added models and stuff

.gitmodules

@@ -7,6 +7,9 @@
 [submodule "_ThirdParty/assimp"]
 	path = _ThirdParty/assimp
 	url = https://github.com/assimp/assimp.git
-[submodule "glm"]
-	path = glm
+[submodule "_ThirdParty/glm"]
+	path = _ThirdParty/glm
 	url = https://github.com/g-truc/glm.git
+[submodule "_ThirdParty/entt"]
+	path = _ThirdParty/entt
+	url = https://github.com/skypjack/entt.git

CMakeLists.txt

@@ -17,14 +17,15 @@ add_subdirectory(_ThirdParty/spdlog)
 set (ASSIMP_INSTALL OFF)
 add_subdirectory(_ThirdParty/assimp)
 
-add_subdirectory(glm)
+add_subdirectory(_ThirdParty/glm)
+
+add_subdirectory(_ThirdParty/entt)
 
 add_executable(${PROJECT_NAME}
         src/main.cpp
         ${GLAD_SOURCE_DIR}/gl.c
         src/Mesh.cpp
         src/Mesh.h
-        src/Model.cpp
         src/Model.h
         src/Material.h
         src/ModelManager.cpp
@@ -39,7 +40,10 @@ add_executable(${PROJECT_NAME}
         src/FreeCamera.cpp
         src/FreeCamera.h
         src/InputManager.cpp
-        src/InputManager.h)
+        src/InputManager.h
+        src/Components.h
+        src/Scene.cpp
+        src/Scene.h)
 
 add_custom_target(copy_resources
         COMMAND ${CMAKE_COMMAND} -E copy_directory
@@ -48,5 +52,5 @@ add_custom_target(copy_resources
         COMMENT "Copying resources..."
 )
 
-target_link_libraries(${PROJECT_NAME} glfw spdlog assimp glm)
+target_link_libraries(${PROJECT_NAME} glfw spdlog assimp glm EnTT)
 target_include_directories(${PROJECT_NAME} PRIVATE ${ASSIMP_INCLUDE_INSTALL_DIR})

resources/backpack/backpack.mtl

@@ -1,16 +0,0 @@
-# Blender MTL File: 'None'
-# Material Count: 1
-
-newmtl Scene_-_Root
-Ns 225.000000
-Ka 1.000000 1.000000 1.000000
-Kd 0.800000 0.800000 0.800000
-Ks 0.500000 0.500000 0.500000
-Ke 0.0 0.0 0.0
-Ni 1.450000
-d 1.000000
-illum 2
-map_Kd diffuse.jpg
-map_Bump normal.png
-map_Ks specular.jpg
-

resources/backpack/source_attribution.txt

@@ -1,3 +0,0 @@
-Model by Berk Gedik, from: https://sketchfab.com/3d-models/survival-guitar-backpack-low-poly-799f8c4511f84fab8c3f12887f7e6b36
-
-Modified material assignment (Joey de Vries) for easier load in OpenGL model loading chapter, and renamed albedo to diffuse and metallic to specular to match non-PBR lighting setup.

resources/c4/C4Fixed.mtl

@@ -0,0 +1,12 @@
+# Blender 3.6.0 MTL File: 'None'
+# www.blender.org
+
+newmtl 01_-_Default.001
+Ns 10.000005
+Ka 1.000000 1.000000 1.000000
+Ks 0.000000 0.000000 0.000000
+Ke 0.000000 0.000000 0.000000
+Ni 1.450000
+d 1.000000
+illum 1
+map_Kd Corvette_C4_Base_Color.png

resources/standard.frag

@@ -29,6 +29,7 @@ void main() {
     vec3 norm = normalize(Normal);
     vec3 lightDir = normalize(-lightDirection);
     vec3 viewDir = normalize(viewPosition - Position);
+    vec3 halfwayDir = normalize(lightDir + viewDir);
 
     vec3 ambient = lightAmbient * (diffuseColor * phongAmbient);
 
