着色器，头文件在“纹理””那节随笔中

#include <iostream>
using namespace std;

#define GLEW_STATIC
#include <GL/glew.h>
#include <GLFW/glfw3.h>
#include "shader.h"

const unsigned int SCR_WIDTH = 800;
const unsigned int SCR_HEIGHT = 600;
void framebuffer_size_callback(GLFWwindow* window, int width, int height)
{
    glViewport(0, 0, width, height);
}

void processInput(GLFWwindow* window)
{
    if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
        glfwSetWindowShouldClose(window, true);
}

int main()
{
    glfwInit();
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);

    //创建一个glfw窗口
    GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
    if (!window)
    {
        cout << "Failed to create GLFW window!
" << endl;
        glfwTerminate();
        return -1;
    }

    glfwMakeContextCurrent(window);
    glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);    //改变窗口大小的回调函数

    glewExperimental = GL_TRUE;
    if (glewInit() != GLEW_OK)
    {
        cout << "Failed to create initialize GLEW!
" << endl;
        return -1;
    }

    Shader ourShader("E:\C++\1.txt", "E:\C++\2.txt");

    GLfloat vertices[] = {
        0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f,
        -0.5f, -0.5f, 0.0f, 0.0f, 1.0f, 0.0f,
        0.0f, 0.5f, 0.0f, 0.0f, 0.0f, 1.0f
    };
    unsigned int VBO, VAO;
    glGenVertexArrays(1, &VAO);
    glGenBuffers(1, &VBO);

    glBindVertexArray(VAO);
    glBindBuffer(GL_ARRAY_BUFFER, VBO);
    glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);

    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)0);    //位置属性
    glEnableVertexAttribArray(0);    //启用这个属性

    //glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)(3 * sizeof(float)));    //颜色属性
    //glEnableVertexAttribArray(1);

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

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

        ourShader.use();

        //GLfloat offset = 0.5f;
        //ourShader.setFloat("xOffset", offset);

        glBindVertexArray(VAO);
        glDrawArrays(GL_TRIANGLES, 0, 3);


        glfwSwapBuffers(window);
        glfwPollEvents();


    }

    glDeleteVertexArrays(1, &VAO);
    glDeleteBuffers(1, &VBO);

    glfwTerminate();

    return 0;

}