完善直线的拉伸测试

__test__/Line/__snapshots__/line.test.ts.snap

@@ -1,5 +1,37 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`拉伸直线的夹点 1`] = `
+Vector3 {
+  "x": 0,
+  "y": 10,
+  "z": 0,
+}
+`;
+
+exports[`拉伸直线的夹点 2`] = `
+Vector3 {
+  "x": 10,
+  "y": 5,
+  "z": 0,
+}
+`;
+
+exports[`拉伸直线的夹点 3`] = `
+Vector3 {
+  "x": 0,
+  "y": 10,
+  "z": 0,
+}
+`;
+
+exports[`拉伸直线的夹点 4`] = `
+Vector3 {
+  "x": 15,
+  "y": 5,
+  "z": 0,
+}
+`;
+
 exports[`最近点 1`] = `
 Vector3 {
   "x": -2.5,

__test__/Line/line.test.ts

@@ -128,3 +128,28 @@ test('最近点', () =>
     expect(l.GetClosestPointTo(new Vector3(-5, 0, 0), false)/*?*/).toMatchSnapshot();//0,0,0.
 
 });
+
+
+
+test('拉伸直线的夹点', () =>
+{
+
+    let line = new Line(new Vector3(0, 0, 0), new Vector3(10, 0, 0));
+
+    //测试拉伸一个参数
+    line.MoveStretchPoints([0], new Vector3(0, 5, 0));
+
+    expect(line.StartPoint.toArray()).toMatchObject([0, 5, 0]);
+
+    //测试同时拉伸2个点的情况下
+    line.MoveStretchPoints([0, 1], new Vector3(0, 5, 0));
+
+    expect(line.StartPoint /*?*/).toMatchSnapshot();
+    expect(line.EndPoint /*?*/).toMatchSnapshot();
+
+
+    line.MoveStretchPoints([1], new Vector3(5, 0, 0));
+
+    expect(line.StartPoint).toMatchSnapshot();
+    expect(line.EndPoint).toMatchSnapshot();
+});

src/DatabaseServices/Entity.ts

@@ -204,6 +204,14 @@ export class Entity extends CADObject
     {
         return [];
     }
+
+    /**
+     * 拉伸夹点,用于Stretch命令
+     * 
+     * @param {Array<number>} indexList 拉伸点索引列表.
+     * @param {THREE.Vector3} vec 移动向量
+     * @memberof Entity
+     */
     MoveStretchPoints(indexList: Array<number>, vec: THREE.Vector3)
     {