OpenGL-BuildCamera.zip

/*** * 例程 摄像机类的添加 (MAKE后运行时可删除ALL_BUILD，也可以将Task-camera设为默认启动工程) * 步骤: * 加载摄像机类进行操作即可 */ #include <iostream> #include "glad/glad.h" #include "GLFW/glfw3.h" #include "Shader.h" #include "Camera.h" //鼠标键盘响应函数 void framebuffer_size_callback(GLFWwindow* window, int width, int height); void mouse_callback(GLFWwindow* window, double xpos, double ypos); void scroll_callback(GLFWwindow* window, double xoffset, double yoffset); void processInput(GLFWwindow *window); const float vertices[] = { //立方体数组 -0.5f, -0.5f, -0.5f, 1.0f,0.0f,0.0f, 0.5f, -0.5f, -0.5f, 1.0f,0.0f,0.0f, 0.5f, 0.5f, -0.5f, 1.0f,0.0f,0.0f, 0.5f, 0.5f, -0.5f, 1.0f,0.0f,0.0f, -0.5f, 0.5f, -0.5f, 1.0f,0.0f,0.0f, -0.5f, -0.5f, -0.5f, 1.0f,0.0f,0.0f, -0.5f, -0.5f, 0.5f, 0.0f,1.0f,0.0f, 0.5f, -0.5f, 0.5f, 0.0f,1.0f,0.0f, 0.5f, 0.5f, 0.5f, 0.0f,1.0f,0.0f, 0.5f, 0.5f, 0.5f, 0.0f,1.0f,0.0f, -0.5f, 0.5f, 0.5f, 0.0f,1.0f,0.0f, -0.5f, -0.5f, 0.5f, 0.0f,1.0f,0.0f, -0.5f, 0.5f, 0.5f, 0.0f,0.0f,1.0f, -0.5f, 0.5f, -0.5f, 0.0f,0.0f,1.0f, -0.5f, -0.5f, -0.5f, 0.0f,0.0f,1.0f, -0.5f, -0.5f, -0.5f, 0.0f,0.0f,1.0f, -0.5f, -0.5f, 0.5f, 0.0f,0.0f,1.0f, -0.5f, 0.5f, 0.5f, 0.0f,0.0f,1.0f, 0.5f, 0.5f, 0.5f, 0.5f,0.0f,0.0f, 0.5f, 0.5f, -0.5f, 0.5f,0.0f,0.0f, 0.5f, -0.5f, -0.5f, 0.5f,0.0f,0.0f, 0.5f, -0.5f, -0.5f, 0.5f,0.0f,0.0f, 0.5f, -0.5f, 0.5f, 0.5f,0.0f,0.0f, 0.5f, 0.5f, 0.5f, 0.5f,0.0f,0.0f, -0.5f, -0.5f, -0.5f, 0.0f,0.5f,0.0f, 0.5f, -0.5f, -0.5f, 0.0f,0.5f,0.0f, 0.5f, -0.5f, 0.5f, 0.0f,0.5f,0.0f, 0.5f, -0.5f, 0.5f, 0.0f,0.5f,0.0f, -0.5f, -0.5f, 0.5f, 0.0f,0.5f,0.0f, -0.5f, -0.5f, -0.5f, 0.0f,0.5f,0.0f, -0.5f, 0.5f, -0.5f, 0.0f,0.0f,0.5f, 0.5f, 0.5f, -0.5f, 0.0f,0.0f,0.5f, 0.5f, 0.5f, 0.5f, 0.0f,0.0f,0.5f, 0.5f, 0.5f, 0.5f, 0.0f,0.0f,0.5f, -0.5f, 0.5f, 0.5f, 0.0f,0.0f,0.5f, -0.5f, 0.5f, -0.5f, 0.0f,0.0f,0.5f }; float screen_width = 1280.0f; //窗口宽度 float screen_height = 720.0f; //窗口高度 //摄像机相关参数 Camera camera(glm::vec3(0.0f, 0.0f, 3.0f)); float lastX = screen_width / 2.0f; float lastY = screen_height / 2.0f; bool firstMouse = true; float deltaTime = 0.0f; float lastFrame = 0.0f; int main() { // 初始化GLFW glfwInit(); // 初始化GLFW glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3); // OpenGL版本为3.3，主次版本号均设为3 glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3); glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE); // 使用核心模式(无需向后兼容性) glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // 如果使用的是Mac OS X系统，需加上这行 glfwWindowHint(GLFW_RESIZABLE, false); // 不可改变窗口大小 // 创建窗口(宽、高、窗口名称) auto window = glfwCreateWindow(screen_width, screen_height, "Camera", nullptr, nullptr); if (window == nullptr) { std::cout << "Failed to Create OpenGL Context" << std::endl; glfwTerminate(); return -1; } glfwMakeContextCurrent(window); glfwSetFramebufferSizeCallback(window, framebuffer_size_callback); glfwSetCursorPosCallback(window, mouse_callback); glfwSetScrollCallback(window, scroll_callback); glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED); // 初始化GLAD，加载OpenGL函数指针地址的函数 