---
title: FVersionedNiagaraEmitterData API
source: https://dev.epicgames.com/documentation/en-us/unreal-engine/API/Plugins/Niagara/FVersionedNiagaraEmitterData
version: Unreal Engine 5.8 C++ API Reference
fetched: 2026-10-11
note: 原文摘录（英文要点），供 wiki 引用；非全文
---

# FVersionedNiagaraEmitterData API

没有找到 CPU/GPU 模拟对比的官方概念文档（5.8、5.0、4.27 的 Emitter Properties 页均重定向到首页）。API 层面事实：
- SimTarget (ENiagaraSimTarget), EditAnywhere Category Emitter.
- MaxGPUParticlesSpawnPerFrame: "An override on the max number of GPU particles we expect to spawn in a single frame." EditCondition SimTarget == GPUComputeSim.
- CalculateBoundsMode (ENiagaraEmitterCalculateBoundMode) "How should we calculate bounds for the emitter"; FixedBounds when mode is Fixed.
- GPUComputeScript (protected); bNeedsPartialDepthTexture "Indicates we use the partial depth textures"; bRequiresViewUniformBuffer "Indicates that the GPU script requires the view uniform buffer".
- bGpuAlwaysRunParticleUpdateScript: "GPU scripts were incorrectly running both particle spawn & update, CPU only runs spawn when interpolated spawning is disabled."
- bDeterminism / RandomSeed; bLocalSpace; AllocationMode / PreAllocationCount.