【发布时间】：2017-09-06 21:35:21
【问题描述】：
我的 SFML 游戏出现了严重问题。 我整天都在努力寻找解决方案，尝试了不同的事情，但到目前为止对我没有任何帮助。 这些是我的 .h 文件： Bullet.h
#pragma once
#include <SFML\Graphics.hpp>
#include <iostream>
#include <vector>
class Bullet
{
friend class Player;
friend class Game;
float width;
float height;
float x;
float y;
std::vector<Bullet*> projectiles;
sf::RectangleShape bullet;
void draw_projectiles(sf::RenderWindow &window);
void make_projectiles();
public:
void check();
Bullet();
~Bullet();
};
Game.h
#pragma once
#include <SFML\Graphics.hpp>
#include "Player.h"
#include "Bullet.h"
#include <vector>
//#include "Enemy.h"
class Game
{
friend class Player;
sf::RenderWindow* window;
sf::Event* evnt;
Player* player;
Bullet* bullet;
public:
void Loop();
void game_func();
Game();
~Game();
};
Player.h
#pragma once
#include <SFML\Graphics.hpp>
#include <iostream>
#include "Game.h"
#include "Bullet.h"
class Player
{
sf::RectangleShape player;
Bullet* bullet;
int ammo;
float width;
float height;
int x;
int y;
float vel;
public:
void draw(sf::RenderWindow &window);
void move(sf::Event &evnt, sf::RenderWindow &window);
Player();
~Player();
};
cpp 文件来了 Bullet.cpp
#include "Bullet.h"
void Bullet::check()
{
x = bullet.getPosition().x;
y = bullet.getPosition().y;
}
void Bullet::draw_projectiles(sf::RenderWindow &window)
{
for (int i = 0; i < 10; i++)
{
window.draw(projectiles[i]->bullet);
}
}
void Bullet::make_projectiles()
{
projectiles.push_back(new Bullet());
}
Bullet::Bullet()
{
std::cout << "zostal utworzony nowy obiekt" << std::endl;
width = 50;
height = 50;
bullet = sf::RectangleShape(sf::Vector2f(width, height));
bullet.setFillColor(sf::Color::Yellow);
bullet.setPosition(0, 0);
x = bullet.getPosition().x;
y = bullet.getPosition().y;
}
Bullet::~Bullet(){}
Game.cpp
#include "Game.h"
Game::Game()
{
window= new sf::RenderWindow(sf::VideoMode(1280, 720), "SFML Game",
sf::Style::Close);
player = new Player();
}
Game::~Game(){}
void Game::Loop()
{
while (window->isOpen())
{
sf::Event evnt;
while (window->pollEvent(evnt))
{
//events
if (evnt.type==sf::Event::Closed)
window->close();
player->move(evnt, *window);
window->clear();
player->draw(*window);
window->display();
bullet->draw_projectiles(*window);
}
}
}
void Game::game_func()
{
Game::Loop();
}
Player.cpp
#include "Player.h"
void Player::draw(sf::RenderWindow &window)
{
window.draw(player);
}
void Player::move(sf::Event &evnt, sf::RenderWindow &window)
{
x = player.getPosition().x;
y = player.getPosition().y;
float width = window.getSize().x;
float height = window.getSize().y;
Bullet obj;
if (evnt.type == sf::Event::KeyPressed)
{
//movement
if (evnt.key.code == sf::Keyboard::Key::W)
{
if (y <= 0)
{
return;
}
player.move(0, -1 * vel);
}
if (evnt.key.code == sf::Keyboard::Key::S)
{
if (y >= height - Player::height)
{
return;
}
player.move(0, 1 * vel);
}
if (evnt.key.code == sf::Keyboard::Key::A)
{
if (x <= 0)
{
return;
}
player.move(-1 * vel, 0);
}
if (evnt.key.code == sf::Keyboard::D)
{
if(x>width-Player::width)
{
return;
}
player.move(1 * vel, 0);
}
if (evnt.key.code == sf::Keyboard::Space)
{
obj.make_projectiles();
}
}
}
Player::Player()
{
width = 100;
height = 100;
vel = 10;
player = sf::RectangleShape(sf::Vector2f(width, height));
player.setFillColor(sf::Color::Red);
player.setPosition(sf::Vector2f(15, 20));
}
Player::~Player(){}
还有 main.cpp
#include <SFML/Graphics.hpp>
#include <iostream>
#include <cstdlib>
#include <ctime>
#include <vector>
#include "Game.h"
int main()
{
Game gme;
gme.game_func();
return 0;
}
我尝试了许多不同的方法，但无法弄清楚为什么它不起作用。我在 Visual Studio 15 上运行。 所以这是我得到的错误：
Exception thrown: read access violation.
std::_Vector_alloc<std::_Vec_base_types<Bullet *,std::allocator<Bullet *> >
>::_Mylast(...) returned 0x18.
我知道代码并不完美而且有点混乱，但我只是一个初学者并试图学习新东西。 我将不胜感激！
【问题讨论】：
-
你违反了 3/5/0 的规则。您正在泄漏内存。使用 std::unique_ptr 而不是原始指针来拥有指针。
-
我假设您在 IDE 中使用缩进。从 IDE 粘贴代码后，选择您的代码并使用编辑器中的 {} 选项。它应该保持缩进。
-
离题：你有一个循环依赖 player.h 包括 qame.h 和 game.h 包括 player.h。这迟早会咬你。更多阅读：stackoverflow.com/questions/625799/…
-
写一些小而简单的完美运行的东西，然后每次增加一点复杂性，在每一步都进行测试，并且永远不要添加不起作用的代码。这样您就离工作版本只有一步之遥，而且很容易隔离新的错误。