atdunbg
b25fa29fe5
透明来源：glTF alphaMode=BLEND（解析期读取，OBJ/FBX 恒不透明—— 资产格式定义写死）；MASK 后续演进。Material 加透明语义（入缓存键）， 程序化测试资产 CreateTransparentPlane（RGBA 纯色纹理）。 SceneRenderer：透明材质实例收集进独立 scratch（仅主视图，不投 阴影——alpha 阴影后续演进），batch 按平均距离降序排序（远→近， batchMats 同步重排），SSBO 扁平化顺序 = 排序后顺序。 ForwardPass 两段绘制：不透明（无混合 + 深度写）→ 透明（Shader Object 动态状态切 SRC_ALPHA/ONE_MINUS_SRC_ALPHA 线性 over + 深度 只测不写）；velocity 附件透明段直写（透明表面 velocity 即自身运动）。 frag alpha = albedo 贴图 a 直通，预乘在 tonemap 段（hard constraint 不变）。已知边界：TAA alpha 时域混合（透明边缘几帧渐显）；同 batch 多实例不做实例级排序。
542 lines
21 KiB
C++
542 lines
21 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/Core/AsyncTask.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 <Engine/Renderer/Renderer.h>
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#include <Engine/Renderer/IblGenerator.h>
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#include <imgui.h>
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#include <glm/glm.hpp>
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#include <glm/gtc/matrix_transform.hpp>
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#include <glm/gtc/type_ptr.hpp>
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#include <GLFW/glfw3.h>
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#include <atomic>
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#include <thread>
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using namespace Engine;
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using namespace Engine::ECS;
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namespace
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{
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// 可切换环境（IBL 动态切换演示）：路径 → AssetManager 缓存去重，
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// 重复选择同一环境零成本；首选路径触发一次 compute 预积分
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constexpr const char* kEnvPaths[] = {
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"assets/textures/venice_dawn_1_4k.hdr",
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"assets/textures/rooitou_park_4k.hdr",
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"assets/textures/pink_sunrise_4k.hdr",
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"assets/textures/birchwood_4k.hdr",
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};
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constexpr const char* kEnvNames[] = {
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"Venice Dawn", "Rooitou Park", "Pink Sunrise", "Birchwood",
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};
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constexpr int kEnvCount = 4;
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constexpr int kDefaultEnv = 0;
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constexpr const char* kTemplePath = "assets/models/SunTemple/SunTemple.fbx";
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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", 800, 600)
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{
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}
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~SandboxApp() override
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{
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// worker 只做 CPU 解码（不碰 Vulkan），在任何 GPU 资源
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// 析构之前 join 即安全；派生析构先于基类成员析构执行
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if (m_EnvWorker.joinable()) {
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m_EnvWorker.join();
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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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// ImGui 叠加层（框架只做管线桥接，UI 内容全部在这里定义）
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EnableImGui();
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// 默认环境（IBL 四件套）：经资产层加载（compute 预积分，毫秒级），
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// 其余环境在 ImGui 里按需 lazy 加载后切换
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const auto env = GetAssets().LoadEnvironment(
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kEnvPaths[kDefaultEnv]);
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if (env.Valid()) {
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GetRenderer().SetEnvironment(GetAssets().GetEnvironment(env));
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}
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// 模型资产（PBR 验证场景：backpack 为旧式贴图资产，
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// 退化为电介质因子路径——albedo+normal，metallic=0/roughness=0.5）
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const auto model = GetAssets().LoadModel("assets/models/backpack/backpack.obj");
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// const auto model = GetAssets().LoadModel("assets/models/pocket_watch_4k.gltf/pocket_watch_4k.gltf");
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// 大模型异步加载：assimp 解析在 worker 线程（SunTemple 约 3s），
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// 完成后 OnUpdate 收割 → GPU 构建 → 建实体（cm 尺度 → 0.001）
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m_TempleTask.Run([] { return Model::ParseFromDisk(kTemplePath); });
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m_TempleScale = 0.001f;
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int countSize = 0;
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for (int i = 0; i < countSize; i ++)
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{
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for (int j = 0; j < countSize; j ++)
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{
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auto m = scene.CreateEntity();
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m.AddComponent<MeshRendererComponent>(MeshRendererComponent{model});
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m.GetComponent<TransformComponent>().SetPosition(glm::vec3{(i - countSize * 0.5) * 2, 0, (j - countSize * 0.5) * 2});
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m_Spinners.push_back(m);
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}
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}
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// 地面：程序化纯色平面（半边长 15，中心 y=-2）
