mirror of
https://github.com/JoeyDeVries/LearnOpenGL.git
synced 2026-01-30 20:13:22 +08:00
All PBR tuts updated.
This commit is contained in:
Joey de Vries
@@ -1,86 +1,84 @@
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// Std. Includes
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#include <string>
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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 <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 "stb_image.h"
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#include <iostream>
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// Properties
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const GLuint SCR_WIDTH = 1280, SCR_HEIGHT = 720;
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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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void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
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void processInput(GLFWwindow *window);
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void renderSphere();
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void renderCube();
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void RenderQuad();
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void renderQuad();
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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 = 800.0f / 2.0;
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float lastY = 600.0 / 2.0;
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bool firstMouse = true;
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// timing
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GLfloat deltaTime = 0.0f;
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GLfloat lastFrame = 0.0f;
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float deltaTime = 0.0f;
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float lastFrame = 0.0f;
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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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// The MAIN function, from here we start the application and run the Game loop
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int main()
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{
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// GLFW Init
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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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glfwWindowHint(GLFW_SAMPLES, 4);
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glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
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glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
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GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "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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// GLFW config
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// -----------
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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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// 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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// -----------------------------------------------------
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glewExperimental = GL_TRUE;
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glewInit();
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glGetError();
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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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// Setup OpenGL state
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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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// set depth function to less than AND equal for skybox depth trick.
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glDepthFunc(GL_LEQUAL);
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glDepthFunc(GL_LEQUAL);
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// enable seamless cubemap sampling for lower mip levels in the pre-filter map.
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glEnable(GL_TEXTURE_CUBE_MAP_SEAMLESS);
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// load and initialize shaders
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// ---------------------------
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// build and compile shaders
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// -------------------------
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Shader pbrShader("2.2.1.pbr.vs", "2.2.1.pbr.frag");
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Shader equirectangularToCubemapShader("2.2.1.cubemap.vs", "2.2.1.equirectangular_to_cubemap.frag");
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Shader irradianceShader("2.2.1.cubemap.vs", "2.2.1.irradiance_convolution.frag");
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@@ -88,23 +86,24 @@ int main()
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Shader brdfShader("2.2.1.brdf.vs", "2.2.1.brdf.frag");
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Shader backgroundShader("2.2.1.background.vs", "2.2.1.background.frag");
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pbrShader.Use();
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glUniform1i(glGetUniformLocation(pbrShader.Program, "irradianceMap"), 0);
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glUniform1i(glGetUniformLocation(pbrShader.Program, "prefilterMap"), 1);
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glUniform1i(glGetUniformLocation(pbrShader.Program, "brdfLUT"), 2);
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glUniform3f(glGetUniformLocation(pbrShader.Program, "albedo"), 0.5f, 0.0f, 0.0f);
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glUniform1f(glGetUniformLocation(pbrShader.Program, "ao"), 1.0f);
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pbrShader.use();
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pbrShader.setInt("irradianceMap", 0);
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pbrShader.setInt("prefilterMap", 1);
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pbrShader.setInt("brdfLUT", 2);
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pbrShader.setVec3("albedo", 0.5f, 0.0f, 0.0f);
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pbrShader.setFloat("ao", 1.0f);
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backgroundShader.Use();
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glUniform1i(glGetUniformLocation(backgroundShader.Program, "environmentMap"), 0);
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backgroundShader.use();
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backgroundShader.setInt("environmentMap", 0);
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// lights
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// ------
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glm::vec3 lightPositions[] = {
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glm::vec3(-10.0f, 10.0f, 10.0f),
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glm::vec3(10.0f, 10.0f, 10.0f),
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glm::vec3( 10.0f, 10.0f, 10.0f),
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glm::vec3(-10.0f, -10.0f, 10.0f),
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glm::vec3(10.0f, -10.0f, 10.0f),
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glm::vec3( 10.0f, -10.0f, 10.0f),
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};
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glm::vec3 lightColors[] = {
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glm::vec3(300.0f, 300.0f, 300.0f),
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@@ -182,17 +181,17 @@ int main()
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// pbr: convert HDR equirectangular environment map to cubemap equivalent
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// ----------------------------------------------------------------------
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equirectangularToCubemapShader.Use();
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glUniform1i(glGetUniformLocation(equirectangularToCubemapShader.Program, "equirectangularMap"), 0);
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equirectangularToCubemapShader.use();
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equirectangularToCubemapShader.setInt("equirectangularMap", 0);
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_2D, hdrTexture);
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glUniformMatrix4fv(glGetUniformLocation(equirectangularToCubemapShader.Program, "projection"), 1, GL_FALSE, glm::value_ptr(captureProjection));
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equirectangularToCubemapShader.setMat4("projection", captureProjection);
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glViewport(0, 0, 512, 512); // don't forget to configure the viewport to the capture dimensions.
