ディレクショナルライトなどのライト以外のエミッシブサーフェイスも光源になります
というデモ

高速化や安定化, いくつかのProbeアプローチを試しています.
動画はScreenProbeタイプの実装.

詳細はtwitter X へどうぞ
https://x.com/nagakagachi

2026-05-03

Global Illumination WIP 2

Irradianceまで繋いだので進捗.
しかしこの方式はディティールレベルは高いが負荷を下げにくいので別の手法も試し中.
www.youtube.com

高頻度進捗はTwitterX

Dynamic Object
Dynamic Geometry
Dynamic Material
Dynamic Light

Global Illumination

(ﾟ∀ﾟ) pic.twitter.com/KGMkqZqUXM
— なが (@nagakagachi) 2026年5月2日

(WIP)
World Aligned Probe Dynamic Diffuse GI

Enshrouded資料のアイデアを使ったFrustum Probe Placementな動的Probe

Light Leak/(Dark Probe) が目立つがそれなりに動作 pic.twitter.com/PdEasyIXXW
— なが (@nagakagachi) 2026年5月2日

2026-04-25

Light Propagation Volumes (LPV) の radiance directional derivative によるLight Leak対策

Light Propagation Volumes in CryEngine 3 [1] で Radiance Volumeからのサンプリング時Leakを抑える手法として

6.3 Anisotropic upsampling of radiance volume

で言及されている direction-dependent upsampling of the resulting radiance volume がよくわからなかったので調べた結果です.
コードとしてはGI-LPV[2]のリポジトリの indirect_light.fp [3]で実際に記述されていたのが参考になりました.

https://advances.realtimerendering.com/s2009/Light_Propagation_Volumes.pdf

SH VolumeのSH係数を補間する際に裏側から漏れ出ていそうな成分をキャンセルするためのもの.
SH Volume からシェーディング点のSH係数をサンプリングした後, シェーディング法線方向に沿ったSH係数の方向微分も計算します.
(実際に前後の点でサンプリングしています)

$\nabla_{\mathbf{n}} \mathbf{c}(\mathbf{x}) = \frac{ \mathbf{c}\!\left(\mathbf{x} + \frac{\mathbf{n}}{2}\right) - \mathbf{c}\!\left(\mathbf{x} - \frac{\mathbf{n}}{2}\right) }{ \lVert \mathbf{n} \rVert }$

SH係数の方向微分のベクトルとシェーディング点のSH係数の内積を類似度をみなして,

類似度が高い
裏側→表側へのSH変化量がそのままシェーディング点のSHに影響している
裏側のSHが漏れ出ている疑惑が強い

ということで, その場合はシェーディング点のSHによる寄与を減らす(dampening) しています.

この手法はあくまでleakしていそうだったら減衰させているだけで, より良いSHのサンプリングをするというものではなさそうです.
この前段階で法線バイアス等で十分Leakを避けるためのサンプリング点補正をしたうえでの, 最終調整という位置づけが良いのかもしれないです.

LPV

[1] https://advances.realtimerendering.com/s2009/Light_Propagation_Volumes.pdf
[2] GitHub - innovation-cat/GI-LPV: Implement global illumination with OCaml, using light propagation volumes . · GitHub
[3] GI-LPV/shader/indirect_light.fp at master · innovation-cat/GI-LPV · GitHub

2026-03-29

Global Illumination WIP 1

そこそこ出来てきたので動画をアップロードしてブログにも
思想と仕組みはそのうちまとめたい

ポータビリティ重視
既存のラスタライズレンダリングパイプラインへの組み込み容易性を重視
ハードウェアレイトレーシング不使用

www.youtube.com

DirectX12ネイティブアプリで実装中
GIといいつつ現状はSkyVisibilityのみ
UE5でも単なるプラグインとして動作動作させられるので検討したいところ

2026-03-08

Concurrent Binary Trees for Large-Scale Game Components 検証実装

Adaptive Software Tessellation with Concurrent Binary Trees

数年前に実装したものですが検索性が良くないのでこちらにも
一般メッシュに適用可能なGPU駆動ソフトウェアテッセレーションの手法を試してみました。
論文の主要処理はすべてComputeShaderになります。

GitHub - nagakagachi/sample_project · GitHub

今回の手法の論文はこちら
Concurrent Binary Trees for Large-Scale Game Components
ANIS BENYOUB, Intel Corporation, France
JONATHAN DUPUY, Intel Corporation, France
https://dl.acm.org/doi/10.1145/3675371