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const auto ground = GetAssets().CreatePlane(15.0f, 140, 140, 145);
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// 透明管线验证：两片叠放的半透明平面（前后各一，看混合与排序）
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const auto glass1 = GetAssets().CreateTransparentPlane(
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2.0f, 80, 180, 255, 110);
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const auto glass2 = GetAssets().CreateTransparentPlane(
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2.0f, 255, 120, 80, 110);
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auto g1 = scene.CreateEntity("GlassNear");
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g1.AddComponent<MeshRendererComponent>(MeshRendererComponent{glass1});
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g1.GetComponent<TransformComponent>()
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.SetPosition(glm::vec3(0.0f, 0.5f, -1.0f));
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auto g2 = scene.CreateEntity("GlassFar");
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g2.AddComponent<MeshRendererComponent>(MeshRendererComponent{glass2});
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g2.GetComponent<TransformComponent>()
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.SetPosition(glm::vec3(0.0f, 1.0f, -3.0f));
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m_Ground = scene.CreateEntity("Ground");
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m_Ground.GetComponent<TransformComponent>()
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.SetPosition(glm::vec3(0.0f, -0.5f, 0.0f)); // dirty → 帧循环统一 Compose
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m_Ground.AddComponent<MeshRendererComponent>(MeshRendererComponent{ground});
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// 相机实体（primary = 当前渲染视角；位姿存实体 Transform）
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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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m_Camera.GetComponent<TransformComponent>()
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.SetPosition(glm::vec3(0.0f, 0.0f, 7.0f));
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// 灯光实体（第一个方向光 = 阴影光源）
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m_KeyLight = scene.CreateEntity("KeyLight");
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m_KeyLight.AddComponent<LightComponent>(
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LightComponent{
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.type = LightComponent::Type::Directional,
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.direction = glm::vec3(-0.5f, -0.6f, -0.35f),
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.color = glm::vec4(1.0f, 0.95f, 0.9f, 5.0f),
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.castShadow = true,
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});
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scene.CreateEntity("FillLight")
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.AddComponent<LightComponent>(
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LightComponent{
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.type = LightComponent::Type::Directional,
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.direction = glm::vec3(0.5f, -0.5f, 0.3f),
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.color = glm::vec4(0.3f, 0.5f, 1.0f, 1.5f)
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});
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// 点光源（位置 = 实体 Transform，出生即有；无阴影，距离衰减）
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auto fire = scene.CreateEntity("FirePitLight");
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fire.GetComponent<TransformComponent>().SetPosition(glm::vec3(2.0f, 1.5f, 1.0f));
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fire.AddComponent<LightComponent>(
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LightComponent{
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.type = LightComponent::Type::Point,
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.color = glm::vec4(1.0f, 0.6f, 0.3f, 1.0f), // 暖橙
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.radius = 8.0f,
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});
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auto cool = scene.CreateEntity("CoolFillLight");
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cool.GetComponent<TransformComponent>().SetPosition(glm::vec3(-2.5f, 2.0f, -2.0f));
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cool.AddComponent<LightComponent>(
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LightComponent{
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.type = LightComponent::Type::Point,
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.color = glm::vec4(0.3f, 0.5f, 1.0f, 1.2f), // 冷蓝
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.radius = 10.0f,
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});
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}
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void OnUpdate(f32 deltaTime) override
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{
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// 异步模型收割：解析完成 → GPU 构建 → 建实体
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if (m_TempleTask.Done()) {
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ParsedModel parsed = m_TempleTask.Take();
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const auto ref = GetAssets().LoadModel(kTemplePath,
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std::move(parsed));
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if (ref.Valid()) {
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auto temple = GetScene().CreateEntity("SunTemple");
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temple.AddComponent<MeshRendererComponent>(
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MeshRendererComponent{ref});
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temple.GetComponent<TransformComponent>()
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.SetScale(glm::vec3{m_TempleScale});
