From 445c8ad1606cc9fc0b21c3892971a31c18d1de0d Mon Sep 17 00:00:00 2001
From: kenshin <420373550@qq.com>
Date: Tue, 20 Apr 2021 15:43:31 +0800
Subject: [PATCH] avoid mesh data leak. (#8413)

* release mesh data.

* mesh maybe share with other object, so just modify the batch utils.

* remove empty space.

* remove empty space.
---
 cocos/3d/misc/batch-utils.ts | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/cocos/3d/misc/batch-utils.ts b/cocos/3d/misc/batch-utils.ts
index a3fb17870d4..c67a4891021 100644
--- a/cocos/3d/misc/batch-utils.ts
+++ b/cocos/3d/misc/batch-utils.ts
@@ -102,13 +102,18 @@ export class BatchingUtility {
      * @param batchedRoot the target output node
      */
     public static unbatchStaticModel (staticModelRoot: Node, batchedRoot: Node) {
-        const models = staticModelRoot.getComponentsInChildren('cc.MeshRenderer');
+        const models = staticModelRoot.getComponentsInChildren(MeshRenderer);
         for (let i = 0; i < models.length; i++) {
             const comp = models[i];
             comp.enabled = true;
         }
-        const batchedModel = batchedRoot.getComponent('cc.MeshRenderer');
-        if (batchedModel) { batchedModel.destroy(); }
+        const batchedModel = batchedRoot.getComponent(MeshRenderer);
+        if (batchedModel) {
+            if (batchedModel.mesh) {
+                batchedModel.mesh.destroyRenderingMesh();
+            }
+            batchedModel.destroy();
+        }
         return true;
     }
 }