Computer-Aided-Design/Lecture1.cpp at master · kpaonaut/Computer-Aided-Design · GitHub

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//#include <glad/glad.h>
#include <GLFW/glfw3.h>

#include <stdio.h>

// settings
const unsigned int SCR_WIDTH = 800;
const unsigned int SCR_HEIGHT = 600;

void key_callback(GLFWwindow* window, int key, int scancode, int action, int mode);
void framebuffer_size_callback(GLFWwindow* window, int width, int height);


int main()
{

	glfwInit();
	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 1);
    glfwWindowHint (GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // This line is added by Rui
	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);

	GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
	if (window == NULL)
	{
		glfwTerminate();
		return -1;
	}

	glfwMakeContextCurrent(window);

	glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
	glfwSetKeyCallback(window, key_callback);

	// if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))
	// {
	// 	return -1;
	// }

	while (!glfwWindowShouldClose(window))
	{
		glfwPollEvents();

		glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
		glClear(GL_COLOR_BUFFER_BIT);

		glfwSwapBuffers(window);
	}

	glfwTerminate();
	return 0;
}

void key_callback(GLFWwindow* window, int key, int scancode, int action, int mode)
{
	if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
		glfwSetWindowShouldClose(window, GL_TRUE);
}
void framebuffer_size_callback(GLFWwindow* window, int width, int height)
{
	glViewport(0, 0, width, height);
}