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annotate SbpOperators/src/BoundaryValue.jl @ 306:f8a4850caed2

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Move BoundaryValue from Laplace to separate file. Currently WIP
author Vidar Stiernström <vidar.stiernstrom@it.uu.se>
date Wed, 09 Sep 2020 21:06:27 +0200
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306
f8a4850caed2 Move BoundaryValue from Laplace to separate file. Currently WIP
Vidar Stiernström <vidar.stiernstrom@it.uu.se>
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1 """
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2 BoundaryValue{T,N,M,K} <: TensorMapping{T,2,1}
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3
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4 Implements the boundary operator `e` as a TensorMapping
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5 """
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6 struct BoundaryValue{T,N,M,K} <: TensorMapping{T,2,1}
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7 eClosure::Stencil{T,M}
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8 bId::CartesianBoundary
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9 end
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10 export BoundaryValue
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11
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12 # TODO: This is obviouly strange. Is domain_size just discarded? Is there a way to avoid storing grid in BoundaryValue?
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13 # Can we give special treatment to TensorMappings that go to a higher dim?
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14 function LazyTensors.range_size(e::BoundaryValue{T}, domain_size::NTuple{1,Integer}) where T
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15 if dim(e.bId) == 1
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16 return (UnknownDim, domain_size[1])
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17 elseif dim(e.bId) == 2
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18 return (domain_size[1], UnknownDim)
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19 end
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20 end
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21 LazyTensors.domain_size(e::BoundaryValue{T}, range_size::NTuple{2,Integer}) where T = (range_size[3-dim(e.bId)],)
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22 # TODO: Make a nicer solution for 3-dim(e.bId)
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23
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24 # TODO: Make this independent of dimension
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25 function LazyTensors.apply(e::BoundaryValue{T}, v::AbstractArray{T}, I::NTuple{2,Index}) where T
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26 i = I[dim(e.bId)]
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27 j = I[3-dim(e.bId)]
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28 N_i = size(e.grid)[dim(e.bId)]
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29 return apply_boundary_value(e.op, v[j], i, N_i, region(e.bId))
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30 end
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31
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32 function LazyTensors.apply_transpose(e::BoundaryValue{T}, v::AbstractArray{T}, I::NTuple{1,Index}) where T
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33 u = selectdim(v,3-dim(e.bId),Int(I[1]))
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34 return apply_boundary_value_transpose(e.op, u, region(e.bId))
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35 end
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36
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37 function apply_boundary_value_transpose(op::ConstantStencilOperator, v::AbstractVector, ::Type{Lower})
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38 @boundscheck if length(v) < closuresize(op)
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39 throw(BoundsError())
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40 end
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41 apply_stencil(op.eClosure,v,1)
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42 end
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43
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44 function apply_boundary_value_transpose(op::ConstantStencilOperator, v::AbstractVector, ::Type{Upper})
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45 @boundscheck if length(v) < closuresize(op)
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46 throw(BoundsError())
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47 end
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48 apply_stencil_backwards(op.eClosure,v,length(v))
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49 end
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50 export apply_boundary_value_transpose
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51
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52 function apply_boundary_value(op::ConstantStencilOperator, v::Number, i::Index, N::Integer, ::Type{Lower})
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53 @boundscheck if !(0<length(Int(i)) <= N)
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54 throw(BoundsError())
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55 end
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56 op.eClosure[Int(i)-1]*v
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57 end
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58
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59 function apply_boundary_value(op::ConstantStencilOperator, v::Number, i::Index, N::Integer, ::Type{Upper})
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60 @boundscheck if !(0<length(Int(i)) <= N)
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61 throw(BoundsError())
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62 end
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63 op.eClosure[N-Int(i)]*v
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64 end
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65 export apply_boundary_value
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66
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67
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68 """
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69 BoundaryValue{T,N,M,K} <: TensorMapping{T,2,1}
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70
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71 Implements the boundary operator `e` as a TensorMapping
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72 """
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73 struct BoundaryValue{D,T,M,R} <: TensorMapping{T,D,1}
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74 e:BoundaryOperator{T,M,R}
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75 bId::CartesianBoundary
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76 end
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77
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78 function LazyTensors.apply_transpose(bv::BoundaryValue{T,M,Lower}, v::AbstractVector{T}, i::Index) where T
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79 u = selectdim(v,3-dim(bv.bId),Int(I[1]))
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80 return apply_transpose(bv.e, u, I)
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81 end
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82
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83
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84 """
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85 BoundaryOperator{T,N,R} <: TensorMapping{T,1,1}
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86
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87 Implements the boundary operator `e` as a TensorMapping
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88 """
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89 export BoundaryOperator
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90 struct BoundaryOperator{T,M,R<:Region} <: TensorMapping{T,1,1}
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91 closure::Stencil{T,M}
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92 end
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93
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94 function LazyTensors.range_size(e::BoundaryOperator, domain_size::NTuple{1,Integer})
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95 return UnknownDim
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96 end
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97
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98 LazyTensors.domain_size(e::BoundaryOperator{T}, range_size::NTuple{1,Integer}) where T = range_size
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99
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100 function LazyTensors.apply_transpose(e::BoundaryOperator{T,M,Lower}, v::AbstractVector{T}, i::Index{Lower}) where T
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101 @boundscheck if length(v) < closuresize(e) #TODO: Use domain_size here?
