设计架构，隔离图纸生成逻辑

Cad/Drawers/BlockRawFreeForgeRoundHeadGenerator.cs

@@ -0,0 +1,11 @@
+using CadParamPluging.Common;
+
+namespace CadParamPluging.Cad
+{
+    public sealed class BlockRawFreeForgeRoundHeadGenerator : TemplateDrawingGeneratorBase
+    {
+        public static readonly string Key = TemplateKeyBuilder.Build("毛料态", "自由锻", "方体", "有圆头");
+
+        public override string TemplateKey => Key;
+    }
+}

Cad/Drawers/ITemplateDrawingGenerator.cs

@@ -0,0 +1,15 @@
+using Autodesk.AutoCAD.Geometry;
+using CadParamPluging.Common;
+using CadParamPluging.Domain.Models;
+
+namespace CadParamPluging.Cad
+{
+    public interface ITemplateDrawingGenerator
+    {
+        string TemplateKey { get; }
+
+        FeatureDrivenDrawer.ExpectedDrawingSize CalculateExpectedSize(ParamBag bag, TemplateParams templateParams);
+
+        void Draw(CadContext ctx, ParamBag bag, TemplateParams templateParams, Point3d center, double scaleFactor);
+    }
+}

Cad/Drawers/RingMachinedRollingGenerator.cs

@@ -0,0 +1,11 @@
+using CadParamPluging.Common;
+
+namespace CadParamPluging.Cad
+{
+    public sealed class RingMachinedRollingGenerator : TemplateDrawingGeneratorBase
+    {
+        public static readonly string Key = TemplateKeyBuilder.Build("车加工", "轧制", "环形", "无");
+
+        public override string TemplateKey => Key;
+    }
+}

Cad/Drawers/RingRawRollingGenerator.cs

@@ -0,0 +1,11 @@
+using CadParamPluging.Common;
+
+namespace CadParamPluging.Cad
+{
+    public sealed class RingRawRollingGenerator : TemplateDrawingGeneratorBase
+    {
+        public static readonly string Key = TemplateKeyBuilder.Build("毛料态", "轧制", "环形", "无");
+
+        public override string TemplateKey => Key;
+    }
+}

Cad/Drawers/TemplateDrawingGeneratorBase.cs

@@ -0,0 +1,40 @@
+using System;
+using Autodesk.AutoCAD.Geometry;
+using CadParamPluging.Common;
+using CadParamPluging.Domain.Models;
+
+namespace CadParamPluging.Cad
+{
+    public abstract class TemplateDrawingGeneratorBase : ITemplateDrawingGenerator
+    {
+        public abstract string TemplateKey { get; }
+
+        public virtual FeatureDrivenDrawer.ExpectedDrawingSize CalculateExpectedSize(ParamBag bag, TemplateParams templateParams)
+        {
+            return FeatureDrivenDrawer.CalculateExpectedSize(bag, templateParams?.SheetSize);
+        }
+
+        public virtual void Draw(CadContext ctx, ParamBag bag, TemplateParams templateParams, Point3d center, double scaleFactor)
+        {
+            if (ctx == null)
+            {
+                throw new ArgumentNullException(nameof(ctx));
+            }
+
+            if (templateParams == null)
+            {
+                throw new ArgumentNullException(nameof(templateParams));
+            }
+
+            HalfSectionDrawer.Draw(
+                ctx,
+                bag,
+                templateParams.ProjectType,
+                templateParams.SheetSize,
+                templateParams.Scale,
+                templateParams.DrawingType,
+                center,
+                scaleFactor);
+        }
+    }
+}

Cad/Drawers/TemplateDrawingRegistry.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+
+namespace CadParamPluging.Cad
+{
+    public static class TemplateDrawingRegistry
+    {
+        private static readonly Dictionary<string, ITemplateDrawingGenerator> Generators =
+            new Dictionary<string, ITemplateDrawingGenerator>(StringComparer.OrdinalIgnoreCase);
+
+        static TemplateDrawingRegistry()
+        {
+            Register(new RingMachinedRollingGenerator());
+            Register(new RingRawRollingGenerator());
+            Register(new BlockRawFreeForgeRoundHeadGenerator());
+        }
+
+        public static bool TryResolve(string templateKey, out ITemplateDrawingGenerator generator)
+        {
+            generator = null;
+            if (string.IsNullOrWhiteSpace(templateKey))
+            {
+                return false;
+            }
+
+            return Generators.TryGetValue(templateKey, out generator);
+        }
+
+        private static void Register(ITemplateDrawingGenerator generator)
+        {
+            if (generator == null || string.IsNullOrWhiteSpace(generator.TemplateKey))
+            {
+                return;
+            }
+
+            Generators[generator.TemplateKey] = generator;
+        }
+    }
+}

CadParamPluging.csproj

@@ -81,6 +81,12 @@
     <Compile Include="Cad\DictionaryHelper.cs" />
     <Compile Include="Cad\FeatureDrivenDrawer.cs" />
     <Compile Include="Cad\HalfSectionDrawer.cs" />
+    <Compile Include="Cad\Drawers\ITemplateDrawingGenerator.cs" />
+    <Compile Include="Cad\Drawers\TemplateDrawingGeneratorBase.cs" />
+    <Compile Include="Cad\Drawers\RingMachinedRollingGenerator.cs" />
+    <Compile Include="Cad\Drawers\RingRawRollingGenerator.cs" />
+    <Compile Include="Cad\Drawers\BlockRawFreeForgeRoundHeadGenerator.cs" />
+    <Compile Include="Cad\Drawers\TemplateDrawingRegistry.cs" />
     <Compile Include="Cad\TemplateAnnotationOptionsExtractor.cs" />
     <Compile Include="Cad\TemplateLayoutAnnotationExtractor.cs" />
     <Compile Include="Cad\TemplateModelSheetExtractor.cs" />

