glclear 和 GL_COLOR_BUFFER_BIT 有问题

Question

所以我遇到了 glClear 和 GL_COLOR_BUFFER_BIT 没有被“声明”的问题。 这是错误

[build] ../src/main.cpp:27:17: error: ‘GL_COLOR_BUFFER_BIT’ was not declared in this scope
[build]    27 |         glClear(GL_COLOR_BUFFER_BIT);
[build]       |                 ^~~~~~~~~~~~~~~~~~~
[build] ../src/main.cpp:27:9: error: ‘glClear’ was not declared in this scope
[build]    27 |         glClear(GL_COLOR_BUFFER_BIT);
[build]       |         ^~~~~~~

这是代码

#define GLFW_INCLUDE_NONE
#include <GLFW/glfw3.h>

int main(void)
{
GLFWwindow* window;

/* Initialize the library */
if (!glfwInit())
    return -1;

/* Create a windowed mode window and its OpenGL context */
window = glfwCreateWindow(640, 480, "Hello World", NULL, NULL);
if (!window)
{
    glfwTerminate();
    return -1;
}

/* Make the window's context current */
glfwMakeContextCurrent(window);

/* Loop until the user closes the window */
while (!glfwWindowShouldClose(window))
{
    /* Render here */
    glClear(GL_COLOR_BUFFER_BIT);

    /* Swap front and back buffers */
    glfwSwapBuffers(window);

    /* Poll for and process events */
    glfwPollEvents();
    }

glfwTerminate();
return 0;
}

这是 cmakelist.txt

cmake_minimum_required(VERSION 3.0.0)
project(OpenGL VERSION 0.1.0)

add_executable(OpenGL src/main.cpp)

我用的是arch Linux，我用的是vs codium

Answer 1

你告诉 GLFW 不 #include 适当的系统 gl.h (via #define GLFW_INCLUDE_NONE) 所以你必须自己 #include 它（或删除 #define）。