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comparison src/Grids/grid.jl @ 1476:62f9d0387a2a feature/grids/componentview

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Introduce a view type and implement sliced indexing for the components.
author Jonatan Werpers <jonatan@werpers.com>
date Fri, 01 Dec 2023 14:58:05 +0100
parents 76b190ca9a27
children 06dec7b68f82 553111a15506
comparison
equal deleted inserted replaced
1475:76b190ca9a27 1476:62f9d0387a2a
38 The type of the components of `gf`. 38 The type of the components of `gf`.
39 """ 39 """
40 component_type(T::Type) = eltype(eltype(T)) 40 component_type(T::Type) = eltype(eltype(T))
41 component_type(t) = component_type(typeof(t)) 41 component_type(t) = component_type(typeof(t))
42 42
43 function componentview(gf, component_index...) 43 componentview(gf, component_index...) = ArrayComponentView(gf, component_index)
44 A = reinterpret(reshape, component_type(gf), gf)
45 44
46 component_linear_index = LinearIndices(first(gf))[component_index...] 45 struct ArrayComponentView{CT,T,D,AT <: AbstractArray{T,D}, IT} <: AbstractArray{CT,D}
47 return @view A[component_linear_index,:,:] 46 v::AT
47 component_index::IT
48
49 function ArrayComponentView(v, component_index)
50 CT = typeof(first(v)[component_index...])
51 return new{CT, eltype(v), ndims(v), typeof(v), typeof(component_index)}(v,component_index)
52 end
48 end 53 end
54
55 Base.size(cv) = size(cv.v)
56 Base.getindex(cv::ArrayComponentView, i::Int) = cv.v[i][cv.component_index...]
57 Base.getindex(cv::ArrayComponentView, I::Vararg{Int}) = cv.v[I...][cv.component_index...]
58 IndexStyle(::Type{<:ArrayComponentView{<:Any,<:Any,AT}}) where AT = IndexStyle(AT)
59
60 # TODO: Implement the remaining optional methods from the array interface
61 # setindex!(A, v, i::Int)
62 # setindex!(A, v, I::Vararg{Int, N})
63 # iterate
64 # length(A)
65 # similar(A)
66 # similar(A, ::Type{S})
67 # similar(A, dims::Dims)
68 # similar(A, ::Type{S}, dims::Dims)
69 # # Non-traditional indices
70 # axes(A)
71 # similar(A, ::Type{S}, inds)
72 # similar(T::Union{Type,Function}, inds)
73
74 # TODO: Implement a more general ComponentView that can handle non-AbstractArrays.
49 75
50 """ 76 """
51 refine(g::Grid, r) 77 refine(g::Grid, r)
52 78
53 The grid where `g` is refined by the factor `r`. 79 The grid where `g` is refined by the factor `r`.