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glBindFramebuffer(GL_FRAMEBUFFER, captureFBO);
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for (unsigned int i = 0; i < 6; ++i)
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{
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glUniformMatrix4fv(glGetUniformLocation(equirectangularToCubemapShader.Program, "view"), 1, GL_FALSE, glm::value_ptr(captureViews[i]));
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equirectangularToCubemapShader.setMat4("view", captureViews[i]);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, envCubemap, 0);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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@@ -225,17 +224,17 @@ int main()
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// pbr: solve diffuse integral by convolution to create an irradiance (cube)map.
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// -----------------------------------------------------------------------------
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irradianceShader.Use();
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glUniform1i(glGetUniformLocation(irradianceShader.Program, "environmentMap"), 0);
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irradianceShader.use();
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irradianceShader.setInt("environmentMap", 0);
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_CUBE_MAP, envCubemap);
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glUniformMatrix4fv(glGetUniformLocation(irradianceShader.Program, "projection"), 1, GL_FALSE, glm::value_ptr(captureProjection));
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irradianceShader.setMat4("projection", captureProjection);
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glViewport(0, 0, 32, 32); // don't forget to configure the viewport to the capture dimensions.
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glBindFramebuffer(GL_FRAMEBUFFER, captureFBO);
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for (unsigned int i = 0; i < 6; ++i)
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{
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glUniformMatrix4fv(glGetUniformLocation(irradianceShader.Program, "view"), 1, GL_FALSE, glm::value_ptr(captureViews[i]));
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irradianceShader.setMat4("view", captureViews[i]);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, irradianceMap, 0);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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@@ -262,11 +261,11 @@ int main()
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// pbr: run a quasi monte-carlo simulation on the environment lighting to create a prefilter (cube)map.
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// ----------------------------------------------------------------------------------------------------
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prefilterShader.Use();
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glUniform1i(glGetUniformLocation(prefilterShader.Program, "environmentMap"), 0);
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prefilterShader.use();
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prefilterShader.setInt("environmentMap", 0);
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_CUBE_MAP, envCubemap);
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glUniformMatrix4fv(glGetUniformLocation(prefilterShader.Program, "projection"), 1, GL_FALSE, glm::value_ptr(captureProjection));
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prefilterShader.setMat4("projection", captureProjection);
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glBindFramebuffer(GL_FRAMEBUFFER, captureFBO);
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unsigned int maxMipLevels = 5;
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@@ -280,10 +279,10 @@ int main()
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glViewport(0, 0, mipWidth, mipHeight);
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float roughness = (float)mip / (float)(maxMipLevels - 1);
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glUniform1f(glGetUniformLocation(prefilterShader.Program, "roughness"), roughness);
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prefilterShader.setFloat("roughness", roughness);
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for (unsigned int i = 0; i < 6; ++i)
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{
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glUniformMatrix4fv(glGetUniformLocation(prefilterShader.Program, "view"), 1, GL_FALSE, glm::value_ptr(captureViews[i]));
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prefilterShader.setMat4("view", captureViews[i]);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, prefilterMap, mip);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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@@ -313,9 +312,9 @@ int main()
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, brdfLUTTexture, 0);
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glViewport(0, 0, 512, 512);
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brdfShader.Use();
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brdfShader.use();
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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RenderQuad();
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renderQuad();
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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@@ -323,37 +322,43 @@ int main()
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// initialize static shader uniforms before rendering
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// --------------------------------------------------
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glm::mat4 projection = glm::perspective(camera.Zoom, (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
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pbrShader.Use();
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glUniformMatrix4fv(glGetUniformLocation(pbrShader.Program, "projection"), 1, GL_FALSE, glm::value_ptr(projection));
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backgroundShader.Use();
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glUniformMatrix4fv(glGetUniformLocation(backgroundShader.Program, "projection"), 1, GL_FALSE, glm::value_ptr(projection));
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pbrShader.use();
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pbrShader.setMat4("projection", projection);
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backgroundShader.use();
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backgroundShader.setMat4("projection", projection);
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// then before rendering, configure the viewport to the actual screen dimensions
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glViewport(0, 0, SCR_WIDTH, SCR_HEIGHT);
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// then before rendering, configure the viewport to the original framebuffer's screen dimensions
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int scrWidth, scrHeight;
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glfwGetFramebufferSize(window, &scrWidth, &scrHeight);
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glViewport(0, 0, scrWidth, scrHeight);
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// Game loop
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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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// set frame time
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GLfloat currentFrame = glfwGetTime();
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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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// check and call events
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glfwPollEvents();
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Do_Movement();
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// input
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// -----
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processInput(window);
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// clear the colorbuffer
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glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
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// render
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// ------
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glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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// render scene, supplying the convoluted irradiance map to the final shader.
