X-Git-Url: https://gitweb.ps.run/subsurface_scattering/blobdiff_plain/357464ac8bd3bd04d886460b5ec1720520d22460..9d10826ccb5d1f8a3821d4d2f4242c401146d12d:/src/main.cpp?ds=sidebyside

diff --git a/src/main.cpp b/src/main.cpp
index 1b59749..41d5e76 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,214 +1,506 @@
 #include <stdio.h>
+#include <fstream>
 
 #include <GL/glew.h>
 
+#define GLM_ENABLE_EXPERIMENTAL
+
 #include <glm/glm.hpp>
+#include <glm/gtx/rotate_vector.hpp>
 #include <glm/gtc/matrix_transform.hpp>
 #include <glm/gtc/type_ptr.hpp>
 
 #include <SFML/OpenGL.hpp>
-#include <SFML/Window.hpp>
+#include <SFML/Graphics.hpp>
+
+#include <imgui.h>
+#include <imgui-SFML.h>
 
 #include <assimp/Importer.hpp>
-#include <assimp/scene.h>
 #include <assimp/postprocess.h>
+#include <assimp/scene.h>
+
+struct model {
+  std::vector<float> vertices;
+  std::vector<GLuint> indices;
+
+  void draw() {
+    if (VAO == 0) initVAO();
+    glBindVertexArray(VAO);
+    glDrawElements(GL_TRIANGLES, indices.size(), GL_UNSIGNED_INT, 0);
+    glBindVertexArray(0);
+  }
+
+private:
+  void initVAO() {
+    GLuint VBO;
+    glGenBuffers(1, &VBO);
+
+    GLuint EBO;
+    glGenBuffers(1, &EBO);
+
+    glGenVertexArrays(1, &VAO);
+
+    glBindVertexArray(VAO);
+
+    glBindBuffer(GL_ARRAY_BUFFER, VBO);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(float) * vertices.size(),
+                vertices.data(), GL_STATIC_DRAW);
+
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(GLuint) * indices.size(),
+                indices.data(), GL_STATIC_DRAW);
+
+    glEnableVertexAttribArray(0);
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(float) * 6, (void*)(0));
+    glEnableVertexAttribArray(1);
+    glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(float) * 6, (void*)(sizeof(float) * 3));
+
+    glBindVertexArray(0);
+  }
+  GLuint VAO = 0;
+};
+
+
+struct freecam {
+  glm::vec3 pos = glm::vec3(0, 0, -1);
+  glm::vec2 rot = glm::vec2(0, 0);
+
+  void update(sf::Window &window) {
+    int mouseDeltaX = sf::Mouse::getPosition(window).x - window.getSize().x / 2;
+    int mouseDeltaY = sf::Mouse::getPosition(window).y - window.getSize().y / 2;
+
+    rot.x += mouseDeltaX;
+    rot.y += mouseDeltaY;
+
+    forward = glm::rotate(glm::vec3(0, 0, 1), rot.y / angleFactor, glm::vec3(1, 0, 0));
+    forward = glm::rotate(forward, -rot.x / angleFactor, glm::vec3(0, 1, 0));
+
+    glm::vec3 left = glm::rotate(glm::vec3(0, 0, 1), -rot.x / angleFactor + glm::radians(90.0f), glm::vec3(0, 1, 0));
+
+    if (sf::Keyboard::isKeyPressed(sf::Keyboard::Key::LShift))
+      moveFactor = 200;
+    else
+      moveFactor = 20;
+
+    if (sf::Keyboard::isKeyPressed(sf::Keyboard::W))
+      pos += forward / moveFactor;
+    if (sf::Keyboard::isKeyPressed(sf::Keyboard::S))
+      pos -= forward / moveFactor;
+    if (sf::Keyboard::isKeyPressed(sf::Keyboard::A))
+      pos += left / moveFactor;
+    if (sf::Keyboard::isKeyPressed(sf::Keyboard::D))
+      pos -= left / moveFactor;
+
+    limit();
+  }
+
+  void limit() {
+    rot.x = fmod(rot.x, glm::radians(360.0f) * angleFactor);
+    rot.y = fmod(rot.y, glm::radians(360.0f) * angleFactor);
+  }
 
