mirror of
https://github.com/JoeyDeVries/LearnOpenGL.git
synced 2026-01-30 20:13:22 +08:00
Code re-work: Advanced OpenGL
This commit is contained in:
Joey de Vries
@@ -1,356 +1,312 @@
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// Std. Includes
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#include <string>
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#include <algorithm>
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using namespace std;
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// GLEW
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#define GLEW_STATIC
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#include <GL/glew.h>
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// GLFW
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#include <glad/glad.h>
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#include <GLFW/glfw3.h>
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#include <stb_image.h>
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// GL includes
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#include <learnopengl/shader.h>
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#include <learnopengl/camera.h>
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// GLM Mathemtics
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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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// Other Libs
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#include <SOIL.h>
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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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// Properties
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GLuint screenWidth = 800, screenHeight = 600;
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#include <iostream>
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// Function prototypes
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void key_callback(GLFWwindow* window, int key, int scancode, int action, int mode);
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void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
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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 Do_Movement();
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GLuint loadTexture(GLchar const * path);
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GLuint loadCubemap(std::vector<std::string> faces);
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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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// Camera
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// settings
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const unsigned int SCR_WIDTH = 1280;
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const unsigned int SCR_HEIGHT = 720;
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// camera
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Camera camera(glm::vec3(0.0f, 0.0f, 3.0f));
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bool keys[1024];
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GLfloat lastX = 400, lastY = 300;
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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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GLfloat deltaTime = 0.0f;
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GLfloat lastFrame = 0.0f;
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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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// The MAIN function, from here we start our application and run our Game loop
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int main()
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{
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// Init GLFW
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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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glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
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GLFWwindow* window = glfwCreateWindow(screenWidth, screenHeight, "LearnOpenGL", nullptr, nullptr); // Windowed
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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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glfwMakeContextCurrent(window);
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// Set the required callback functions
