为什么我的游戏中的精灵没有显示？

Question

您好我正在使用SFML库制作游戏，但我在尝试显示＆＃34;敌人＆＃34;

这是代码：

enemy.h：

#ifndef ENEMY_H
#define ENEMY_H

#include<SFML/Graphics.hpp>

class Enemy {
private:
 sf::Texture texture;
 sf::Sprite enemySprite;

 float enemySpeed;
 int maxY, maxX;
public:
 Enemy(int _maxY, int _maxX);
 void render(sf::RenderWindow *wnd);
 void update(sf::Time deltaTime);
 void reset(float speed);
};

#endif

enemy.cpp：

#include <ctime>

Enemy::Enemy(int _maxY, int _maxX) {
texture.loadFromFile("SFML-Game-Development-Book-
master/03_World/Media/Textures/Raptor.png");
enemySprite.setTexture(texture);
enemySprite.rotate(180);

maxY = _maxY;
maxX = _maxX;
}

void Enemy::render(sf::RenderWindow *wnd){
wnd->draw(enemySprite);
}

void Enemy::reset(float speed){
srand(time(NULL));
int num = rand();

enemySpeed = speed;

enemySprite.setPosition(num%maxX, maxY);
}

void Enemy::update(sf::Time deltaTime){
enemySprite.move(0.0f, enemySpeed * deltaTime.asSeconds());

if (enemySprite.getPosition().y > 600){
reset(enemySpeed);
}
}

Game.h：

  class Game {
private:
 sf::RenderWindow *mWindow;
 Aircraft aircraft;
 std::vector<Enemy> enemies;

 void reset();
 private:
 void proccesEvent();
 void update(sf::Time deltaTime);
 void render();
 public:
 Game();
 void run();
 };

Game.cpp：

Game::Game(){
mWindow = new sf::RenderWindow(sf::VideoMode(800,600), "ventana SFML"); 

for (int i=0; i<5; i++){
   enemies.push_back(Enemy(800, 600));
}
}

void Game::proccesEvent(){
sf::Event event;

while(mWindow->pollEvent(event)){
 if(event.type == sf::Event::Closed){
    mWindow->close();
  }
 }
}

void Game::reset(){
 for (int i=0; i<enemies.size(); i++){
   enemies[i].reset(100.0f);
 }
}

void Game::update(sf::Time deltaTime){
if (sf::Keyboard::isKeyPressed(sf::Keyboard::W)){
aircraft.Up();
}
if (sf::Keyboard::isKeyPressed(sf::Keyboard::S)){
aircraft.Down();
}
if (sf::Keyboard::isKeyPressed(sf::Keyboard::A)){
aircraft.Left();
}
if (sf::Keyboard::isKeyPressed(sf::Keyboard::D)){
aircraft.Right();
}

aircraft.update(deltaTime); 

for (int i=0; i<enemies.size(); i++){
enemies[i].update(deltaTime);
}
}

void Game::render(){
mWindow->clear();
aircraft.Render(mWindow);
for (int i=0; i<enemies.size(); i++){
enemies[i].render(mWindow);
}
mWindow->display();
}

void Game::run(){
sf::Clock clock;
while(mWindow->isOpen()){
sf::Time deltaTime = clock.restart();

proccesEvent();
reset();
update(deltaTime);
render();
}
}

问题在于＆＃34;敌人＆＃34;不会出现在屏幕上。纹理正确加载，如果我从类游戏中运行的函数中删除函数重置，则会出现一个白色方块而不是纹理，当时还有一个，所以如何纠正这个，以便同时显示多个敌人。