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ENGINE_INFO("[ASYNC] SunTemple ready, entity created");
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}
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}
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// 异步环境加载：每帧收割完成的解码结果
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PollEnvironment();
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// 暂停时冻结动画时钟（帧历史验证：暂停后 Temporal Diff
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// 视图应在 2 帧内整屏变黑；相机移动同样会被 diff 捕捉到）
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if (!m_PauseAnim)
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{
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m_Time += deltaTime;
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}
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// 相机（WASD/Space/Shift 移动；位姿读写实体 Transform）
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m_Camera.GetComponent<CameraComponent>()
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.camera.Update(GetWindow(),
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m_Camera.GetComponent<TransformComponent>(),
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deltaTime);
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// 旋转动画：编辑 Transform 分量后 Compose 重算 world
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for (size_t i = 0; i < m_Spinners.size(); ++i)
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{
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auto& t = m_Spinners[i].GetComponent<TransformComponent>();
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t.SetRotation(glm::vec3(0.0f, m_Time * 60.0f + static_cast<f32>(i) * 40.0f, 0.0f));
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}
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}
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// ---- 事件 ----
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// ---- 异步环境加载（decode 后台线程 / GPU 生成主线程）----
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// decode 占切换耗时大头（4k ≈ 130ms）；worker 只产出纯 CPU
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// 像素数据，Vulkan 生成回主线程（设备非线程安全）。
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// 同一时刻最多一个 in-flight，忙碌期的新请求记为 pending 接力。
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void RequestEnvironment(int idx)
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{
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if (m_EnvLoadBusy)
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{
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m_EnvPending = idx;
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return;
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}
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StartEnvDecode(idx);
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}
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void StartEnvDecode(int idx)
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{
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m_EnvLoadBusy = true;
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m_EnvLoadDone.store(false);
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m_EnvLoadingPath = kEnvPaths[idx];
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m_EnvWorker = std::thread([this, idx]() {
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m_EnvDecoded = IblGenerator::DecodeHdr(kEnvPaths[idx]);
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m_EnvLoadDone.store(true); // release：解码结果对主线程可见
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});
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}
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void PollEnvironment()
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{
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if (!m_EnvLoadBusy || !m_EnvLoadDone.load())
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{
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return;
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}
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m_EnvWorker.join(); // join = 同步点，解码结果此后归主线程
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m_EnvLoadBusy = false;
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if (m_EnvDecoded.Valid())
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{
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const auto ref = GetAssets().LoadEnvironment(
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m_EnvLoadingPath, std::move(m_EnvDecoded));
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if (ref.Valid())
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{
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GetRenderer().SetEnvironment(GetAssets().GetEnvironment(ref));
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}
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}
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m_EnvDecoded = {};
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// 忙碌期间的最新请求接力（rapid switch 只保留最终意图）
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if (m_EnvPending >= 0)
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{
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const int next = m_EnvPending;
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m_EnvPending = -1;
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StartEnvDecode(next);
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}
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}
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// ---- 叠加层 UI（唯一允许出现 ImGui 控件的地方）----
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void OnRenderOverlay() override
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{
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ImGui::Begin("Scene Debug");
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auto& renderer = GetRenderer();
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// ---- Scene：场景内容（灯/动画） ----
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if (ImGui::CollapsingHeader("Scene", ImGuiTreeNodeFlags_DefaultOpen))
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{
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// 阴影光源（无开关，控件平铺聚拢）