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glfwSetKeyCallback(window, key_callback);
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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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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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// Options
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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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// Initialize GLEW to setup the OpenGL Function pointers
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glewExperimental = GL_TRUE;
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glewInit();
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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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// Define the viewport dimensions
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glViewport(0, 0, screenWidth, screenHeight);
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// Setup some OpenGL options
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// configure global opengl state
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// -----------------------------
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glEnable(GL_DEPTH_TEST);
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glDepthFunc(GL_LESS);
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// Setup and compile our shaders
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Shader shader("cubemaps.vs", "cubemaps.frag");
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Shader skyboxShader("skybox.vs", "skybox.frag");
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// build and compile shaders
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// -------------------------
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Shader shader("6.1.cubemaps.vs", "6.1.cubemaps.fs");
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Shader skyboxShader("6.1.skybox.vs", "6.1.skybox.fs");
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#pragma region "object_initialization"
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// Set the object data (buffers, vertex attributes)
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GLfloat 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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// 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 // texture Coords
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-0.5f, -0.5f, -0.5f, 0.0f, 0.0f,
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0.5f, -0.5f, -0.5f, 1.0f, 0.0f,
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0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
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0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
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-0.5f, 0.5f, -0.5f, 0.0f, 1.0f,
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-0.5f, -0.5f, -0.5f, 0.0f, 0.0f,
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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,
|
||||
0.5f, -0.5f, 0.5f, 1.0f, 0.0f,
|
||||
0.5f, 0.5f, 0.5f, 1.0f, 1.0f,
|
||||
0.5f, 0.5f, 0.5f, 1.0f, 1.0f,
|
||||
-0.5f, 0.5f, 0.5f, 0.0f, 1.0f,
|
||||
-0.5f, -0.5f, 0.5f, 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, -1.0f, 0.0f, 0.0f,
|
||||
-0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
|
||||
-0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
|
||||
-0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
|
||||
-0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
|
||||
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
|
||||
-0.5f, 0.5f, 0.5f, 1.0f, 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, 1.0f, 0.0f, 0.0f,
|
||||
0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
|
||||
0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
|
||||
0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
|
||||
0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
|
||||
0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
|
||||
0.5f, 0.5f, 0.5f, 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, -1.0f, 0.0f,
|
||||
-0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
|
||||
0.5f, -0.5f, -0.5f, 1.0f, 1.0f,
|
||||
0.5f, -0.5f, 0.5f, 1.0f, 0.0f,
|
||||
0.5f, -0.5f, 0.5f, 1.0f, 0.0f,
|
||||
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
|
||||
-0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
