atdunbg
394bfd3d0c
- 新增 EntityHandle：e.AddComponent<T>() / e.GetComponent<T>() / e.Destroy() / e.GetUUID()，转发 entt registry，零存储开销 - Scene::CreateEntity 返回 EntityHandle；Scene 层组件接口保留 （给渲染器/系统批量遍历用） - 语义分层：应用层"实体管组件"（句柄表皮）， 数据层组件存储仍集中在 registry（ECS 性能根基）
136 lines
3.9 KiB
C++
136 lines
3.9 KiB
C++
//
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// Created by atdunbg on 2026/9/20.
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//
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// SandboxApp：第一个基于 Application 框架的程序。
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//
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// main 的全部职责：定义一个 Application 派生类并运行它。
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// 窗口、渲染器、事件泵、帧计时、场景容器全部由框架管理；
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// 这里只写"程序逻辑"：创建实体、逐帧更新组件、事件响应。
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//
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#include <Engine/Core/Application.h>
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#include <Engine/Core/Log.h>
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#include <Engine/Core/Stats.h>
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#include <Engine/ECS/Scene.h>
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#include <Engine/ECS/EntityHandle.h>
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#include <Engine/ECS/Components.h>
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#include <Engine/Assets/AssetManager.h>
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#include <glm/glm.hpp>
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#include <glm/gtc/matrix_transform.hpp>
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#include <GLFW/glfw3.h>
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using namespace Engine;
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using namespace Engine::ECS;
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class SandboxApp final : public Application
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{
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public:
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SandboxApp()
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: Application("HelloVulkan", 1280, 720)
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{
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}
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protected:
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// ---- 生命周期 ----
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void OnInit() override
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{
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Scene& scene = GetScene();
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// 模型资产（AssetManager 负责加载/缓存/生命周期，返回句柄）
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auto backpack = GetAssets().LoadModel("assets/models/backpack/backpack.obj");
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// 相机实体（primary = 当前渲染视角）
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m_Camera = scene.CreateEntity("MainCamera");
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auto& camera = m_Camera.AddComponent<CameraComponent>();
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camera.primary = true;
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camera.camera.SetPosition(glm::vec3(0.0f, 0.0f, 7.0f));
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// 背包实体 × 3
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for (int i = 0; i < 3; ++i) {
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auto e = scene.CreateEntity("Backpack" + std::to_string(i));
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e.AddComponent<TransformComponent>().world = glm::translate(
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glm::mat4(1.0f),
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glm::vec3((i - 1) * 1.5f, 0.0f, 0.0f));
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e.AddComponent<MeshRendererComponent>(MeshRendererComponent{backpack});
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m_Spinners.push_back(e);
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}
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// 灯光实体
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scene.CreateEntity("KeyLight")
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.AddComponent<LightComponent>(
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LightComponent{glm::vec3(-0.5f, -1.0f, -0.3f),
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glm::vec4(1.0f, 0.95f, 0.9f, 1.0f)});
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scene.CreateEntity("FillLight")
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.AddComponent<LightComponent>(
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LightComponent{glm::vec3(0.5f, -0.5f, 0.3f),
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glm::vec4(0.3f, 0.5f, 1.0f, 0.8f)});
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}
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void OnUpdate(f32 deltaTime) override
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{
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m_Time += deltaTime;
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// 相机（WASD/Space/Shift 移动）
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m_Camera.GetComponent<CameraComponent>()
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.camera.Update(GetWindow(), deltaTime);
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// 旋转动画：直接写实体组件
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for (size_t i = 0; i < m_Spinners.size(); ++i) {
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f32 angle = m_Time * glm::radians(60.0f) + static_cast<f32>(i) * 0.7f;
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auto& transform = m_Spinners[i].GetComponent<TransformComponent>();
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glm::mat4 t = glm::translate(
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glm::mat4(1.0f),
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glm::vec3((static_cast<f32>(i) - 1.0f) * 1.5f, 0.0f, 0.0f));
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glm::mat4 r = glm::rotate(glm::mat4(1.0f), angle, glm::vec3(0.0f, 1.0f, 0.0f));
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glm::mat4 s = glm::scale(glm::mat4(1.0f), glm::vec3(0.5f));
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transform.world = t * r * s;
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}
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}
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// ---- 事件 ----
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void OnKeyPress(const Event& event) override
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{
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if (event.key == GLFW_KEY_F1) {
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STATS.PrintComparison();
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}
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if (event.key == GLFW_KEY_ESCAPE) {
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Close();
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}
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}
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void OnWindowResize(const Event& event) override
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{
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ENGINE_INFO("App: window resized to {}x{}", event.width, event.height);
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}
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private:
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EntityHandle m_Camera{}; // Scene::CreateEntity 之前为空
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std::vector<EntityHandle> m_Spinners;
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f32 m_Time = 0.0f;
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};
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int main()
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{
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SandboxApp app;
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try {
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app.Run();
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}
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catch (const std::exception& e) {
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ENGINE_FATAL("Exception: {}", e.what());
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return -1;
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}
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return 0;
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}
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