433 lines
15 KiB
C++
433 lines
15 KiB
C++
#include <glad/glad.h>
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#include <GLFW/glfw3.h>
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#include <stb_image.h>
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#define STB_IMAGE_IMPLEMENTATION // dodane do pliku z kursu
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#include <glm/glm.hpp>
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#include <glm/gtc/matrix_transform.hpp>
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#include <glm/gtc/type_ptr.hpp>
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#include <learnopengl/filesystem.h>
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#include <learnopengl/shader_m.h>
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#include <learnopengl/camera.h>
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#include <learnopengl/model.h>
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#include <iostream>
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void framebuffer_size_callback(GLFWwindow* window, int width, int height);
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void mouse_callback(GLFWwindow* window, double xpos, double ypos);
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void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
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void processInput(GLFWwindow *window);
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unsigned int loadTexture(const char *path);
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unsigned int loadCubemap(vector<std::string> faces);
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// settings
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const unsigned int SCR_WIDTH = 800;
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const unsigned int SCR_HEIGHT = 600;
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// camera
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Camera camera(glm::vec3(0.0f, 0.0f, 3.0f));
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float lastX = (float)SCR_WIDTH / 2.0;
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float lastY = (float)SCR_HEIGHT / 2.0;
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bool firstMouse = true;
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// timing
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float deltaTime = 0.0f;
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float lastFrame = 0.0f;
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//
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float angle = 0;
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int main()
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{
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// glfw: initialize and configure
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// ------------------------------
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glfwInit();
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glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
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glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
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glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
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#ifdef __APPLE__
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glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
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#endif
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// glfw window creation
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// --------------------
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GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
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if (window == NULL)
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{
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std::cout << "Failed to create GLFW window" << std::endl;
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glfwTerminate();
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return -1;
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}
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glfwMakeContextCurrent(window);
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glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
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glfwSetCursorPosCallback(window, mouse_callback);
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glfwSetScrollCallback(window, scroll_callback);
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// tell GLFW to capture our mouse
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glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
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// glad: load all OpenGL function pointers
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// ---------------------------------------
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if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))
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{
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std::cout << "Failed to initialize GLAD" << std::endl;
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return -1;
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}
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// configure global opengl state
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// -----------------------------
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glEnable(GL_DEPTH_TEST);
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// build and compile shaders
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// -------------------------
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Shader shader("6.2.cubemaps.vert", "6.2.cubemaps.frag");
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Shader skyboxShader("6.2.skybox.vert", "6.2.skybox.frag");
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// set up vertex data (and buffer(s)) and configure vertex attributes
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// ------------------------------------------------------------------
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float cubeVertices[] = {
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// positions // normals
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-0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
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0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
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0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
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0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
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-0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
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-0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
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-0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
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0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
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0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
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0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
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-0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
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-0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
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-0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f,
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-0.5f, 0.5f, -0.5f, -1.0f, 0.0f, 0.0f,
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-0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f,
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-0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f,
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-0.5f, -0.5f, 0.5f, -1.0f, 0.0f, 0.0f,
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-0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f,
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0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f,
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0.5f, 0.5f, -0.5f, 1.0f, 0.0f, 0.0f,
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0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f,
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0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f,
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0.5f, -0.5f, 0.5f, 1.0f, 0.0f, 0.0f,
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0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f,
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-0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f,
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0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f,
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0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f,
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0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f,
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-0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f,
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-0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f,
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-0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f,
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0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f,
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0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f,
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0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f,
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-0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f,
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-0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f
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};
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float skyboxVertices[] = {
