着色器，头文件在“纹理””那节随笔中

 1 #include <iostream>
 2 using namespace std;
 3 
 4 #define GLEW_STATIC
 5 #include <GL/glew.h>
 6 #include <GLFW/glfw3.h>
 7 #include "shader.h"
 8 
 9 const unsigned int SCR_WIDTH = 800;
10 const unsigned int SCR_HEIGHT = 600;
11 void framebuffer_size_callback(GLFWwindow* window, int width, int height)
12 {
13     glViewport(0, 0, width, height);
14 }
15 
16 void processInput(GLFWwindow* window)
17 {
18     if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
19         glfwSetWindowShouldClose(window, true);
20 }
21 
22 int main()
23 {
24     glfwInit();
25     glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
26     glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
27     glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
28 
29     //创建一个glfw窗口
30     GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
31     if (!window)
32     {
33         cout << "Failed to create GLFW window!
" << endl;
34         glfwTerminate();
35         return -1;
36     }
37 
38     glfwMakeContextCurrent(window);
39     glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);    //改变窗口大小的回调函数
40 
41     glewExperimental = GL_TRUE;
42     if (glewInit() != GLEW_OK)
43     {
44         cout << "Failed to create initialize GLEW!
" << endl;
45         return -1;
46     }
47 
48     Shader ourShader("E:\C++\1.txt", "E:\C++\2.txt");
49 
50     GLfloat vertices[] = {
51         0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f,
52         -0.5f, -0.5f, 0.0f, 0.0f, 1.0f, 0.0f,
53         0.0f, 0.5f, 0.0f, 0.0f, 0.0f, 1.0f
54     };
55     unsigned int VBO, VAO;
56     glGenVertexArrays(1, &VAO);
57     glGenBuffers(1, &VBO);
58 
59     glBindVertexArray(VAO);
60     glBindBuffer(GL_ARRAY_BUFFER, VBO);
61     glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
62 
63     glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)0);    //位置属性
64     glEnableVertexAttribArray(0);    //启用这个属性
65 
66     //glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)(3 * sizeof(float)));    //颜色属性
67     //glEnableVertexAttribArray(1);
68 
69     while (!glfwWindowShouldClose(window))
70     {
71         processInput(window);
72 
73         glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
74         glClear(GL_COLOR_BUFFER_BIT);
75 
76         ourShader.use();
77 
78         //GLfloat offset = 0.5f;
79         //ourShader.setFloat("xOffset", offset);
80 
81         glBindVertexArray(VAO);
82         glDrawArrays(GL_TRIANGLES, 0, 3);
83 
84 
85         glfwSwapBuffers(window);
86         glfwPollEvents();
87 
88 
89     }
90 
91     glDeleteVertexArrays(1, &VAO);
92     glDeleteBuffers(1, &VBO);
93 
94     glfwTerminate();
95 
96     return 0;
97 
98 }