From bc1cd5dafefe8ee4a6a2b48e7e70c5f102b9d244 Mon Sep 17 00:00:00 2001 From: BlueRose <378100977@qq.com> Date: Thu, 3 Oct 2024 09:17:08 +0800 Subject: [PATCH] vault backup: 2024-10-03 09:17:08 --- .../RenderingPipeline/Materials/MeshDraw.md | 81 ++++++++++--------- 1 file changed, 41 insertions(+), 40 deletions(-) diff --git a/03-UnrealEngine/Rendering/RenderingPipeline/Materials/MeshDraw.md b/03-UnrealEngine/Rendering/RenderingPipeline/Materials/MeshDraw.md index 623ede9..6fd93fb 100644 --- a/03-UnrealEngine/Rendering/RenderingPipeline/Materials/MeshDraw.md +++ b/03-UnrealEngine/Rendering/RenderingPipeline/Materials/MeshDraw.md @@ -59,18 +59,24 @@ SetGraphicsPipelineState(RHICmdList, GraphicsPSOInit,0); - uint32 StencilRef = 0; ### FRHIBlendState +使用***FBlendStateInitializerRHI()*** 进行初始化。 它定义了8个渲染对象，一般我们只用第一组，它的七个参数分别是： -- 颜色写入蒙版 -- 颜色混合运算 -- 颜色源混合因子 -- 颜色目标混合因子 -- Alpha混合运算 -- Alpha源混合因子 -- Alpha目标混合因子 +- Color + - Color Write Mask + - Color Blend 混合类型 + - Color Src 混合因子 + - Color Dest 混合因子 +- Alpha + - Alpha Blend 混合类型 + - Alpha Src 混合因子 + - Alpha Dest 混合因子 + +```c++ +FRHIBlendState* CopyBlendState = TStaticBlendState::GetRHI(); +``` 颜色写入蒙版： - -```text +```c++ enum EColorWriteMask { CW_RED = 0x01, @@ -88,44 +94,39 @@ enum EColorWriteMask }; ``` -要继续讲解其他参数，需要先列出DirectX的[混合方程](https://zhida.zhihu.com/search?content_id=217472065&content_type=Article&match_order=1&q=%E6%B7%B7%E5%90%88%E6%96%B9%E7%A8%8B&zhida_source=entity)作为参照： -C = C_{src} \otimes F_{src} \oplus C_{dst} \otimes F_{dst}_C_=_Csrc_​⊗_Fsrc_​⊕_Cdst_​⊗_Fdst_​A = A_{src} \otimes F_{src} \oplus A_{dst} \otimes F_{dst}_A_=_Asrc_​⊗_Fsrc_​⊕_Adst_​⊗_Fdst_​ - -第一个是颜色的混合方程，第二个是Alpha的混合方程。 ### 混合运算 - 混合运算符对于颜色混合方程和Alpha混合方程效果是一样的，这里就只用颜色混合方程来做讲解。 -|BlendOperation|颜色混合方程| -|---|---| -|BO_Add|C_{src} \otimes F_{src} + C_{dst} \otimes F_{dst}Csrc​⊗Fsrc​+Cdst​⊗Fdst​| -|BO_Subtract|C = C_{src} \otimes F_{src} - C_{dst} \otimes F_{dst}C=Csrc​⊗Fsrc​−Cdst​⊗Fdst​| -|BO_ReverseSubtract|C = C_{dst} \otimes F_{dst} - C_{src} \otimes F_{src}C=Cdst​⊗Fdst​−Csrc​⊗Fsrc​| -|BO_Min|C = Min(C_{src} , C_{dst} )C=Min(Csrc​,Cdst​)| -|BO_Max|C = Max(C_{src} , C_{dst} )C=Max(Csrc​,Cdst​)| -|BO_Min和BO_Max忽略了混合因子|| +| BlendOperation | 颜色混合方程 | +| -------------------- | ---------------------------------------------------------------------------------- | +| BO_Add | $$C=C_{src} \otimes F_{src} + C_{dst} \otimes F_{dst}Csrc​⊗Fsrc​+Cdst​⊗Fdst$$​ | +| BO_Subtract | $$C = C_{src} \otimes F_{src} - C_{dst} \otimes F_{dst}C=Csrc​⊗Fsrc​−Cdst​⊗Fdst$$​ | +| BO_ReverseSubtract | $$C = C_{dst} \otimes F_{dst} - C_{src} \otimes F_{src}C=Cdst​⊗Fdst​−Csrc​⊗Fsrc$$​ | +| BO_Min | $$C = Min(C_{src} , C_{dst} )C=Min(Csrc​,Cdst​)$$ | +| BO_Max | $$C = Max(C_{src} , C_{dst} )C=Max(Csrc​,Cdst​)$$ | +| BO_Min和BO_Max忽略了混合因子 | | ### 混合因子 -| BlendFactor | 颜色混合因子 | Alpha混合因子 | -| ----------------------------- | ------------------------------------------------------------ | -------------------- | -| BF_Zero | F = (0,0,0)F=(0,0,0) | F=0F=0 | -| BF_One | F=(1,1,1)F=(1,1,1) | F=1F=1 | -| BF_SourceColor | F=(r_{src},g_{src},b_{src})F=(rsrc​,gsrc​,bsrc​) | – | -| BF_InverseSourceColor | F=(1-r_{src},1-g_{src},1-b_{src})F=(1−rsrc​,1−gsrc​,1−bsrc​) | – | -| BF_SourceAlpha | F=(a_{src},a_{src},a_{src})F=(asrc​,asrc​,asrc​) | F=a_{src}F=asrc​ | -| BF_InverseSourceAlpha | F=(1-a_{src},1-a_{src},1-a_{src})F=(1−asrc​,1−asrc​,1−asrc​) | F=1-a_{src}F=1−asrc​ | -| BF_DestAlpha | F=(a_{dst},a_{dst},a_{dst})F=(adst​,adst​,adst​) | F=a_{dst}F=adst​ | -| BF_InverseDestAlpha | F=(1-a_{dst},1-a_{dst},1-a_{dst})F=(1−adst​,1−adst​,1−adst​) | F=1-a_{dst}F=1−adst​ | -| BF_DestColor | F=(r_{dst},g_{dst},b_{dst})F=(rdst​,gdst​,bdst​) | – | -| BF_InverseDestColor | F=(1-r_{dst},1-g_{dst},1-b_{dst})F=(1−rdst​,1−gdst​,1−bdst​) | – | -| BF_ConstantBlendFactor | F=(r,g,b)F=(r,g,b) | F=aF=a | -| BF_InverseConstantBlendFactor | F=(1-r,1-g,1-b)F=(1−r,1−g,1−b) | F=1-aF=1−a | -| BF_Source1Color | 未知 | 未知 | -| BF_InverseSource1Color | 未知 | 未知 | -| BF_Source1Alpha | 未知 | 未知 | -| BF_InverseSource1Alpha | 未知 | 未知 | +| BlendFactor | 颜色混合因子 | Alpha混合因子 | +| ----------------------------- | ---------------------------------------------------------------- | ------------------------ | +| BF_Zero | $$F = (0,0,0)F=(0,0,0)$$ | $$F=0F=0$$ | +| BF_One | $$F=(1,1,1)F=(1,1,1)$$ | $$F=1F=1$$ | +| BF_SourceColor | $$F=(r_{src},g_{src},b_{src})F=(rsrc​,gsrc​,bsrc​)$$ | – | +| BF_InverseSourceColor | $$F=(1-r_{src},1-g_{src},1-b_{src})F=(1−rsrc​,1−gsrc​,1−bsrc​)$$ | – | +| BF_SourceAlpha | $$F=(a_{src},a_{src},a_{src})F=(asrc​,asrc​,asrc​)$$ | $$F=a_{src}F=asrc$$​ | +| BF_InverseSourceAlpha | $$F=(1-a_{src},1-a_{src},1-a_{src})F=(1−asrc​,1−asrc​,1−asrc​)$$ | $$F=1-a_{src}F=1−asrc$$​ | +| BF_DestAlpha | $$F=(a_{dst},a_{dst},a_{dst})F=(adst​,adst​,adst​)$$ | $$F=a_{dst}F=adst$$​ | +| BF_InverseDestAlpha | $$F=(1-a_{dst},1-a_{dst},1-a_{dst})F=(1−adst​,1−adst​,1−adst​)$$ | $$F=1-a_{dst}F=1−adst$$​ | +| BF_DestColor | $$F=(r_{dst},g_{dst},b_{dst})F=(rdst​,gdst​,bdst​)$$ | – | +| BF_InverseDestColor | $$F=(1-r_{dst},1-g_{dst},1-b_{dst})F=(1−rdst​,1−gdst​,1−bdst​)$$ | – | +| BF_ConstantBlendFactor | F=(r,g,b)F=(r,g,b) | F=aF=a | +| BF_InverseConstantBlendFactor | F=(1-r,1-g,1-b)F=(1−r,1−g,1−b) | F=1-aF=1−a | +| BF_Source1Color | 未知 | 未知 | +| BF_InverseSource1Color | 未知 | 未知 | +| BF_Source1Alpha | 未知 | 未知 | +| BF_InverseSource1Alpha | 未知 | 未知 | 最后四个选项没有在DirectX中找到对应的选项，没有继续探究，前面的应该足够一般使用了。 ### FRHIDepthStencilState