Basic GUI

.gitignore

@@ -17,6 +17,7 @@
 mono_crash.*
 
 # Build results
+build/
 [Dd]ebug/
 [Dd]ebugPublic/
 [Rr]elease/

CMakeLists.txt

@@ -16,11 +16,13 @@ find_package(assimp CONFIG REQUIRED)
 find_package(glfw3 CONFIG REQUIRED)
 find_package(glm CONFIG REQUIRED)
 find_package(Ktx CONFIG REQUIRED)
+find_package(imgui CONFIG REQUIRED)
 
 add_executable(RayTracer "")
 target_include_directories(RayTracer PUBLIC src/)
 target_link_libraries(RayTracer PUBLIC assimp::assimp)
 target_link_libraries(RayTracer PUBLIC glfw)
+target_link_libraries(RayTracer PUBLIC imgui::imgui)
 if(APPLE)
 target_link_libraries(RayTracer PUBLIC GLEW::GLEW)
 else()

CMakeSettings.json

@@ -5,7 +5,7 @@
       "generator": "Ninja",
       "configurationType": "Debug",
       "inheritEnvironments": [ "msvc_x64_x64" ],
-      "buildRoot": "${projectDir}\\bin\\${name}",
+      "buildRoot": "${projectDir}\\build",
       "installRoot": "${projectDir}\\out\\install\\${name}",
       "cmakeCommandArgs": "",
       "buildCommandArgs": "",
@@ -16,14 +16,13 @@
       "name": "Release",
       "generator": "Ninja",
       "configurationType": "RelWithDebInfo",
-      "buildRoot": "${projectDir}\\bin\\${name}",
+      "buildRoot": "${projectDir}\\build",
       "installRoot": "${projectDir}\\out\\install\\${name}",
       "cmakeExecutable": "C:/Program Files/CMake/bin/cmake.exe",
       "cmakeCommandArgs": "",
       "buildCommandArgs": "",
       "ctestCommandArgs": "",
-      "inheritEnvironments": [ "msvc_x64_x64" ],
-      "variables": []
+      "inheritEnvironments": [ "msvc_x64_x64" ]
     }
   ]
 }

src/main.cpp

@@ -2,6 +2,8 @@
 #include "scene/Scene.h"
 #include "util/ModelLoader.h"
 #include "window/Window.h"
+#include <iostream>
+#include <imgui.h>
 
 int main()
 {
@@ -19,6 +21,11 @@ int main()
         });
     while (true)
     {
+        window.beginFrame();
+        if (ImGui::Button("Test"))
+        {
+            std::cout << "Test" << std::endl;
+        }
         window.update(scene.getImage());
     }
     return 0;

src/scene/BVH.cpp

@@ -5,6 +5,10 @@
 void BVH::addModel(PModel model, glm::mat4 transform)
 {
     model->boundingBox.transform(transform);
+    for (auto& point : model->positions)
+    {
+        point = glm::vec3(transform * glm::vec4(point, 1));
+    }
     models.push_back(std::move(model));
 }
 
@@ -13,6 +17,10 @@ void BVH::addModels(std::vector<PModel> _models, glm::mat4 transform)
     for (int i = 0; i < _models.size(); ++i)
     {
         _models[i]->boundingBox.transform(transform);
+        for (auto& point : _models[i]->positions)
+        {
+            point = glm::vec3(transform * glm::vec4(point, 1));
+        }
         models.push_back(std::move(_models[i]));
     }
 }

src/scene/Scene.cpp

@@ -21,7 +21,7 @@ void Scene::render(Camera cam, RenderParameter params)
     image.resize(params.width * params.height);
     accumulator.resize(params.width * params.height);
     worker = std::thread(
-        [&]()
+        [&, cam, params]()
         {
             for (int samp = 0; samp < params.numSamples; ++samp)
             {

src/window/Window.cpp

@@ -1,5 +1,8 @@
 #include "Window.h"
 #include <iostream>
+#include <imgui.h>
+#include <imgui_impl_glfw.h>
+#include <imgui_impl_opengl3.h>
 
 #define GLSL(...) "#version 400\n" #__VA_ARGS__
 
@@ -12,13 +15,27 @@ Window::Window(int width, int height) : width(width), height(height)
     glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE); // We don't want the old OpenGL
     window = glfwCreateWindow(width, height, "RayTracer", nullptr, nullptr);
     glfwMakeContextCurrent(window);
+    
+    IMGUI_CHECKVERSION();
+    ImGui::CreateContext();
+    ImGuiIO& io = ImGui::GetIO();
+    io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
+    io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;  // Enable Gamepad Controls
+
+    ImGui_ImplGlfw_InitForOpenGL(window,
+                                 true); // Second param install_callback=true will install GLFW callbacks and chain to existing ones.
+    ImGui_ImplOpenGL3_Init();
+
     glewInit();
+    
     glGenVertexArrays(1, &vao);
     glBindVertexArray(vao);
+    
     glGenTextures(1, &texture);
     glBindTexture(GL_TEXTURE_2D, texture);
     glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_FLOAT, nullptr);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    
     program = glCreateProgram();
     vertShader = glCreateShader(GL_VERTEX_SHADER);
     fragShader = glCreateShader(GL_FRAGMENT_SHADER);
@@ -75,13 +92,22 @@ Window::Window(int width, int height) : width(width), height(height)
 
 Window::~Window() {}
 
-void Window::update(const std::vector<glm::vec3>& textureData)
+void Window::beginFrame()
 {
     glClear(GL_COLOR_BUFFER_BIT);
+    glfwPollEvents();
+    ImGui_ImplOpenGL3_NewFrame();
+    ImGui_ImplGlfw_NewFrame();
+    ImGui::NewFrame();
+}
+
+void Window::update(const std::vector<glm::vec3>& textureData)
+{
     glBindTexture(GL_TEXTURE_2D, texture);
     glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, GL_RGB, GL_FLOAT, textureData.data());
     glUseProgram(program);
     glDrawArrays(GL_TRIANGLES, 0, 3);
+    ImGui::Render();
+    ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
     glfwSwapBuffers(window);
-    glfwPollEvents();
 }

src/window/Window.h

@@ -9,6 +9,7 @@ class Window
   public:
     Window(int width, int height);
     ~Window();
+    void beginFrame();
     void update(const std::vector<glm::vec3>& textureData);
 
   private:

vcpkg.json

@@ -1,3 +1,15 @@
 {
-  "dependencies": ["assimp", "ktx", "glfw3", "glew", "glm", "stb", "fmt"]
+  "dependencies": [
+    {
+      "name": "imgui",
+      "features": [ "glfw-binding", "opengl3-binding" ]
+    },
+    "assimp",
+    "ktx",
+    "glfw3",
+    "glew",
+    "glm",
+    "stb",
+    "fmt"
+  ]
 }