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if (auto* light = m_KeyLight.TryGetComponent<LightComponent>())
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{
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ImGui::Text("Key Light (shadow caster)");
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ImGui::SliderFloat3("direction",
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&light->direction.x, -1.0f, 1.0f);
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ImGui::SliderFloat("intensity", &light->color.a, 0.0f, 20.0f);
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if (ImGui::Button("reset"))
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{
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light->direction = glm::vec3(-0.5f, -0.6f, -0.35f);
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light->color.a = 2.0f;
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}
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}
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ImGui::Checkbox("Pause Animation", &m_PauseAnim);
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}
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// ---- Rendering：渲染管线参数与开关 ----
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if (ImGui::CollapsingHeader("Rendering", ImGuiTreeNodeFlags_DefaultOpen))
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{
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// Tonemap（无开关，平铺）
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f32 exposure = renderer.GetExposure();
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if (ImGui::SliderFloat("exposure", &exposure, 0.1f, 4.0f))
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{
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renderer.SetExposure(exposure);
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}
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bool aces = renderer.GetUseACES();
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if (ImGui::Checkbox("ACES", &aces))
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{
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renderer.SetUseACES(aces);
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}
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// Bloom：开关即显隐——勾上才显示参数
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bool bloom = renderer.GetBloomEnabled();
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if (ImGui::Checkbox("Bloom", &bloom))
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{
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renderer.SetBloomEnabled(bloom);
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}
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if (bloom)
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{
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f32 threshold = renderer.GetBloomThreshold();
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if (ImGui::SliderFloat("threshold", &threshold, 0.0f, 2.0f))
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{
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renderer.SetBloomThreshold(threshold);
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}
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f32 strength = renderer.GetBloomStrength();
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if (ImGui::SliderFloat("strength", &strength, 0.0f, 2.0f))
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{
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renderer.SetBloomStrength(strength);
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}
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}
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// 无参数的纯开关：横排平铺
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bool shadows = renderer.GetShadowsEnabled();
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if (ImGui::Checkbox("Shadows", &shadows))
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{
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renderer.SetShadowsEnabled(shadows);
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}
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ImGui::SameLine();
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bool taa = renderer.GetTAAEnabled();
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if (ImGui::Checkbox("TAA", &taa))
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{
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renderer.SetTAAEnabled(taa);
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}
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ImGui::SameLine();
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bool lod = renderer.GetLodEnabled();
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if (ImGui::Checkbox("LOD", &lod))
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{
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renderer.SetLodEnabled(lod); // 关 = 恒绘原网格
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}
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}
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// ---- Environment：IBL 环境 + 调试视图（决定"看什么"） ----
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if (ImGui::CollapsingHeader("Environment", ImGuiTreeNodeFlags_DefaultOpen))
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{
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// 动态环境切换（Assets 层加载 → Renderer 换绑；缓存去重）
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ImGui::Text("Environment (IBL)");
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bool& DrawSkybox = GetScene().GetSettings().DrawSkybox;
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ImGui::Checkbox("DrawSkybox", &DrawSkybox);
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if (DrawSkybox)
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{
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int envIdx = m_EnvIndex;
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if (ImGui::Combo("env", &envIdx, kEnvNames, kEnvCount))
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{
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// 异步：解码后台线程，完成后 OnUpdate 里换绑
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m_EnvIndex = envIdx;
