41 lines
899 B
Markdown
41 lines
899 B
Markdown
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---
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title: Particle
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date: 2026-05-03 00:00:00
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excerpt: ARC 引擎粒子系统修改分类索引
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tags:
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- ARC
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- Particle
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rating: ⭐
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---
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# Particle — 粒子系统
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返回 [[ARC引擎修改总览]]
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## 概述
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ARC 引擎对粒子系统的修改较为集中，主要新增了粒子驱动的点光源接口和静态网格切换功能。
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## 功能列表
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| 功能 | 文档 | 说明 |
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|------|------|------|
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| 粒子点光源系统 | [[粒子点光源系统]] | IREDPointLightInterface + 静态网格切换 |
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## 其他修改
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### MeshParticle VertexFactory 修复
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修复 4.25 版本的 MeshParticle 放置 Bug：
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```hlsl
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// MeshParticleVertexFactory.ush
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#if !PARTICLE_MESH_INSTANCED
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Result.InstanceLocalToWorld = Primitive_LocalToWorld;
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#else
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Result.InstanceLocalToWorld = ParticleTransform;
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#endif
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```
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非实例化模式下使用 `Primitive_LocalToWorld` 而非 `ParticleTransform`。
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