#ifndef CAMERA_H #define CAMERA_H #include <glad/glad.h> #include <glm/glm.hpp> #include <glm/gtc/matrix_transform.hpp> #include <vector> enum Camera_Movement { FORWARD, BACKWARD, LEFT, RIGHT }; //相机方向枚举 const float YAW = -90.0f; //俯仰角 const float PITCH = 0.0f; // 偏航角 const float SPEED = 2.5f; //移动速度 const float SENSITIVITY = 0.1f; //灵敏度 const float ZOOM = 45.0f; //FOV class Camera { public: // 相机参数 glm::vec3 Position; glm::vec3 Front; glm::vec3 Up; glm::vec3 Right; glm::vec3 WorldUp; // 欧拉角 float Yaw; float Pitch; // 相机参数 float MovementSpeed; float MouseSensitivity; float Zoom; //构造函数用向量定义 Camera(glm::vec3 position = glm::vec3(0.0f, 0.0f, 0.0f), glm::vec3 up = glm::vec3(0.0f, 1.0f, 0.0f), float yaw = YAW, float pitch = PITCH) : Front(glm::vec3(0.0f, 0.0f, -1.0f)), MovementSpeed(SPEED), MouseSensitivity(SENSITIVITY), Zoom(ZOOM) { Position = position; WorldUp = up; Yaw = yaw; Pitch = pitch; updateCameraVectors(); } // 用值初始化构造函数 Camera(float posX, float posY, float posZ, float upX, float upY, float upZ, float yaw, float pitch) : Front(glm::vec3(0.0f, 0.0f, -1.0f)), MovementSpeed(SPEED), MouseSensitivity(SENSITIVITY), Zoom(ZOOM) { Position = glm::vec3(posX, posY, posZ); WorldUp = glm::vec3(upX, upY, upZ); Yaw = yaw; Pitch = pitch; updateCameraVectors(); } //返回用lookat构造的view矩阵 glm::mat4 GetViewMatrix() { return glm::lookAt(Position, Position + Front, Up); } // 键盘检测 void ProcessKeyboard(Camera_Movement direction, float deltaTime) { float velocity = MovementSpeed * deltaTime; if (direction == FORWARD) Position += Front * velocity; if (direction == BACKWARD) Position -= Front * velocity; if (direction == LEFT) Position -= Right * velocity; if (direction == RIGHT) Position += Right * velocity; } // 鼠标检测 void ProcessMouseMovement(float xoffset, float yoffset, GLboolean constrainPitch = true) { xoffset *= MouseSensitivity; yoffset *= MouseSensitivity; Yaw += xoffset; Pitch += yoffset; //角度限制 if (constrainPitch) { if (Pitch > 89.0f) Pitch = 89.0f; if (Pitch < -89.0f) Pitch = -89.0f; } //用现有参数更新相机状态 updateCameraVectors(); } // FOV设置, 同时加上大小限制 void ProcessMouseScroll(float yoffset) { Zoom -= (float)yoffset; if (Zoom < 1.0f) Zoom = 1.0f; if (Zoom > 45.0f) Zoom = 45.0f; } private: // 用当前相机内的信息更新相机状态 void updateCameraVectors() { // 计算新的front向量参数值 glm::vec3 front; front.x = cos(glm::radians(Yaw)) * cos(glm::radians(Pitch)); front.y = sin(glm::radians(Pitch)); front.z = sin(glm::radians(Yaw)) * cos(glm::radians(Pitch)); Front = glm::normalize(front); // 同时重新计算Right和Up参数值 Right = glm::normalize(glm::cross(Front, WorldUp)); //用于键盘输入的移动，叉积得到垂直的右手系方向 Up = glm::normalize(glm::cross(Right, Front)); } }; #endif
Camera.cpp
#include<glad/glad.h> #include<string> #include<fstream> #include<sstream> #include<iostream> #include <glm/glm.hpp> #include <glm/gtc/matrix_transform.hpp> #include <glm/gtc/type_ptr.hpp> using namespace std; class Shader { private: void checkCompileErrors(unsigned int shader, std::string type) { int success; char infoLog[1024]; if (type != "PROGRAM") { glGetShaderiv(shader, GL_COMPILE_STATUS, &success); if (!success) { glGetShaderInfoLog(shader, 1024, NULL, infoLog); std::cout << "ERROR::SHADER_COMPILATION_ERROR of type: " << type << "\n" << infoLog << "\n -- -------------!!!!!!!!-------------------------------------- -- " << std::endl; } } else { glGetProgramiv(shader, GL_LINK_STATUS, &success); if (!success) { glGetProgramInfoLog(shader, 1024, NULL, infoLog); std::cout << "ERROR::PROGRAM_LINKING_ERROR of type: " << type << "\n" << infoLog << "\n -- ------------------!!!!!!!!!