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// positions
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-1.0f, 1.0f, -1.0f,
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-1.0f, -1.0f, -1.0f,
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1.0f, -1.0f, -1.0f,
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1.0f, -1.0f, -1.0f,
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1.0f, 1.0f, -1.0f,
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-1.0f, 1.0f, -1.0f,
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-1.0f, -1.0f, 1.0f,
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-1.0f, -1.0f, -1.0f,
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-1.0f, 1.0f, -1.0f,
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-1.0f, 1.0f, -1.0f,
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-1.0f, 1.0f, 1.0f,
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-1.0f, -1.0f, 1.0f,
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1.0f, -1.0f, -1.0f,
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1.0f, -1.0f, 1.0f,
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1.0f, 1.0f, 1.0f,
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1.0f, 1.0f, 1.0f,
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1.0f, 1.0f, -1.0f,
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1.0f, -1.0f, -1.0f,
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-1.0f, -1.0f, 1.0f,
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-1.0f, 1.0f, 1.0f,
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1.0f, 1.0f, 1.0f,
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1.0f, 1.0f, 1.0f,
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1.0f, -1.0f, 1.0f,
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-1.0f, -1.0f, 1.0f,
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-1.0f, 1.0f, -1.0f,
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1.0f, 1.0f, -1.0f,
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1.0f, 1.0f, 1.0f,
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1.0f, 1.0f, 1.0f,
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-1.0f, 1.0f, 1.0f,
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-1.0f, 1.0f, -1.0f,
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-1.0f, -1.0f, -1.0f,
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-1.0f, -1.0f, 1.0f,
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1.0f, -1.0f, -1.0f,
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1.0f, -1.0f, -1.0f,
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-1.0f, -1.0f, 1.0f,
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1.0f, -1.0f, 1.0f
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};
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// cube VAO
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unsigned int cubeVAO, cubeVBO;
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glGenVertexArrays(1, &cubeVAO);
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glGenBuffers(1, &cubeVBO);
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glBindVertexArray(cubeVAO);
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glBindBuffer(GL_ARRAY_BUFFER, cubeVBO);
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glBufferData(GL_ARRAY_BUFFER, sizeof(cubeVertices), &cubeVertices, GL_STATIC_DRAW);
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glEnableVertexAttribArray(0);
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glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)0);
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glEnableVertexAttribArray(1);
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glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)(3 * sizeof(float)));
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// skybox VAO
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unsigned int skyboxVAO, skyboxVBO;
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glGenVertexArrays(1, &skyboxVAO);
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glGenBuffers(1, &skyboxVBO);
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glBindVertexArray(skyboxVAO);
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glBindBuffer(GL_ARRAY_BUFFER, skyboxVBO);
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glBufferData(GL_ARRAY_BUFFER, sizeof(skyboxVertices), &skyboxVertices, GL_STATIC_DRAW);
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glEnableVertexAttribArray(0);
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glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0);
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// load textures
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// -------------
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string dir = "../resources/textures/SaintsPetersBasilica/";
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vector<std::string> faces
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{
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dir + "posx.jpg",
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dir + "negx.jpg",
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dir + "posy.jpg",
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dir + "negy.jpg",
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dir + "posz.jpg",
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dir + "negz.jpg"
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};
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unsigned int cubemapTexture = loadCubemap(faces);
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// shader configuration
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// --------------------
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shader.use();
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shader.setInt("skybox", 0);
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skyboxShader.use();
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skyboxShader.setInt("skybox", 0);
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// render loop
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// -----------
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while (!glfwWindowShouldClose(window))
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{
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// per-frame time logic
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// --------------------
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float currentFrame = glfwGetTime();
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deltaTime = currentFrame - lastFrame;
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lastFrame = currentFrame;
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angle += deltaTime;
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// input
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// -----
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processInput(window);
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// render
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// ------
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glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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// draw scene as normal
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shader.use();
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glm::mat4 model = glm::mat4(1.0f);
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model = glm::rotate(model, angle/10.f, glm::vec3(0, 1, 0));
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glm::mat4 view = camera.GetViewMatrix();
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glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
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shader.setMat4("model", model);
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shader.setMat4("view", view);
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shader.setMat4("projection", projection);
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shader.setVec3("cameraPos", camera.Position);
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// cubes
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glBindVertexArray(cubeVAO);
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_CUBE_MAP, cubemapTexture);
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glDrawArrays(GL_TRIANGLES, 0, 36);
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model = glm::mat4(1.0f);
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model = glm::rotate(model, angle, glm::vec3(0, 1, 0));
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model = glm::translate(model, glm::vec3(5, 0, 0));
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model = glm::rotate(model, -angle, glm::vec3(0, 1, 0));
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model = glm::translate(model, glm::vec3(0, -5, 0));
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shader.setMat4("model", model);
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glDrawArrays(GL_TRIANGLES, 0, 36);
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glBindVertexArray(0);
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// draw skybox as last
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glDepthFunc(GL_LEQUAL); // change depth function so depth test passes when values are equal to depth buffer's content
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skyboxShader.use();
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view = glm::mat4(glm::mat3(camera.GetViewMatrix())); // remove translation from the view matrix
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skyboxShader.setMat4("view", view);
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skyboxShader.setMat4("projection", projection);
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// skybox cube
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glBindVertexArray(skyboxVAO);
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_CUBE_MAP, cubemapTexture);
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glDrawArrays(GL_TRIANGLES, 0, 36);
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glBindVertexArray(0);
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glDepthFunc(GL_LESS); // set depth function back to default
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// glfw: swap buffers and poll IO events (keys pressed/released, mouse moved etc.)
