) | ||
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| Ferrite.getnodes(grid::SmallGrid) = grid.nodes_test | ||
| Ferrite.getnodes(grid::SmallGrid, v::Union{Int, Vector{Int}}) = grid.nodes_test[v] | ||
| Ferrite.getnnodes(grid::SmallGrid) = length(grid.nodes_test) | ||
| Ferrite.nnodes_per_cell(grid::SmallGrid, i::Int=1) = Ferrite.nnodes(grid.cells_test[i]) | ||
| Ferrite.n_faces_per_cell(grid::SmallGrid) = nfaces(eltype(grid.cells_test)) | ||
| function Ferrite.getcoordinates!(x::Vector{Vec{dim,T}}, grid::SmallGrid, cell::Int) where {dim,T} | ||
| for i in 1:length(x) | ||
| x[i] = Vec{dim,T}(grid.nodes_test[grid.cells_test[cell].nodes[i]]) | ||
| end | ||
| end | ||
| function Ferrite.getcoordinates(grid::SmallGrid{dim}, cell::Int) where dim | ||
| nodeidx = grid.cells_test[cell].nodes | ||
| return [Vec{dim,Float64}(grid.nodes_test[i]) for i in nodeidx]::Vector{Vec{dim,Float64}} | ||
| end | ||
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| nodes = [(-1.0,-1.0); (0.0,-1.0); (1.0,-1.0); (-1.0,0.0); (0.0,0.0); (1.0,0.0); (-1.0,1.0); (0.0,1.0); (1.0,1.0)] | ||
| cells = (Quadrilateral((1,2,5,4)), Quadrilateral((2,3,6,5)), Quadrilateral((4,5,8,7)), Quadrilateral((5,6,9,8))) | ||
| subtype_grid = SmallGrid(nodes,cells) | ||
| reference_grid = generate_grid(Quadrilateral, (2,2)) | ||
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| ip = Lagrange{2, RefCube, 1}() | ||
| qr = QuadratureRule{2, RefCube}(2) | ||
| cellvalues = CellScalarValues(qr, ip); | ||
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| dhs = [DofHandler(grid) for grid in (subtype_grid, reference_grid)] | ||
| u1 = Vector{Float64}(undef, 9) | ||
| u2 = Vector{Float64}(undef, 9) | ||
| ∂Ω = union(getfaceset.((reference_grid, ), ["left", "right", "top", "bottom"])...) | ||
| dbc = Dirichlet(:u, ∂Ω, (x, t) -> 0) | ||
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| function doassemble!(cellvalues::CellScalarValues{dim}, K::SparseMatrixCSC, dh::DofHandler) where {dim} | ||
| n_basefuncs = getnbasefunctions(cellvalues) | ||
| Ke = zeros(n_basefuncs, n_basefuncs) | ||
| fe = zeros(n_basefuncs) | ||
| f = zeros(ndofs(dh)) | ||
| assembler = start_assemble(K, f) | ||
| for cellid in 1:getncells(dh.grid) | ||
| fill!(Ke, 0) | ||
| fill!(fe, 0) | ||
| coords = getcoordinates(dh.grid, cellid) | ||
| reinit!(cellvalues, coords) | ||
| for q_point in 1:getnquadpoints(cellvalues) | ||
| dΩ = getdetJdV(cellvalues, q_point) | ||
| for i in 1:n_basefuncs | ||
| v = shape_value(cellvalues, q_point, i) | ||
| ∇v = shape_gradient(cellvalues, q_point, i) | ||
| fe[i] += v * dΩ | ||
| for j in 1:n_basefuncs | ||
| ∇u = shape_gradient(cellvalues, q_point, j) | ||
| Ke[i, j] += (∇v ⋅ ∇u) * dΩ | ||
| end | ||
| end | ||
| end | ||
| assemble!(assembler, celldofs(dh,cellid), fe, Ke) | ||
| end | ||
| return K, f | ||
| end | ||
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| for (dh,u) in zip(dhs,(u1,u2)) | ||
| push!(dh, :u, 1) | ||
| close!(dh) | ||
| ch = ConstraintHandler(dh) | ||
| add!(ch, dbc) | ||
| close!(ch) | ||
| update!(ch, 0.0) | ||
| K = create_sparsity_pattern(dh); | ||
| K, f = doassemble!(cellvalues, K, dh); | ||
| apply!(K, f, ch) | ||
| sol = K \ f | ||
| u .= sol | ||
| end | ||
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| @test Ferrite.ndofs_per_cell(dhs[1]) == Ferrite.ndofs_per_cell(dhs[2]) | ||
| @test Ferrite.celldofs(dhs[1],3) == Ferrite.celldofs(dhs[2],3) | ||
| @test Ferrite.ndofs(dhs[1]) == Ferrite.ndofs(dhs[2]) | ||
| @test isapprox(u1,u2,atol=1e-8) | ||
| end |