--------------------------------- -- " << std::endl; } } } public: unsigned int ID; Shader(const char* vertexPath, const char* fragmentPath) { std::string vertexCode; std::string fragmentCode; std::ifstream vShaderFile; std::ifstream fShaderFile; vShaderFile.exceptions(std::ifstream::failbit | std::ifstream::badbit); fShaderFile.exceptions(std::ifstream::failbit | std::ifstream::badbit); try { vShaderFile.open(vertexPath); fShaderFile.open(fragmentPath); std::stringstream vShaderStream, fShaderStream; vShaderStream << vShaderFile.rdbuf(); fShaderStream << fShaderFile.rdbuf(); vShaderFile.close(); fShaderFile.close(); vertexCode = vShaderStream.str(); fragmentCode = fShaderStream.str(); } catch (std::ifstream::failure& e) { std::cout << "ERROR::SHADER::FILE_NOT_SUCCESFULLY_READ: " << e.what() << std::endl; } const char* vShaderCode = vertexCode.c_str(); const char * fShaderCode = fragmentCode.c_str(); unsigned int vertex, fragment; vertex = glCreateShader(GL_VERTEX_SHADER); fragment = glCreateShader(GL_FRAGMENT_SHADER); glShaderSource(vertex, 1, &vShaderCode, NULL); glShaderSource(fragment, 1, &fShaderCode, NULL); glCompileShader(vertex); glCompileShader(fragment); checkCompileErrors(vertex, "VERTEX"); checkCompileErrors(fragment, "FRAGMENT"); ID = glCreateProgram(); glAttachShader(ID, vertex); glAttachShader(ID, fragment); glLinkProgram(ID); checkCompileErrors(ID, "PROGRAM"); glDeleteShader(vertex); glDeleteShader(fragment); } void useShader() { glUseProgram(ID); } void setBool(const std::string &name, bool value) const { glUniform1i(glGetUniformLocation(ID, name.c_str()), (int)value); } void setInt(const std::string &name, int value) const { glUniform1i(glGetUniformLocation(ID, name.c_str()), value); } void setFloat(const std::string &name, float value) const { glUniform1f(glGetUniformLocation(ID, name.c_str()), value); } void setMat4(const std::string &name, const glm::mat4 &mat) const { glUniformMatrix4fv(glGetUniformLocation(ID, name.c_str()), 1, GL_FALSE, &mat[0][0]); //第二个参数count指明要更改的元素个数。如果目标uniform变量不是一个数组，那么这个值应该设为1；如果是数组，则应该设置为>=1。如果是matrix矩阵：指明要更改的矩阵个数 //第三个参数 是否转置矩阵 第四个参数 ，一个指向count元素的指针 } void setVec2(const std::string &name, const glm::vec2 &value) const { glUniform2fv(glGetUniformLocation(ID, name.c_str()), 1, &value[0]); } void setVec2(const std::string &name, float x, float y) const { glUniform2f(glGetUniformLocation(ID, name.c_str()), x, y); } void setVec3(const std::string &name, const glm::vec3 &value) const { glUniform3fv(glGetUniformLocation(ID, name.c_str()), 1, &value[0]); } void setVec3(const std::string &name, float x, float y, float z) const { glUniform3f(glGetUniformLocation(ID, name.c_str()), x, y, z); } void setVec4(const std::string &name, const glm::vec4 &value) const { glUniform4fv(glGetUniformLocation(ID, name.c_str()), 1, &value[0]); } void setVec4(const std::string &name, float x, float y, float z, float w) const { glUniform4f(glGetUniformLocation(ID, name.c_str()), x, y, z, w); } void setMat2(const std::string &name, const glm::mat2 &mat) const { glUniformMatrix2fv(glGetUniformLocation(ID, name.c_str()), 1, GL_FALSE, &mat[0][0]); } void setMat3(const std::string &name, const glm::mat3 &mat) const { glUniformMatrix3fv(glGetUniformLocation(ID, name.c_str()), 1, GL_FALSE, &mat[0][0]); } };
Shader.cpp
#include <glad/glad.h> #include <GLFW\glfw3.h> #include<iostream> #include"Shader.cpp" #include "stb_image.h" #include<fstream> #include <glm/glm.hpp> #include <glm/gtc/matrix_transform.hpp> #include <glm/gtc/type_ptr.hpp> #include "Camera.cpp" using namespace std; //shader //相机初始坐标 Camera camera(glm::vec3(0.0f, 0.0f, 3.0f)); float lastX = 800 / 2.0f; float lastY = 600 / 2.0f; bool firstMouse = true; // lighting glm::vec3 lightPos(1.2f, 1.0f, 2.0f); // 根据机器性能的帧数确定时间缩放，进行同步 float deltaTime = 0.0f; float lastFrame = 0.0f; //回调函数，改变窗口大小时进行相应操作 void framebuffer_size_callback(GLFWwindow* window, int width, int height) { glViewport(0, 0, width, height); } // 鼠标检测回调函数 void mouse_callback(GLFWwindow* window, double