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// render scene, supplying the convoluted irradiance map to the final shader.
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// ------------------------------------------------------------------------------------------
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pbrShader.Use();
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pbrShader.use();
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glm::mat4 view = camera.GetViewMatrix();
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glUniformMatrix4fv(glGetUniformLocation(pbrShader.Program, "view"), 1, GL_FALSE, glm::value_ptr(view));
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glUniform3fv(glGetUniformLocation(pbrShader.Program, "camPos"), 1, &camera.Position[0]);
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pbrShader.setMat4("view", view);
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pbrShader.setVec3("camPos", camera.Position);
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// bind pre-computed IBL data
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_CUBE_MAP, irradianceMap);
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glActiveTexture(GL_TEXTURE1);
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@@ -365,12 +370,12 @@ int main()
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glm::mat4 model;
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for (int row = 0; row < nrRows; ++row)
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{
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glUniform1f(glGetUniformLocation(pbrShader.Program, "metallic"), (float)row / (float)nrRows);
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pbrShader.setFloat("metallic", (float)row / (float)nrRows);
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for (int col = 0; col < nrColumns; ++col)
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{
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// we clamp the roughness to 0.025 - 1.0 as perfectly smooth surfaces (roughness of 0.0) tend to look a bit off
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// on direct lighting.
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glUniform1f(glGetUniformLocation(pbrShader.Program, "roughness"), glm::clamp((float)col / (float)nrColumns, 0.05f, 1.0f));
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pbrShader.setFloat("roughness", glm::clamp((float)col / (float)nrColumns, 0.05f, 1.0f));
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model = glm::mat4();
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model = glm::translate(model, glm::vec3(
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@@ -378,11 +383,12 @@ int main()
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(float)(row - (nrRows / 2)) * spacing,
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-2.0f
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));
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glUniformMatrix4fv(glGetUniformLocation(pbrShader.Program, "model"), 1, GL_FALSE, glm::value_ptr(model));
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pbrShader.setMat4("model", model);
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renderSphere();
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}
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}
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// render light source (simply re-render sphere at light positions)
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// this looks a bit off as we use the same shader, but it'll make their positions obvious and
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// keeps the codeprint small.
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@@ -390,39 +396,100 @@ int main()
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{
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glm::vec3 newPos = lightPositions[i] + glm::vec3(sin(glfwGetTime() * 5.0) * 5.0, 0.0, 0.0);
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newPos = lightPositions[i];
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glUniform3fv(glGetUniformLocation(pbrShader.Program, ("lightPositions[" + std::to_string(i) + "]").c_str()), 1, &newPos[0]); \
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glUniform3fv(glGetUniformLocation(pbrShader.Program, ("lightColors[" + std::to_string(i) + "]").c_str()), 1, &lightColors[i][0]);
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pbrShader.setVec3("lightPositions[" + std::to_string(i) + "]", newPos);
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pbrShader.setVec3("lightColors[" + std::to_string(i) + "]", lightColors[i]);
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model = glm::mat4();
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model = glm::translate(model, newPos);
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model = glm::scale(model, glm::vec3(0.5f));
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glUniformMatrix4fv(glGetUniformLocation(pbrShader.Program, "model"), 1, GL_FALSE, glm::value_ptr(model));
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pbrShader.setMat4("model", model);
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renderSphere();
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}
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// render skybox (render as last to prevent overdraw)
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backgroundShader.Use();
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glUniformMatrix4fv(glGetUniformLocation(backgroundShader.Program, "view"), 1, GL_FALSE, glm::value_ptr(view));
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backgroundShader.use();
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backgroundShader.setMat4("view", view);
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_CUBE_MAP, envCubemap);
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//glBindTexture(GL_TEXTURE_CUBE_MAP, irradianceMap); // display irradiance map
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//glBindTexture(GL_TEXTURE_CUBE_MAP, prefilterMap); // display prefilter map
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renderCube();
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// render BRDF map to screen
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//brdfShader.Use();
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//RenderQuad();
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//renderQuad();
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||||
// Swap the buffers
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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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||||
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||||
// glfw: terminate, clearing all previously allocated GLFW resources.