|
||||
|
||||
-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, 1.0f,
|
||||
0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
|
||||
0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
|
||||
0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
|
||||
-0.5f, 0.5f, 0.5f, 0.0f, 0.0f,
|
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-0.5f, 0.5f, -0.5f, 0.0f, 1.0f
|
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};
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GLfloat skyboxVertices[] = {
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// Positions
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-1.0f, 1.0f, -1.0f,
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float skyboxVertices[] = {
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// positions
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-1.0f, 1.0f, -1.0f,
|
||||
-1.0f, -1.0f, -1.0f,
|
||||
1.0f, -1.0f, -1.0f,
|
||||
1.0f, -1.0f, -1.0f,
|
||||
1.0f, 1.0f, -1.0f,
|
||||
-1.0f, 1.0f, -1.0f,
|
||||
1.0f, -1.0f, -1.0f,
|
||||
1.0f, -1.0f, -1.0f,
|
||||
1.0f, 1.0f, -1.0f,
|
||||
-1.0f, 1.0f, -1.0f,
|
||||
|
||||
-1.0f, -1.0f, 1.0f,
|
||||
-1.0f, -1.0f, 1.0f,
|
||||
-1.0f, -1.0f, -1.0f,
|
||||
-1.0f, 1.0f, -1.0f,
|
||||
-1.0f, 1.0f, -1.0f,
|
||||
-1.0f, 1.0f, 1.0f,
|
||||
-1.0f, -1.0f, 1.0f,
|
||||
-1.0f, 1.0f, -1.0f,
|
||||
-1.0f, 1.0f, -1.0f,
|
||||
-1.0f, 1.0f, 1.0f,
|
||||
-1.0f, -1.0f, 1.0f,
|
||||
|
||||
1.0f, -1.0f, -1.0f,
|
||||
1.0f, -1.0f, 1.0f,
|
||||
1.0f, 1.0f, 1.0f,
|
||||
1.0f, 1.0f, 1.0f,
|
||||
1.0f, 1.0f, -1.0f,
|
||||
1.0f, -1.0f, -1.0f,
|
||||
1.0f, -1.0f, -1.0f,
|
||||
1.0f, -1.0f, 1.0f,
|
||||
1.0f, 1.0f, 1.0f,
|
||||
1.0f, 1.0f, 1.0f,
|
||||
1.0f, 1.0f, -1.0f,
|
||||
1.0f, -1.0f, -1.0f,
|
||||
|
||||
-1.0f, -1.0f, 1.0f,
|
||||
-1.0f, 1.0f, 1.0f,
|
||||
1.0f, 1.0f, 1.0f,
|
||||
1.0f, 1.0f, 1.0f,
|
||||
1.0f, -1.0f, 1.0f,
|
||||
-1.0f, -1.0f, 1.0f,
|
||||
-1.0f, -1.0f, 1.0f,
|
||||
-1.0f, 1.0f, 1.0f,
|
||||
1.0f, 1.0f, 1.0f,
|
||||
1.0f, 1.0f, 1.0f,
|
||||
1.0f, -1.0f, 1.0f,
|
||||
-1.0f, -1.0f, 1.0f,
|
||||
|
||||
-1.0f, 1.0f, -1.0f,
|
||||
1.0f, 1.0f, -1.0f,
|
||||
1.0f, 1.0f, 1.0f,
|
||||
1.0f, 1.0f, 1.0f,
|
||||
-1.0f, 1.0f, 1.0f,
|
||||
-1.0f, 1.0f, -1.0f,
|
||||
-1.0f, 1.0f, -1.0f,
|
||||
1.0f, 1.0f, -1.0f,
|
||||
1.0f, 1.0f, 1.0f,
|
||||
1.0f, 1.0f, 1.0f,
|
||||
-1.0f, 1.0f, 1.0f,
|
||||
-1.0f, 1.0f, -1.0f,
|
||||
|
||||
-1.0f, -1.0f, -1.0f,
|
||||
-1.0f, -1.0f, 1.0f,
|
||||
1.0f, -1.0f, -1.0f,
|
||||
1.0f, -1.0f, -1.0f,
|
||||
-1.0f, -1.0f, 1.0f,
|
||||
1.0f, -1.0f, 1.0f
|
||||
-1.0f, -1.0f, 1.0f,
|
||||
1.0f, -1.0f, -1.0f,
|
||||
1.0f, -1.0f, -1.0f,
|
||||
-1.0f, -1.0f, 1.0f,
|
||||
1.0f, -1.0f, 1.0f
|
||||
};
|
||||
|
||||
// Setup cube VAO
|
||||
GLuint cubeVAO, cubeVBO;
|
||||
// cube VAO
|
||||
unsigned int cubeVAO, cubeVBO;
|
||||
glGenVertexArrays(1, &cubeVAO);
|
||||
glGenBuffers(1, &cubeVBO);
|
||||
glBindVertexArray(cubeVAO);
|
||||
glBindBuffer(GL_ARRAY_BUFFER, cubeVBO);
|
||||
glBufferData(GL_ARRAY_BUFFER, sizeof(cubeVertices), &cubeVertices, GL_STATIC_DRAW);
|
||||
glEnableVertexAttribArray(0);
|
||||
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat), (GLvoid*)0);
|
||||
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void*)0);
|
||||
glEnableVertexAttribArray(1);
|
||||
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
|
||||
glBindVertexArray(0);
|
||||
// Setup skybox VAO
|
||||
GLuint skyboxVAO, skyboxVBO;
|
||||
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void*)(3 * sizeof(float)));
|
||||
// skybox VAO
|
||||
unsigned int skyboxVAO, skyboxVBO;
|
||||
glGenVertexArrays(1, &skyboxVAO);
|
||||
glGenBuffers(1, &skyboxVBO);
|
||||
glBindVertexArray(skyboxVAO);
|
||||
glBindBuffer(GL_ARRAY_BUFFER, skyboxVBO);
|
||||
glBufferData(GL_ARRAY_BUFFER, sizeof(skyboxVertices), &skyboxVertices, GL_STATIC_DRAW);
|
||||
glEnableVertexAttribArray(0);
|
||||
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(GLfloat), (GLvoid*)0);
|
||||
glBindVertexArray(0);
|
||||
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0);
|
||||
|
||||
#pragma endregion
|
||||
// load textures
|
||||
// -------------
|
||||
unsigned int cubeTexture = loadTexture(FileSystem::getPath("resources/textures/marble.jpg").c_str());
|
||||
|
||||
// Cubemap (Skybox)
|
||||
std::vector<std::string> faces;
|
||||
faces.push_back(FileSystem::getPath("resources/textures/skybox/right.jpg"));
|
||||
faces.push_back(FileSystem::getPath("resources/textures/skybox/left.jpg"));
|
||||
faces.push_back(FileSystem::getPath("resources/textures/skybox/top.jpg"));
