Open3D (C++ API)  0.12.0
ReduceSubarraysSum.h
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26 
27 #pragma once
28 
29 #include <tbb/parallel_for.h>
30 
31 namespace open3d {
32 namespace ml {
33 namespace impl {
34 
47 template <class T>
48 void ReduceSubarraysSumCPU(const T* const values,
49  const size_t values_size,
50  const int64_t* const row_splits,
51  const size_t num_arrays,
52  T* out_sums) {
53  tbb::parallel_for(tbb::blocked_range<size_t>(0, num_arrays),
54  [&](const tbb::blocked_range<size_t>& r) {
55  for (size_t i = r.begin(); i != r.end(); ++i) {
56  size_t begin_idx = row_splits[i];
57  size_t end_idx = row_splits[i + 1];
58 
59  T sum = T(0);
60  for (size_t j = begin_idx; j < end_idx; ++j) {
61  sum += values[j];
62  }
63  out_sums[i] = sum;
64  }
65  });
66 }
67 
68 } // namespace impl
69 } // namespace ml
70 } // namespace open3d
void ReduceSubarraysSumCPU(const T *const values, const size_t values_size, const int64_t *const row_splits, const size_t num_arrays, T *out_sums)
Definition: ReduceSubarraysSum.h:48
Definition: PinholeCameraIntrinsic.cpp:35