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// ------------------------------------------------------------------
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||||
glfwTerminate();
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return 0;
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||||
}
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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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||||
void processInput(GLFWwindow *window)
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||||
{
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||||
if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
|
||||
glfwSetWindowShouldClose(window, true);
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||||
|
||||
float cameraSpeed = 2.5 * deltaTime;
|
||||
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);
|
||||
}
|
||||
|
||||
// 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)
|
||||
{
|
||||
// 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)
|
||||
{
|
||||
lastX = xpos;
|
||||
lastY = ypos;
|
||||
firstMouse = false;
|
||||
}
|
||||
|
||||
float xoffset = xpos - lastX;
|
||||
float yoffset = lastY - ypos; // reversed since y-coordinates go from bottom to top
|
||||
|
||||
lastX = xpos;
|
||||
lastY = 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);
|
||||
}
|
||||
|
||||
// renders (and builds at first invocation) a sphere
|
||||
// -------------------------------------------------
|
||||
unsigned int sphereVAO = 0;
|
||||
unsigned int indexCount;
|
||||
void renderSphere()
|
||||
@@ -507,221 +574,119 @@ void renderSphere()
|
||||
glBufferData(GL_ELEMENT_ARRAY_BUFFER, indices.size() * sizeof(unsigned int), &indices[0], GL_STATIC_DRAW);
|
||||
float stride = (3 + 2 + 3) * sizeof(float);
|
||||
glEnableVertexAttribArray(0);
|
||||
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, stride, (GLvoid*)0);
|
||||
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, stride, (void*)0);
|
||||
glEnableVertexAttribArray(1);
|
||||
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, stride, (GLvoid*)(3 * sizeof(float)));
|
||||
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, stride, (void*)(3 * sizeof(float)));
|
||||
glEnableVertexAttribArray(2);
|
||||
glVertexAttribPointer(2, 3, GL_FLOAT, GL_FALSE, stride, (GLvoid*)(5 * sizeof(float)));
|
||||
glVertexAttribPointer(2, 3, GL_FLOAT, GL_FALSE, stride, (void*)(5 * sizeof(float)));
|
||||
}
|
||||
|
||||
glBindVertexArray(sphereVAO);
|
||||
glDrawElements(GL_TRIANGLE_STRIP, indexCount, GL_UNSIGNED_INT, 0);
|
||||
}
|
||||
// RenderCube() Renders a 1x1 3D cube in NDC.
|
||||
GLuint cubeVAO = 0;
|
||||
GLuint cubeVBO = 0;
|
||||
|
||||
// renderCube() renders a 1x1 3D cube in NDC.
|
||||
// -------------------------------------------------
|
||||
unsigned int cubeVAO = 0;
|
||||
unsigned int cubeVBO = 0;
|
||||
void renderCube()
|
||||
{
|
||||
// Initialize (if necessary)
|
||||
// initialize (if necessary)
|
||||
if (cubeVAO == 0)
|
||||
{
|
||||
GLfloat vertices[] = {
|
||||
// Back face
|
||||
-1.0f, -1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f, // Bottom-left
|
||||
1.0f, 1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f, // top-right
|
||||
1.0f, -1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 1.0f, 0.0f, // bottom-right
|
||||
1.0f, 1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f, // top-right
|
||||
-1.0f, -1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f, // bottom-left
|
||||
-1.0f, 1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 1.0f,// top-left
|
||||
// Front face
|
||||
float vertices[] = {
|
||||
// back face
|
||||
-1.0f, -1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f, // bottom-left
|
||||
1.0f, 1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f, // top-right
|
||||
1.0f, -1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 1.0f, 0.0f, // bottom-right
|
||||
1.0f, 1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f, // top-right
|
||||
-1.0f, -1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f, // bottom-left
|
||||
-1.0f, 1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 1.0f, // top-left
|
||||
// front face
|
||||
-1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, // bottom-left
|
||||
1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, // bottom-right
|
||||
1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, // top-right
|
||||
1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, // top-right
|
||||
