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|---|---|---|---|
| 1 | #include "ovchinnikov_m_multidim_integrals_rectangle/seq/include/ops_seq.hpp" | ||
| 2 | |||
| 3 | #include <cmath> | ||
| 4 | #include <cstddef> | ||
| 5 | #include <vector> | ||
| 6 | |||
| 7 | #include "ovchinnikov_m_multidim_integrals_rectangle/common/include/common.hpp" | ||
| 8 | |||
| 9 | namespace ovchinnikov_m_multidim_integrals_rectangle { | ||
| 10 | |||
| 11 | namespace { | ||
| 12 | double MultivariableFunction(const std::vector<double> &point) { | ||
| 13 | double sum = 0.0; | ||
| 14 |
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2041624 | for (double coord : point) { |
| 15 | 1563576 | sum += coord * coord; | |
| 16 | } | ||
| 17 | return sum; | ||
| 18 | } | ||
| 19 | } // namespace | ||
| 20 | |||
| 21 |
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216 | OvchinnikovMMultiDimIntegralsRectangleSEQ::OvchinnikovMMultiDimIntegralsRectangleSEQ(const InType &in) { |
| 22 | SetTypeOfTask(GetStaticTypeOfTask()); | ||
| 23 | GetInput() = in; | ||
| 24 | 216 | GetOutput() = 0.0; | |
| 25 | 216 | } | |
| 26 | |||
| 27 | 216 | bool OvchinnikovMMultiDimIntegralsRectangleSEQ::ValidationImpl() { | |
| 28 | const auto &input = GetInput(); | ||
| 29 | |||
| 30 |
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216 | if (std::get<0>(input) <= 0) { |
| 31 | return false; | ||
| 32 | } | ||
| 33 |
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216 | if (std::get<1>(input) <= 0) { |
| 34 | return false; | ||
| 35 | } | ||
| 36 | |||
| 37 | const auto &lower_bounds = std::get<2>(input); | ||
| 38 | const auto &upper_bounds = std::get<3>(input); | ||
| 39 | int dim = std::get<1>(input); | ||
| 40 | |||
| 41 |
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216 | if (lower_bounds.size() != static_cast<size_t>(dim)) { |
| 42 | return false; | ||
| 43 | } | ||
| 44 |
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216 | if (upper_bounds.size() != static_cast<size_t>(dim)) { |
| 45 | return false; | ||
| 46 | } | ||
| 47 | |||
| 48 |
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760 | for (int i = 0; i < dim; i++) { |
| 49 |
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544 | if (lower_bounds[i] >= upper_bounds[i]) { |
| 50 | return false; | ||
| 51 | } | ||
| 52 | } | ||
| 53 | return true; | ||
| 54 | } | ||
| 55 | |||
| 56 | 216 | bool OvchinnikovMMultiDimIntegralsRectangleSEQ::PreProcessingImpl() { | |
| 57 | 216 | return true; | |
| 58 | } | ||
| 59 | |||
| 60 | 216 | bool OvchinnikovMMultiDimIntegralsRectangleSEQ::RunImpl() { | |
| 61 | const auto &input = GetInput(); | ||
| 62 | 216 | int n = std::get<0>(input); | |
| 63 | 216 | int dim = std::get<1>(input); | |
| 64 | const auto &lower_bounds = std::get<2>(input); | ||
| 65 | const auto &upper_bounds = std::get<3>(input); | ||
| 66 | |||
| 67 | 216 | std::vector<std::vector<double>> axis_coords(dim); | |
| 68 | double cell_volume = 1.0; | ||
| 69 | |||
| 70 |
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760 | for (int curr_dim = 0; curr_dim < dim; curr_dim++) { |
| 71 |
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544 | double step = (upper_bounds[curr_dim] - lower_bounds[curr_dim]) / n; |
| 72 |
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544 | cell_volume *= step; |
| 73 | |||
| 74 |
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544 | axis_coords[curr_dim].resize(n); |
| 75 |
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7544 | for (int i = 0; i < n; i++) { |
| 76 | 7000 | axis_coords[curr_dim][i] = lower_bounds[curr_dim] + ((i + 0.5) * step); | |
| 77 | } | ||
| 78 | } | ||
| 79 | |||
| 80 | double integral = 0.0; | ||
| 81 |
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216 | std::vector<double> point(dim); |
| 82 |
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216 | std::vector<int> indices(dim, 0); |
| 83 | |||
| 84 | bool done = false; | ||
| 85 | 216 | while (!done) { | |
| 86 |
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2041624 | for (int curr_dim = 0; curr_dim < dim; curr_dim++) { |
| 87 | 1563576 | point[curr_dim] = axis_coords[curr_dim][indices[curr_dim]]; | |
| 88 | } | ||
| 89 | |||
| 90 | 478048 | integral += MultivariableFunction(point); | |
| 91 | |||
| 92 | 478048 | int d = dim - 1; | |
| 93 |
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517504 | while (d >= 0) { |
| 94 |
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517288 | indices[d]++; |
| 95 |
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517288 | if (indices[d] < n) { |
| 96 | break; | ||
| 97 | } | ||
| 98 | 39456 | indices[d] = 0; | |
| 99 | 39456 | d--; | |
| 100 | } | ||
| 101 | |||
| 102 |
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478048 | if (d < 0) { |
| 103 | done = true; | ||
| 104 | } | ||
| 105 | } | ||
| 106 | |||
| 107 | 216 | integral *= cell_volume; | |
| 108 |
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216 | GetOutput() = integral; |
| 109 | 216 | return true; | |
| 110 | 216 | } | |
| 111 | |||
| 112 | 216 | bool OvchinnikovMMultiDimIntegralsRectangleSEQ::PostProcessingImpl() { | |
| 113 | 216 | return true; | |
| 114 | } | ||
| 115 | |||
| 116 | } // namespace ovchinnikov_m_multidim_integrals_rectangle | ||
| 117 |