+  glm::mat4 getViewMatrix() {
+    forward = glm::rotate(glm::vec3(0, 0, 1), rot.y / angleFactor, glm::vec3(1, 0, 0));
+    forward = glm::rotate(forward, -rot.x / angleFactor, glm::vec3(0, 1, 0));
+    glm::mat4 result = glm::lookAt(pos, pos + forward, up);
+    return result;
+  }
+
+private:
+  glm::vec3 forward = glm::vec3(0, 0, 1);
+  glm::vec3 up = glm::vec3(0, 1, 0);
+
+  const float angleFactor = 200;
+  float moveFactor = 20;
+};
+
+
+struct arccam {
+  glm::vec2 rot = glm::vec2(0, 0);
+  float radius = 1;
+
+  void update(sf::Window &window) {
+    int mouseDeltaX = sf::Mouse::getPosition(window).x - window.getSize().x / 2;
+    int mouseDeltaY = sf::Mouse::getPosition(window).y - window.getSize().y / 2;
+
+    rot.x += mouseDeltaX;
+    rot.y += mouseDeltaY;
+
+    limit(-89, 89);
+  }
+
+  void limit(float minY, float maxY) {
+    float angleX = rot.x / angleFactor;
+    float angleY = rot.y / angleFactor;
+
+    rot.x = fmod(rot.x, glm::radians(360.0f) * angleFactor);
+
+    if (angleY > glm::radians(maxY))
+      rot.y = glm::radians(maxY) * angleFactor;
+    if (angleY < glm::radians(minY))
+      rot.y = glm::radians(minY) * angleFactor;
+  }
+
+  glm::vec3 getPos() {
+    float angle = rot.y / angleFactor;
+  
+    float camY = sin(angle) * exp(radius);
+    float camZ = cos(angle) * exp(radius);
+
+    glm::vec3 result(0.0, camY, camZ);
+    return glm::rotate(result, -rot.x / angleFactor, glm::vec3(0, 1, 0));
+  }
+
+  glm::mat4 getViewMatrix() {
+    float angle = rot.y / angleFactor;
+  
+    float camY = sin(angle) * exp(radius);
+    float camZ = cos(angle) * exp(radius);
+    glm::mat4 result = glm::lookAt(glm::vec3(0.0, camY, camZ), glm::vec3(0, 0, 0), glm::vec3(0, 1, 0));
+    result = glm::rotate(result, rot.x / angleFactor, glm::vec3(0, 1, 0));
+
+    return result;
+  }
+
+private:
+  const float angleFactor = 200;
+};
+
+
+std::string readFile(std::string filename) {
+  std::ifstream ifs(filename, std::ios::binary);
+  std::string result, line;
+  while (std::getline(ifs, line))
+    result += line + "\n";
 
-const char *vertexShaderSource =
-"#version 330 core\n"
-"layout (location = 0) in vec3 pos;\n"
-"uniform mat4 model;\n"
-"uniform mat4 view;\n"
-"uniform mat4 projection;\n"
-"\n"
-"void main()\n"
-"{\n"
-"    gl_Position = projection * view * model * vec4(pos, 1.0);\n"
-"}\n";
-
-const char *fragmentShaderSource =
-"#version 330 core\n"
-"out vec4 FragColor;\n"
-"\n"
-"void main()\n"
-"{\n"
-"    FragColor = vec4(1.0f, 1.0f, 1.0f, 1.0f);\n"
-"}\n";
-
-std::vector<float> vertices;
-std::vector<GLuint> indices;
-
-
-void load(const std::string &filename, std::vector<float> &vertices, std::vector<GLuint> &indices) {
+  return result;
+}
+
+model loadModel(const std::string &filename) {
   Assimp::Importer importer;
 