-1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, // top-left
|
||||
-1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, // bottom-left
|
||||
// Left face
|
||||
1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, // bottom-right
|
||||
1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, // top-right
|
||||
1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, // top-right
|
||||
-1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, // top-left
|
||||
-1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, // bottom-left
|
||||
// left face
|
||||
-1.0f, 1.0f, 1.0f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f, // top-right
|
||||
-1.0f, 1.0f, -1.0f, -1.0f, 0.0f, 0.0f, 1.0f, 1.0f, // top-left
|
||||
-1.0f, -1.0f, -1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f, // bottom-left
|
||||
-1.0f, -1.0f, -1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f, // bottom-left
|
||||
-1.0f, -1.0f, 1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 0.0f, // bottom-right
|
||||
-1.0f, -1.0f, -1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f, // bottom-left
|
||||
-1.0f, -1.0f, 1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 0.0f, // bottom-right
|
||||
-1.0f, 1.0f, 1.0f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f, // top-right
|
||||
// Right face
|
||||
1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, // top-left
|
||||
1.0f, -1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f, // bottom-right
|
||||
1.0f, 1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, // top-right
|
||||
1.0f, -1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f, // bottom-right
|
||||
1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, // top-left
|
||||
1.0f, -1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, // bottom-left
|
||||
// Bottom face
|
||||
// right face
|
||||
1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, // top-left
|
||||
1.0f, -1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f, // bottom-right
|
||||
1.0f, 1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, // top-right
|
||||
1.0f, -1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f, // bottom-right
|
||||
1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, // top-left
|
||||
1.0f, -1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, // bottom-left
|
||||
// bottom face
|
||||
-1.0f, -1.0f, -1.0f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f, // top-right
|
||||
1.0f, -1.0f, -1.0f, 0.0f, -1.0f, 0.0f, 1.0f, 1.0f, // top-left
|
||||
1.0f, -1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f,// bottom-left
|
||||
1.0f, -1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f, // bottom-left
|
||||
1.0f, -1.0f, -1.0f, 0.0f, -1.0f, 0.0f, 1.0f, 1.0f, // top-left
|
||||
1.0f, -1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f, // bottom-left
|
||||
1.0f, -1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f, // bottom-left
|
||||
-1.0f, -1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 0.0f, 0.0f, // bottom-right
|
||||
-1.0f, -1.0f, -1.0f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f, // top-right
|
||||
// Top face
|
||||
-1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f,// top-left
|
||||
1.0f, 1.0f , 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, // bottom-right
|
||||
1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, // top-right
|
||||
1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, // bottom-right
|
||||
-1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f,// top-left
|
||||
-1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f // bottom-left
|
||||
// top face
|
||||
-1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, // top-left
|
||||
1.0f, 1.0f , 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, // bottom-right
|
||||
1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, // top-right
|
||||
1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, // bottom-right
|
||||
-1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, // top-left
|
||||
-1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f // bottom-left
|
||||
};
|
||||
glGenVertexArrays(1, &cubeVAO);
|
||||
glGenBuffers(1, &cubeVBO);
|
||||
// Fill buffer
|
||||
// fill buffer
|
||||
glBindBuffer(GL_ARRAY_BUFFER, cubeVBO);
|
||||
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
|
||||
// Link vertex attributes
|
||||
// link vertex attributes
|
||||
glBindVertexArray(cubeVAO);
|
||||
glEnableVertexAttribArray(0);
|
||||
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)0);
