https://www.khronos.org/opengl/wiki/FAQ
https://www.khronos.org/opengl/wiki/OpenGL_Loading_Library
Complete Source Code:
Main.cpp
#define GLEW_STATIC
#include <GL/glew.h>
#include <GLFW/glfw3.h>
#include <iostream>
using namespace std;
void framebuffer_size_callback(GLFWwindow* window, int width, int height)
{
cout << "framebuffer resized to " << width << " x " << height << endl;
}
void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
{
if (key == GLFW_KEY_E && action == GLFW_PRESS)
cout << "key 'E' pressed" << endl;
}
void cursor_position_callback(GLFWwindow* window, double xpos, double ypos)
{
cout << "cursor moved to " << xpos << " x " << ypos << endl;
}
void mouse_button_callback(GLFWwindow* window, int button, int action, int mods)
{
if (button == GLFW_MOUSE_BUTTON_RIGHT && action == GLFW_PRESS)
cout << "right clicked" << endl;
}
void scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
{
cout << "scrolled" << endl;
}
void joystick_callback(int joy, int event)
{
if (event == GLFW_CONNECTED)
{
cout << "joystick connected" << endl;
}
else if (event == GLFW_DISCONNECTED)
{
cout << "joystick disconnected" << endl;
}
}
int main(int argc, char* argv[])
{
/* Initialize GLFW */
if (!glfwInit())
return -1;
/* Create a window and its OpenGL context */
bool fullscreen = false;
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 5);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
GLFWmonitor* monitor = fullscreen ? glfwGetPrimaryMonitor() : NULL;
GLFWwindow* window = glfwCreateWindow(800, 600, "OpenGL", monitor, NULL);
if (!window)
{
glfwTerminate();
return -1;
}
/* Make the window's context current */
glfwMakeContextCurrent(window);
/* Set callback functions */
glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
glfwSetKeyCallback(window, key_callback);
glfwSetCursorPosCallback(window, cursor_position_callback);
glfwSetMouseButtonCallback(window, mouse_button_callback);
glfwSetScrollCallback(window, scroll_callback);
glfwSetJoystickCallback(joystick_callback);
/* Initialize GLEW */
if (glewInit() != GLEW_OK)
{
glfwTerminate();
return -2;
}
/* 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;
}