@@ -37,9 +38,11 @@ void main() {
 
     vec3 reflectDir = reflect(-lightDir, norm);
     float effectiveShininess = max(phongShininess, 1.0);
-    float spec = pow(max(dot(viewDir, reflectDir), 0.0), effectiveShininess);
+    float spec = pow(max(dot(norm, halfwayDir), 0.0), effectiveShininess);
     vec3 specular = lightSpecular * (spec * specularColor * phongSpecular);
 
     vec3 result = ambient + diffuse + specular;
-    FragColor = vec4(result, 1.0);
+
+    float gamma = 2.2;
+    FragColor.rgb = pow(result.rgb, vec3(1.0/gamma));
 }

src/Components.h

@@ -0,0 +1,33 @@
+//
+// Created by slinky on 5/7/26.
+//
+
+#ifndef B_ENGINE_COMPONENTS_H
+#define B_ENGINE_COMPONENTS_H
+
+#include <vector>
+
+#include "Model.h"
+
+#include "entt/entt.hpp"
+#include "glm/glm.hpp"
+
+namespace Components {
+    struct Transform {
+        glm::vec3 position;
+        glm::vec3 rotation;
+        glm::vec3 scale;
+    };
+
+    struct Relationship {
+        entt::entity entity;
+        std::vector<entt::entity> children;
+    };
+
+    struct Drawable {
+        std::shared_ptr<Model> model;
+    };
+}
+
+
+#endif //B_ENGINE_COMPONENTS_H

src/InputManager.cpp

@@ -7,15 +7,14 @@
 bool InputManager::mouseInit = false;
 float InputManager::lastMousePositionX = 0;
 float InputManager::lastMousePositionY = 0;
-std::unordered_map<std::string, std::unique_ptr<InputAction>> InputManager::registeredActions = {};
 
+std::unordered_map<std::string, std::unique_ptr<InputAction>> registeredActions = {};
 static bool currentKeyStatesData[512] = {};
-bool* InputManager::currentKeyStates = currentKeyStatesData;
-
 static bool previousKeyStatesData[512] = {};
-bool* InputManager::previousKeyStates = previousKeyStatesData;
 
-std::vector<MouseDeltaCallback> InputManager::mouse_listeners = {};
+static std::vector<MouseDeltaCallback> mouse_listeners = {};
+
+static void set_key_state(int key, bool state);
 
 void InputManager::mouse_pos_callback(GLFWwindow *window, double x, double y) {
     const auto xpos = static_cast<float>(x);
@@ -112,7 +111,7 @@ bool InputManager::key_held(int key) {
     return previousKeyStatesData[key] && currentKeyStatesData[key];
 }
 
-void InputManager::set_key_state(int key, bool state) {
+void set_key_state(int key, bool state) {
     previousKeyStatesData[key] = currentKeyStatesData[key];
     currentKeyStatesData[key] = state;
 }

src/InputManager.h

@@ -36,11 +36,6 @@ public:
     static float lastMousePositionX;
     static float lastMousePositionY;
 
-    static bool* currentKeyStates;
-    static bool* previousKeyStates;
-
-    static std::unordered_map<std::string, std::unique_ptr<InputAction>> registeredActions;
-
     static void mouse_pos_callback(GLFWwindow* window, double x, double y);
     static void add_mouse_listener(MouseDeltaCallback callback);
 
@@ -53,9 +48,6 @@ public:
     static bool key_released(int key);
     static bool key_down(int key);
     static bool key_up(int key);
-private:
-    static std::vector<MouseDeltaCallback> mouse_listeners;
-    static void set_key_state(int key, bool state);
 };
 
 #endif //B_ENGINE_INPUTMANAGER_H

src/Model.cpp

@@ -1,5 +0,0 @@
-//
-// Created by lbmas on 4/28/2026.
-//
-
-#include "Model.h"

src/Model.h

@@ -5,17 +5,24 @@
 #ifndef B_ENGINE_MODEL_H
 #define B_ENGINE_MODEL_H
 
-#include <string_view>
 #include <vector>
 #include <filesystem>
 
 #include "Mesh.h"
 #include "Material.h"
 
+struct ModelNode {
+    glm::mat4 transform{};
+    std::vector<unsigned int> meshIndices{};
+    std::vector<ModelNode> children{};
+};
+
 struct Model
 {
-    std::vector<std::shared_ptr<Mesh>> meshes;
-    std::vector<std::shared_ptr<Material>> materials;
+    std::vector<std::shared_ptr<Mesh>> meshes{};
+    std::vector<std::shared_ptr<Material>> materials{};
+
+    ModelNode root{};
 };
 
 #endif //B_ENGINE_MODEL_H

src/ModelManager.cpp

@@ -17,10 +17,11 @@
 
 std::unordered_map<std::string, std::shared_ptr<Model>> ModelManager::models;
 
-void process_ai_mesh(aiMesh* aiMesh, const aiScene* scene, glm::mat4 transform, Mesh& mesh);
-void process_ai_node(aiNode* node, const aiScene* scene, glm::mat4 transform, Model* model);
+void process_ai_node(aiNode* node, const aiScene* scene, glm::mat4 transform, ModelNode& model);
 
