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annotate src/SbpOperators/volumeops/volume_operator.jl @ 2015:5c2448d6a201 feature/grids/geometry_functions tip

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Structure tests a bit more
author Jonatan Werpers <jonatan@werpers.com>
date Fri, 09 May 2025 15:57:38 +0200
parents 0656b46a1a74
children
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1 """
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2 VolumeOperator{T,N,M,K} <: LazyTensor{T,1,1}
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4 A one-dimensional constant coefficients stencil operator.
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5 """
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6 struct VolumeOperator{T,N,M,K} <: LazyTensor{T,1,1}
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7 inner_stencil::Stencil{T,N}
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8 closure_stencils::NTuple{M,Stencil{T,K}}
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9 size::Int
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10 parity::Parity
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11
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12 function VolumeOperator(inner_stencil::Stencil{T,N}, closure_stencils::Tuple{Stencil{T,K}, Vararg{Stencil{T,K}}}, size::Int, parity::Parity) where {T,N,K}
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13 M = length(closure_stencils)
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14 return new{T,N,M,K}(inner_stencil, closure_stencils, size, parity)
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15 end
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16 end
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18 function VolumeOperator(grid::EquidistantGrid, inner_stencil, closure_stencils, parity)
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19 return VolumeOperator(inner_stencil, Tuple(closure_stencils), size(grid,1), parity)
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20 end # TBD: Remove this function?
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22 closure_size(::VolumeOperator{T,N,M}) where {T,N,M} = M
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23
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24 LazyTensors.range_size(op::VolumeOperator) = (op.size,)
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25 LazyTensors.domain_size(op::VolumeOperator) = (op.size,)
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27 function LazyTensors.apply(op::VolumeOperator, v::AbstractVector, i::Index{Lower})
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28 return @inbounds apply_stencil(op.closure_stencils[Int(i)], v, Int(i))
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29 end
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30
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31 function LazyTensors.apply(op::VolumeOperator, v::AbstractVector, i::Index{Interior})
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32 return apply_stencil(op.inner_stencil, v, Int(i))
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33 end
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35 function LazyTensors.apply(op::VolumeOperator, v::AbstractVector, i::Index{Upper})
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36 return @inbounds Int(op.parity)*apply_stencil_backwards(op.closure_stencils[op.size-Int(i)+1], v, Int(i))
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37 end
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39 function LazyTensors.apply(op::VolumeOperator, v::AbstractVector, i)
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40 r = getregion(i, closure_size(op), op.size)
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41 return LazyTensors.apply(op, v, Index(i, r))
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42 end
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43 # TODO: Move this to LazyTensors when we have the region communication down.