xposIn, double yposIn) { float xpos = static_cast<float>(xposIn); float ypos = static_cast<float>(yposIn); if (firstMouse) { lastX = xpos; lastY = ypos; firstMouse = false; } float xoffset = xpos - lastX; float yoffset = lastY - ypos; lastX = xpos; lastY = ypos; camera.ProcessMouseMovement(xoffset, yoffset); } //缩放回调函数 void scroll_callback(GLFWwindow* window, double xoffset, double yoffset) { camera.ProcessMouseScroll(static_cast<float>(yoffset)); } //键盘检测 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); } //加载模型 unsigned int loadTexture(char const * path) { unsigned int textureID; glGenTextures(1, &textureID); int width, height, nrComponents; unsigned char *data = stbi_load(path, &width, &height, &nrComponents, 0); if (data) { GLenum format; if (nrComponents == 1) format = GL_RED; else if (nrComponents == 3) format = GL_RGB; else if (nrComponents == 4) format = GL_RGBA; glBindTexture(GL_TEXTURE_2D, textureID); glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, format, GL_UNSIGNED_BYTE, data); glGenerateMipmap(GL_TEXTURE_2D); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); stbi_image_free(data); } else { std::cout << "Texture failed to load at path: " << path << std::endl; stbi_image_free(data); } return textureID; } int main() { //GL版本设置 glfwInit(); glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3); // 主版本号 glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3); // 子版本号 glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE); //核心模式 GLFWwindow* window = glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL); //设置窗口大小以及名称 if (window == NULL) { std::cout << "Failed to create GLFW window" << std::endl; glfwTerminate(); return -1; } glfwMakeContextCurrent(window); // 设置当前上下文为当前窗口 if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) { std::cout << "Error!" << std::endl; return -1; } glViewport(0, 0, 800, 600); // 设置视口大小 glfwSetFramebufferSizeCallback(window, framebuffer_size_callback); // 注册改变窗口大小的回调函数,此处为代理。 glfwSetCursorPosCallback(window, mouse_callback); glfwSetScrollCallback(window, scroll_callback); // 设置鼠标控制模式为捕捉鼠标，将其放在屏幕中心 glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED); const char* vertexPath = "lightingVertexShader.in"; const char* fragmentPath = "lightingFragmentShader.in"; const char* vertexPath2 = "lightingCubeVertexShader.in"; const char* fragmentPath2 = "lightingCubeFragmentShader.in"; Shader lightingShader(vertexPath,fragmentPath); Shader lightingCubeShader(vertexPath2, fragmentPath2); glEnable(GL_DEPTH_TEST); float vertices[] = { // positions // normals // texture coords -0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f, 0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 1.0f, 0.0f, 0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f, 0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f, -0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 0.0f, 1.0f, -0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f, -0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, 0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, 0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, -0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, -0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, -0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f, -0.5f, 0.5f, -0.5f, -1.0f, 0.0f, 0.0f, 1.0f, 1.0f, -0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f, -0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f, -0.5f, -0.5f, 0.5f, -1.0f, 0.0f, 0.0f, 0.0f, 0.0f, -0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.5f, 0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.5f, -0.5f, 0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, -0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f, 0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f, 