|
||||
faces.push_back(FileSystem::getPath("resources/textures/skybox/bottom.jpg"));
|
||||
faces.push_back(FileSystem::getPath("resources/textures/skybox/back.jpg"));
|
||||
faces.push_back(FileSystem::getPath("resources/textures/skybox/front.jpg"));
|
||||
GLuint skyboxTexture = loadCubemap(faces);
|
||||
vector<std::string> faces
|
||||
{
|
||||
FileSystem::getPath("resources/textures/skybox/right.jpg"),
|
||||
FileSystem::getPath("resources/textures/skybox/left.jpg"),
|
||||
FileSystem::getPath("resources/textures/skybox/top.jpg"),
|
||||
FileSystem::getPath("resources/textures/skybox/bottom.jpg"),
|
||||
FileSystem::getPath("resources/textures/skybox/back.jpg"),
|
||||
FileSystem::getPath("resources/textures/skybox/front.jpg")
|
||||
};
|
||||
unsigned int cubemapTexture = loadCubemap(faces);
|
||||
|
||||
// Draw as wireframe
|
||||
//glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
|
||||
// shader configuration
|
||||
// --------------------
|
||||
shader.use();
|
||||
shader.setInt("texture1", 0);
|
||||
|
||||
// Game loop
|
||||
skyboxShader.use();
|
||||
skyboxShader.setInt("skybox", 0);
|
||||
|
||||
// render loop
|
||||
// -----------
|
||||
while (!glfwWindowShouldClose(window))
|
||||
{
|
||||
// Set frame time
|
||||
GLfloat currentFrame = glfwGetTime();
|
||||
// per-frame time logic
|
||||
// --------------------
|
||||
float currentFrame = glfwGetTime();
|
||||
deltaTime = currentFrame - lastFrame;
|
||||
lastFrame = currentFrame;
|
||||
|
||||
// Check and call events
|
||||
glfwPollEvents();
|
||||
Do_Movement();
|
||||
// input
|
||||
// -----
|
||||
processInput(window);
|
||||
|
||||
// Clear buffers
|
||||
// render
|
||||
// ------
|
||||
glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
|
||||
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
||||
|
||||
|
||||
// Draw scene as normal
|
||||
shader.Use();
|
||||
// draw scene as normal
|
||||
shader.use();
|
||||
glm::mat4 model;
|
||||
glm::mat4 view = camera.GetViewMatrix();
|
||||
glm::mat4 projection = glm::perspective(camera.Zoom, (float)screenWidth / (float)screenHeight, 0.1f, 100.0f);
|
||||
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "model"), 1, GL_FALSE, glm::value_ptr(model));
|
||||
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "view"), 1, GL_FALSE, glm::value_ptr(view));
|
||||
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "projection"), 1, GL_FALSE, glm::value_ptr(projection));
|
||||
glUniform3f(glGetUniformLocation(shader.Program, "cameraPos"), camera.Position.x, camera.Position.y, camera.Position.z);
|
||||
// Cubes
|
||||
glm::mat4 projection = glm::perspective(camera.Zoom, (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
|
||||
shader.setMat4("model", model);
|
||||
shader.setMat4("view", view);
|
||||
shader.setMat4("projection", projection);
|
||||
// cubes
|
||||
glBindVertexArray(cubeVAO);
|
||||
glBindTexture(GL_TEXTURE_CUBE_MAP, skyboxTexture);
|
||||
glActiveTexture(GL_TEXTURE0);
|
||||
glBindTexture(GL_TEXTURE_2D, cubeTexture);
|
||||
glDrawArrays(GL_TRIANGLES, 0, 36);
|
||||
glBindVertexArray(0);
|
||||
|
||||
// Draw skybox as last
|
||||
glDepthFunc(GL_LEQUAL); // Change depth function so depth test passes when values are equal to depth buffer's content
|
||||
skyboxShader.Use();
|
||||
view = glm::mat4(glm::mat3(camera.GetViewMatrix())); // Remove any translation component of the view matrix
|
||||
glUniformMatrix4fv(glGetUniformLocation(skyboxShader.Program, "view"), 1, GL_FALSE, glm::value_ptr(view));
|
||||
glUniformMatrix4fv(glGetUniformLocation(skyboxShader.Program, "projection"), 1, GL_FALSE, glm::value_ptr(projection));
|
||||
// draw skybox as last
|
||||
glDepthFunc(GL_LEQUAL); // change depth function so depth test passes when values are equal to depth buffer's content
|
||||
skyboxShader.use();
|
||||
view = glm::mat4(glm::mat3(camera.GetViewMatrix())); // remove translation from the view matrix
|
||||
skyboxShader.setMat4("view", view);
|
||||
skyboxShader.setMat4("projection", projection);
|
||||
// skybox cube
|
||||
glBindVertexArray(skyboxVAO);
|
||||
glBindTexture(GL_TEXTURE_CUBE_MAP, skyboxTexture);
|
||||
glActiveTexture(GL_TEXTURE0);
|
||||
glBindTexture(GL_TEXTURE_CUBE_MAP, cubemapTexture);
|
||||
glDrawArrays(GL_TRIANGLES, 0, 36);
|
||||
glBindVertexArray(0);
|
||||
glDepthFunc(GL_LESS); // Set depth function back to default
|
||||
glDepthFunc(GL_LESS); // set depth function back to default
|
||||
|
||||
|
||||
// Swap the buffers
|
||||
// glfw: swap buffers and poll IO events (keys pressed/released, mouse moved etc.)
