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22
03-UnrealEngine/VisualEffect/Niagara Module笔记.md
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@ -48,21 +48,39 @@ Particle的Module都是c++级别写死的。基本位于`Engine\Source\Runtime\E
## Niagara里面的相关类型 ## Niagara里面的相关类型
### DataInterface ### DataInterface
基类为UNiagaraDataInterface。 基类为UNiagaraDataInterface。
- UNiagaraDataInterface2DArrayTexture - UNiagaraDataInterfaceTexture：NiagaraDataInterfaceTextureTemplate.ush
- UNiagaraDataInterfaceVirtualTexture - LoadTexture2D()
- GatherRedTexture2D()
- SampleTexture2D()
- SamplePseudoVolumeTexture()
- GetTextureDimensions()
- GetNumMipLevels()
- UNiagaraDataInterface2DArrayTexture：NiagaraDataInterfaceTexture2DArrayTemplate.ush
- LoadTexture()
- GatherRedTexture()
- SampleTexture()
- TextureDimension()
- UNiagaraDataInterfaceVirtualTexture：NiagaraDataInterfaceVirtualTextureTemplate.ush
- GetAttributesValid()
- SampleRVTLayer()
- SampleRVT()
## Texture相关Module ## Texture相关Module
- Textures - Textures
- SampleTexture - SampleTexture
- SamplePseudoVolumeTexture - SamplePseudoVolumeTexture
- 主要调用SamplePseudoVolumeTexture()
- SubUV_TextureSample - SubUV_TextureSample
-
- WorldAlignedTextureSample - WorldAlignedTextureSample
- SubUV - SubUV
- SubUVAnimation - SubUVAnimation
- V2 - V2
- SubUVAnimation - SubUVAnimation
里面的一些节点调用一些函数，这些函数都在对应的**UNiagaraDataInterface**中的**GetFunctions()** 定义，具体的逻辑位于 对应的**xxxTemplate.ush**
## 生成的代码 ## 生成的代码
高斯3D里Niagara采用PositionTexture生成的相关代码：
```c++ ```c++
int2 Emitter_SampleTexture_Texture_TextureSize; int2 Emitter_SampleTexture_Texture_TextureSize;
int Emitter_SampleTexture_Texture_MipLevels; int Emitter_SampleTexture_Texture_MipLevels;