开发:清理

src/DatabaseServices/Entity/Entity.ts

@@ -72,6 +72,8 @@ export class Entity extends CADObject
 
     set Material(materialId: ObjectId)
     {
+        if (materialId === this.materialId) return;
+
         this.WriteAllObjectRecord();
         this.materialId = materialId;
         for (let [type, obj] of this._CacheDrawObject)