我一直在尝试更新游戏中的敌人精灵，方法是创建一个指向敌人对象的指针向量，然后使用更新函数对属于这些对象的精灵进行动画处理。虽然敌人的精灵显示在屏幕上，但它们不会更新，所以它们看起来就像被冻结了一样。

以下是我编写代码的方式：

#include<iostream>
#include<SFML/Graphics.hpp>
#include<math.h>
#include<vector>
#include<cstdlib>
#include "Enemy.h"

sf::RenderWindow window(sf::VideoMode(1920, 1080), "Zombie game", sf::Style::Default);
std::vector<Enemy*>enemies;
int main()
{
window.setFramerateLimit(60);
sf::Clock clock;
Enemy *enemy = new Enemy();
enemy->init("Assets/graphics/zombieSpriteSheetWalk.png", 4, 1.0f, sf::Vector2f(200.0f, 200.0f), sf::Vector2i(100, 107));
enemies.push_back(enemy);
while (window.isOpen())
{
sf::Event event;
while (window.pollEvent(event))
{
if (event.type == sf::Event::Closed || event.key.code == sf::Keyboard::Escape) window.close();
}
sf::Time dt = clock.restart();
for (int i = 0; i < enemies.size(); i++)
{
Enemy *enemy = enemies[i];
enemy->update(dt.asSeconds());
}
window.clear();
for (Enemy* enemy : enemies) window.draw(enemy->getSprite());
window.display();
}
return 0;
}

敌人.h文件：

#pragma once
#include<SFML/Graphics.hpp>
#include <iostream>
class Enemy
{
public:
Enemy();
~Enemy();
void init(std::string textureName, int frameCount, float animDuration, sf::Vector2f position, sf::Vector2i spriteSize);
void update(float dt);
sf::Sprite& getSprite();
void test();
private:
sf::Texture m_texture;
sf::Sprite m_sprite;
sf::Vector2f m_position;
int m_frameCount; //no. of frames in animation
float m_animDuration; //How long animation lasts (speed)
float m_elapsedTime; //keeps track of how long game has been running
sf::Vector2i m_spriteSize; //Size of each frame
};

敌人.cpp文件：

#include "Enemy.h"
Enemy::Enemy()
{
}

Enemy::~Enemy()
{
}
void Enemy::init(std::string textureName, int frameCount, float animDuration, sf::Vector2f position, sf::Vector2i spriteSize)
{
m_position = position;
m_frameCount = frameCount;
m_animDuration = animDuration;
m_spriteSize = spriteSize;
m_texture.loadFromFile(textureName.c_str()); 
m_sprite.setTexture(m_texture);
m_sprite.setTextureRect(sf::IntRect(0, 0, m_spriteSize.x, m_spriteSize.y));//sets which part of sprite sheet we want to display
m_sprite.setPosition(m_position);
m_sprite.setOrigin((m_texture.getSize().x / frameCount) - 25.0f, m_texture.getSize().y / 2);
}
void Enemy::update(float dt)
{
m_elapsedTime += dt;
int animFrame = static_cast<int>((m_elapsedTime / m_animDuration) * m_frameCount) % m_frameCount; //calculates current animation frame number. static_class converts float to int
m_sprite.setTextureRect(sf::IntRect(animFrame * m_spriteSize.x, 0, m_spriteSize.x, m_spriteSize.y)); //updates part of sprite sheet to be displayed
}

sf::Sprite& Enemy::getSprite()
{
return m_sprite;
}