JujieX

**Is your feature request related to a problem? Please describe.** SpriteAltas support rotation, so that when the atlas algorithm enables rotation, the result pic could be more compact

**Describe the bug** ParticleRender startColor in Gradient Mode doesn't take effect **To Reproduce** ```ts main.startColor.mode = ParticleGradientMode.Gradient; const gradient = main.startColor.gradient; gradient.addColorKey(0, new Color(1, 0, 0, 1)); gradient.addColorKey(1, new Color(1,...

**Describe the bug** lost material after reassign lottieResource, show false pink material ```ts entity.getComponent(LottieAnimation).resource = null setTimeout(() => { entity.getComponent(LottieAnimation).resource = lottieSource }, 1000); ```

Playground 整体调整计划

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## 分类 ### benchmark 基准 增加 Engine.stats, 显示基准数据 ### playground 功能示例 能够简单清晰的展示特定功能点 ### example 效果示例 显示引擎水平的综合示例 ## 主要改造点 ### 拆分文件 因为重复代码多，主题不明确，每个拆成index.ts / material.ts / loader.ts 等几个，示例主要代码放在index中，其他几个代码片段可以重复使用 ### 整体风貌改造 1.换用PBR材质，材质颜色有色板 2.增加阴影，或者改变背景素材...

# Benchmark #### Animation - [ ] 增加 Stats, 改变视角看到更多模型 #### Lottie - [ ] 增加 Stats #### Spine - [ ] 增加 Stats #### Text # Playground - [...

**Is your feature request related to a problem? Please describe.** The framebuffer picker's size is dynamically configured to maintain a consistent ratio relative to the engine's canvas dimensions. For example,...

- use case ```ts _addEntityWireframe(entity: Entity, excludeComponent: Component = null, includeChildren = true): void { if (!this._visible) return; const wireframeManager = this._wireframeManager; if (includeChildren) { const components = new Array();...

**Is your feature request related to a problem? Please describe.** regardless of camera distance, the wireframe for light should always be the same on the screen

在react strict模式下使用useEffect的方式初始化引擎及场景，导致orbitControl在pad模式下单点点击便造成rotate