C++ 代码优化：删除欧几里得距离大于 0.3 的点对

std::vector<std::vector> distances(cloud->size(), std::vector(cloud->size())); for (size_t i = 0; i < cloud->size(); ++i) { for (size_t j = 0; j < cloud->size(); ++j) { distances[i][j] = euclideanDistance((*cloud)[i], (*cloud)[j]); if (distances[i][j] > 0.3) { distances[i][j] = 0; } } }