OpenGL笔记一之基础窗体搭建以及事件响应
bilibili赵新政老师的教程看后笔记
code review!
文章目录
- OpenGL笔记一之基础窗体搭建以及事件响应
- 1.运行
- 2.目录结构
- 3.main.cpp
- 4.CMakeList.txt
1.运行
2.目录结构
01_GLFW_WINDOW/
├── CMakeLists.txt
├── glad.c
├── main.cpp
└── thirdParty
├── include
│ ├── glad
│ │ └── glad.h
│ ├── GLFW
│ │ ├── glfw3.h
│ │ └── glfw3native.h
│ └── KHR
│ └── khrplatform.h
└── lib
└── glfw3.lib
6 directories, 8 files
3.main.cpp
#include <iostream>
//注意:glad头文件必须在glfw引用之前引用
#include<glad/glad.h>
#include <GLFW/glfw3.h>
/*
* 目标:
-创建glfw的窗体系统
-加入窗体变化的事件回调
-加入键盘消息事件回调
*
*/
//声明且实现一个响应窗体大小变化的函数
void frameBufferSizeCallBack(GLFWwindow* window, int width, int height) {
std::cout << "窗体最新大小:" << width << " , " << height << std::endl;
}
//声明且实现一个键盘消息回调函数
void keyCallBack(GLFWwindow* window, int key, int scancode, int action, int mods) {
if (key == GLFW_KEY_W) {
//触发了w
}
if (action == GLFW_PRESS) {
//键位按下
}
if (action == GLFW_RELEASE) {
//键位抬起
}
if (mods == GLFW_MOD_CONTROL) {
//按下ctrl的同时,按下了key
}
if (mods == GLFW_MOD_SHIFT) {
//按下shift的同时,按下了key
}
std::cout << "按下了:" << key << std::endl;
std::cout << "action:" << action << std::endl;
std::cout << "mods:" << mods << std::endl;
}
int main() {
//1 初始化GLFW基本环境
glfwInit();
//1.1 设置OpenGL主版本号、次版本号
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
//1.2 设置OpenGL启用核心模式(非立即渲染模式)
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
//2 创建窗体对象
GLFWwindow* window = glfwCreateWindow(800, 600, "OpenGLStudy", NULL, NULL);
//**设置当前窗体对象为OpenGL的绘制舞台
glfwMakeContextCurrent(window);
//设置监听,监听窗体大小变化的消息
glfwSetFramebufferSizeCallback(window, frameBufferSizeCallBack);
//设置监听,监听键盘消息
glfwSetKeyCallback(window, keyCallBack);
//3 执行窗体循环
while (!glfwWindowShouldClose(window)) {
//接收并分发窗体消息
//检查消息队列是否有需要处理的鼠标、键盘等消息
//如果有的话就将消息批量处理,清空队列
glfwPollEvents();
}
//4 退出程序前做相关清理
glfwTerminate();
return 0;
}
4.CMakeList.txt
# 指定 CMake 最低版本
cmake_minimum_required(VERSION 3.12)
# 项目名称
project(OpenGL_Lecture)
# 设置 C++ 标准
set(CMAKE_CXX_STANDARD 17)
# 包含头文件目录
include_directories(
${CMAKE_CURRENT_SOURCE_DIR}/thirdParty/include
/usr/include
)
# 包含库文件目录
link_directories(
${CMAKE_CURRENT_SOURCE_DIR}/thirdParty/lib
/usr/lib/x86_64-linux-gnu
)
# 设置 CMAKE_PREFIX_PATH 以找到 GLFW
set(CMAKE_PREFIX_PATH "/usr/local/lib/cmake/glfw3")
set(GLFW_DIR "/usr/local/lib/cmake/glfw3")
# 查找 GLFW3 库
find_package(glfw3 REQUIRED CONFIG)
# 添加可执行文件
add_executable(openglStudy "main.cpp" "glad.c")
# 链接库
target_link_libraries(openglStudy glfw)