我正在尝试初始化我的游戏窗口,但卡在了这个错误上。我已经尝试过:
- 仔细检查所有代码是否存在语法错误
- 确认SDL2库已正确包含在我的项目中
请参考下面的代码:
头文件:
#ifndef Game_hpp
#define Game_hpp
#include "SDL.h"
#include <iostream>
class Game
{
public:
Game();
~Game();
void init(const char* title, int xpos, int ypos, int width, int height, bool fullscreen);
void handleEvents();
void update();
void render();
void clean();
bool running()
{
return isRunning;
}
private:
bool isRunning;
SDL_Window *window;
SDL_Renderer *renderer;
};
#endif /* Game_hpp */
Game.cpp - 函数定义所在的地方
#include "Game.h"
Game::Game()
{}
Game::~Game()
{}
void Game::init(const char *title, int xpos, int ypos, int width, int height, bool fullscreen)
{
int flags = 0;
if (fullscreen)
{
flags = SDL_WINDOW_FULLSCREEN;
}
if (SDL_Init(SDL_INIT_EVERYTHING) == 0)
{
std::cout << "Subsystems Initialised..." << std::endl;
window = SDL_CreateWindow(title, xpos, ypos, width, height, flags);
if (window)
{
std::cout << "Window Created" << std::endl;
}
renderer = SDL_CreateRenderer(window, -1, 0);
if (renderer)
{
SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
std::cout << "Renderer Created" << std::endl;
}
isRunning = true;
}
else
{
isRunning = false;
}
}
void Game::handleEvents()
{
SDL_Event event;
SDL_PollEvent(&event);
switch (event.type)
{
case SDL_QUIT:
isRunning = false;
break;
default:
break;
}
}
void Game::update()
{}
void Game::render()
{
SDL_RenderClear(renderer);
//this is where we add stuff to render
SDL_RenderPresent(renderer);
}
void Game::clean()
{
SDL_DestroyWindow(window);
SDL_DestroyRenderer(renderer);
SDL_Quit();
std::cout << "Game Cleaned." << std::endl;
}
主要功能:
#include "Game.h"
Game *game = nullptr;
int main(int argc, const char * argv[])
{
game = new Game();
game->init("BirchEngine", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 800, 600, false);
while (game->running())
{
game->handleEvents();
game->update();
game->render();
}
game->clean();
return 0;
}
我得到的错误:
1>SDL2main.lib(SDL_windows_main.obj):错误 LNK2019: 无法解析的外部符号 SDL_main,该符号在 main_utf8 函数中被引用
1>C:\Dev\2D_GameEngine\x64\Debug\2D_GameEngine.exe:致命错误 LNK1120: 1 个无法解析的外部
非常感谢您的帮助!