#include "GL/glew.h"
#include "GLFW/glfw3.h"
#include <iostream>
using namespace std;
void init(GLFWwindow* window) { }
void display(GLFWwindow* window, double currentTime) {
	glClearColor(1.0, 0.0, 0.0, 1.0);
	glClear(GL_COLOR_BUFFER_BIT);
}
int main(void) {
	if (!glfwInit()) { exit(EXIT_FAILURE); }
	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
	GLFWwindow* window = glfwCreateWindow(600, 600, "Empty glfw window", NULL, NULL);
	glfwMakeContextCurrent(window);
	if (glewInit() != GLEW_OK) { exit(EXIT_FAILURE); }
	glfwSwapInterval(1);
	init(window);
	while (!glfwWindowShouldClose(window)) {
		display(window, glfwGetTime());
		glfwSwapBuffers(window);
		glfwPollEvents();
	}
	glfwDestroyWindow(window);
	glfwTerminate();
	exit(EXIT_SUCCESS);
}

/*
#include "GL/glew.h"
#include "GLFW/glfw3.h"
#include <iostream>
using namespace std;
#define numVAOs 1
GLuint renderingProgram;
GLuint vao[numVAOs];
GLuint createShaderProgram() {
	const char* vshaderSource =
		"#version 430 \n"
		"void main(void) \n"
		"{ gl_Position = vec4(0.0, 0.0, 0.0, 1.0); }";
	const char* fshaderSource =
		"#version 430 \n"
		"out vec4 color; \n"

"void main(void) \n"
"{ color = vec4(0.5, 0.0, 1.0, 1.0); }";
GLuint vShader = glCreateShader(GL_VERTEX_SHADER);
GLuint fShader = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(vShader, 1, &vshaderSource, NULL);
glShaderSource(fShader, 1, &fshaderSource, NULL);
glCompileShader(vShader);
glCompileShader(fShader);
GLuint vfProgram = glCreateProgram();
glAttachShader(vfProgram, vShader);
glAttachShader(vfProgram, fShader);
glLinkProgram(vfProgram);
return vfProgram;
}
void init(GLFWwindow* window) {
	renderingProgram = createShaderProgram();
	glGenVertexArrays(numVAOs, vao);
	glBindVertexArray(vao[0]);
}
void display(GLFWwindow* window, double currentTime) {
	//glClearColor(1.0, 0.0, 0.0, 1.0);
	//glClear(GL_COLOR_BUFFER_BIT);
	glUseProgram(renderingProgram);
	glPointSize(30.0f);
	glDrawArrays(GL_POINTS, 0, 1);
}
int main(void) {
	if (!glfwInit()) { exit(EXIT_FAILURE); }
	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
	GLFWwindow* window = glfwCreateWindow(600, 600, "Empty glfw window", NULL, NULL);
	glfwMakeContextCurrent(window);
	if (glewInit() != GLEW_OK) { exit(EXIT_FAILURE); }
	glfwSwapInterval(1);
	init(window);
	while (!glfwWindowShouldClose(window)) {
		display(window, glfwGetTime());
		glfwSwapBuffers(window);
		glfwPollEvents();
	}
	glfwDestroyWindow(window);
	glfwTerminate();
	exit(EXIT_SUCCESS);
}
*/