if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) { std::cout << "Failed to initialize GLAD" << std::endl; return -1; } // 指定当前视口尺寸(前两个参数为左下角位置，后两个参数是渲染窗口宽、高) glViewport(0, 0, screen_width, screen_height); Shader shader("shader/task-camera.vs", "shader/task-camera.fs");//加载着色器 GLuint vertex_array_object; // == VAO glGenVertexArrays(1, &vertex_array_object); glBindVertexArray(vertex_array_object); GLuint vertex_buffer_object; // == VBO glGenBuffers(1, &vertex_buffer_object); glBindBuffer(GL_ARRAY_BUFFER, vertex_buffer_object); // 将顶点数据绑定至当前默认的缓冲中 glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW); // 设置顶点属性指针 glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)0); glEnableVertexAttribArray(0); glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)(3 * sizeof(float))); glEnableVertexAttribArray(1); glEnable(GL_DEPTH_TEST); // 渲染循环 while (!glfwWindowShouldClose(window)) { //计算每帧的时间差 float currentFrame = glfwGetTime(); deltaTime = currentFrame - lastFrame; lastFrame = currentFrame; processInput(window); glClearColor(0.0f, 0.34f, 0.57f, 1.0f); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);//清理颜色缓冲和深度缓冲 shader.Use(); // Transform坐标变换矩阵 glm::mat4 model(1);//model矩阵，局部坐标变换至世界坐标 model = glm::rotate(model, (float)glfwGetTime(), glm::vec3(0.5f, 1.0f, 0.0f)); glm::mat4 view(1);//view矩阵，世界坐标变换至观察坐标系 view = camera.GetViewMatrix(); glm::mat4 projection(1);//projection矩阵，投影矩阵 projection = glm::perspective(glm::radians(camera.Zoom), screen_width / screen_height, 0.1f, 100.0f); // 向着色器中传入参数 shader.SetMat4("model", model); shader.SetMat4("view", view); shader.SetMat4("projection", projection); //绘制 glBindVertexArray(vertex_array_object); glDrawArrays(GL_TRIANGLES, 0, 36); glBindVertexArray(0); glfwSwapBuffers(window); glfwPollEvents(); } //释放VAOVBO glDeleteVertexArrays(1, &vertex_array_object); glDeleteBuffers(1, &vertex_buffer_object); // 清理所有的资源并正确退出程序 glfwTerminate(); return 0; } //键盘输入 void processInput(GLFWwindow *window) { if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS) glfwSetWindowShouldClose(window, true); if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS) camera.ProcessKeyboard(FORWARD, deltaTime); if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS) camera.ProcessKeyboard(BACKWARD, deltaTime); if (glfwGetKey(window, GLFW_KEY_A) == GLFW_PRESS) camera.ProcessKeyboard(LEFT, deltaTime); if (glfwGetKey(window, GLFW_KEY_D) == GLFW_PRESS) camera.ProcessKeyboard(RIGHT, deltaTime); } //窗口分辨率自适应 void framebuffer_size_callback(GLFWwindow* window, int width, int height) { glViewport(0, 0, width, height); } //鼠标移动响应 void mouse_callback(GLFWwindow* window, double xpos, double ypos) { if (firstMouse) { lastX = xpos; lastY = ypos; firstMouse = false; } float xoffset = xpos - lastX; float yoffset = lastY - ypos; lastX = xpos; lastY = ypos; camera.ProcessMouseMovement(xoffset, yoffset); } //鼠标滚轮响应 void scroll_callback(GLFWwindow* window, double xoffset, double yoffset) { camera.ProcessMouseScroll(yoffset); }