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102 throw(BoundsError())
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103 end
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104 apply_stencil(e.closure,v,Int(i))
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105 end
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106
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107 function LazyTensors.apply_transpose(e::BoundaryOperator{T,M,Upper}}, v::AbstractVector{T}, i::Index{Upper}) where T
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108 @boundscheck if length(v) < closuresize(e) #TODO: Use domain_size here?
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109 throw(BoundsError())
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110 end
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111 apply_stencil_backwards(e.closure,v,Int(i))
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112 end
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113
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114 function LazyTensors.apply_transpose(e::BoundaryOperator{T}, v::AbstractVector{T}, i::Index) where T
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Vidar Stiernström <vidar.stiernstrom@it.uu.se>
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115 @boundscheck if length(v) < closuresize(e) #TODO: Use domain_size here?
f8a4850caed2 Move BoundaryValue from Laplace to separate file. Currently WIP
Vidar Stiernström <vidar.stiernstrom@it.uu.se>
parents:
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116 throw(BoundsError())
f8a4850caed2 Move BoundaryValue from Laplace to separate file. Currently WIP
Vidar Stiernström <vidar.stiernstrom@it.uu.se>
parents:
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117 end
f8a4850caed2 Move BoundaryValue from Laplace to separate file. Currently WIP
Vidar Stiernström <vidar.stiernstrom@it.uu.se>
parents:
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118 return eltype(v)(0)
f8a4850caed2 Move BoundaryValue from Laplace to separate file. Currently WIP
Vidar Stiernström <vidar.stiernstrom@it.uu.se>
parents:
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119 end
f8a4850caed2 Move BoundaryValue from Laplace to separate file. Currently WIP
Vidar Stiernström <vidar.stiernstrom@it.uu.se>
parents:
diff changeset
120
f8a4850caed2 Move BoundaryValue from Laplace to separate file. Currently WIP
Vidar Stiernström <vidar.stiernstrom@it.uu.se>
parents:
diff changeset
121 #TODO: Implement apply in a meaningful way. Should it return a vector or a single value (perferable?) Should fit into the
f8a4850caed2 Move BoundaryValue from Laplace to separate file. Currently WIP
Vidar Stiernström <vidar.stiernstrom@it.uu.se>
parents:
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122 function LazyTensors.apply(e::BoundaryOperator, v::AbstractVector, i::Index)
f8a4850caed2 Move BoundaryValue from Laplace to separate file. Currently WIP
Vidar Stiernström <vidar.stiernstrom@it.uu.se>
parents:
diff changeset
123 @boundscheck if !(0<length(Int(i)) <= length(v))
f8a4850caed2 Move BoundaryValue from Laplace to separate file. Currently WIP
Vidar Stiernström <vidar.stiernstrom@it.uu.se>
parents:
diff changeset
124 throw(BoundsError())
f8a4850caed2 Move BoundaryValue from Laplace to separate file. Currently WIP
Vidar Stiernström <vidar.stiernstrom@it.uu.se>
parents:
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125 end
f8a4850caed2 Move BoundaryValue from Laplace to separate file. Currently WIP
Vidar Stiernström <vidar.stiernstrom@it.uu.se>
parents:
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126 return e.closure[Int(i)].*v
f8a4850caed2 Move BoundaryValue from Laplace to separate file. Currently WIP
Vidar Stiernström <vidar.stiernstrom@it.uu.se>
parents:
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127 end