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fix(core): disable cache for SceneLoader to avoid loadScene self-destroy #2993

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fix(core): disable cache for SceneLoader to avoid loadScene self-destroy #2993

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fix(core): disable cache for SceneLoader to avoid loadScene self-destroy
cptbtptpbcptdtptp May 12, 2026
63b6b1f
test(loader): verify SceneLoader useCache is disabled
cptbtptpbcptdtptp May 12, 2026
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2 changes: 1 addition & 1 deletion packages/loader/src/SceneLoader.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -167,7 +167,7 @@ export function applySceneData(
return Promise.all(promises).then(() => {});
}

@resourceLoader(AssetType.Scene, ["scene"], true)
@resourceLoader(AssetType.Scene, ["scene"], false)
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@coderabbitai coderabbitai Bot May 12, 2026

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⚠️ Potential issue | 🟠 Major | 🏗️ Heavy lift

🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
# Verify resourceLoader third-arg semantics and scene load call-path impact (read-only).

set -euo pipefail

echo "== Locate resourceLoader declaration/signature =="
rg -n -C3 '\bfunction\s+resourceLoader\b|\bconst\s+resourceLoader\b|\bexport\s+function\s+resourceLoader\b'

echo
echo "== Find all Scene loader registrations and third argument values =="
rg -n -C2 '@resourceLoader\(\s*AssetType\.Scene'

echo
echo "== Find SceneManager.loadScene implementation and cache eviction logic =="
rg -n -C6 '\bclass\s+SceneManager\b|\bloadScene\s*\(' packages

echo
echo "== Find internal cache operations relevant to scene assets =="
rg -n -C4 '\b_deleteAsset\b|\bget\b.*Asset|virtualPath|cache' packages

Repository: galacean/engine

Length of output: 50371

The cache behavior change is global and affects additive scene loads unintentionally.

Setting useCache: false on the Scene loader registration at line 170 disables caching for all SceneManager.loadScene() calls, regardless of the destroyOldScene parameter. The resourceLoader decorator passes useCache to the loader constructor at registration time, not per-load call, so additive scene loads (destroyOldScene = false) will also bypass the cache. The PR objective specifies targeted cache eviction only when destroying old scenes, but this implementation affects both destructive and additive loads equally.

🤖 Prompt for AI Agents 
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@packages/loader/src/SceneLoader.ts` at line 170, The resourceLoader
registration currently sets useCache globally for AssetType.Scene (the decorator
at resourceLoader(AssetType.Scene, ["scene"], false)), which disables caching
for all SceneLoader instances and breaks additive loads; instead revert the
registration to allow normal caching and implement targeted eviction inside
SceneManager.loadScene: keep the decorator/SceneLoader registration default
(allow cache), and when loadScene(...) is called with destroyOldScene === true,
explicitly evict or reload the specific scene from the loader/cache (e.g., call
the SceneLoader instance's cache invalidation method or a
cache.clearFor(sceneId) function) before loading; reference
resourceLoader(AssetType.Scene,...), the SceneLoader class, and
SceneManager.loadScene(destroyOldScene) to locate and modify the code.

class SceneLoader extends Loader<Scene> {
load(item: LoadItem, resourceManager: ResourceManager): AssetPromise<Scene> {
const { engine } = resourceManager;
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