1.0f, 1.0f, 0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f, 0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f, -0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f, 0.0f, 0.0f, -0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f, -0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, -0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, -0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f }; glm::vec3 cubePositions[] = { glm::vec3(0.0f, 0.0f, 0.0f), glm::vec3(2.0f, 5.0f, -15.0f), glm::vec3(-1.5f, -2.2f, -2.5f), glm::vec3(-3.8f, -2.0f, -12.3f), glm::vec3(2.4f, -0.4f, -3.5f), glm::vec3(-1.7f, 3.0f, -7.5f), glm::vec3(1.3f, -2.0f, -2.5f), glm::vec3(1.5f, 2.0f, -2.5f), glm::vec3(1.5f, 0.2f, -1.5f), glm::vec3(-1.3f, 1.0f, -1.5f) }; glm::vec3 pointLightPositions[] = { glm::vec3(0.7f, 0.2f, 2.0f), glm::vec3(2.3f, -3.3f, -4.0f), glm::vec3(-4.0f, 2.0f, -12.0f), glm::vec3(0.0f, 0.0f, -3.0f) }; unsigned int VBO, cubeVAO; glGenVertexArrays(1, &cubeVAO); glGenBuffers(1, &VBO); glBindBuffer(GL_ARRAY_BUFFER, VBO); glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW); glBindVertexArray(cubeVAO); 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); unsigned int lightCubeVAO; glGenVertexArrays(1, &lightCubeVAO); glBindVertexArray(lightCubeVAO); glBindBuffer(GL_ARRAY_BUFFER, VBO); glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)0); glEnableVertexAttribArray(0); unsigned int diffuseMap = loadTexture("container2.png"); unsigned int specularMap = loadTexture("container2_specular.png"); lightingShader.useShader(); lightingShader.setInt("material.diffuse", 0); lightingShader.setInt("material.specular", 1); while (!glfwWindowShouldClose(window)) //渲染循环 { float currentFrame = static_cast<float>(glfwGetTime()); deltaTime = currentFrame - lastFrame; lastFrame = currentFrame; processInput(window); glClearColor(0.1f, 0.1f, 0.1f, 1.0f); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); lightingShader.useShader(); lightingShader.setFloat("material.shininess", 32.0f); lightingShader.setVec3("viewPos", camera.Position); // light properties // directional light lightingShader.setVec3("dirLight.direction", -0.2f, -1.0f, -0.3f); lightingShader.setVec3("dirLight.ambient", 0.05f, 0.05f, 0.05f); lightingShader.setVec3("dirLight.diffuse", 0.4f, 0.4f, 0.4f); lightingShader.setVec3("dirLight.specular", 0.5f, 0.5f, 0.5f); // point light 1 lightingShader.setVec3("pointLights[0].position", pointLightPositions[0]); lightingShader.setVec3("pointLights[0].ambient", 0.05f, 0.05f, 0.05f); lightingShader.setVec3("pointLights[0].diffuse", 0.8f, 0.8f, 0.8f); lightingShader.setVec3("pointLights[0].specular", 1.0f, 1.0f, 1.0f); lightingShader.setFloat("pointLights[0].constant", 1.0f); lightingShader.setFloat("pointLights[0].linear", 0.09f); lightingShader.setFloat("pointLights[0].quadratic", 0.032f); // point light 2 lightingShader.setVec3("pointLights[1].position", pointLightPositions[1]); lightingShader.setVec3("pointLights[1].ambient", 0.05f, 0.05f, 0.05f); lightingShader.setVec3("pointLights[1].diffuse", 0.8f, 0.8f, 0.8f); lightingShader.setVec3("pointLights[1].specular", 1.0f, 1.0f, 1.0f); lightingShader.setFloat("pointLights[1].constant", 1.0f); lightingShader.setFloat("pointLights[1].linear", 0.09f); lightingShader.setFloat("pointLights[1].quadratic", 0.032f); // point light 3 lightingShader.setVec3("pointLights[2].position", pointLightPositions[2]); lightingShader.setVec3("pointLights[2].ambient", 0.05f, 0.05f, 0.05f); lightingShader.setVec3("pointLights[2].diffuse", 0.8f, 0.8f, 0.8f); lightingShader.setVec3("pointLights[2].specular", 1.0f, 1.0f, 1.0f); lightingShader.setFloat("pointLights[2].constant", 1.0f); lightingShader.setFloat("pointLights[2].linear", 