   const aiScene *scene = importer.ReadFile(
-      filename,
-      aiProcess_CalcTangentSpace |
-      aiProcess_Triangulate |
-      aiProcess_JoinIdenticalVertices |
-      aiProcess_SortByPType
-  );
+      filename, aiProcess_CalcTangentSpace | aiProcess_Triangulate |
+                    aiProcess_SortByPType | aiProcess_GenSmoothNormals);
+
+  model result;
 
   for (int i = 0; i < scene->mMeshes[0]->mNumVertices; i++) {
     aiVector3D v = scene->mMeshes[0]->mVertices[i];
-    vertices.push_back(v.x);
-    vertices.push_back(v.y);
-    vertices.push_back(v.z);
+    aiVector3D n = scene->mMeshes[0]->mNormals[i];
+    result.vertices.push_back(v.x);
+    result.vertices.push_back(v.y);
+    result.vertices.push_back(v.z);
+    result.vertices.push_back(n.x);
+    result.vertices.push_back(n.y);
+    result.vertices.push_back(n.z);
   }
 
   for (int i = 0; i < scene->mMeshes[0]->mNumFaces; i++) {
     aiFace f = scene->mMeshes[0]->mFaces[i];
     for (int j = 0; j < f.mNumIndices; j++) {
-      indices.push_back(f.mIndices[j]);
+      result.indices.push_back(f.mIndices[j]);
     }
   }
+
+  return result;
 }
 
+GLuint compileShaders(const char *vertFilename, const char *fragFilename) {
+  GLuint vertShader = glCreateShader(GL_VERTEX_SHADER);
+  std::string vertSource = readFile(vertFilename);
+  const char *vertAddr = vertSource.c_str();
+  glShaderSource(vertShader, 1, &vertAddr, NULL);
+  glCompileShader(vertShader);
+
+  int success;
+  char infoLog[512];
+  glGetShaderiv(vertShader, GL_COMPILE_STATUS, &success);
+  if (!success) {
+    glGetShaderInfoLog(vertShader, 512, NULL, infoLog);
+    printf("Error compiling vertex shader(%s): %s\n", vertFilename, infoLog);
+  }
+
+  GLuint fragShader = glCreateShader(GL_FRAGMENT_SHADER);
+  std::string fragSource = readFile(fragFilename);
+  const char *fragAddr = fragSource.c_str();
+  glShaderSource(fragShader, 1, &fragAddr, NULL);
+  glCompileShader(fragShader);
+
+  glGetShaderiv(fragShader, GL_COMPILE_STATUS, &success);
+  if (!success) {
+    glGetShaderInfoLog(fragShader, 512, NULL, infoLog);
+    printf("Error compiling fragment shader(%s): %s\n", fragFilename, infoLog);
+  }
+
+  // Link Shader Program
+
+  GLuint shaderProgram = glCreateProgram();
+  glAttachShader(shaderProgram, vertShader);
+  glAttachShader(shaderProgram, fragShader);
+  glLinkProgram(shaderProgram);
+
+  glGetProgramiv(shaderProgram, GL_LINK_STATUS, &success);
+  if (!success) {
+    glGetProgramInfoLog(shaderProgram, 512, NULL, infoLog);
+    printf("Error linking shader program: %s\n", infoLog);
+  }
+
+  glDeleteShader(vertShader);
+  glDeleteShader(fragShader);
+
+  return shaderProgram;
+}
+
+
 int main() {
   // Window Setup
 
+  const int width = 1600, height = 900;
+
   sf::ContextSettings settings;
   settings.depthBits = 24;
   settings.antialiasingLevel = 0;
   settings.majorVersion = 4;
   settings.minorVersion = 6;
 
-  sf::Window window(sf::VideoMode(800, 600), "Subsurface Scattering",
+  sf::RenderWindow window(sf::VideoMode(1600, 900), "Subsurface Scattering",
                     sf::Style::Default, settings);
   window.setVerticalSyncEnabled(true);
 
