Architecture redesign
PART 1: - Added a Renderer class - Added a Application interface - Added a RenderPass interface - Added multiple RenderPass classes - Added a Window class - Moved Shaders into a Shader folder The idea behind this redesign is to make more abstractions. These abstraction are then supposedly going to make it easier to focus on the next couple tutorials main elements
This commit is contained in:
430
src/main.cpp
430
src/main.cpp
@ -1,399 +1,87 @@
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#include <stdio.h>
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#include <cmath>
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#include <vector>
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#include <glad/glad.h>
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#include <GLFW/glfw3.h>
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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 <vector>
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#include <string>
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#include "Window.h"
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#include "Renderer.h"
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#include "Skybox.h"
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#include "shader.h"
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#include "camera.h"
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#include "model.h"
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#include "FrameBuffer.hpp"
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#include "RenderBuffer.hpp"
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#include "Cubemap.h"
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#include "Application.h"
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// https://learnopengl.com/Advanced-OpenGL/Framebuffers
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class LearnOpenGL : Application
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{
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public:
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void Run () override{
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// Create a window
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Window window(800,600, "LearnOpenGL");
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float deltaTime = 0.0f; // Time between current frame and last frame
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float lastFrame = 0.0f; // Time of last frame
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Camera camera(glm::vec3(0.0f,0.0f,8.0f));
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Renderer renderer = Renderer(camera);
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renderer.Setup();
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stbi_set_flip_vertically_on_load(true);
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Camera camera(glm::vec3(0.0f, 0.0f, 8.0f));
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float lastX = 400, lastY = 300;
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bool firstMouse = true;
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// Load scene resources
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Shader shader ("Shaders/shader.vs", "Shaders/shader.fs");
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Shader outlineShader("Shaders/shader.vs","Shaders/outlineshader.fs");
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Shader skyboxShader("Shaders/skybox.vs", "Shaders/Cubemap.fs");
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glm::mat4 model = glm::mat4(1.0f);
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glm::mat4 view;
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glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), (float)800 / (float)600, 0.1f, 100.0f);
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glm::vec3 lightpos(-0.2f, -1.0f, -0.3f);
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Model backpack("Models/backpack.obj");
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int bullshit = 0;
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std::vector<std::string> faces = {
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"Textures/skybox/right.jpg",
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"Textures/skybox/left.jpg",
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"Textures/skybox/top.jpg",
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"Textures/skybox/bottom.jpg",
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"Textures/skybox/front.jpg",
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"Textures/skybox/back.jpg"
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};
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std::vector<float> ScreenVertices = {
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// vertex , uv
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-1.0f, 1.0f, 0.0f, 1.0f,
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-1.0f,-1.0f, 0.0f, 0.0f,
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1.0f, -1.0f, 1.0f, 0.0f,
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Skybox skybox= Skybox ();
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skybox.Bind();
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skybox.loadCubeTextures(faces);
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skybox.BuildVAO();
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-1.0f, 1.0f, 0.0f, 1.0f,
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1.0f, -1.0f, 1.0f, 0.0f,
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1.0f, 1.0f, 1.0f, 1.0f,
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} ;
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//glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
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while(!window.shouldClose())
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{
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//window.GetInput();
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std::vector<std::string> faces = {
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"Textures/skybox/right.jpg",
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"Textures/skybox/left.jpg",
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"Textures/skybox/top.jpg",
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"Textures/skybox/bottom.jpg",
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"Textures/skybox/front.jpg",
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"Textures/skybox/back.jpg"
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renderer.Render();
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window.SwapBuffers();
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glfwPollEvents();
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}
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}
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};
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std::vector<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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void framebuffer_size_callback(GLFWwindow* window, int width, int height) {
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glViewport(0,0, width, height);
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}
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/*
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void processInput( GLFWwindow* window){
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if(glfwGetKey(window,GLFW_KEY_ESCAPE) == GLFW_PRESS)
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glfwSetWindowShouldClose(window, true);
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const float CameraSpeed = 2.5f * deltaTime;
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const float CameraSpeed = 2.5f * Renderer::deltaTime;
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if(glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
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camera.ProcessKeyboard(FORWARD, deltaTime);