著者の以前のTessellation論文にもConcurrentBinaryTree(CBT)を使ったものがありますが、
そちらは二等辺直角三角形に限定して、分割三角形の親子構造をCBTにマッピングする手法です。
Concurrent Binary Trees (with application to longest edge bisection)
JONATHAN DUPUY, Unity Technologies
https://dl.acm.org/doi/10.1145/3406186

一方で今回の論文は任意のメッシュに対して実行可能で、CBTを分割三角形の高速なメモリアロケーションのために利用しています。
CBT(並行二分木)を利用する仕組み上、メモリ確保が二の冪乗に制限されるなど少し取り回しが悪い点などがありますが、
一般メッシュに適用できてリアルタイムに動かせそうなソフトウェアテッセレーション手法としてよい感じかと思います。

コードはディレクトリにまとまっています。
実行はmain.cppの NGL_TEST_SWTESSELLATION_ENABLE を 1 にしてビルドするとシーンにテスト用のオブジェクトが表示されます。

2026-02-04

UEマテリアルネタ:LatticeBasedDynamicDeform

コンセプト実装メモ

material

Begin Object Class=/Script/UnrealEd.MaterialGraphNode Name="MaterialGraphNode_0" ExportPath="/Script/UnrealEd.MaterialGraphNode'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_0'"
   Begin Object Class=/Script/Engine.MaterialExpressionAbs Name="MaterialExpressionAbs_3" ExportPath="/Script/Engine.MaterialExpressionAbs'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_0.MaterialExpressionAbs_3'"
   End Object
   Begin Object Name="MaterialExpressionAbs_3" ExportPath="/Script/Engine.MaterialExpressionAbs'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_0.MaterialExpressionAbs_3'"
      Input=(Expression="/Script/Engine.MaterialExpressionAdd'MaterialGraphNode_42.MaterialExpressionAdd_3'")
      MaterialExpressionEditorX=1136
      MaterialExpressionEditorY=-544
      MaterialExpressionGuid=618A1FEA4EC7BE62FCDD5E8775143A99
      Material="/Script/UnrealEd.PreviewMaterial'/Engine/Transient.M_DynamicLatticeDeform'"
   End Object
   MaterialExpression="/Script/Engine.MaterialExpressionAbs'MaterialExpressionAbs_3'"
   NodePosX=1136
   NodePosY=-544
   NodeGuid=CE61B2744816A6DBBE259A8A85CF33D1
   CustomProperties Pin (PinId=156D96F34497F69979397E8818DDAA80,PinName="Input",PinFriendlyName=NSLOCTEXT("MaterialGraphNode", "Space", " "),PinType.PinCategory="required",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(MaterialGraphNode_42 638E8D69403BED61E274A8B4B591B5B2,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=A188A0A94A3ABCE76D74CBACF77286CB,PinName="Output",PinFriendlyName=NSLOCTEXT("MaterialGraphNode", "Space", " "),Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(MaterialGraphNode_Root_0 891CD1634EE6E02E4C957587C39198A8,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/UnrealEd.MaterialGraphNode_Knot Name="MaterialGraphNode_Knot_0" ExportPath="/Script/UnrealEd.MaterialGraphNode_Knot'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_Knot_0'"
   Begin Object Class=/Script/Engine.MaterialExpressionReroute Name="MaterialExpressionReroute_12" ExportPath="/Script/Engine.MaterialExpressionReroute'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_Knot_0.MaterialExpressionReroute_12'"
   End Object
   Begin Object Name="MaterialExpressionReroute_12" ExportPath="/Script/Engine.MaterialExpressionReroute'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_Knot_0.MaterialExpressionReroute_12'"
      Input=(Expression="/Script/Engine.MaterialExpressionMultiply'MaterialGraphNode_2.MaterialExpressionMultiply_2'")
      MaterialExpressionEditorX=976
      MaterialExpressionEditorY=-208
      MaterialExpressionGuid=D01463B44F12A864E234EC9154BA4F4D
      Material="/Script/UnrealEd.PreviewMaterial'/Engine/Transient.M_DynamicLatticeDeform'"
   End Object
   MaterialExpression="/Script/Engine.MaterialExpressionReroute'MaterialExpressionReroute_12'"
   NodePosX=976
   NodePosY=-208
   bCanRenameNode=False
   NodeGuid=07FAF5574724F26F6167ECB9CB797F61
   CustomProperties Pin (PinId=97EDD58C47AE5B073D3CDB8814F46B2F,PinName="InputPin",PinType.PinCategory="wildcard",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(MaterialGraphNode_2 608B93C641BAB0594CDAE980C0CE0A02,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=True,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=21AEB43349A80F4819E79EB40151FE29,PinName="OutputPin",Direction="EGPD_Output",PinType.PinCategory="wildcard",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(MaterialGraphNode_Root_0 DD29B3E54B43BBF923E58ABB0F6F9D66,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/UnrealEd.MaterialGraphNode Name="MaterialGraphNode_1" ExportPath="/Script/UnrealEd.MaterialGraphNode'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_1'"
