WangZixuan

import torch


def chamfer_distance_without_batch(p1, p2, debug=False):

    '''
    Calculate Chamfer Distance between two point sets
    :param p1: size[1, N, D]
    :param p2: size[1, M, D]
    :param debug: whether need to output debug info

WangZixuan

#include <string>
#include <stack>
#include <iostream>
using namespace std;

bool isOperand(char x)
{
	return (x >= 'a' && x <= 'z') ||
		(x >= 'A' && x <= 'Z');
}