修复材质导出问题，添加库打包模式

src/common/MaterialSerializer.ts

@@ -1,9 +1,22 @@
-import { CADFiler, Database, DuplicateRecordCloning, PhysicalMaterialRecord } from "webcad_ue4_api";
+import { CADFactory, CADFiler, CADObject, Database, DuplicateRecordCloning, ObjectId, PhysicalMaterialRecord } from "webcad_ue4_api";
+
+// TODO: Danger: 注意入侵性代码
+// 疑似是WebCAD中的漏洞，当传入new Database()时，
+// Database中的filer.ReadObject方法并不会为CadObject.objectId赋值，
+// 导致后续的CadObject.Id.Index发生空指针异常
+// 因此需要修改CAD中的Database.AllocationObjectId，尝试手动赋值
+// @ts-ignore
+Database.prototype.AllocationObjectId = function (this: Database, object: CADObject) {
+    if (object.Id === undefined) object.objectId = new ObjectId(undefined, undefined);
+    // @ts-ignore
+    object.Id.Index = this.idIndex++;
+    // @ts-ignore
+    this.idMap.set(object.Id.Index, object.Id);
+}
 
 export function MaterialOut(material: PhysicalMaterialRecord): string
 {
     let db = new Database();
-    debugger;
     db.WblockCloneObejcts(
         [material],
         db.MaterialTable,