新增程序化立方体与可碎墙验收：Model::CreateCube 五层链路 + WallFracture 碎片刚体群（命中碎裂/径向飞散/寿命清理）

2026-10-08 22:28:49 +08:00
parent ed7cb417bd
commit d2701a3d9b
9 changed files with 415 additions and 0 deletions
@@ -161,6 +161,89 @@ Scope<Model> Model::CreateTransparentPlane(
                                  true));
 }

+Scope<Model> Model::CreateCube(Device& device, MemoryAllocator& allocator,
+                               DescriptorManager& descriptorManager,
+                               vk::DescriptorSetLayout textureLayout,
+                               f32 halfSize, u8 r, u8 g, u8 b)
+{
+    return Scope<Model>(new Model(device, allocator, descriptorManager,
+                                  textureLayout, CubeTag{},
+                                  halfSize, std::array<u8, 4>{r, g, b, 255}));
+}
+
+// 程序化立方体：6 面 24 顶点（面法线朝外，CCW 从外看），36 索引。
+// 结构镜像平面 ctor：默认纹理 → 纯色 albedo 覆盖 → 单 mesh
+Model::Model(Device& device, MemoryAllocator& allocator,
+             DescriptorManager& descriptorManager,
+             vk::DescriptorSetLayout textureLayout,
+             CubeTag, f32 halfSize, const std::array<u8, 4>& rgba)
+    : m_Device(device)
+    , m_Allocator(allocator)
+    , m_DescriptorManager(descriptorManager)
+    , m_TextureLayout(textureLayout)
+{
+    // 纯色贴图直供 albedo 槽；生命周期挂进纹理缓存（键含 rgba 值，
+    // 同色共享、异色互不冲突）——与平面 ctor 同一套
+    InitDefaultTextures();
+    Scope<Texture> tex = Texture::CreateSolidColor(device, allocator,
+                                                   rgba[0], rgba[1], rgba[2]);
+    Texture* albedoOverride = tex.get();
+    const std::string texKey = "proc-cube:" + std::to_string(rgba[0]) + ',' +
+        std::to_string(rgba[1]) + ',' + std::to_string(rgba[2]) + ',' +
+        std::to_string(rgba[3]);
+    m_TextureCache.emplace(texKey, std::move(tex));
+
+    const f32 h = halfSize;
+    // 逐面 4 顶点（底左/底右/顶右/顶左，从面外看）+ 单位 UV
+    const glm::vec3 P[24] = {
+        // +Z（前）
+        {-h,-h, h}, { h,-h, h}, { h, h, h}, {-h, h, h},
+        // -Z（后）
+        { h,-h,-h}, {-h,-h,-h}, {-h, h,-h}, { h, h,-h},
+        // +Y（上）
+        {-h, h, h}, { h, h, h}, { h, h,-h}, {-h, h,-h},
+        // -Y（下）
+        {-h,-h,-h}, { h,-h,-h}, { h,-h, h}, {-h,-h, h},
+        // +X（右）
+        { h,-h, h}, { h,-h,-h}, { h, h,-h}, { h, h, h},
+        // -X（左）
+        {-h,-h,-h}, {-h,-h, h}, {-h, h, h}, {-h, h,-h},
+    };
+    const glm::vec3 N[6] = {
+        {0, 0, 1}, {0, 0, -1}, {0, 1, 0}, {0, -1, 0}, {1, 0, 0}, {-1, 0, 0},
+    };
+    const glm::vec2 UV[4] = {{0, 0}, {1, 0}, {1, 1}, {0, 1}};
+
+    std::vector<Vertex> vertices;
+    vertices.reserve(24);
+    for (u32 f = 0; f < 6; ++f) {
+        for (u32 i = 0; i < 4; ++i) {
+            vertices.push_back({P[f * 4 + i], N[f], UV[i]});
+        }
+    }
+    std::vector<u32> indices;
+    indices.reserve(36);
+    for (u32 f = 0; f < 6; ++f) {
+        const u32 b = f * 4;
+        const std::vector<u32> quad = {b, b + 1, b + 2, b, b + 2, b + 3};
+        indices.insert(indices.end(), quad.begin(), quad.end());
+    }
+    const std::vector<std::vector<u32>> lodIndices = {indices};
+
+    std::string paths[Material::kSlotCount] = {"", "", "", ""};
+    std::array<Texture*, Material::kSlotCount> overrides{};
+    overrides[Material::Albedo] = albedoOverride;
+    Material* mat = GetOrCreateMaterial(paths, MaterialParams{}, false,
+                                        overrides);
+
+    m_Meshes.push_back(CreateScope<Mesh>(
+        m_Device, m_Allocator, vertices, lodIndices, mat));
+    // 内建材质快照（与 m_Meshes 下标对齐，编辑器材质槽 UI 不越界）
+    m_MeshMaterialInfos.push_back(
+        {"Cube", {}, MaterialParams{}, false});
+    RebuildUnionBounds();
+}
+
 ParsedModel Model::ParseFromDisk(const std::string& path)
 {
    ParsedModel out;