-  window.setActive(true);
+  ImGui::SFML::Init(window);
 
   // Initialize GLEW
 
   if (glewInit() != GLEW_OK) {
-
   }
 
-  load("models/Isotrop-upperjaw.ply", vertices, indices);
+  GLuint shaderProgram = compileShaders("shaders/vert.glsl", "shaders/frag.glsl");
 
-  // Compile Shaders
+  model m = loadModel("models/Isotrop-upperjaw.ply");
 
-  GLuint vertexShader = glCreateShader(GL_VERTEX_SHADER);
-  glShaderSource(vertexShader, 1, &vertexShaderSource, NULL);
-  glCompileShader(vertexShader);
+  arccam arcCam;
+  freecam freeCam;
+      
+  glm::vec3 lightPos(1.2f, 5.0f, 2.0f);
 
-  int  success;
-  char infoLog[512];
-  glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &success);
-  if (!success) {
-      glGetShaderInfoLog(vertexShader, 512, NULL, infoLog);
-      printf("Error compiling vertex shader: %s\n", infoLog);
-  }
+  // MVP
 
-  GLuint fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
-  glShaderSource(fragmentShader, 1, &fragmentShaderSource, NULL);
-  glCompileShader(fragmentShader);
+  glm::mat4 model = glm::scale(glm::mat4(1.0f), glm::vec3(0.01f, 0.01f, 0.01f));
 
-  glGetShaderiv(fragmentShader, GL_COMPILE_STATUS, &success);
-  if (!success) {
-      glGetShaderInfoLog(fragmentShader, 512, NULL, infoLog);
-      printf("Error compiling fragment shader: %s\n", infoLog);
-  }
+  glm::mat4 view;
 
-  // Link Shader Program
+  glm::mat4 proj = glm::perspective(glm::radians(45.0f), (float)window.getSize().x / window.getSize().y, 0.001f, 1000.0f);
 
-  GLuint shaderProgram = glCreateProgram();
-  glAttachShader(shaderProgram, vertexShader);
-  glAttachShader(shaderProgram, fragmentShader);
-  glLinkProgram(shaderProgram);
+  // Framebuffer
+  GLuint fbo;
+  glGenFramebuffers(1, &fbo);
+  glBindFramebuffer(GL_FRAMEBUFFER, fbo);
   
-  glGetProgramiv(shaderProgram, GL_LINK_STATUS, &success);
-  if (!success) {
-      glGetProgramInfoLog(shaderProgram, 512, NULL, infoLog);
-      printf("Error linking shader program: %s\n", infoLog);
+  GLuint renderTexture;
+  glGenTextures(1, &renderTexture);
+  glBindTexture(GL_TEXTURE_2D, renderTexture);
+  glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+  //glBindTexture(GL_TEXTURE_2D, 0);
+  glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, renderTexture, 0);
+
+  GLuint rbo;
+  glGenRenderbuffers(1, &rbo);
+  glBindRenderbuffer(GL_RENDERBUFFER, rbo);
+  glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, width, height);
+  //glBindRenderbuffer(GL_RENDERBUFFER, 0);
+  glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, rbo);
+
+  if (glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE) {
+    printf("Successfully created framebuffer\n");
   }
+  glBindFramebuffer(GL_FRAMEBUFFER, 0);
+  
+  GLuint screenShaderProgram = compileShaders("shaders/fbo_vert.glsl", "shaders/fbo_frag.glsl");
+  glUseProgram(screenShaderProgram);
+  glUniform1i(glGetUniformLocation(screenShaderProgram, "screenTexture"), 0);
 
-  glDeleteShader(vertexShader);
-  glDeleteShader(fragmentShader);
-
-  // Create VBO
-
-  GLuint VBO;
-  glGenBuffers(1, &VBO);
+  // Screen VAO
+  
+  GLuint screenVBO;
+  glGenBuffers(1, &screenVBO);
 
-  // Create EBO
+  GLuint screenVAO;
+  glGenVertexArrays(1, &screenVAO);
 