0.09f); lightingShader.setFloat("pointLights[2].quadratic", 0.032f); // point light 4 lightingShader.setVec3("pointLights[3].position", pointLightPositions[3]); lightingShader.setVec3("pointLights[3].ambient", 0.05f, 0.05f, 0.05f); lightingShader.setVec3("pointLights[3].diffuse", 0.8f, 0.8f, 0.8f); lightingShader.setVec3("pointLights[3].specular", 1.0f, 1.0f, 1.0f); lightingShader.setFloat("pointLights[3].constant", 1.0f); lightingShader.setFloat("pointLights[3].linear", 0.09f); lightingShader.setFloat("pointLights[3].quadratic", 0.032f); // spotLight lightingShader.setVec3("spotLight.position", camera.Position); lightingShader.setVec3("spotLight.direction", camera.Front); lightingShader.setVec3("spotLight.ambient", 0.0f, 0.0f, 0.0f); lightingShader.setVec3("spotLight.diffuse", 1.0f, 1.0f, 1.0f); lightingShader.setVec3("spotLight.specular", 1.0f, 1.0f, 1.0f); lightingShader.setFloat("spotLight.constant", 1.0f); lightingShader.setFloat("spotLight.linear", 0.09f); lightingShader.setFloat("spotLight.quadratic", 0.032f); lightingShader.setFloat("spotLight.cutOff", glm::cos(glm::radians(12.5f))); lightingShader.setFloat("spotLight.outerCutOff", glm::cos(glm::radians(15.0f))); glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), (float)800 / (float)600, 0.1f, 100.0f); glm::mat4 view = camera.GetViewMatrix(); lightingShader.setMat4("projection", projection); lightingShader.setMat4("view", view); glm::mat4 model = glm::mat4(1.0f); lightingShader.setMat4("model", model); glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_2D, diffuseMap); glActiveTexture(GL_TEXTURE1); glBindTexture(GL_TEXTURE_2D, specularMap); glBindVertexArray(cubeVAO); for (unsigned int i = 0; i < 10; i++) { glm::mat4 model = glm::mat4(1.0f); model = glm::translate(model, cubePositions[i]); float angle = 20.0f * i; model = glm::rotate(model, glm::radians(angle), glm::vec3(1.0f, 0.3f, 0.5f)); lightingShader.setMat4("model", model); glDrawArrays(GL_TRIANGLES, 0, 36); } lightingCubeShader.useShader(); lightingCubeShader.setMat4("projection", projection); lightingCubeShader.setMat4("view", view); glBindVertexArray(lightCubeVAO); for (unsigned int i = 0; i < 4; i++) { model = glm::mat4(1.0f); model = glm::translate(model, pointLightPositions[i]); model = glm::scale(model, glm::vec3(0.2f)); lightingCubeShader.setMat4("model", model); glDrawArrays(GL_TRIANGLES, 0, 36); } glfwSwapBuffers(window); glfwPollEvents(); } glDeleteVertexArrays(1, &cubeVAO); glDeleteVertexArrays(1, &lightCubeVAO); glDeleteBuffers(1, &VBO); glfwTerminate(); return 0; }
Source.cpp
#version 330 core out vec4 FragColor; void main() { FragColor = vec4(1.0); // set alle 4 vector values to 1.0 }
lightingCubeFragmentShader.in
#version 330 core layout (location = 0) in vec3 aPos; uniform mat4 model; uniform mat4 view; uniform mat4 projection; void main() { gl_Position = projection * view * model * vec4(aPos, 1.0); }
lightingCubeVertexShader.in
#version 330 core out vec4 FragColor; struct Material { sampler2D diffuse; sampler2D specular; float shininess; }; struct DirLight { vec3 direction; vec3 ambient; vec3 diffuse; vec3 specular; }; struct PointLight { vec3 position; float constant; float linear; float quadratic; vec3 ambient; vec3 diffuse; vec3 specular; }; struct SpotLight { vec3 position; vec3 direction; float cutOff; float outerCutOff; float constant; float linear; float quadratic; vec3 ambient; vec3 diffuse; vec3 specular; }; #define NR_POINT_LIGHTS 4 in vec3 FragPos; in vec3 Normal; in vec2 TexCoords; uniform vec3 viewPos; uniform DirLight dirLight; uniform PointLight pointLights[NR_POINT_LIGHTS]; uniform SpotLight spotLight; uniform Material material; // function prototypes vec3 CalcDirLight(DirLight light, vec3 normal, vec3 viewDir); vec3 CalcPointLight(PointLight light, vec3 normal, vec3 fragPos, vec3 