   Begin Object Class=/Script/Engine.MaterialExpressionConstant3Vector Name="MaterialExpressionConstant3Vector_0" ExportPath="/Script/Engine.MaterialExpressionConstant3Vector'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_1.MaterialExpressionConstant3Vector_0'"
   End Object
   Begin Object Name="MaterialExpressionConstant3Vector_0" ExportPath="/Script/Engine.MaterialExpressionConstant3Vector'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_1.MaterialExpressionConstant3Vector_0'"
      Constant=(R=0.459925,G=1.000000,B=0.787798,A=1.000000)
      MaterialExpressionEditorX=672
      MaterialExpressionEditorY=-640
      MaterialExpressionGuid=7758F61D4157B553ADEB50832122AC48
      Material="/Script/UnrealEd.PreviewMaterial'/Engine/Transient.M_DynamicLatticeDeform'"
   End Object
   MaterialExpression="/Script/Engine.MaterialExpressionConstant3Vector'MaterialExpressionConstant3Vector_0'"
   NodePosX=672
   NodePosY=-640
   NodeGuid=390B70A44C94166617D31AAE48BE9615
   CustomProperties Pin (PinId=7204CBA74608D483362C0C9202E27153,PinName="Constant",PinType.PinCategory="optional",PinType.PinSubCategory="rgb",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,DefaultValue="0.459925,1.0,0.787798",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=True,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=597429E44A337F8EFF998AA7539751D0,PinName="Output",PinFriendlyName=NSLOCTEXT("MaterialGraphNode", "Space", " "),Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(MaterialGraphNode_42 70AB43564198A863B0FCD4B9F291912C,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=71766138468B78919B60418D85F3C377,PinName="Output2",PinFriendlyName=NSLOCTEXT("MaterialGraphNode", "Space", " "),Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="red",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=6B7C31E142A541962D99C09701901DC5,PinName="Output3",PinFriendlyName=NSLOCTEXT("MaterialGraphNode", "Space", " "),Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="green",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=01F385CB49E1FF5FE7BC1087DD75BD33,PinName="Output4",PinFriendlyName=NSLOCTEXT("MaterialGraphNode", "Space", " "),Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="blue",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/UnrealEd.MaterialGraphNode Name="MaterialGraphNode_2" ExportPath="/Script/UnrealEd.MaterialGraphNode'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_2'"
   Begin Object Class=/Script/Engine.MaterialExpressionMultiply Name="MaterialExpressionMultiply_2" ExportPath="/Script/Engine.MaterialExpressionMultiply'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_2.MaterialExpressionMultiply_2'"
   End Object
   Begin Object Name="MaterialExpressionMultiply_2" ExportPath="/Script/Engine.MaterialExpressionMultiply'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_2.MaterialExpressionMultiply_2'"
      A=(Expression="/Script/Engine.MaterialExpressionCustom'MaterialGraphNode_Custom_0.MaterialExpressionCustom_2'")
      B=(Expression="/Script/Engine.MaterialExpressionMultiply'MaterialGraphNode_12.MaterialExpressionMultiply_5'")
      ConstB=10.000000
      MaterialExpressionEditorX=592
      MaterialExpressionEditorY=112
      MaterialExpressionGuid=801405D641B41ABE8B4088BC7144E91F
      Material="/Script/UnrealEd.PreviewMaterial'/Engine/Transient.M_DynamicLatticeDeform'"
   End Object
   MaterialExpression="/Script/Engine.MaterialExpressionMultiply'MaterialExpressionMultiply_2'"
   NodePosX=592
   NodePosY=112
   NodeGuid=767DE87C464CBBEF8CD726B7B8620BEA
