想从unity转unreal了，于是要使用c++进行开发。unreal引擎那么大，每次打开，我的小本都嗡嗡嗡的，想着不如用个轻量一些的引擎先开发吧，核心代码独立出来，到时候如果真要移植到unreal也方便。
在sdl2/sfml中纠结了一下，最终选择了文档相对较多的sdl2。本来试用了Xcode，但是实在是不习惯，感觉和JetBrains的编译器差太远了...决定还是用clion试一下。
但是到处看了各种参考资料，没有一篇能完全满足我的要求：
- 1 在mac下开发
- 2 使用c/c++进行开发
- 3 用clion的CMake
- 4 智能提示SDL2库方法
作为编程多年，但是c语言还停留在大学水平的开发，我还*学习了Cmake。
一番摸索完成后，决定自己写一篇，记录的同时，也造福其他需要的人。
话不多说，开始吧！
利用homebrew安装sdl2
依次执行下面的命令就好了
- 安装国内镜像的Homebrew，一路往下YES就行
$ /bin/zsh -c "$(curl -fsSL https://gitee.com/cunkai/HomebrewCN/raw/master/Homebrew.sh)"
- 安装sdl2
$ brew install sdl2_mixer
- 查看下sdl2库安装情况
$ brew info sdl2
根据安装的版本不同，可能得到不同的信息,下面是我的
sdl2: stable 2.0.16 (bottled), HEAD
Low-level access to audio, keyboard, mouse, joystick, and graphics
https://www.libsdl.org/
/usr/local/Cellar/sdl2/2.0.16 (91 files, 5.4MB) *
Poured from bottle on 2021-08-27 at 05:51:01
From: https://mirrors.ustc.edu.cn/homebrew-core.git/Formula/sdl2.rb
License: Zlib
==> Options
--HEAD
Install HEAD version
==> Analytics
install: 107,393 (30 days), 219,217 (90 days), 957,010 (365 days)
install-on-request: 10,041 (30 days), 19,802 (90 days), 91,778 (365 days)
build-error: 0 (30 days)
其中，第4行的/usr/local/Cellar/sdl2/2.0.16很有用，是我们安装sdl2库的位置，下面会用到。
创建clion项目
我们分C项目和CPP项目。
创建项目的时候，记得选
C Executable或者C++ Executable哦。
C项目
- CMakeLists.txt内容
cmake_minimum_required(VERSION 3.20)
project(SimpleWindow C)
set(CMAKE_C_STANDARD 11)
set(SDL_DIR /usr/local/Cellar/sdl2/2.0.16/)
include_directories(${SDL_DIR}/include/)
link_directories(${SDL_DIR}/lib/)
add_executable(SimpleWindow main.c)
target_link_libraries(SimpleWindow SDL2 SLD2_test SDL2main)
- main.c内容
#include "stdio.h"
#include <SDL2/SDL.h>
const int WIDTH = 400, HEIGHT = 400;
int main() {
if (SDL_Init(SDL_INIT_EVERYTHING)) {
printf("Can not init video");
return 1;
}
SDL_Window *win = SDL_CreateWindow(
"Hello world",
SDL_WINDOWPOS_CENTERED,
SDL_WINDOWPOS_CENTERED, WIDTH, HEIGHT,
SDL_WINDOW_ALLOW_HIGHDPI
);
if (win == NULL) {
printf("Can not create window");
return 1;
}
SDL_Event windowEvent;
while(1) {
if (SDL_PollEvent(&windowEvent)) {
if (SDL_QUIT == windowEvent.type) {
printf("SDL quit!!");
break;
}
}
}
SDL_DestroyWindow(win);
SDL_Quit();
return 0;
}
都创建好了之后，点击运行，可以看到下面的窗口
CPP项目
- CMakeLists.txt内容
cmake_minimum_required(VERSION 3.20)
project(SimpleWindow)
set(CMAKE_C_STANDARD 11)
set(SDL_DIR /usr/local/Cellar/sdl2/2.0.16/)
include_directories(${SDL_DIR}/include/)
link_directories(${SDL_DIR}/lib/)
add_executable(SimpleWindow main.cpp)
link_libraries(SDL2)
target_link_libraries(SimpleWindow SDL2 SDL2main)
- main.cpp内容
#include <iostream>
#include <SDL2/SDL.h>
using namespace std;
const int WIDTH = 400, HEIGHT = 400;
int main() {
if (SDL_Init(SDL_INIT_EVERYTHING)) {
cout << "SDL could not initialized with error: " << SDL_GetError() << endl;
return 1;
}
SDL_Window *win = SDL_CreateWindow(
"Hello world",
SDL_WINDOWPOS_CENTERED,
SDL_WINDOWPOS_CENTERED, WIDTH, HEIGHT,
SDL_WINDOW_ALLOW_HIGHDPI
);
if (win == NULL) {
cout << "SDL could not create window with error: " << SDL_GetError() << endl;
return 1;
}
SDL_Event windowEvent;
while(true) {
if (SDL_PollEvent(&windowEvent)) {
if (SDL_QUIT == windowEvent.type) {
cout << "SDL quit!!" << endl;
break;
}
}
}
SDL_DestroyWindow(win);
SDL_Quit();
return 0;
}