-  GLuint EBO;
-  glGenBuffers(1, &EBO);
-  
-  // Create VAO
+  glBindVertexArray(screenVAO);
 
-  GLuint VAO;
-  glGenVertexArrays(1, &VAO);
+  float screenVerts[] = {
+    -1.0f, +1.0f, +0.0f, +1.0f,
+    -1.0f, -1.0f, +0.0f, +0.0f,
+    +1.0f, -1.0f, +1.0f, +0.0f,
+ 
+    -1.0f, +1.0f, +0.0f, +1.0f,
+    +1.0f, -1.0f, +1.0f, +0.0f,
+    +1.0f, +1.0f, +1.0f, +1.0f,
+  };
 
-  glBindVertexArray(VAO);
-  
-  glBindBuffer(GL_ARRAY_BUFFER, VBO);
-  glBufferData(GL_ARRAY_BUFFER, sizeof(float) * vertices.size(), vertices.data(), GL_STATIC_DRAW);
-  
-  glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
-  glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(GLuint) * indices.size(), indices.data(), GL_STATIC_DRAW);
+  glBindBuffer(GL_ARRAY_BUFFER, screenVBO);
+  glBufferData(GL_ARRAY_BUFFER, sizeof(float) * 6 * 4,
+              screenVerts, GL_STATIC_DRAW);
 
-  glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(float) * 3, NULL);
   glEnableVertexAttribArray(0);
+  glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, sizeof(float) * 4, (void*)(0));
+  glEnableVertexAttribArray(1);
+  glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(float) * 4, (void*)(sizeof(float) * 2));
 
   glBindVertexArray(0);
 
-  // Perspective
-
-  glm::mat4 model = glm::mat4(1.0f);
+  // Config
 
-  glm::mat4 view = glm::translate(glm::mat4(1.0f), glm::vec3(0.0f, 0.0f, -200.0f));
+  struct {
+    bool wireframe = false;
+    bool freecam = false;
+  } options;
 
-  glm::mat4 proj = glm::perspective(glm::radians(45.0f), 800.0f / 600.0f, 0.1f, 1000.0f);
+  sf::Clock deltaClock;
 
-  bool wireframe = false;
+  bool prevMouse = false;
 
   bool running = true;
   while (running) {
+    // Events
+
     sf::Event event;
     while (window.pollEvent(event)) {
-      if (event.type == sf::Event::Closed) {
+      ImGui::SFML::ProcessEvent(event);
+
+      if (event.type == sf::Event::EventType::Closed) {
         running = false;
-      } else if (event.type == sf::Event::Resized) {
+      } else if (event.type == sf::Event::EventType::Resized) {
         glViewport(0, 0, event.size.width, event.size.height);
-      } else if (event.type == sf::Event::KeyReleased) {
+      } else if (event.type == sf::Event::EventType::KeyReleased) {
         using keys = sf::Keyboard;
         switch (event.key.code) {
-        case keys::W:
-          wireframe = !wireframe;
-          break;
         case keys::Escape:
           running = false;
           break;
         }
+      } else if (event.type == sf::Event::EventType::MouseWheelScrolled) {
+        if (! options.freecam) {
+          arcCam.radius -= event.mouseWheelScroll.delta / 5.0f;
+        }
       }
     }
 
-    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+    // Update
+
+    if (sf::Mouse::isButtonPressed(sf::Mouse::Right)) {
+      window.setMouseCursorVisible(false);
 
+      if (prevMouse) {
+        if (options.freecam)
+          freeCam.update(window);
+        else
+          arcCam.update(window);
+      }
+
+
+      sf::Mouse::setPosition(sf::Vector2i(
+          window.getSize().x / 2,
+          window.getSize().y / 2
+        ), window);  
+    } else {
+      window.setMouseCursorVisible(true);
+    }
+
+    prevMouse = sf::Mouse::isButtonPressed(sf::Mouse::Right);
+
+    // Render to fbo
+
+    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+    glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
     glEnable(GL_DEPTH_TEST);
 