   CustomProperties Pin (PinId=271BA5D84DF16892008A6D9BB82E3788,PinName="A",PinType.PinCategory="optional",PinType.PinSubCategory="red",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,DefaultValue="0.0",LinkedTo=(MaterialGraphNode_Custom_0 AF4C1E69462CCBD59FD6CDAFD9A95BED,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=F66B95B44E6BA4EB1ECDB4877EB38891,PinName="B",PinType.PinCategory="optional",PinType.PinSubCategory="red",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,DefaultValue="10.0",LinkedTo=(MaterialGraphNode_12 79FF34B04F50FBE02A39B7A5E1418FD6,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=608B93C641BAB0594CDAE980C0CE0A02,PinName="Output",PinFriendlyName=NSLOCTEXT("MaterialGraphNode", "Space", " "),Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(MaterialGraphNode_Knot_0 97EDD58C47AE5B073D3CDB8814F46B2F,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/UnrealEd.MaterialGraphNode_Custom Name="MaterialGraphNode_Custom_0" ExportPath="/Script/UnrealEd.MaterialGraphNode_Custom'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_Custom_0'"
   Begin Object Class=/Script/Engine.MaterialExpressionCustom Name="MaterialExpressionCustom_2" ExportPath="/Script/Engine.MaterialExpressionCustom'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_Custom_0.MaterialExpressionCustom_2'"
   End Object
   Begin Object Name="MaterialExpressionCustom_2" ExportPath="/Script/Engine.MaterialExpressionCustom'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_Custom_0.MaterialExpressionCustom_2'"
      Code="const int3 lattice_vtx_count = in_lattice_reso - 1;\r\n\r\nconst bool is_valid_lattice_id = all(0 <= in_lattice_id) && all(in_lattice_id <= (lattice_vtx_count-1));\r\nconst float3 lattice_cell_size = in_lattice_size / lattice_vtx_count;\r\n\r\n\r\nfloat3 pos_deform = float3(0.0, 0.0, 0.0);\r\n\r\nfloat debug_weight = 0.0;\r\nfloat debug_vtx = 0.0;\r\n\r\nif(is_valid_lattice_id)\r\n{\r\n  const float3 vtx_w0 = 1.0 - in_lattice_uvw;\r\n  const float3 vtx_w1 = in_lattice_uvw;\r\n\r\n  const int ay = in_lattice_reso.x;\r\n  const int az = in_lattice_reso.x*in_lattice_reso.y;\r\n  const int vtx_i0 = (in_lattice_id.x) +   (in_lattice_id.y)*ay +   (in_lattice_id.z)*az;\r\n  const int vtx_i1 = (in_lattice_id.x+1) + (in_lattice_id.y)*ay +   (in_lattice_id.z)*az;\r\n  const int vtx_i2 = (in_lattice_id.x) +   (in_lattice_id.y+1)*ay + (in_lattice_id.z)*az;\r\n  const int vtx_i3 = (in_lattice_id.x+1) + (in_lattice_id.y+1)*ay + (in_lattice_id.z)*az;\r\n  const int vtx_i4 = (in_lattice_id.x) +   (in_lattice_id.y)*ay +   (in_lattice_id.z+1)*az;\r\n  const int vtx_i5 = (in_lattice_id.x+1) + (in_lattice_id.y)*ay +   (in_lattice_id.z+1)*az;\r\n  const int vtx_i6 = (in_lattice_id.x) +   (in_lattice_id.y+1)*ay + (in_lattice_id.z+1)*az;\r\n  const int vtx_i7 = (in_lattice_id.x+1) + (in_lattice_id.y+1)*ay + (in_lattice_id.z+1)*az;\r\n\r\n\r\n  float4 vtx_accum = (float4)0.0;\r\n  vtx_accum += in_lattice_vtx_tex.Load(int3(vtx_i0, 0, 0)) * (vtx_w0.x)*(vtx_w0.y)*(vtx_w0.z);\r\n  vtx_accum += in_lattice_vtx_tex.Load(int3(vtx_i1, 0, 0)) * (vtx_w1.x)*(vtx_w0.y)*(vtx_w0.z);\r\n  vtx_accum += in_lattice_vtx_tex.Load(int3(vtx_i2, 0, 0)) * (vtx_w0.x)*(vtx_w1.y)*(vtx_w0.z);\r\n  vtx_accum += in_lattice_vtx_tex.Load(int3(vtx_i3, 0, 0)) * (vtx_w1.x)*(vtx_w1.y)*(vtx_w0.z);\r\n  vtx_accum += in_lattice_vtx_tex.Load(int3(vtx_i4, 0, 0)) * (vtx_w0.x)*(vtx_w0.y)*(vtx_w1.z);\r\n  vtx_accum += in_lattice_vtx_tex.Load(int3(vtx_i5, 0, 0)) * (vtx_w1.x)*(vtx_w0.y)*(vtx_w1.z);\r\n  vtx_accum += in_lattice_vtx_tex.Load(int3(vtx_i6, 0, 0)) * (vtx_w0.x)*(vtx_w1.y)*(vtx_w1.z);\r\n  vtx_accum += in_lattice_vtx_tex.Load(int3(vtx_i7, 0, 0)) * (vtx_w1.x)*(vtx_w1.y)*(vtx_w1.z);\r\n\r\n  pos_deform = vtx_accum;\r\n}\r\n\r\nreturn pos_deform;\r\n\r\n"
      Inputs(0)=(InputName="in_lattice_id",Input=(Expression="/Script/Engine.MaterialExpressionNamedRerouteDeclaration'MaterialGraphNode_7.MaterialExpressionNamedRerouteDeclaration_0'"))
      Inputs(1)=(InputName="in_lattice_uvw",Input=(Expression="/Script/Engine.MaterialExpressionNamedRerouteDeclaration'MaterialGraphNode_4.MaterialExpressionNamedRerouteDeclaration_1'"))
