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|---|---|---|---|
| 1 | #include "nazyrov_a_multidim_integral_rectangle/seq/include/ops_seq.hpp" | ||
| 2 | |||
| 3 | #include <algorithm> | ||
| 4 | #include <cmath> | ||
| 5 | #include <cstddef> | ||
| 6 | #include <cstdint> | ||
| 7 | #include <vector> | ||
| 8 | |||
| 9 | #include "nazyrov_a_multidim_integral_rectangle/common/include/common.hpp" | ||
| 10 | |||
| 11 | namespace nazyrov_a_multidim_integral_rectangle { | ||
| 12 | |||
| 13 |
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80 | NazyrovAMultidimIntegralRectangleSeq::NazyrovAMultidimIntegralRectangleSeq(const InType &in) { |
| 14 | SetTypeOfTask(GetStaticTypeOfTask()); | ||
| 15 | GetInput() = in; | ||
| 16 | 80 | GetOutput() = 0.0; | |
| 17 | 80 | } | |
| 18 | |||
| 19 | 80 | bool NazyrovAMultidimIntegralRectangleSeq::ValidationImpl() { | |
| 20 | const auto &func = std::get<0>(GetInput()); | ||
| 21 | const auto &bounds = std::get<1>(GetInput()); | ||
| 22 |
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80 | const int n = std::get<2>(GetInput()); |
| 23 |
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80 | return func && n > 0 && !bounds.empty() && std::ranges::all_of(bounds, [](const auto &bd) { |
| 24 |
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168 | return std::isfinite(bd.first) && std::isfinite(bd.second) && bd.first < bd.second; |
| 25 | 80 | }); | |
| 26 | } | ||
| 27 | |||
| 28 | 80 | bool NazyrovAMultidimIntegralRectangleSeq::PreProcessingImpl() { | |
| 29 | 80 | return true; | |
| 30 | } | ||
| 31 | |||
| 32 | 80 | bool NazyrovAMultidimIntegralRectangleSeq::RunImpl() { | |
| 33 | const auto &func = std::get<0>(GetInput()); | ||
| 34 | const auto &bounds = std::get<1>(GetInput()); | ||
| 35 | 80 | const int n = std::get<2>(GetInput()); | |
| 36 | |||
| 37 | 80 | const int dim = static_cast<int>(bounds.size()); | |
| 38 | |||
| 39 | 80 | std::vector<double> h(static_cast<std::size_t>(dim)); | |
| 40 | double cell_vol = 1.0; | ||
| 41 |
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248 | for (int i = 0; i < dim; ++i) { |
| 42 | 168 | h[i] = (bounds[i].second - bounds[i].first) / n; | |
| 43 | 168 | cell_vol *= h[i]; | |
| 44 | } | ||
| 45 | |||
| 46 | std::int64_t total = 1; | ||
| 47 |
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248 | for (int i = 0; i < dim; ++i) { |
| 48 | 168 | total *= n; | |
| 49 | } | ||
| 50 | |||
| 51 | double sum = 0.0; | ||
| 52 |
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80 | std::vector<double> point(static_cast<std::size_t>(dim)); |
| 53 | |||
| 54 |
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11483280 | for (std::int64_t cell = 0; cell < total; ++cell) { |
| 55 | std::int64_t tmp = cell; | ||
| 56 |
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45446400 | for (int i = dim - 1; i >= 0; --i) { |
| 57 | 33963200 | const int ki = static_cast<int>(tmp % n); | |
| 58 | 33963200 | tmp /= n; | |
| 59 | 33963200 | const double coordinate = bounds[i].first + ((ki + 0.5) * h[i]); | |
| 60 | 33963200 | point[i] = coordinate; | |
| 61 | } | ||
| 62 | 11483200 | sum += func(point); | |
| 63 | } | ||
| 64 | |||
| 65 |
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80 | GetOutput() = sum * cell_vol; |
| 66 | 80 | return true; | |
| 67 | } | ||
| 68 | |||
| 69 | 80 | bool NazyrovAMultidimIntegralRectangleSeq::PostProcessingImpl() { | |
| 70 | 80 | return true; | |
| 71 | } | ||
| 72 | |||
| 73 | } // namespace nazyrov_a_multidim_integral_rectangle | ||
| 74 |