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RequestEnvironment(envIdx);
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}
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ImGui::Text(m_EnvLoadBusy ? "(decoding...)" :
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"(switch = compute pre-integrate, ms-level)");
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// 调试视图：单看某个 pass 的中间输出（类 UE pass debug）
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const auto& viewNames = renderer.GetDebugViewNames();
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int view = renderer.GetDebugView();
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if (ImGui::Combo("Debug View", &view, viewNames.data(),
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static_cast<int>(viewNames.size())))
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{
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renderer.SetDebugView(view);
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}
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}else
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{
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ImGui::ColorEdit4("ClearColor", glm::value_ptr(GetScene().GetSettings().ClearColor));
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}
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}
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// ---- GPU Timings：只读遥测（默认折叠，不占面板高度） ----
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if (ImGui::CollapsingHeader("GPU Timings"))
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{
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// Pass 级 GPU 耗时（RG timestamp）
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ImGui::Text("instances: %u main / %u shadow",
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renderer.GetMainInstanceCount(),
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renderer.GetShadowInstanceCount());
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if (renderer.GetInstancesTruncated()) {
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ImGui::TextColored(ImVec4(1.0f, 0.3f, 0.3f, 1.0f),
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"TRUNCATED: instance buffer full!");
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}
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const auto& names = renderer.GetPassNames();
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const auto& times = renderer.GetPassGpuMs();
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for (size_t i = 0; i < names.size() && i < times.size(); ++i)
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{
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ImGui::Text(" %-12s %.3f ms", names[i].c_str(), times[i]);
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}
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}
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// ---- Frame：帧率控制与显示 ----
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if (ImGui::CollapsingHeader("Frame", ImGuiTreeNodeFlags_DefaultOpen))
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{
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auto& app = *this;
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bool vsync = app.GetVSync();
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if (ImGui::Checkbox("VSync", &vsync))
|
||
{
|
||
app.SetVSync(vsync);
|
||
if (!vsync)
|
||
{
|
||
const f32 target = app.GetTargetFps();
|
||
app.SetTargetFps(target);
|
||
}
|
||
}
|
||
if (!vsync)
|
||
{
|
||
f32 target = app.GetTargetFps();
|
||
if (ImGui::SliderFloat("target fps", &target, 24.0f, 360.0f, "%.0f"))
|
||
{
|
||
app.SetTargetFps(target);
|
||
}
|
||
}
|
||
ImGui::Text("fps: %.1f frame: %llu",
|
||
1.0f / GetDeltaTime(),
|
||
static_cast<unsigned long long>(GetFrameCount()));
|
||
}
|
||
|
||
ImGui::End();
|
||
|
||
|
||
// 自定义重载事件： 重载关闭事件模态框
|
||
{
|
||
if (m_ShowQuitConfirm)
|
||
{
|
||
ImGui::OpenPopup("Should quit?");
|
||
m_ShowQuitConfirm = false;
|
||
}
|
||
|
||
ImGui::SetNextWindowPos(
|
||
ImGui::GetMainViewport()->GetCenter(),
|
||
ImGuiCond_Appearing, ImVec2(0.5f, 0.5f));
|
||
|
||
if (ImGui::BeginPopupModal("Should quit?", nullptr,
|
||
ImGuiWindowFlags_AlwaysAutoResize))
|
||
{
|
||
ImGui::TextUnformatted("Quit the application?");
|
||
ImGui::Separator();
|
||
if (ImGui::Button("Yes", ImVec2(120, 0)))
|
||
{
|
||
m_QuitConfirmed = true;
|
||
ImGui::CloseCurrentPopup();
|
||
}
|
||
ImGui::SameLine();
|
||
if (ImGui::Button("No", ImVec2(120, 0)))
|
||
{
|
||
ImGui::CloseCurrentPopup();
|
||
}
|
||
ImGui::EndPopup();
|
||
}
|
||
|
||
if (m_QuitConfirmed)
|
||
{
|
||
m_QuitConfirmed = false;
|
||
Close();
|
||
}
|
||
}
|
||
}
|
||
|
||
void OnWindowClose(const Event& event) override
|
||
{
|
||
SetImGuiEnabled(true);
|
||
m_ShowQuitConfirm = true;
|
||
}
|
||
|
||
void OnKeyPress(const Event& event) override
|
||
{
|
||
if (event.key == GLFW_KEY_GRAVE_ACCENT)
|
||
{
|
||
SetImGuiEnabled(!GetImGuiEnabled());
|
||
}
|
||
if (event.key == GLFW_KEY_F1)
|
||
{
|
||
STATS.PrintComparison();
|
||
}
|
||
}
|
||
|
||
|
||
void OnWindowResize(const Event& event) override
|
||
{
|
||
ENGINE_INFO("App: window resized to {}x{}", event.width, event.height);
|
||
}
|
||
|
||
private:
|
||
bool m_ShowQuitConfirm = false;
|
||
bool m_QuitConfirmed = false;
|
||
EntityHandle m_Camera{}; // Scene::CreateEntity 之前为空
|
||
EntityHandle m_Ground{};
|
||
EntityHandle m_KeyLight{};
|
||
std::vector<EntityHandle> m_Spinners;
|
||
f32 m_Time = 0.0f;
|
||
bool m_PauseAnim = true; // 冻结动画时钟（帧历史 diff 验证用）
|
||
int m_EnvIndex = kDefaultEnv;
|
||
|
||
// ---- 异步环境加载状态（单 in-flight + pending 接力）----
|
||
std::thread m_EnvWorker;
|
||
std::string m_EnvLoadingPath;
|
||
DecodedEquirect m_EnvDecoded; // worker 写 → join 后主线程读
|
||
std::atomic<bool> m_EnvLoadDone{false};
|
||
bool m_EnvLoadBusy = false;
|
||
int m_EnvPending = -1;
|
||
|
||
// ---- 异步模型加载（SunTemple）----
|
||
AsyncTask<ParsedModel> m_TempleTask;
|
||
f32 m_TempleScale = 1.0f; // cm 尺度资产 → 米（解析后应用）
|
||
};
|
||
}
|
||
|
||
int main()
|
||
{
|
||
SandboxApp app;
|
||
|
||
try
|
||
{
|
||
app.Run();
|
||
}
|
||
catch (const std::exception& e)
|
||
{
|
||
ENGINE_FATAL("Exception: {}", e.what());
|
||
return -1;
|
||
}
|
||
|
||
return 0;
|
||
}
|