-void process_ai_material(aiMaterial* aiMat, const aiScene* scene, Material& mat, const std::filesystem::path& modelDirectory);
+void process_ai_mesh(const aiMesh* aiMesh, Mesh& mesh);
+
+void process_ai_material(const aiMaterial* aiMat, Material& mat, const std::filesystem::path& modelDirectory);
 void process_ai_material_diffuse(const aiMaterial *aiMat, Material& mat, const std::filesystem::path& modelDirectory);
 void process_ai_material_specular(const aiMaterial *aiMat, Material& mat, const std::filesystem::path& modelDirectory);
 
@@ -38,7 +39,7 @@ std::shared_ptr<Model> ModelManager::load_from_file(std::string_view _path, bool
     const aiScene* scene = importer.ReadFile(_path.data(),
                                              aiProcess_Triangulate |
                                              aiProcess_GenSmoothNormals |
-                                             aiProcess_FlipUVs);
+                                             aiProcess_RemoveRedundantMaterials);
 
     if (!scene || scene->mFlags & AI_SCENE_FLAGS_INCOMPLETE || !scene->mRootNode)
     {
@@ -48,14 +49,25 @@ std::shared_ptr<Model> ModelManager::load_from_file(std::string_view _path, bool
 
     auto model = std::make_shared<Model>();
 
-    std::filesystem::path modelPath = {_path};
-
-    model->materials.resize(scene->mNumMaterials);
+    const std::filesystem::path modelPath = {_path};
     for (unsigned int i = 0; i < scene->mNumMaterials; i++) {
         aiMaterial* aiMat = scene->mMaterials[i];
+        aiString matName;
+        if (aiMat->Get(AI_MATKEY_NAME, matName) && strcmp(matName.data, "DefaultMaterial") == 0) {
+            continue;
+        }
         Material mat{};
-        process_ai_material(aiMat, scene, mat, modelPath.parent_path());
-        model->materials[i] = std::make_shared<Material>(mat);
+        process_ai_material(aiMat, mat, modelPath.parent_path());
+        model->materials.push_back(std::make_shared<Material>(mat));
+    }
+
+    model->meshes.resize(scene->mNumMeshes);
+    for (unsigned int i = 0; i < scene->mNumMeshes; i++) {
+        aiMesh* aiMesh = scene->mMeshes[i];
+        Mesh mesh{};
+        mesh.materialId = aiMesh->mMaterialIndex;
+        process_ai_mesh(aiMesh, mesh);
+        model->meshes.push_back(std::make_shared<Mesh>(mesh));
     }
 
     auto transform = glm::identity<glm::mat4>();
@@ -63,32 +75,31 @@ std::shared_ptr<Model> ModelManager::load_from_file(std::string_view _path, bool
         transform = zUpMatrix;
     }
 
-    process_ai_node(scene->mRootNode, scene, transform, model.get());
+    process_ai_node(scene->mRootNode, scene, transform, model->root);
 
     return model;
 }
 
-void process_ai_node(aiNode* node, const aiScene* scene, glm::mat4 transform, Model* model)
+void process_ai_node(aiNode* aiNode, const aiScene* scene, glm::mat4 transform, ModelNode* node)
 {
-    const auto t = node->mTransformation;
+    const auto t = aiNode->mTransformation;
     transform = transform * glm::mat4(t.a1, t.a2, t.a3, t.a4, t.b1, t.b2, t.b3, t.b4, t.c1, t.c2, t.c3, t.c4, t.d1, t.d2, t.d3, t.d4);
 
-    for (unsigned int i = 0; i < node->mNumMeshes; i++)
-    {
-        aiMesh* aiMesh = scene->mMeshes[node->mMeshes[i]];
-        Mesh mesh{};
-        mesh.materialId = aiMesh->mMaterialIndex;
-        process_ai_mesh(aiMesh, scene, transform, mesh);
-        model->meshes.push_back(std::make_shared<Mesh>(mesh));
+    node->transform = transform;
+
+    for (unsigned int i = 0; i < aiNode->mNumMeshes; i++) {
+        node->meshIndices.push_back(aiNode->mMeshes[i]);
     }
 
-    for (unsigned int i = 0; i < node->mNumChildren; i++)
+    for (unsigned int i = 0; i < aiNode->mNumChildren; i++)
     {
-        process_ai_node(node->mChildren[i], scene, transform, model);
+        ModelNode newNode{};
+        process_ai_node(aiNode->mChildren[i], scene, transform, newNode);
+        node->children.push_back(newNode);
     }
 }
 