|
||||
// -------------------------------------------------------------------------------
|
||||
glfwSwapBuffers(window);
|
||||
glfwPollEvents();
|
||||
}
|
||||
|
||||
// optional: de-allocate all resources once they've outlived their purpose:
|
||||
// ------------------------------------------------------------------------
|
||||
glDeleteVertexArrays(1, &cubeVAO);
|
||||
glDeleteVertexArrays(1, &skyboxVAO);
|
||||
glDeleteBuffers(1, &cubeVBO);
|
||||
glDeleteBuffers(1, &skyboxVAO);
|
||||
|
||||
glfwTerminate();
|
||||
return 0;
|
||||
}
|
||||
|
||||
// Loads a cubemap texture from 6 individual texture faces
|
||||
// Order should be:
|
||||
// +X (right)
|
||||
// -X (left)
|
||||
// +Y (top)
|
||||
// -Y (bottom)
|
||||
// +Z (front)? (CHECK THIS)
|
||||
// -Z (back)?
|
||||
GLuint loadCubemap(std::vector<std::string> faces)
|
||||
// process all input: query GLFW whether relevant keys are pressed/released this frame and react accordingly
|
||||
// ---------------------------------------------------------------------------------------------------------
|
||||
void processInput(GLFWwindow *window)
|
||||
{
|
||||
GLuint textureID;
|
||||
glGenTextures(1, &textureID);
|
||||
glActiveTexture(GL_TEXTURE0);
|
||||
if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
|
||||
glfwSetWindowShouldClose(window, true);
|
||||
|
||||
int width, height;
|
||||
unsigned char* image;
|
||||
|
||||
glBindTexture(GL_TEXTURE_CUBE_MAP, textureID);
|
||||
for (GLuint i = 0; i < faces.size(); i++)
|
||||
{
|
||||
image = SOIL_load_image(faces[i].c_str(), &width, &height, 0, SOIL_LOAD_RGB);
|
||||
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
|
||||
}
|
||||
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
||||
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
||||
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);
|
||||
glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
|
||||
|
||||
return textureID;
|
||||
}
|
||||
|
||||
|
||||
// This function loads a texture from file. Note: texture loading functions like these are usually
|
||||
// managed by a 'Resource Manager' that manages all resources (like textures, models, audio).
|
||||
// For learning purposes we'll just define it as a utility function.
|
||||
GLuint loadTexture(GLchar const * path)
|
||||
{
|
||||
//Generate texture ID and load texture data
|
||||
GLuint textureID;
|
||||
glGenTextures(1, &textureID);
|
||||
int width, height;
|
||||
unsigned char* image = SOIL_load_image(path, &width, &height, 0, SOIL_LOAD_RGB);
|
||||
// Assign texture to ID
|
||||
glBindTexture(GL_TEXTURE_2D, textureID);
|
||||
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
|
||||
glGenerateMipmap(GL_TEXTURE_2D);
|
||||
|
||||
// Parameters
|
||||
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);
|
||||
glBindTexture(GL_TEXTURE_2D, 0);
|
||||
SOIL_free_image_data(image);
|
||||
return textureID;
|
||||
}
|
||||
|
||||
#pragma region "User input"
|
||||
|
||||
// Moves/alters the camera positions based on user input
|
||||
void Do_Movement()
|
||||
{
|
||||
// Camera controls
|
||||
if (keys[GLFW_KEY_W])
|
||||
float cameraSpeed = 2.5 * deltaTime;
|
||||
if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
|
||||
camera.ProcessKeyboard(FORWARD, deltaTime);
|
||||
if (keys[GLFW_KEY_S])
|
||||
if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)
|
||||
camera.ProcessKeyboard(BACKWARD, deltaTime);
|
||||
if (keys[GLFW_KEY_A])
|
||||
if (glfwGetKey(window, GLFW_KEY_A) == GLFW_PRESS)
|
||||
camera.ProcessKeyboard(LEFT, deltaTime);
|
||||