viewDir); vec3 CalcSpotLight(SpotLight light, vec3 normal, vec3 fragPos, vec3 viewDir); void main() { // properties vec3 norm = normalize(Normal); vec3 viewDir = normalize(viewPos - FragPos); vec3 result = CalcDirLight(dirLight, norm, viewDir); // phase 2: point lights for(int i = 0; i < NR_POINT_LIGHTS; i++) result += CalcPointLight(pointLights[i], norm, FragPos, viewDir); // phase 3: spot light result += CalcSpotLight(spotLight, norm, FragPos, viewDir); FragColor = vec4(result, 1.0); } // calculates the color when using a directional light. vec3 CalcDirLight(DirLight light, vec3 normal, vec3 viewDir) { vec3 lightDir = normalize(-light.direction); // diffuse shading float diff = max(dot(normal, lightDir), 0.0); // specular shading vec3 reflectDir = reflect(-lightDir, normal); float spec = pow(max(dot(viewDir, reflectDir), 0.0), material.shininess); // combine results vec3 ambient = light.ambient * vec3(texture(material.diffuse, TexCoords)); vec3 diffuse = light.diffuse * diff * vec3(texture(material.diffuse, TexCoords)); vec3 specular = light.specular * spec * vec3(texture(material.specular, TexCoords)); return (ambient + diffuse + specular); } // calculates the color when using a point light. vec3 CalcPointLight(PointLight light, vec3 normal, vec3 fragPos, vec3 viewDir) { vec3 lightDir = normalize(light.position - fragPos); // diffuse shading float diff = max(dot(normal, lightDir), 0.0); // specular shading vec3 reflectDir = reflect(-lightDir, normal); float spec = pow(max(dot(viewDir, reflectDir), 0.0), material.shininess); // attenuation float distance = length(light.position - fragPos); float attenuation = 1.0 / (light.constant + light.linear * distance + light.quadratic * (distance * distance)); // combine results vec3 ambient = light.ambient * vec3(texture(material.diffuse, TexCoords)); vec3 diffuse = light.diffuse * diff * vec3(texture(material.diffuse, TexCoords)); vec3 specular = light.specular * spec * vec3(texture(material.specular, TexCoords)); ambient *= attenuation; diffuse *= attenuation; specular *= attenuation; return (ambient + diffuse + specular); } // calculates the color when using a spot light. vec3 CalcSpotLight(SpotLight light, vec3 normal, vec3 fragPos, vec3 viewDir) { vec3 lightDir = normalize(light.position - fragPos); // diffuse shading float diff = max(dot(normal, lightDir), 0.0); // specular shading vec3 reflectDir = reflect(-lightDir, normal); float spec = pow(max(dot(viewDir, reflectDir), 0.0), material.shininess); // attenuation float distance = length(light.position - fragPos); float attenuation = 1.0 / (light.constant + light.linear * distance + light.quadratic * (distance * distance)); // spotlight intensity float theta = dot(lightDir, normalize(-light.direction)); float epsilon = light.cutOff - light.outerCutOff; float intensity = clamp((theta - light.outerCutOff) / epsilon, 0.0, 1.0); // combine results vec3 ambient = light.ambient * vec3(texture(material.diffuse, TexCoords)); vec3 diffuse = light.diffuse * diff * vec3(texture(material.diffuse, TexCoords)); vec3 specular = light.specular * spec * vec3(texture(material.specular, TexCoords)); ambient *= attenuation * intensity; diffuse *= attenuation * intensity; specular *= attenuation * intensity; return (ambient + diffuse + specular); }
lightingFragmentShader.in
#version 330 core layout (location = 0) in vec3 aPos; layout (location = 1) in vec3 aNormal; layout (location = 2) in vec2 aTexCoords; out vec3 FragPos; out vec3 Normal; out vec2 TexCoords; uniform mat4 model; uniform mat4 view; uniform mat4 projection; void main() { FragPos = vec3(model * vec4(aPos, 1.0)); Normal = mat3(transpose(inverse(model))) * aNormal; TexCoords = aTexCoords; gl_Position = projection * view * vec4(FragPos, 1.0); }
lightingVertexShader.in