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comparison src/SbpOperators/volumeops/volume_operator.jl @ 1221:b3b4d29b46c3 refactor/grids

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Merge default
author Jonatan Werpers <jonatan@werpers.com>
date Fri, 10 Feb 2023 08:36:56 +0100
parents 716e721ce3eb
children f1c2a4fa0ee1 356ec6a72974 102ebdaf7c11
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1220:93bba649aea2 1221:b3b4d29b46c3
1 """
2 volume_operator(grid, inner_stencil, closure_stencils, parity, direction)
3
4 Creates a volume operator on a `Dim`-dimensional grid acting along the
5 specified coordinate `direction`. The action of the operator is determined by
6 the stencils `inner_stencil` and `closure_stencils`. When `Dim=1`, the
7 corresponding `VolumeOperator` tensor mapping is returned. When `Dim>1`, the
8 returned operator is the appropriate outer product of a one-dimensional
9 operators and `IdentityTensor`s, e.g for `Dim=3` the volume operator in the
10 y-direction is `I⊗op⊗I`.
11 """
12 function volume_operator(grid::EquidistantGrid, inner_stencil, closure_stencils, parity, direction)
13 #TODO: Check that direction <= Dim?
14
15 # Create 1D volume operator in along coordinate direction
16 op = VolumeOperator(restrict(grid, direction), inner_stencil, closure_stencils, parity)
17 # Create 1D IdentityTensors for each coordinate direction
18 one_d_grids = restrict.(Ref(grid), Tuple(dims(grid)))
19 Is = IdentityTensor{eltype(grid)}.(size.(one_d_grids))
20 # Formulate the correct outer product sequence of the identity mappings and
21 # the volume operator
22 parts = Base.setindex(Is, op, direction)
23 return foldl(⊗, parts)
24 end
25
26 """ 1 """
27 VolumeOperator{T,N,M,K} <: LazyTensor{T,1,1} 2 VolumeOperator{T,N,M,K} <: LazyTensor{T,1,1}
3
28 Implements a one-dimensional constant coefficients volume operator 4 Implements a one-dimensional constant coefficients volume operator
29 """ 5 """
30 struct VolumeOperator{T,N,M,K} <: LazyTensor{T,1,1} 6 struct VolumeOperator{T,N,M,K} <: LazyTensor{T,1,1}
31 inner_stencil::Stencil{T,N} 7 inner_stencil::Stencil{T,N}
32 closure_stencils::NTuple{M,Stencil{T,K}} 8 closure_stencils::NTuple{M,Stencil{T,K}}
57 33
58 function LazyTensors.apply(op::VolumeOperator, v::AbstractVector, i) 34 function LazyTensors.apply(op::VolumeOperator, v::AbstractVector, i)
59 r = getregion(i, closure_size(op), op.size[1]) 35 r = getregion(i, closure_size(op), op.size[1])
60 return LazyTensors.apply(op, v, Index(i, r)) 36 return LazyTensors.apply(op, v, Index(i, r))
61 end 37 end
38 # TODO: Move this to LazyTensors when we have the region communication down.