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annotate diffOp.jl @ 56:27a8d3021a1c cell_based_test

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Convert apply functions to cell-based
author Ylva Rydin <ylva.rydin@telia.com>
date Tue, 15 Jan 2019 12:26:06 +0100
parents c62ea0112d4d
children 178a203f3e6d
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1 abstract type DiffOp end
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3 function apply(D::DiffOp, v::AbstractVector, i::Int)
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4 error("not implemented")
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5 end
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6
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7 function innerProduct(D::DiffOp, u::AbstractVector, v::AbstractVector)::Real
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8 error("not implemented")
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9 end
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10
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11 function matrixRepresentation(D::DiffOp)
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12 error("not implemented")
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13 end
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15 function boundaryCondition(D::DiffOp,b::Grid.BoundaryId,type)::(Closure, Penalty)
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16 error("not implemented")
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17 end
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19 function interface(Du::DiffOp, Dv::DiffOp, b::Grid.BoundaryId; type)
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20 error("not implemented")
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21 end
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22
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23 abstract type Closure end
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24
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25 function apply(c::Closure, v::AbstractVector, i::Int)
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26 error("not implemented")
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27 end
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28
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29 abstract type Penalty end
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30
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31 function apply(c::Penalty, g, i::Int)
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32 error("not implemented")
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33 end
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35 # DiffOp must have a grid!!!
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36 function apply!(D::DiffOp, u::AbstractVector, v::AbstractVector)
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37 for i ∈ 1:Grid.numberOfPoints(D.grid)
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38 u[i] = apply(D, v, i)
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39 end
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40
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41 return nothing
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42 end
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43
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44 function apply(D::DiffOp, v::AbstractVector)::AbstractVector
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45 u = zeros(eltype(v), size(v))
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46 apply!(D,v,u)
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47 return u
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48 end
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49
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50 # Differential operator for a*d^2/dx^2
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51 struct Laplace1D <: DiffOp
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52 grid
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53 a
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54 op
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55 end
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57 # u = L*v
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58 function apply(L::Laplace1D, v::AbstractVector, i::Int)
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59 h = Grid.spacings(L.grid)[1]
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60 uᵢ = L.a * apply(L.op, h, v, i)
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61 return uᵢ
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62 end
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63
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65 # Differential operator for a*d^2/dx^2 + a*d^2/dy^2
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66 struct Laplace2D <: DiffOp
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67 grid
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68 a
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69 op
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70 end
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71
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72 # u = L*v
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73 function apply(L::Laplace2D, v::AbstractVector, i::Int)
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74 h = Grid.spacings(L.grid)
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76 li = LinearIndices(L.grid.numberOfPointsPerDim)
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77 ci = CartesianIndices(L.grid.numberOfPointsPerDim)
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78 I = ci[i]
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79
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80 # 2nd x-derivative
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81 uᵢ = apply(L.op, h[1], view(v, li[:,I[2]]), I[1])
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82 # 2nd y-derivative
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83 uᵢ += apply(L.op, h[2], view(v, li[I[1],:]), I[2])
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84
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85 return uᵢ
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86 end