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annotate src/Grids/tensor_grid.jl @ 1236:95e294576c2a refactor/grids

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Implement boundary methods for TensorGrid
author Jonatan Werpers <jonatan@werpers.com>
date Sun, 19 Feb 2023 22:50:02 +0100
parents 5f677cd6f0b6
children 6f75f2d2bf5c
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1 struct TensorGrid{T,D,RD,GT<:NTuple{N,Grid} where N} <: Grid{T,D,RD}
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2 grids::GT
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3
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4 function TensorGrid(gs...)
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5 T = eltype(gs[1]) # All gs should have the same T
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6 D = sum(ndims,gs)
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7 RD = sum(nrangedims, gs)
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8
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9 return new{T,D,RD,typeof(gs)}(gs)
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10 end
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11 end
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12
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13 function Base.size(g::TensorGrid)
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14 return concatenate_tuples(size.(g.grids)...)
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15 end
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16
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17 function Base.getindex(g::TensorGrid, I...)
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18 szs = ndims.(g.grids)
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19
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20 Is = split_tuple(I, szs)
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21 ps = map((g,I)->SVector(g[I...]), g.grids, Is)
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22
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23 return vcat(ps...)
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24 end
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25
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26 IndexStyle(::TensorGrid) = IndexCartesian()
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27
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28 function Base.eachindex(g::TensorGrid)
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29 szs = concatenate_tuples(size.(g.grids)...)
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30 return CartesianIndices(szs)
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31 end
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32
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33
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34 struct TensorBoundary{N, BID<:BoundaryIdentifier} <: BoundaryIdentifier end
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35 grid_id(::TensorBoundary{N, BID}) where {N, BID} = N
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36 boundary_id(::TensorBoundary{N, BID}) where {N, BID} = BID()
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38
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39 """
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40 boundary_identifiers(::TensorGrid)
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41
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42 Returns a tuple containing the boundary identifiers for the grid.
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43 """
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44 function boundary_identifiers(g::TensorGrid)
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45 n = length(g.grids)
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46 per_grid = map(eachindex(g.grids)) do i
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47 return map(bid -> TensorBoundary{i, bid}(), boundary_identifiers(g.grids[i]))
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48 end
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49 return concatenate_tuples(per_grid...)
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50 end
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53 """
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54 boundary_grid(grid::TensorGrid, id::TensorBoundary)
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55
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56 The grid for the boundary specified by `id`.
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57 """
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58 function boundary_grid(g::TensorGrid, bid::TensorBoundary)
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59 local_boundary_grid = boundary_grid(g.grids[grid_id(bid)], boundary_id(bid))
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60 new_grids = Base.setindex(g.grids, local_boundary_grid, grid_id(bid))
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61 return TensorGrid(new_grids...)
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62 end