|
||||
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)0);
|
||||
glEnableVertexAttribArray(1);
|
||||
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
|
||||
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(3 * sizeof(float)));
|
||||
glEnableVertexAttribArray(2);
|
||||
glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)(6 * sizeof(GLfloat)));
|
||||
glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(6 * sizeof(float)));
|
||||
glBindBuffer(GL_ARRAY_BUFFER, 0);
|
||||
glBindVertexArray(0);
|
||||
}
|
||||
// Render Cube
|
||||
// render Cube
|
||||
glBindVertexArray(cubeVAO);
|
||||
glDrawArrays(GL_TRIANGLES, 0, 36);
|
||||
glBindVertexArray(0);
|
||||
}
|
||||
|
||||
// RenderQuad() Renders a 1x1 XY quad in NDC
|
||||
GLuint quadVAO = 0;
|
||||
GLuint quadVBO;
|
||||
void RenderQuad()
|
||||
// renderQuad() renders a 1x1 XY quad in NDC
|
||||
// -----------------------------------------
|
||||
unsigned int quadVAO = 0;
|
||||
unsigned int quadVBO;
|
||||
void renderQuad()
|
||||
{
|
||||
if (quadVAO == 0)
|
||||
if (quadVAO == 0)
|
||||
{
|
||||
GLfloat quadVertices[] = {
|
||||
// Positions // Texture Coords
|
||||
-1.0f, 1.0f, 0.0f, 0.0f, 1.0f,
|
||||
float quadVertices[] = {
|
||||
// positions // texture Coords
|
||||
-1.0f, 1.0f, 0.0f, 0.0f, 1.0f,
|
||||
-1.0f, -1.0f, 0.0f, 0.0f, 0.0f,
|
||||
1.0f, 1.0f, 0.0f, 1.0f, 1.0f,
|
||||
1.0f, -1.0f, 0.0f, 1.0f, 0.0f,
|
||||
1.0f, 1.0f, 0.0f, 1.0f, 1.0f,
|
||||
1.0f, -1.0f, 0.0f, 1.0f, 0.0f,
|
||||
};
|
||||
// Setup plane VAO
|
||||
// setup plane VAO
|
||||
glGenVertexArrays(1, &quadVAO);
|
||||
glGenBuffers(1, &quadVBO);
|
||||
glBindVertexArray(quadVAO);
|
||||
glBindBuffer(GL_ARRAY_BUFFER, quadVBO);
|
||||
glBufferData(GL_ARRAY_BUFFER, sizeof(quadVertices), &quadVertices, GL_STATIC_DRAW);
|
||||
glEnableVertexAttribArray(0);
|
||||
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), (GLvoid*)0);
|
||||
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void*)0);
|
||||
glEnableVertexAttribArray(1);
|
||||
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
|
||||
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void*)(3 * sizeof(float)));
|
||||
}
|
||||
glBindVertexArray(quadVAO);
|
||||
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
|
||||
glBindVertexArray(0);
|
||||
}
|
||||
|
||||
// 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.
|
||||
unsigned int loadTexture(char const * path)
|
||||
{
|
||||
//Generate texture ID and load texture data
|
||||
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);
|
||||
|
||||
// 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);
|
||||
|
||||
stbi_image_free(data);
|
||||
}
|
||||
else
|
||||
{
|
||||
std::cout << "Texture failed to load at path: " << path << std::endl;
|
||||
stbi_image_free(data);
|
||||
}
|
||||
|
||||
return textureID;
|
||||
}
|
||||
|
||||
#pragma region "User input"
|
||||
|
||||
bool keys[1024];
|
||||
bool keysPressed[1024];
|
||||
// Moves/alters the camera positions based on user input
|
||||
void Do_Movement()
|
||||
{
|
||||
// Camera controls
|
||||
if (keys[GLFW_KEY_W])
|
||||
camera.ProcessKeyboard(FORWARD, deltaTime);
|
||||
if (keys[GLFW_KEY_S])
|
||||
camera.ProcessKeyboard(BACKWARD, deltaTime);
|
||||
if (keys[GLFW_KEY_A])
|
||||
camera.ProcessKeyboard(LEFT, deltaTime);
|
||||
if (keys[GLFW_KEY_D])
|
||||
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)
|
||||
{
|
||||
if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
|
||||
glfwSetWindowShouldClose(window, GL_TRUE);
|
||||
|
||||
if (key >= 0 && key <= 1024)
|
||||
{
|
||||
if (action == GLFW_PRESS)
|
||||
keys[key] = true;
|
||||
else if (action == GLFW_RELEASE)
|
||||
{
|
||||
keys[key] = false;
|
||||
keysPressed[key] = false;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
GLfloat lastX = 400, lastY = 300;
|
||||
bool firstMouse = true;
|
||||
// Moves/alters the camera positions based on user input
|
||||
void mouse_callback(GLFWwindow* window, double xpos, double ypos)
|
||||
{
|
||||
if (firstMouse)
|
||||
{
|
||||
lastX = xpos;
|
||||
lastY = ypos;
|
||||
firstMouse = false;
|
||||
}
|
||||
|
||||
GLfloat xoffset = xpos - lastX;
|
||||
GLfloat yoffset = lastY - ypos;
|
||||
|
||||
lastX = xpos;
|
||||
lastY = ypos;
|
||||
|
||||
camera.ProcessMouseMovement(xoffset, yoffset);
|
||||
}
|
||||
|
||||
void scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
|
||||
{
|
||||
camera.ProcessMouseScroll(yoffset);
|
||||
}
|
||||
|
||||
#pragma endregion
|
||||
}
|
||||
Reference in New Issue
Block a user