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// -------------------------------------------------------------------------------
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glfwSwapBuffers(window);
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glfwPollEvents();
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}
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// optional: de-allocate all resources once they've outlived their purpose:
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// ------------------------------------------------------------------------
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glDeleteVertexArrays(1, &cubeVAO);
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glDeleteVertexArrays(1, &skyboxVAO);
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glDeleteBuffers(1, &cubeVBO);
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glDeleteBuffers(1, &skyboxVAO);
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glfwTerminate();
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return 0;
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}
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// process all input: query GLFW whether relevant keys are pressed/released this frame and react accordingly
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// ---------------------------------------------------------------------------------------------------------
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void processInput(GLFWwindow *window)
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{
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if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
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glfwSetWindowShouldClose(window, true);
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if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
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camera.ProcessKeyboard(FORWARD, deltaTime);
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if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)
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camera.ProcessKeyboard(BACKWARD, deltaTime);
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if (glfwGetKey(window, GLFW_KEY_A) == GLFW_PRESS)
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camera.ProcessKeyboard(LEFT, deltaTime);
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if (glfwGetKey(window, GLFW_KEY_D) == GLFW_PRESS)
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camera.ProcessKeyboard(RIGHT, deltaTime);
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}
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// glfw: whenever the window size changed (by OS or user resize) this callback function executes
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// ---------------------------------------------------------------------------------------------
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void framebuffer_size_callback(GLFWwindow* window, int width, int height)
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{
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// make sure the viewport matches the new window dimensions; note that width and
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// height will be significantly larger than specified on retina displays.
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glViewport(0, 0, width, height);
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}
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// glfw: whenever the mouse moves, this callback is called
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// -------------------------------------------------------
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void mouse_callback(GLFWwindow* window, double xpos, double ypos)
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{
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if (firstMouse)
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{
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lastX = xpos;
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lastY = ypos;
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firstMouse = false;
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}
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float xoffset = xpos - lastX;
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float yoffset = lastY - ypos; // reversed since y-coordinates go from bottom to top
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lastX = xpos;
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lastY = ypos;
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camera.ProcessMouseMovement(xoffset, yoffset);
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}
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// glfw: whenever the mouse scroll wheel scrolls, this callback is called
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// ----------------------------------------------------------------------
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void scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
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{
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camera.ProcessMouseScroll(yoffset);
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}
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// utility function for loading a 2D texture from file
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// ---------------------------------------------------
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unsigned int loadTexture(char const * path)
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{
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unsigned int textureID;
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glGenTextures(1, &textureID);
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int width, height, nrComponents;
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unsigned char *data = stbi_load(path, &width, &height, &nrComponents, 0);
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if (data)
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{
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GLenum format;
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if (nrComponents == 1)
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format = GL_RED;
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else if (nrComponents == 3)
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format = GL_RGB;
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else if (nrComponents == 4)
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format = GL_RGBA;
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glBindTexture(GL_TEXTURE_2D, textureID);
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glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, format, GL_UNSIGNED_BYTE, data);
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glGenerateMipmap(GL_TEXTURE_2D);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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stbi_image_free(data);
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}
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else
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{
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std::cout << "Texture failed to load at path: " << path << std::endl;
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stbi_image_free(data);
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}
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return textureID;
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}
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// loads a cubemap texture from 6 individual texture faces
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// order:
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// +X (right)
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// -X (left)
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// +Y (top)
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// -Y (bottom)
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// +Z (front)
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// -Z (back)
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// -------------------------------------------------------
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unsigned int loadCubemap(vector<std::string> faces)
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{
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unsigned int textureID;
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glGenTextures(1, &textureID);
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glBindTexture(GL_TEXTURE_CUBE_MAP, textureID);
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int width, height, nrComponents;
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for (unsigned int i = 0; i < faces.size(); i++)
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{
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unsigned char *data = stbi_load(faces[i].c_str(), &width, &height, &nrComponents, 0);
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if (data)
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{
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glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);
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stbi_image_free(data);
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}
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else
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{
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std::cout << "Cubemap texture failed to load at path: " << faces[i] << std::endl;
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stbi_image_free(data);
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}
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}
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glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
|
|
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
|
|
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
|
|
|
|
return textureID;
|
|
}
|