docs: 完成测试文档和功能文档

- Task 11: 创建测试场景和验证
  - 创建 docs/tests/hammer-deformation-test-results.md
  - 包含4个测试用例模板
  - 包含性能数据表格和调试工具检查清单

- Task 13: 文档更新
  - 更新 CLAUDE.md 添加阶段1核心系统说明
  - 创建 docs/features/hammer-deformation-system.md
  - 更新架构概览、数据流、关键类关系

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

CLAUDE.md

@@ -39,13 +39,17 @@ Unreal Engine uses the Automation System:
 
 ## Architecture Overview
 
-### Core Systems
+### Core Systems (阶段1更新后)
 
-**1. Dynamic Mesh Deformation System**
-- `ADynamicIronBlock` (Source/BladeSmith/DynamicIronBlock.h/cpp) - Main iron block actor that handles all deformation
-- Uses UE5's GeometryScripting API for runtime mesh manipulation
-- Implements plastic deformation with volume-preserving bulge effects
-- BVH acceleration structure for efficient collision detection
+**1. Dynamic Mesh Deformation System (增强)**
+- `ADynamicIronBlock` (Source/BladeSmith/DynamicIronBlock.h/cpp) - 支持各向异性材料流动
+- 顶点属性层: 初始位置、累积应变、硬度系数、打磨度
+- 边缘检测与约束: 保持刀刃平整锐利
+- 表面磨损可视化: 基于打磨度的颜色混合
+- 各向异性材料流动（AnisotropyRatio控制方向性）
+- 锤击时自动更新打磨度（表面从生锈到光亮）
+- Laplacian平滑维护网格质量
+- 自适应优化策略
 
 **2. Voxel-Based Temperature System**
 - 3D temperature voxel grid (`FTemperatureVoxel`) stores temperature and plasticity coefficients
@@ -76,20 +80,36 @@ ABladeSmithCharacter (Player)
         └── OnHammerImpact()
               └── ADynamicIronBlock (Iron Workpiece)
                     ├── Temperature Voxel Grid (CPU/GPU)
+                    ├── Vertex Attribute Arrays (CPU)
+                    │   ├── InitialPositionsArray
+                    │   ├── AccumulatedStrainArray
+                    │   ├── HardnessCoefficientArray
+                    │   └── PolishAmountArray
                     ├── Dynamic Mesh (GeometryScripting)
+                    │   ├── Anisotropic Flow Direction
+                    │   ├── Edge Constraint
+                    │   └── Laplacian Smoothing
                     └── MiceShaders Compute Shaders
 ```
 
-### Data Flow: Hammer Impact to Deformation
+### Data Flow: Hammer Impact to Deformation (阶段1更新)
 
 1. Player swings hammer (`UBladeSmithWeaponComponent::SwingHammer()`)
 2. Ray-cast detects hit on `ADynamicIronBlock`
 3. `OnHammerImpact()` receives: location, normal, radius, depth, force
-4. Sample plasticity coefficient from temperature voxels at hit location
-5. Apply plastic deformation to mesh vertices via `EditMesh()` lambda
-6. Volume-preserving bulge effect applied around impact zone
-7. Update vertex colors to visualize temperature
-8. GPU compute shader updates temperature distribution
+4. **计算材料流动方向** (各向异性)
+   - `FindNearestFreeEdgeDirection()` - 查找最近边缘
+   - `CalculatePrimaryFlowDirection()` - 计算主流动方向
+   - `CalculateSecondaryFlowDirection()` - 计算次流动方向
+5. Sample plasticity coefficient from temperature voxels at hit location
+6. Apply plastic deformation to mesh vertices via `EditMesh()` lambda
+   - **各向异性距离计算** - 材料沿主方向更容易流动
+   - **更新顶点属性** - 累积应变、打磨度
+7. **边缘约束** (如果启用) - `ApplyEdgeLinearConstraint()`
+8. **Laplacian平滑** - `ApplyLaplacianSmoothing()` (自适应)
+9. Recompute mesh normals
+10. Update vertex colors (温度 × 打磨度)
+11. GPU compute shader updates temperature distribution (如启用)
 
 ## Module Dependencies