-    if (wireframe)
+    if (options.wireframe)
       glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
     else
       glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
 
-    model = glm::rotate(model, glm::radians(0.2f), glm::vec3(0.0f, 1.0f, 0.0f));
-
-    glUniformMatrix4fv(glGetUniformLocation(shaderProgram, "model"), 1, GL_FALSE, glm::value_ptr(model));
-    glUniformMatrix4fv(glGetUniformLocation(shaderProgram, "view"), 1, GL_FALSE, glm::value_ptr(view));
-    glUniformMatrix4fv(glGetUniformLocation(shaderProgram, "projection"), 1, GL_FALSE, glm::value_ptr(proj));
-
     glUseProgram(shaderProgram);
-    glBindVertexArray(VAO);
-    glDrawElements(GL_TRIANGLES, indices.size(), GL_UNSIGNED_INT, 0);
+    
+    if (options.freecam)
+      view = freeCam.getViewMatrix();
+    else
+      view = arcCam.getViewMatrix();
+    
+    glUniformMatrix4fv(
+      glGetUniformLocation(shaderProgram, "model"),
+      1, GL_FALSE, glm::value_ptr(model));
+    glUniformMatrix4fv(
+      glGetUniformLocation(shaderProgram, "view"),
+      1, GL_FALSE, glm::value_ptr(view));
+    glUniformMatrix4fv(
+      glGetUniformLocation(shaderProgram, "projection"),
+      1, GL_FALSE, glm::value_ptr(proj));
+
+    glUniform3f(
+      glGetUniformLocation(shaderProgram, "objectColor"),
+      1.0f, 0.5f, 0.31f);
+    glUniform3f(
+      glGetUniformLocation(shaderProgram, "lightColor"),
+      1.0f, 1.0f, 1.0f);
+    glUniform3fv(
+      glGetUniformLocation(shaderProgram, "lightPos"),
+      1, glm::value_ptr(lightPos));
+    glUniform3fv(
+      glGetUniformLocation(shaderProgram, "viewPos"),
+      1, glm::value_ptr(options.freecam ? freeCam.pos : arcCam.getPos()));
+
+    m.draw();
+
+    // Render fbo to screen
+    
+    glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
+
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+    glDisable(GL_DEPTH_TEST);
+    glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
+    glClear(GL_COLOR_BUFFER_BIT);
+    glUseProgram(screenShaderProgram);
+
+    glBindVertexArray(screenVAO);
+    glBindTexture(GL_TEXTURE_2D, renderTexture);
+    glDrawArrays(GL_TRIANGLES, 0, 6);
     glBindVertexArray(0);
 
+    ImGui::SFML::Update(window, deltaClock.restart());
+
+    ImGui::Begin("Options");
+    ImGui::Checkbox("Wireframe", &options.wireframe);
+    ImGui::Checkbox("Free Cam", &options.freecam);
+    if (options.freecam) {
+      ImGui::LabelText("Position", "%f %f %f", freeCam.pos.x, freeCam.pos.y, freeCam.pos.z);
+      ImGui::LabelText("Rotation", "%f %f", freeCam.rot.x, freeCam.rot.y);
+      if (ImGui::Button("Reset")) {
+        freeCam.pos = glm::vec3(0, 0, -1);
+        freeCam.rot = glm::vec2(0);
+      }
+    } else {
+      ImGui::LabelText("Rotation", "%f %f", arcCam.rot.x, arcCam.rot.y);
+      ImGui::DragFloat("Radius", &arcCam.radius, 0.01f, -1.0f, 1.0f);
+      if (ImGui::Button("Reset")) {
+        arcCam.rot = glm::vec2(0);
+        arcCam.radius = 1;
+      }
+    }
+    ImGui::End();
+
+    ImGui::SFML::Render(window);
+
     window.display();
   }
 
+  glDeleteFramebuffers(1, &fbo);
+
   return 0;
 }
\ No newline at end of file