atdunbg
fa9082706b
- Frustum（Gribb-Hartmann）：从 view-proj 行组合提取 6 平面， 包围球相交测试；按 Vulkan [0,1] 深度约定取 near=row2 - Mesh 构造时缓存局部空间包围球（顶点包围盒 → 中心+半径） - 实例收集重写：单趟遍历，每个 (实体, mesh 部件) 对相机视锥与 光源视锥分别做剔除——相机外实体仍可投影子进视野，Shadow 必须用 光源视锥独立剔除，不能用相机结果 - 实例矩阵数组 = [主视图段 | 阴影视图段]，batch.first 全局下标； 两视图共享同一份 ObjectBuffer SSBO - 聚合改哈希（unordered_map），单趟填充替代原两趟遍历 - 面板显示 instances main/shadow 计数（剔除效果实时可见） 实测：1 背包 80 main / 80 shadow（修复前 shadow=21——near 平面 按 [-1,1] 矩阵误用 [0,1] 公式，光锥近半段被误剔）
300 lines
8.8 KiB
C++
300 lines
8.8 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 <Engine/Renderer/Renderer.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 <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", 800, 600)
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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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// 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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// 地面：程序化纯色平面（半边长 15，中心 y=-2）
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auto ground = GetAssets().CreatePlane(15.0f, 140, 140, 145);
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m_Ground = scene.CreateEntity("Ground");
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m_Ground.AddComponent<TransformComponent>()
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.SetPosition(glm::vec3(0.0f, -4.5f, 0.0f))
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.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）
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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（悬浮在地面上方）
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auto size = 1;
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for (int i = 0; i < size; ++i)
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{
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for (int j = 0; j < size; j++)
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{
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auto e = scene.CreateEntity("Backpack" + std::to_string(i));
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e.AddComponent<TransformComponent>()
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.SetPosition(glm::vec3((i - size * 0.5) * 1.5f, 0.0f, (j - size * 0.5) * 1.5f))
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.SetScale(glm::vec3(0.5f))
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.Compose();
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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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}
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// 灯光实体（第一个灯 = 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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glm::vec3(-0.5f, -0.6f, -0.35f),
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glm::vec4(1.0f, 0.95f, 0.9f, 1.0f)
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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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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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}
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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：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.rotation.y = m_Time * 60.0f + static_cast<f32>(i) * 40.0f;
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t.scale = glm::vec3(0.5f);
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t.Compose();
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}
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}
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// ---- 事件 ----
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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::ShowDemoWindow();
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ImGui::Begin("Scene Debug");
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// 阴影光源方向：拖动滑条实时看影子变化
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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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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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}
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}
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// Tonemap + Bloom 参数（HDR 后处理输出端）
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auto& renderer = GetRenderer();
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ImGui::Separator();
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ImGui::Text("Tonemap");
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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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ImGui::Text("Bloom");
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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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// Pass 级 GPU 耗时（RG timestamp）
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ImGui::Separator();
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ImGui::Text("GPU Timings");
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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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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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// 帧率控制
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auto& app = *this;
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ImGui::Separator();
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ImGui::Text("Frame");
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bool vsync = app.GetVSync();
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if (ImGui::Checkbox("VSync", &vsync))
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{
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app.SetVSync(vsync);
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if (!vsync)
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{
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const f32 target = app.GetTargetFps();
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app.SetTargetFps(target);
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}
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}
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if (!vsync)
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{
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f32 target = app.GetTargetFps();
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if (ImGui::SliderFloat("target fps", &target, 24.0f, 360.0f, "%.0f"))
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{
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app.SetTargetFps(target);
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}
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}
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ImGui::Separator();
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ImGui::Text("fps: %.1f frame: %llu",
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1.0f / GetDeltaTime(),
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static_cast<unsigned long long>(GetFrameCount()));
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ImGui::End();
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// 自定义重载事件： 重载关闭事件模态框
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{
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if (m_ShowQuitConfirm)
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{
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ImGui::OpenPopup("Should quit?");
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m_ShowQuitConfirm = false;
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}
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ImGui::SetNextWindowPos(
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ImGui::GetMainViewport()->GetCenter(),
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ImGuiCond_Appearing, ImVec2(0.5f, 0.5f));
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if (ImGui::BeginPopupModal("Should quit?", nullptr,
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ImGuiWindowFlags_AlwaysAutoResize))
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{
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ImGui::TextUnformatted("Quit the application?");
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ImGui::Separator();
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if (ImGui::Button("Yes", ImVec2(120, 0)))
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{
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m_QuitConfirmed = true;
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ImGui::CloseCurrentPopup();
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}
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ImGui::SameLine();
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if (ImGui::Button("No", ImVec2(120, 0)))
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{
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ImGui::CloseCurrentPopup();
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}
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ImGui::EndPopup();
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}
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if (m_QuitConfirmed)
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{
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m_QuitConfirmed = false;
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Close();
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}
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}
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}
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void OnWindowClose(const Event& event) override
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{
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m_ShowQuitConfirm = true;
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}
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void OnKeyPress(const Event& event) override
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{
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if (event.key == GLFW_KEY_GRAVE_ACCENT)
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{
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SetImGuiEnabled(!GetImGuiEnabled());
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}
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if (event.key == GLFW_KEY_F1)
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{
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STATS.PrintComparison();
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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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bool m_ShowQuitConfirm = false;
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bool m_QuitConfirmed = false;
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EntityHandle m_Camera{}; // Scene::CreateEntity 之前为空
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EntityHandle m_Ground{};
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EntityHandle m_KeyLight{};
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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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{
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app.Run();
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}
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catch (const std::exception& e)
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{
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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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