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pcdet/ops/pointnet2/pointnet2_batch/src/interpolate.cpp

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+/*
+batch version of point interpolation, modified from the original implementation of official PointNet++ codes.
+Written by Shaoshuai Shi
+All Rights Reserved 2018.
+*/
+
+
+#include <torch/serialize/tensor.h>
+#include <vector>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <cuda.h>
+#include <cuda_runtime_api.h>
+#include "interpolate_gpu.h"
+
+
+void three_nn_wrapper_fast(int b, int n, int m, at::Tensor unknown_tensor, 
+    at::Tensor known_tensor, at::Tensor dist2_tensor, at::Tensor idx_tensor) {
+    const float *unknown = unknown_tensor.data<float>();
+    const float *known = known_tensor.data<float>();
+    float *dist2 = dist2_tensor.data<float>();
+    int *idx = idx_tensor.data<int>();
+
+    three_nn_kernel_launcher_fast(b, n, m, unknown, known, dist2, idx);
+}
+
+
+void three_interpolate_wrapper_fast(int b, int c, int m, int n,
+                         at::Tensor points_tensor,
+                         at::Tensor idx_tensor,
+                         at::Tensor weight_tensor,
+                         at::Tensor out_tensor) {
+
+    const float *points = points_tensor.data<float>();
+    const float *weight = weight_tensor.data<float>();
+    float *out = out_tensor.data<float>();
+    const int *idx = idx_tensor.data<int>();
+
+    three_interpolate_kernel_launcher_fast(b, c, m, n, points, idx, weight, out);
+}
+
+
+void three_interpolate_grad_wrapper_fast(int b, int c, int n, int m,
+                            at::Tensor grad_out_tensor,
+                            at::Tensor idx_tensor,
+                            at::Tensor weight_tensor,
+                            at::Tensor grad_points_tensor) {
+
+    const float *grad_out = grad_out_tensor.data<float>();
+    const float *weight = weight_tensor.data<float>();
+    float *grad_points = grad_points_tensor.data<float>();
+    const int *idx = idx_tensor.data<int>();
+
+    three_interpolate_grad_kernel_launcher_fast(b, c, n, m, grad_out, idx, weight, grad_points);
+}