      Inputs(2)=(InputName="in_lattice_reso",Input=(Expression="/Script/Engine.MaterialExpressionReroute'MaterialGraphNode_Knot_1.MaterialExpressionReroute_1'"))
      Inputs(3)=(InputName="in_lattice_size",Input=(Expression="/Script/Engine.MaterialExpressionReroute'MaterialGraphNode_Knot_2.MaterialExpressionReroute_2'"))
      Inputs(4)=(InputName="in_lattice_vtx_tex",Input=(Expression="/Script/Engine.MaterialExpressionTextureObjectParameter'MaterialGraphNode_10.MaterialExpressionTextureObjectParameter_0'"))
      Inputs(5)=(InputName="in_lattice_vtx_texel_size",Input=(Expression="/Script/Engine.MaterialExpressionTextureProperty'MaterialGraphNode_11.MaterialExpressionTextureProperty_0'"))
      AdditionalOutputs(0)=(OutputName="out_debug_color",OutputType=CMOT_Float3)
      ShowCode=True
      MaterialExpressionEditorX=-576
      MaterialExpressionEditorY=64
      MaterialExpressionGuid=EE1A98B74B3D84AC63EF4298EF5F9311
      Material="/Script/UnrealEd.PreviewMaterial'/Engine/Transient.M_DynamicLatticeDeform'"
      bShowOutputNameOnPin=True
      Outputs(0)=(OutputName="return")
      Outputs(1)=(OutputName="out_debug_color")
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   NodePosX=-576
   NodePosY=64
   NodeGuid=D24EF2AB4923D520C4DB1D80201C0B53
   CustomProperties Pin (PinId=537C0DF74200871F85B7019702200A22,PinName="in_lattice_id",PinType.PinCategory="required",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(MaterialGraphNode_7 A71B44654C44AB83FC9662A98E4C1D14,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=C82084184A1AFFBEACF88CAE3B47CAE8,PinName="in_lattice_uvw",PinType.PinCategory="required",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(MaterialGraphNode_4 6D1FC9BF4DD7BF70843CF99CD39EEEE4,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=06CA3F11492B4F9865F5A2BD2F6D6A10,PinName="in_lattice_reso",PinType.PinCategory="required",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(MaterialGraphNode_Knot_1 ED297F8A4F01AB7FC8C022A40D66DEB5,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=32785A6D43F60D54C376528074DA2F95,PinName="in_lattice_size",PinType.PinCategory="required",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(MaterialGraphNode_Knot_2 EFD322694656CB36E3202EB49CB50989,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
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   CustomProperties Pin (PinId=E9356CC64FAAA2B61070E49E7C2AEBF7,PinName="out_debug_color",Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/UnrealEd.MaterialGraphNode Name="MaterialGraphNode_4" ExportPath="/Script/UnrealEd.MaterialGraphNode'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_4'"
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   NodeGuid=9B5B82D14363F84DC8267385212DC71F
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   CustomProperties Pin (PinId=6D1FC9BF4DD7BF70843CF99CD39EEEE4,PinName="Output",PinFriendlyName=NSLOCTEXT("MaterialGraphNode", "Space", " "),Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(MaterialGraphNode_Custom_0 C82084184A1AFFBEACF88CAE3B47CAE8,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/UnrealEd.MaterialGraphNode Name="MaterialGraphNode_5" ExportPath="/Script/UnrealEd.MaterialGraphNode'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_5'"
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   CustomProperties Pin (PinId=C56BFBD646DA50A72447C38B9F3EB1B2,PinName="G",Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="green",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
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   CustomProperties Pin (PinId=9D5E092A47F6DF70673E019361A4B5A1,PinName="RGBA",Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="rgba",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/UnrealEd.MaterialGraphNode Name="MaterialGraphNode_6" ExportPath="/Script/UnrealEd.MaterialGraphNode'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_6'"
