FragColor = mix(texture(texture1,TexCoord), texture(texture2,vec2(1.0 - TexCoord.x, TexCoord.y)),0.78f);

// OpenGLDemo.cpp: 定义控制台应用程序的入口点。#include "stdafx.h"
#include <glad/glad.h>
#include <GLFW/glfw3.h>
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <fstream>
#include <string>
#include <cstring>
#include "Shader.h"
#include <stb_image/stb_image.h>
#include<filesystem>using namespace std;void framebuffer_size_callback(GLFWwindow* window, int width, int height);
void processInput(GLFWwindow* window);
char* readTheFile(string strSource);int main()
{//glfw: 初始化glfwInit();glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR,3);glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR,3);glfwWindowHint(GLFW_OPENGL_PROFILE,GLFW_OPENGL_CORE_PROFILE);//glfw: 窗口创建GLFWwindow* window = glfwCreateWindow(800, 600, "Oh!I see you!", NULL, NULL);if (window == NULL) {std::cout << "Failed to create the windows" << std::endl;glfwTerminate();return -1;}glfwMakeContextCurrent(window);glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);glfwSwapInterval(1);//glad: 加载OpenGL 函数指针if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {std::cout << "Failed to initialize GLAD" << std::endl;return -1;}Shader shader("vertexShaderSource.vert", "fragmentShaderSource.frag");float vertices[] = {//第一个三角形//  ----位置----   ----颜色----     --纹理坐标--.5f,.5f,0.0f, 1.0f,0.0f,0.0f,  0.0f,1.0f,       //左上   -.5f,-.5f,.0f, 0.0f,1.0f,0.0f,  0.0f,0.0f,       //左下.5f,-.5f,.0f, 0.0f,0.0f,1.0f,  1.0f,0.0f,       //右下.5f, .5f,.0f, 0.0f,0.0f,1.0f,  1.0f,1.0f        //右上};unsigned int indices[] = {0,1,2,0,3,2};unsigned int VBO, VAO, EBO;glGenVertexArrays(1, &VAO);glGenBuffers(1, &VBO);glGenBuffers(1, &EBO);//绑定顶点数组glBindVertexArray(VAO);glBindBuffer(GL_ARRAY_BUFFER, VBO);glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);//指针分配glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)0);glEnableVertexAttribArray(0);glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(3 * sizeof(float)));glEnableVertexAttribArray(1);glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(6 * sizeof(float)));glEnableVertexAttribArray(2);//texture 1//---------unsigned int texture1,texture2;glGenTextures(1, &texture1);glBindTexture(GL_TEXTURE_2D, texture1);为当前绑定的纹理对象设置环绕、过滤方式glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_MIRRORED_REPEAT);glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_MIRRORED_REPEAT);float borderColor[] = { 1.0f,1.0f,0.0f,1.0f };glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, borderColor);glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);//加载纹理图片int width, height, nrChannels;unsigned char *data = stbi_load("container.jpg", &width, &height, &nrChannels, 0);if (data) {//生成纹理图片glTexImage2D(GL_TEXTURE_2D,0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);glGenerateMipmap(GL_TEXTURE_2D);       }else {std::cout << "Failed to load texture" << std::endl;}//释放内存stbi_image_free(data);//texture 2//---------glGenTextures(1, &texture2);glBindTexture(GL_TEXTURE_2D, texture2);glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_MIRRORED_REPEAT);glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_MIRRORED_REPEAT);glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);stbi_set_flip_vertically_on_load(true);data = stbi_load("LJW.png", &width, &height, &nrChannels, 0);if (data){glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);glGenerateMipmap(GL_TEXTURE_2D);}else{std::cout << "Failed to load texture" << std::endl;}stbi_image_free(data);shader.use();shader.setInt("texture1", 0);shader.setInt("texture2", 1);while (!glfwWindowShouldClose(window)) {//输入处理processInput(window);//渲染指令glClearColor(0.2f,0.3f,0.3f,1.0f);glClear(GL_COLOR_BUFFER_BIT);glActiveTexture(GL_TEXTURE0);glBindTexture(GL_TEXTURE_2D, texture1);glActiveTexture(GL_TEXTURE1);glBindTexture(GL_TEXTURE_2D, texture2);shader.use();glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);glBindVertexArray(VAO);glDrawArrays(GL_TRIANGLES,0,3);glfwSwapBuffers(window);glfwPollEvents();}glfwTerminate();return 0;
}void framebuffer_size_callback(GLFWwindow* windows, int width, int height) {glViewport(0, 0, width, height);
}void processInput(GLFWwindow* window) {if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS) {glfwSetWindowShouldClose(window, true);}
}//.frag .vert文件读取
char* readTheFile(string strSource) {//fstream 中判断是否成功打开文件//https://blog.csdn.net/fruitz/article/details/41624921std::ifstream myfile(strSource);//打开失败if (myfile.fail()) {std::cout << "Can not open it " << std::endl;throw new runtime_error("IO stream corrupted");}//转换成字符串std::string str((std::istreambuf_iterator<char>(myfile)),std::istreambuf_iterator<char>());//关闭文件处理器myfile.close();//str数组长度一定要 +1,/*原因: https://blog.csdn.net/ShiQW5696/article/details/80676290 */int len = str.length();char* result = new char[len];strcpy_s(result, len + 1, str.c_str());return result;
}

#version 330 core
out vec4 FragColor;in vec2 TexCoord;
in vec3 outColor;uniform sampler2D texture1;
uniform sampler2D texture2;void main()
{FragColor = mix(texture(texture1,TexCoord), texture(texture2,vec2(1.0 - TexCoord.x, TexCoord.y)),0.78f);
}

#version 330 core
layout(location = 0) in vec3 aPos;
layout(location = 1) in vec3 aColor;
layout(location = 2) in vec2 aTexCoord;out vec3 outColor;
out vec2 TexCoord;void main()
{gl_Position = vec4(aPos, 1.0);outColor = aColor;TexCoord = aTexCoord;
}