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Renderer::camera.ProcessKeyboard(FORWARD, Renderer::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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Renderer::camera.ProcessKeyboard(BACKWARD, Renderer::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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Renderer::camera.ProcessKeyboard(LEFT, Renderer::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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Renderer::camera.ProcessKeyboard(RIGHT,Renderer::deltaTime);
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}
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void mouse_callback(GLFWwindow* window, double xpos, double ypos){
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if (firstMouse) // initially set to true
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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 range from bottom to top
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lastX = xpos;
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lastY = ypos;
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*/
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camera.ProcessMouseMovement(xoffset,yoffset);
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}
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void scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
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int main()
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{
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camera.ProcessMouseScroll(yoffset);
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}
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GLFWwindow* CreateWindowWithOpenGLContext()
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{
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glfwInit();
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glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
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glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 6);
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glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
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// multisampling
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glfwWindowHint(GLFW_SAMPLES, 4);
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GLFWwindow* window = glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL);
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if( window == NULL){
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printf("Failed to create GLFW window!\n");
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glfwTerminate();
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return nullptr;
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}
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glfwMakeContextCurrent(window);
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if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)){
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printf("Failed to initialize GLAD!\n");
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return nullptr;
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}
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glViewport(0,0, 800, 600);
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glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
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glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
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glfwSetCursorPosCallback(window, mouse_callback);
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glfwSetScrollCallback(window, scroll_callback);
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return window;
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}
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void Skybox_pass (GLuint& SkyboxVAO, Shader& skyboxShader, Cubemap& skycubemap)
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{
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glDepthMask(GL_FALSE);
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skyboxShader.use();
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skyboxShader.setMat4("projection", projection);
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glm::mat4 centeredView = glm::mat4(glm::mat3(camera.GetViewMatrix()));
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skyboxShader.setMat4("view", centeredView);
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glBindVertexArray(SkyboxVAO);
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skycubemap.Bind();
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glDrawArrays(GL_TRIANGLES, 0, 36);
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glDepthMask(GL_TRUE);
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}
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void drawScene_pass(Shader& shader, Model& Object, Cubemap& skybox)
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{
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shader.use();
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shader.setVec3("cameraPos", camera.Position);
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glActiveTexture(GL_TEXTURE11);
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skybox.Bind();
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glActiveTexture(GL_TEXTURE0);
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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.setInt("skybox",11);
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Object.Draw(shader);
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}
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void outline_pass( Shader& shader, Model& Object)
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{
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glStencilFunc(GL_NOTEQUAL, 1, 0xFF);
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glStencilMask(0x00);
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glDisable(GL_DEPTH_TEST);
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shader.use();
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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("outlineColor", glm::vec3(0.28, 0.10, 0.26));
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model = glm::scale(model, glm::vec3(1.05f,1.05f, 1.05f));
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shader.setMat4("model", model);
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Object.Draw(shader);
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glStencilFunc(GL_ALWAYS, 1, 0xff);
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glStencilMask(0xFF);
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}
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void DrawToScreen( GLuint& VAO, GLuint& ScreenTexture, Shader& shader)
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{
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// draw to screen
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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glDisable(GL_DEPTH_TEST);
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glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT);
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shader.use();
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shader.setInt("screenTexture",0);
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glBindVertexArray(VAO);
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glBindTexture(GL_TEXTURE_2D, ScreenTexture);
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glDrawArrays(GL_TRIANGLES, 0, 6);
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}
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int main() {
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printf("Hello OpenGL!\n");
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// Setup OpenGL Context
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GLFWwindow* window = CreateWindowWithOpenGLContext();
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if(window == nullptr)
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return -1;
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glEnable(GL_DEPTH_TEST);
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stbi_set_flip_vertically_on_load(true);
