engine/include/sophia/scene.hpp

@@ -4,6 +4,9 @@
 
 namespace sophia {
 
+class Entity;
+class SceneRenderer;  // !TEMP remove this
+
 class Scene {
  public:
   Scene();
@@ -14,6 +17,9 @@ class Scene {
   void setActiveCamera(entt::entity camera) { activeCamera = camera; }
 
  private:
+  friend class Entity;
+  friend class SceneRenderer; // !TEMP remove this
+
   entt::registry registry;
   entt::entity activeCamera = entt::null;
 };

engine/include/sophia/ui/debug_ui.hpp

@@ -17,9 +17,9 @@ class DebugUI {
   void show();
   void hide();
 
-  void showPanelRegistry(bool show = true);
-  void showFrameStats(bool show = true);
-  void showConsole(bool show = true);
+  void showPanelRegistry(bool show = false);
+  void showFrameStats(bool show = false);
+  void showConsole(bool show = false);
 
  private:
   PanelRegistry& registry;

engine/src/entity.cpp

@@ -0,0 +1,7 @@
+#include "entity.hpp"
+
+namespace sophia {
+
+Entity::Entity(entt::entity handle, Scene* scene) : handle(handle), scene(scene) {}
+
+} // namespace sophia

engine/src/entity.hpp

@@ -0,0 +1,66 @@
+#pragma once
+
+#include <sophia/scene.hpp>
+#include <entt/entt.hpp>
+#include <sophia/util/assert.hpp>
+#include <sophia/types.hpp>
+
+namespace sophia {
+
+class Entity {
+public:
+  Entity(const Entity&) = default;
+  Entity& operator=(const Entity&) = default;
+
+  Entity() = default;
+	Entity(entt::entity handle, Scene* scene);
+
+  template<typename T, typename... Args>
+  T& addComponent(Args&&... args) {
+    SOPHIA_ASSERT(!hasComponent<T>(), "Entity already has component!");
+    T& component = scene->registry.emplace<T>(handle, std::forward<Args>(args)...);
+    // scene->OnComponentAdded<T>(*this, component);
+    return component;
+  }
+
+  template<typename T>
+  T& getComponent()
+  {
+    SOPHIA_ASSERT(hasComponent<T>(), "Entity does not have component!");
+    return scene->registry.get<T>(handle);
+  }
+
+  template<typename T>
+  bool hasComponent()
+  {
+    return scene->registry.all_of<T>(handle);
+  }
+
+  template<typename T>
+  void removeComponent()
+  {
+    SOPHIA_ASSERT(hasComponent<T>(), "Entity does not have component!");
+    scene->registry.remove<T>(handle);
+  }
+
+  operator bool() const { return handle != entt::null; }
+  operator entt::entity() const { return handle; }
+  operator u32() const { return (u32)handle; }
+
+  // UUID GetUUID() { return GetComponent<IDComponent>().ID; }
+  // const std::string& GetName() { return GetComponent<TagComponent>().Tag; }
+
+  bool operator==(const Entity& other) const {
+    return handle == other.handle && scene == other.scene;
+  }
+
+  bool operator!=(const Entity& other) const {
+    return !(*this == other);
+  }
+
+private:
+  entt::entity handle { entt::null};
+  Scene* scene = nullptr;
+};
+
+} // namespace sophia

engine/src/rendering/scene_renderer.cpp

@@ -1,12 +1,61 @@
 #include "rendering/scene_renderer.hpp"
 
+#include <sophia/util/assert.hpp>
+#include <sophia/components.hpp>
+
 namespace sophia {
 
+namespace {
+  struct PushConstantData {
+    glm::mat4 transform{1.f};
+    glm::vec4 color{1.f};
+  };
+}
+
 SceneRenderer::SceneRenderer(ResourceRegistry& resources)
     : resources{resources} {}
 
 SceneRenderer::~SceneRenderer() {}
 
-void SceneRenderer::render(const Scene& scene, RenderTargetHandle target) {}
+void SceneRenderer::render(const Scene& scene, Entity camera, RenderTargetHandle target) {
+    SOPHIA_ASSERT(camera.hasComponent<CameraComponent>(), "camera does not have camera component!");
+
+    auto& R = scene.registry;
+
+    // Get all mesh
+    // For each mesh, get all entities(ES) that have a transform and that mesh
+        // For e in ES: add e's transform component to a list
+
+    // We now have
+    /*
+    M = mesh
+    T = transform
+
+    Work Batch
+    |- M0
+    |  |- T0
+    |  \- T2
+    |
+    |- M1
+    |  |- T1
+    |  \- T5
+    |
+    \- M2
+       |- T3
+       \- T4
+
+    */
+
+    /*
+    for batch in Work Batch:
+        batch.mesh.bind()
+
+        for transform in batch.transforms:
+            commandBuffer.pushConstants(transform)
+            batch.mesh.draw(commandBuffer)
+
+    NOTE: Use instanced rendering?
+    */
+}
 
 }  // namespace sophia

engine/src/rendering/scene_renderer.hpp

@@ -3,10 +3,14 @@
 #include <sophia/handles.hpp>
 #include <sophia/scene.hpp>
 
+#include "entity.hpp"
 #include "resources/resource_registry.hpp"
 
 namespace sophia {
 
+  /**
+   * !TEMP to be decoupled once scene batching and rendering impl
+   */
 class SceneRenderer {
  public:
   SceneRenderer(const SceneRenderer&) = delete;
@@ -15,8 +19,7 @@ class SceneRenderer {
   SceneRenderer(ResourceRegistry& resources);
   ~SceneRenderer();
 
-  // add camera as a arg (entity)
-  void render(const Scene& scene, RenderTargetHandle target);
+  void render(const Scene& scene, Entity camera, RenderTargetHandle target);
 
  private:
   ResourceRegistry& resources;

engine/src/ui/debug_ui.cpp

@@ -12,6 +12,7 @@ DebugUI::DebugUI(PanelRegistry& registry, ConsoleCommandRegistry& commands)
   this->panelRegistryHandle = registry.emplace<PanelRegistryPanel>(registry);
   this->frameStatsHandle = registry.emplace<FrameStatsPanel>();
   this->consoleHandle = registry.emplace<ConsolePanel>(commands);
+  hide();
   // #endif  // !NDEBUG
 }