diff --git a/__test__/FileSystem.test.ts b/__test__/FileSystem.test.ts
new file mode 100644
index 000000000..97e9965f9
--- /dev/null
+++ b/__test__/FileSystem.test.ts
@@ -0,0 +1,300 @@
+/*
+关于webCAD 文件系统的原型.
+包括了对象的保存,撤销,还原.
+
+对象的绘制 更新.
+
+对象ID更新 引用
+
+材质字典
+
+关于对象的撤销和重做设计.
+
+
+*/
+
+
+class CADObject
+{
+
+    ApplyUndoData(data: any)
+    {
+
+    }
+}
+
+
+/**
+ * 表示了一个图纸该有的数据结构
+ * 
+ * @class Database
+ */
+class Database extends CADObject
+{
+
+    private curUndoIndex = -1;
+    //命令撤销数据列表
+    commandUndoData: { cmdName: string, undoData: Map<CADObject, UndoFile> }[] = [];
+
+
+    get UndoData(): Map<CADObject, UndoFile>
+    {
+        if (this.commandUndoData.length == 0)
+        {
+            this.startCmd("");
+        }
+        return this.commandUndoData[this.commandUndoData.length - 1].undoData;
+    }
+
+    startCmd(cmdName: string)
+    {
+        if (this.commandUndoData.length > 0 && this.curUndoIndex != this.commandUndoData.length - 1)
+        {
+            this.commandUndoData.splice(this.curUndoIndex, this.commandUndoData.length - this.curUndoIndex);
+        }
+
+        this.commandUndoData.push({ cmdName: "", undoData: new Map<CADObject, UndoFile>() });
+        this.curUndoIndex = this.commandUndoData.length - 1;
+    }
+
+    Undo(cout: number)
+    {
+        if (this.curUndoIndex == -1)
+        {
+            return;
+        }
+
+        for (let [obj, data] of this.commandUndoData[this.curUndoIndex].undoData)
+        {
+            for (let i = data.m_UndoDataList.length; i--;)
+            {
+                let d = data.m_UndoDataList[i];
+                obj.ApplyUndoData(d);
+            }
+        }
+
+        this.curUndoIndex--;
+    }
+    Redo(cout: number)
+    {
+        for (let i = this.curUndoIndex + 1; i < this.commandUndoData.length; i++)
+        {
+            for (let [obj, data] of this.commandUndoData[i].undoData)
+            {
+                for (let d of data.m_UndoDataList)
+                {
+                    obj.ApplyUndoData(d);
+                }
+            }
+        }
+    }
+}
+
+let arr = [0, 1, 2, 3, 4, 5, 6];
+arr.splice(3, arr.length - 3);
+
+arr
+
+
+/**
+ * 
+ * 
+ * @class UndoFile
+ */
+class UndoFile
+{
+    m_UndoDataList = [];
+}
+
+
+
+
+enum EntityUndoType
+{
+
+}
+
+//
+interface EntityData
+{
+    id: number;
+    isErase: boolean;
+}
+
+/**
+ * 
+ * 所有图元的基类
+ * 
+ * @class Entity
+ */
+class Entity extends CADObject
+{
+    protected m_Data: EntityData;
+    m_Db: Database;
+    constructor()
+    {
+        super();
+        this.m_Data = {
+            id: -1,
+            isErase: false
+        }
+    }
+
+
+    get UndoFile(): UndoFile
+    {
+        if (this.m_Db)
+        {
+            let undoData = this.m_Db.UndoData;
+            if (!undoData.has(this))
+            {
+                undoData.set(this, new UndoFile());
+            }
+            return undoData.get(this);
+        }
+    }
+
+    WriteUndoData(data: any)
+    {
+        let undoFile = this.UndoFile;
+        if (undoFile)
+        {
+            undoFile.m_UndoDataList.push(data);
+        }
+    }
+}
+
+
+/**
+ * 直线撤销类型
+ * 
+ * @enum {number}
+ */
+enum LineUndoType 
+{
+    Full = 0,
+    StartPoint = 1,
+    EndPoint = 2,
+}
+
+//
+interface LineData extends EntityData
+{
+    startPoint: number[],
+    endPoint: number[]
+}
+
+/**
+ * 直线对象
+ * 
+ * @class Line
+ */
+class Line extends Entity
+{
+    protected m_Data: LineData;
+    constructor()
+    {
+        super();
+        this.m_Data.startPoint = [0, 0, 0];
+        this.m_Data.endPoint = [0, 0, 0];
+    }
+    get StartPoint(): number[]
+    {
+        return this.m_Data.startPoint;
+    }
+    set StartPoint(value: number[])
+    {
+        this.WriteUndoData({ type: LineUndoType.StartPoint, data: { startPoint: this.m_Data.startPoint } });
+        this.m_Data.startPoint = value;
+    }
+
+    ApplyUndoData(data: any)
+    {
+        switch (data.type)
+        {
+            case LineUndoType.Full:
+                break;
+            case LineUndoType.StartPoint:
+                this.m_Data.startPoint = data.data.startPoint;
+                break;
+            default:
+                break;
+        }
+    }
+}
+
+/**
+ * 图纸绘制适配器,使用适配器绘制对象图元.
+ * 
+ * @class EentiyDrawAdapter
+ */
+class EentiyDrawAdapter
+{
+    Draw(): THREE.Object3D
+    {
+        return undefined;
+    }
+}
+
+
+/**
+ * 直线的绘制适配
+ * 
+ * @class LineAdapter
+ * @extends {EentiyDrawAdapter}
+ */
+class LineAdapter extends EentiyDrawAdapter
+{
+    Draw(): THREE.Object3D
+    {
+        return undefined;
+    }
+
+    Update(type: number)
+    {
+        switch (type)
+        {
+            case LineUndoType.Full:
+                break;
+            case LineUndoType.StartPoint:
+                break;
+            case LineUndoType.EndPoint:
+                break;
+            default:
+                break;
+        }
+    }
+}
+
+
+let line = new Line();
+
+console.log(line);
+
+line.StartPoint = [1, 2, 3];
+
+console.log(line);
+
+
+let db = new Database();
+
+line.m_Db = db;
+
+
+line.StartPoint = [3, 3, 3];
+
+console.log(line);
+line.StartPoint = [3, 3, 5];
+
+line.StartPoint = [12, 3, 5];
+console.log(line);
+
+console.log(db.commandUndoData);
+
+db.Undo(1);
+
+console.log(line);
+
+db.Redo(1);
+
+console.log(line.StartPoint);
diff --git a/__test__/Geometry/__snapshots__/intersect.test.ts.snap b/__test__/Geometry/__snapshots__/intersect.test.ts.snap
index d347a20ee..76d7ed1a6 100644
--- a/__test__/Geometry/__snapshots__/intersect.test.ts.snap
+++ b/__test__/Geometry/__snapshots__/intersect.test.ts.snap
@@ -9,3 +9,11 @@ Vector3 {
 `;
 
 exports[`相交测试 2`] = `undefined`;
+
+exports[`相交测试 3`] = `
+Vector3 {
+  "x": 0.5,
+  "y": 5,
+  "z": 0,
+}
+`;