Readme.md

@@ -547,6 +547,64 @@ public partial class ParamDrawingPanel : UserControl
 }
 ```
 
+### 4.5 新模板出图逻辑隔离（新增模板开发流程）
+
+为保证每个模板的**生成图纸逻辑隔离**，出图逻辑按模板拆分为独立生成器：
+
+**核心机制**
+
+- 每个模板由 `TemplateKey` 唯一标识（由 `TemplateKeyBuilder.Build(ProjectType, DrawingType, SheetSize, Scale)` 生成）。
+- 出图时根据 `TemplateKey` 从 `TemplateDrawingRegistry` 解析到对应生成器；
+- 公共流程（清理模板、附注/表格替换、标题栏更新、参数保存）仍在 `ParamDrawingPanel` 中执行，
+  **只有“图形绘制 + 预期尺寸计算”由各生成器负责**。
+
+**新增模板流程（开发者指引）**
+
+1. **新增生成器类**
+   - 目录：`Cad/Drawers/`
+   - 实现 `ITemplateDrawingGenerator` 或继承 `TemplateDrawingGeneratorBase`。
+   - 指定 `TemplateKey`，与模板参数绑定配置完全一致。
+
+   ```csharp
+   public sealed class NewTemplateGenerator : TemplateDrawingGeneratorBase
+   {
+       public static readonly string Key = TemplateKeyBuilder.Build("交付状态", "工艺方法", "结构特征", "特殊条件");
+       public override string TemplateKey => Key;
+
+       // 如需特殊尺寸预估，重写此方法
+       public override FeatureDrivenDrawer.ExpectedDrawingSize CalculateExpectedSize(ParamBag bag, TemplateParams templateParams)
+       {
+           return base.CalculateExpectedSize(bag, templateParams);
+       }
+
+       // 如需自定义出图逻辑，重写此方法
+       public override void Draw(CadContext ctx, ParamBag bag, TemplateParams templateParams, Point3d center, double scaleFactor)
+       {
+           // 自定义绘图逻辑
+       }
+   }
+   ```
+
+2. **注册生成器**
+   - 在 `TemplateDrawingRegistry` 的静态构造函数中注册：
+
+   ```csharp
+   Register(new NewTemplateGenerator());
+   ```
+
+3. **配置模板参数绑定**
+   - 在 `模板参数绑定` 界面新增模板定义（或在 `TemplateSchemaDefaults` 中加入默认项）。
+   - 确保 `ProjectType / DrawingType / SheetSize / Scale` 与生成器 `TemplateKey` 完全一致。
+
+4. **参数与附注**
+   - 在模板绑定里选择该模板需要的参数；
+   - 配置附注模板文本与占位符绑定（若需要）。
+
+**说明**
+
+- 现有模板生成器示例位于 `Cad/Drawers/`，可直接参考扩展；
+- 若某模板需要完全不同的绘图算法，可在生成器中自行实现，不影响其他模板。
+
 > 具体 UI 控件命名、字段等开发时根据实际参数调整。
 
 ---

UI/ParamDrawingPanel.cs

@@ -231,6 +231,12 @@ namespace CadParamPluging.UI
                     return;
                 }
 
+                if (!TemplateDrawingRegistry.TryResolve(templateKey, out var generator))
+                {
+                    AppendLog($"未找到该模板的图纸生成逻辑（TemplateKey={templateKey}）。请先实现对应模板生成器。");
+                    return;
+                }
+
                 var catalog = ParamCatalogStore.Load();
                 CadParamPluging.Common.ParamBag bag;
                 // 若用户点击了【读取参数】，则将读取到的参数作为本次弹窗的默认值回填
@@ -352,7 +358,7 @@ namespace CadParamPluging.UI
                         }
 
                         // 1. 获取预估图形尺寸 (不含标注的纯几何尺寸 + 预留边距)
-                        var expectedSize = FeatureDrivenDrawer.CalculateExpectedSize(bag, tplParams.SheetSize);
+                        var expectedSize = generator.CalculateExpectedSize(bag, tplParams);
                         
                         // 调试：输出关键参数以排查比例建议错误
                         var debugDelivery = bag.GetString("DeliveryStatus");
@@ -438,16 +444,12 @@ namespace CadParamPluging.UI
                     
                     // 根据模板参数绘制半剖视图，居中放置于原图纸位置
                     // 使用特征驱动模式：根据参数存在性动态绘制对应特征
-                    HalfSectionDrawer.Draw(
+                    generator.Draw(
                         ctx,
                         bag,
-                        tplParams.ProjectType,  // 交付状态
+                        tplParams,
-                        tplParams.SheetSize,    // 结构特征
+                        removeResult.OriginalCenter,
-                        tplParams.Scale,        // 特殊条件（中心冲孔/有圆头等）
+                        scaleFactor);
-                        tplParams.DrawingType,  // 工艺方法（轧制/自由锻）
-                        removeResult.OriginalCenter,  // 原图纸中心点
-                        scaleFactor  // 缩放比例
-                    );
                     
                     // Force Zoom Extents to ensure visibility
                     try { doc.SendStringToExecute("._ZOOM _E ", true, false, false); } catch { }