-void process_ai_mesh(aiMesh* aiMesh, const aiScene* scene, glm::mat4 transform, Mesh& mesh)
+void process_ai_mesh(const aiMesh* aiMesh, Mesh& mesh)
 {
     auto positions = std::vector<float>(aiMesh->mNumVertices * 3);
     auto uvs = std::vector<float>(aiMesh->mNumVertices * 2);
@@ -97,7 +108,7 @@ void process_ai_mesh(aiMesh* aiMesh, const aiScene* scene, glm::mat4 transform,
 
     for (unsigned int i = 0; i < aiMesh->mNumVertices; i++)
     {
-        auto position = transform * glm::vec4(aiMesh->mVertices[i].x, aiMesh->mVertices[i].y, aiMesh->mVertices[i].z, 1.0f);
+        auto position = glm::vec4(aiMesh->mVertices[i].x, aiMesh->mVertices[i].y, aiMesh->mVertices[i].z, 1.0f);
         positions[3 * i] = position.x;
         positions[3 * i + 1] = position.y;
         positions[3 * i + 2] = position.z;
@@ -138,7 +149,7 @@ void process_ai_mesh(aiMesh* aiMesh, const aiScene* scene, glm::mat4 transform,
     mesh = {positions, uvs, normals, indices};
 }
 
-void process_ai_material(aiMaterial* aiMat, const aiScene* scene, Material& mat, const std::filesystem::path& modelDirectory) {
+void process_ai_material(const aiMaterial* aiMat, Material& mat, const std::filesystem::path& modelDirectory) {
     aiString matName;
     aiReturn ret = aiMat->Get(AI_MATKEY_NAME, matName);
     if (ret != AI_SUCCESS) {

src/Scene.cpp

@@ -0,0 +1,10 @@
+//
+// Created by slinky on 5/7/26.
+//
+
+#include "Scene.h"
+
+entt::entity Scene::create_game_obejct() {
+    const entt::entity entity =  _registry.create();
+    return entity;
+}

src/Scene.h

@@ -0,0 +1,20 @@
+//
+// Created by slinky on 5/7/26.
+//
+
+#ifndef B_ENGINE_SCENE_H
+#define B_ENGINE_SCENE_H
+
+#include "entt/entt.hpp"
+
+class Scene {
+public:
+    Scene() = default;
+    ~Scene() = default;
+
+    entt::entity create_game_obejct();
+private:
+    entt::registry _registry{};
+};
+
+#endif //B_ENGINE_SCENE_H

src/main.cpp

@@ -7,6 +7,8 @@
 #include "glm/ext/matrix_clip_space.hpp"
 #include "glm/ext/matrix_transform.hpp"
 
+#include "entt/entt.hpp"
+
 #define STB_IMAGE_IMPLEMENTATION
 #include "FreeCamera.h"
 #include "InputManager.h"
@@ -32,6 +34,8 @@ float gMouseSensitivity = 0.1f;
 
 FreeCamera gCamera {};
 
+entt::registry gRegistry{};
+
 void glfw_error_callback(int error, const char* description);
 void glfw_key_callback(GLFWwindow* window, int key, int scancode, int action, int mods);
 void glfw_framebuffer_size_callback(GLFWwindow* window, int width, int height);
@@ -42,6 +46,8 @@ void load_gl();
 void init_camera();
 void load_default_textures();
 void load_shaders();
+void load_inputs();
+void load_default_models();
 void loop();
 
 std::shared_ptr<Model> load_model(std::string_view _path);
@@ -67,18 +73,9 @@ int main() {
 
     load_shaders();
 
-    InputManager::generate_input_action("move_forward", {{GLFW_KEY_W, KEY_DOWN}});
-    InputManager::generate_input_action("move_backward", {{GLFW_KEY_S, KEY_DOWN}});
-    InputManager::generate_input_action("move_right", {{GLFW_KEY_D, KEY_DOWN}});
-    InputManager::generate_input_action("move_left", {{GLFW_KEY_A, KEY_DOWN}});
+    load_inputs();
 
-    InputManager::generate_input_action("exit_application", {{GLFW_KEY_ESCAPE, KEY_DOWN}});
-
-    spdlog::info("loading models");
-    ModelManager::models["cube"] = ModelManager::load_from_file("./resources/cube.obj");
-    ModelManager::models["backpack"] = ModelManager::load_from_file("./resources/backpack/backpack.obj");
-    ModelManager::models["male"] = ModelManager::load_from_file("./resources/male.obj");
-    spdlog::info("done");
+    load_default_models();
 
     loop();
 