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// Load scene resources
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Shader shader ("shader.vs", "shader.fs");
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Shader outlineShader("shader.vs","outlineshader.fs");
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Shader framebufferShader("Framebuffers.vs", "Framebuffers.fs" );
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Shader skyboxShader("skybox.vs", "Cubemap.fs");
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Model backpack("Models/backpack.obj");
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// Framebuffer outline effect
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FrameBuffer outlineFrameBuffer = FrameBuffer();
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outlineFrameBuffer.Bind();
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// Create a texture attachment (colour attachment)
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Texture* depthTexture = CreateTexture(800,600);
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// attach texture to the frame buffer as a colour attachment
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outlineFrameBuffer.Attach(*depthTexture);
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// Add depth buffer attachment
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RenderBuffer outlineRenderBuffer = RenderBuffer();
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outlineRenderBuffer.Bind();
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glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, 800, 600);
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outlineRenderBuffer.Unbind();
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// attach depth buffer to our framebuffer
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glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, outlineRenderBuffer.id);
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outlineFrameBuffer.Unbind();
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// Post processing
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FrameBuffer framebuffer = FrameBuffer();
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framebuffer.Bind();
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Texture* ColourBuffer = CreateTexture(800,600);
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framebuffer.Attach(*ColourBuffer);
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RenderBuffer renderbufferObject = RenderBuffer();
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renderbufferObject.Bind();
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renderbufferObject.UseDepthAndStencil();
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renderbufferObject.Unbind();
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framebuffer.Attach(renderbufferObject);
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if(framebuffer.IsComplete() == false ){
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std::cout << "ERROR::FRAMEBUFFER::Framebuffer is not complete! " << std::endl;
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}
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framebuffer.Unbind();
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Cubemap skybox= Cubemap ();
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skybox.Bind();
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skybox.loadCubeTextures(faces);
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// Create ScreenVAO
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GLuint ScreenVAO, VBO;
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glGenVertexArrays(1, &ScreenVAO);
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glBindVertexArray(ScreenVAO);
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glGenBuffers(1, &VBO);
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glBindBuffer(GL_ARRAY_BUFFER, VBO);
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glBufferData(GL_ARRAY_BUFFER, ScreenVertices.size() * sizeof(float), &ScreenVertices[0], GL_STATIC_DRAW);
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glEnableVertexAttribArray(0);
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glVertexAttribPointer(0,2, GL_FLOAT,GL_FALSE, 4 * sizeof(float),(void*) 0 );
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glEnableVertexAttribArray(1);
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glVertexAttribPointer(1,2,GL_FLOAT, GL_FALSE, 4 * sizeof(float), (void*)(2*sizeof(float)));
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glBindVertexArray(0);
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// Create SkyboxVAO
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GLuint SkyboxVAO, SkyboxVBO;
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glGenVertexArrays(1, &SkyboxVAO);
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glBindVertexArray(SkyboxVAO);
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glGenBuffers(1, &SkyboxVBO);
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glBindBuffer(GL_ARRAY_BUFFER, SkyboxVBO);
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glBufferData(GL_ARRAY_BUFFER, skyboxVertices.size() * sizeof(float), &skyboxVertices[0], 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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glBindVertexArray(0);
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glEnable(GL_DEPTH_TEST);
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glEnable(GL_STENCIL_TEST);
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glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
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glEnable(GL_MULTISAMPLE);
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//glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
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while(!glfwWindowShouldClose(window))
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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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processInput(window);
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glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
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// Recalculate the Camera's view matrix
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view = camera.GetViewMatrix();
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// Reset the model matrix to an identity matrix
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model = glm::mat4(1.0f);
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framebuffer.Bind();
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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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Skybox_pass(SkyboxVAO, skyboxShader, skybox);
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drawScene_pass(shader, backpack, skybox);
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outline_pass(outlineShader, backpack);
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DrawToScreen(ScreenVAO, ColourBuffer->id, framebufferShader);
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// Reset stencil
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glStencilMask(0xFF);
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glStencilFunc(GL_ALWAYS, 1, 0xFF);
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glEnable(GL_DEPTH_TEST);
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glfwSwapBuffers(window);
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glfwPollEvents();
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LearnOpenGL().Run();
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return 0;
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}
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delete ColourBuffer;
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delete depthTexture;
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glfwTerminate();
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return 0;
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}
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Reference in New Issue
Block a user