if (keys[GLFW_KEY_D])
|
||||
if (glfwGetKey(window, GLFW_KEY_D) == GLFW_PRESS)
|
||||
camera.ProcessKeyboard(RIGHT, deltaTime);
|
||||
}
|
||||
|
||||
// Is called whenever a key is pressed/released via GLFW
|
||||
void key_callback(GLFWwindow* window, int key, int scancode, int action, int mode)
|
||||
// glfw: whenever the window size changed (by OS or user resize) this callback function executes
|
||||
// ---------------------------------------------------------------------------------------------
|
||||
void framebuffer_size_callback(GLFWwindow* window, int width, int height)
|
||||
{
|
||||
if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
|
||||
glfwSetWindowShouldClose(window, GL_TRUE);
|
||||
|
||||
if (action == GLFW_PRESS)
|
||||
keys[key] = true;
|
||||
else if (action == GLFW_RELEASE)
|
||||
keys[key] = false;
|
||||
// make sure the viewport matches the new window dimensions; note that width and
|
||||
// height will be significantly larger than specified on retina displays.
|
||||
glViewport(0, 0, width, height);
|
||||
}
|
||||
|
||||
|
||||
// glfw: whenever the mouse moves, this callback is called
|
||||
// -------------------------------------------------------
|
||||
void mouse_callback(GLFWwindow* window, double xpos, double ypos)
|
||||
{
|
||||
if (firstMouse)
|
||||
@@ -360,8 +316,8 @@ void mouse_callback(GLFWwindow* window, double xpos, double ypos)
|
||||
firstMouse = false;
|
||||
}
|
||||
|
||||
GLfloat xoffset = xpos - lastX;
|
||||
GLfloat yoffset = lastY - ypos;
|
||||
float xoffset = xpos - lastX;
|
||||
float yoffset = lastY - ypos; // reversed since y-coordinates go from bottom to top
|
||||
|
||||
lastX = xpos;
|
||||
lastY = ypos;
|
||||
@@ -369,9 +325,87 @@ void mouse_callback(GLFWwindow* window, double xpos, double ypos)
|
||||
camera.ProcessMouseMovement(xoffset, yoffset);
|
||||
}
|
||||
|
||||
// glfw: whenever the mouse scroll wheel scrolls, this callback is called
|
||||
// ----------------------------------------------------------------------
|
||||
void scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
|
||||
{
|
||||
camera.ProcessMouseScroll(yoffset);
|
||||
}
|
||||
|
||||
#pragma endregion
|
||||
// utility function for loading a 2D texture from file
|
||||
// ---------------------------------------------------
|
||||
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;
|
||||
}
|
||||
|
||||
// loads a cubemap texture from 6 individual texture faces
|
||||
// order:
|
||||
// +X (right)
|
||||
// -X (left)
|
||||
// +Y (top)
|
||||
// -Y (bottom)
|
||||
// +Z (front)
|
||||
// -Z (back)
|
||||
// -------------------------------------------------------
|
||||
unsigned int loadCubemap(vector<std::string> faces)
|
||||
{
|
||||
unsigned int textureID;
|
||||
glGenTextures(1, &textureID);
|
||||
glBindTexture(GL_TEXTURE_CUBE_MAP, textureID);
|
||||
|
||||
int width, height, nrComponents;
|
||||
for (unsigned int i = 0; i < faces.size(); i++)
|
||||
{
|
||||
unsigned char *data = stbi_load(faces[i].c_str(), &width, &height, &nrComponents, 0);
|
||||
if (data)
|
||||
{
|
||||
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);
|
||||
stbi_image_free(data);
|
||||
}
|
||||
else
|
||||
{
|
||||
std::cout << "Cubemap texture failed to load at path: " << faces[i] << std::endl;
|
||||
stbi_image_free(data);
|
||||
}
|
||||
}
|
||||
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
||||
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
||||
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;
|
||||
}
|
||||
Reference in New Issue
Block a user