@@ -132,7 +129,9 @@ void create_main_window()
 
     glfwSetFramebufferSizeCallback(gWindow, glfw_framebuffer_size_callback);
 
+#ifndef GLFW_CONTEXT_DEBUG
     glfwSetInputMode(gWindow, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
+#endif
 }
 
 void load_gl()
@@ -183,19 +182,33 @@ void load_shaders() {
     }
 }
 
+void load_inputs() {
+    InputManager::generate_input_action("move_forward", {{GLFW_KEY_W, KEY_DOWN}});
+    InputManager::generate_input_action("move_backward", {{GLFW_KEY_S, KEY_DOWN}});
+    InputManager::generate_input_action("move_right", {{GLFW_KEY_D, KEY_DOWN}});
+    InputManager::generate_input_action("move_left", {{GLFW_KEY_A, KEY_DOWN}});
+    InputManager::generate_input_action("move_up", {{GLFW_KEY_SPACE, KEY_DOWN}});
+    InputManager::generate_input_action("move_down", {{GLFW_KEY_LEFT_SHIFT, KEY_DOWN}});
+    InputManager::generate_input_action("exit_application", {{GLFW_KEY_ESCAPE, KEY_DOWN}});
+}
+
+void load_default_models() {
+    spdlog::info("loading default models");
+    ModelManager::models["cube"] = ModelManager::load_from_file("./resources/cube.obj");
+    ModelManager::models["vette"] = ModelManager::load_from_file("./resources/c4/C4Fixed.obj");
+    ModelManager::models["male"] = ModelManager::load_from_file("./resources/male.obj");
+}
+
 void loop() {
     std::shared_ptr<Texture> defaultDiffuse = TextureManager::textures["default_diffuse"];
     std::shared_ptr<Texture> defaultSpecular = TextureManager::textures["default_specular"];
+    std::shared_ptr<ShaderProgram> shader = ShaderManager::shaders["phong_shader"];
 
+    const auto vette = ModelManager::models["vette"];
     auto model = glm::identity<glm::mat4>();
+    model = glm::scale(model, glm::vec3(.1f, .1f, .1f));
 
-    ShaderProgram* shader = ShaderManager::shaders["phong_shader"].get();
-
-    const auto cube = ModelManager::models["cube"];
-    const auto backpack = ModelManager::models["backpack"];
-    const auto male = ModelManager::models["male"];
-
-    const auto& activeModel = backpack;
+    const auto& activeModel = vette;
 
     while (!glfwWindowShouldClose(gWindow)) {
         glfwPollEvents();
@@ -222,6 +235,14 @@ void loop() {
             gCamera.move(CAMERA_MOVEMENT::RIGHT, .05);
         }
 
+        if (InputManager::check_action_performed("move_up")) {
+            gCamera.move(CAMERA_MOVEMENT::UP, .05);
+        }
+
+        if (InputManager::check_action_performed("move_down")) {
+            gCamera.move(CAMERA_MOVEMENT::DOWN, .05);
+        }
+
         // gl frame prep
         glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
@@ -237,18 +258,18 @@ void loop() {
             shader->setVec3("viewPosition", gCamera.position());
 
             shader->setVec3("lightPosition", glm::vec3{-2.f, 0, 2.0f});
-            shader->setVec3("lightDirection", glm::vec3(1, -1, -1));
+            shader->setVec3("lightDirection", glm::vec3(1, -1, 1));
             shader->setVec3("lightAmbient",   glm::vec3(0.3f, 0.3f, 0.3f));
             shader->setVec3("lightDiffuse",   glm::vec3(0.5f, 0.5f, 0.5f));
             shader->setVec3("lightSpecular",  glm::vec3(1.0f, 1.0f, 1.0f));
 
             for (const auto& mesh: activeModel->meshes) {
-                unsigned int materialId = mesh->materialId;
+                unsigned int materialId = 0;
                 if (materialId >= activeModel->materials.size()) {
                     materialId = 0;
                 }
 
-                const std::shared_ptr<Material> mat = activeModel->materials[1];
+                const std::shared_ptr<Material> mat = activeModel->materials[materialId];
 
                 shader->setVec3("phongAmbient",  mat->phong.ambient);
                 shader->setVec3("phongDiffuse",  mat->phong.diffuse);