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   CustomProperties Pin (PinId=C251D6E745A6863BA1DD9E88F4A6D054,PinName="XYZ",Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(MaterialGraphNode_8 865F735D451CD34C1B413192D301F967,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=B13A933F432DED087219E7A52D4A9110,PinName="XY",Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=D77E7AD54927D7B0F36E2C84801DC85E,PinName="Z",Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="blue",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/UnrealEd.MaterialGraphNode Name="MaterialGraphNode_7" ExportPath="/Script/UnrealEd.MaterialGraphNode'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_7'"
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   CustomProperties Pin (PinId=A71B44654C44AB83FC9662A98E4C1D14,PinName="Output",PinFriendlyName=NSLOCTEXT("MaterialGraphNode", "Space", " "),Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(MaterialGraphNode_Custom_0 537C0DF74200871F85B7019702200A22,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/UnrealEd.MaterialGraphNode_Knot Name="MaterialGraphNode_Knot_1" ExportPath="/Script/UnrealEd.MaterialGraphNode_Knot'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_Knot_1'"
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   CustomProperties Pin (PinId=ED297F8A4F01AB7FC8C022A40D66DEB5,PinName="OutputPin",Direction="EGPD_Output",PinType.PinCategory="wildcard",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(MaterialGraphNode_Custom_0 06CA3F11492B4F9865F5A2BD2F6D6A10,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/UnrealEd.MaterialGraphNode_Knot Name="MaterialGraphNode_Knot_2" ExportPath="/Script/UnrealEd.MaterialGraphNode_Knot'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_Knot_2'"
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End Object
Begin Object Class=/Script/UnrealEd.MaterialGraphNode_Knot Name="MaterialGraphNode_Knot_3" ExportPath="/Script/UnrealEd.MaterialGraphNode_Knot'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_Knot_3'"
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   NodePosX=-1728
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   CustomProperties Pin (PinId=CFEC7B144530E3C765A061BE6625BF30,PinName="OutputPin",Direction="EGPD_Output",PinType.PinCategory="wildcard",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(MaterialGraphNode_Custom_1 00880E43402379D7A7708B90CB6AFDED,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/UnrealEd.MaterialGraphNode Name="MaterialGraphNode_8" ExportPath="/Script/UnrealEd.MaterialGraphNode'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_8'"
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   NodePosX=-1952
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   CustomProperties Pin (PinId=865F735D451CD34C1B413192D301F967,PinName="A",PinType.PinCategory="optional",PinType.PinSubCategory="red",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,DefaultValue="0.0",LinkedTo=(MaterialGraphNode_6 C251D6E745A6863BA1DD9E88F4A6D054,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=407E79E346BF01D91835DD92651128C6,PinName="B",PinType.PinCategory="optional",PinType.PinSubCategory="red",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,DefaultValue="1.0",LinkedTo=(MaterialGraphNode_Knot_5 76630B6449047067CB85C7BA29A4C738,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=979D16514042ED9A73356A9032066F70,PinName="Output",PinFriendlyName=NSLOCTEXT("MaterialGraphNode", "Space", " "),Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(MaterialGraphNode_Knot_3 250241064EEA6A54807975B23A2271DC,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/UnrealEd.MaterialGraphNode_Custom Name="MaterialGraphNode_Custom_1" ExportPath="/Script/UnrealEd.MaterialGraphNode_Custom'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_Custom_1'"
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   End Object
   Begin Object Name="MaterialExpressionCustom_3" ExportPath="/Script/Engine.MaterialExpressionCustom'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_Custom_1.MaterialExpressionCustom_3'"
      Code="const int3 lattice_vtx_count = in_lattice_reso - 1;\r\nconst float3 lattice_cell_size = in_lattice_size / lattice_vtx_count;\r\n\r\nconst float3 lattice_cell_pos =  in_local_position / lattice_cell_size;\r\n\r\nconst float3 lattice_cell_id = floor(lattice_cell_pos);\r\nout_lattice_cell_id = clamp(lattice_cell_id, 0, lattice_vtx_count-1);\r\n\r\nout_lattice_cell_uvw = saturate(lattice_cell_pos - out_lattice_cell_id);\r\n\r\nout_is_valid_lattice_cell \r\n= all(0 <= lattice_cell_id) && all((lattice_vtx_count-1) >= lattice_cell_id);\r\n\r\nreturn 1;"
      Inputs(0)=(InputName="in_local_position",Input=(Expression="/Script/Engine.MaterialExpressionReroute'MaterialGraphNode_Knot_3.MaterialExpressionReroute_4'"))
      Inputs(1)=(InputName="in_lattice_reso",Input=(Expression="/Script/Engine.MaterialExpressionVectorParameter'MaterialGraphNode_5.MaterialExpressionVectorParameter_0'",Mask=1,MaskR=1,MaskG=1,MaskB=1))
      Inputs(2)=(InputName="in_lattice_size",Input=(Expression="/Script/Engine.MaterialExpressionReroute'MaterialGraphNode_Knot_6.MaterialExpressionReroute_8'"))
      AdditionalOutputs(0)=(OutputName="out_lattice_cell_id",OutputType=CMOT_Float3)
      AdditionalOutputs(1)=(OutputName="out_lattice_cell_uvw",OutputType=CMOT_Float3)
      AdditionalOutputs(2)=(OutputName="out_is_valid_lattice_cell")
      ShowCode=True
      MaterialExpressionEditorX=-1600
      MaterialExpressionEditorY=-496
      MaterialExpressionGuid=2C07B692463739E4F338098F5BBF9D07
      Material="/Script/UnrealEd.PreviewMaterial'/Engine/Transient.M_DynamicLatticeDeform'"
      bShowOutputNameOnPin=True
      Outputs(0)=(OutputName="return")
      Outputs(1)=(OutputName="out_lattice_cell_id")
      Outputs(2)=(OutputName="out_lattice_cell_uvw")
      Outputs(3)=(OutputName="out_is_valid_lattice_cell")
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   NodePosX=-1600
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   NodeGuid=B0F607A64466FD0ACBE208895195CEE8
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   CustomProperties Pin (PinId=B3319E1C4F16177D15683DA542AF5B44,PinName="out_lattice_cell_uvw",Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(MaterialGraphNode_4 819FE751436F07FD79BEAB878B731865,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=0933F9CC4288B34990B4FD856868550E,PinName="out_is_valid_lattice_cell",Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(MaterialGraphNode_9 F97FA4AB4FE68FDE0C76B79068A959E2,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/UnrealEd.MaterialGraphNode Name="MaterialGraphNode_9" ExportPath="/Script/UnrealEd.MaterialGraphNode'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_9'"
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   bCanRenameNode=True
   NodeGuid=0297E90645D5E53F58892986DEEF2170
   CustomProperties Pin (PinId=F97FA4AB4FE68FDE0C76B79068A959E2,PinName="Input",PinFriendlyName=NSLOCTEXT("MaterialGraphNode", "Space", " "),PinType.PinCategory="required",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,LinkedTo=(MaterialGraphNode_Custom_1 0933F9CC4288B34990B4FD856868550E,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=72C30F454FDD0820FCA300BDE36AD634,PinName="Output",PinFriendlyName=NSLOCTEXT("MaterialGraphNode", "Space", " "),Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/UnrealEd.MaterialGraphNode Name="MaterialGraphNode_10" ExportPath="/Script/UnrealEd.MaterialGraphNode'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_10'"
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   CustomProperties Pin (PinId=581290474007CFD4BF95BB8E11839CAF,PinName="Apply View MipBias",PinType.PinCategory="optional",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
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   CustomProperties Pin (PinId=D79D5AEF46AC41D467FEF9A3E60936D9,PinName="Sampler Source",PinType.PinCategory="optional",PinType.PinSubCategory="byte",PinType.PinSubCategoryObject="/Script/CoreUObject.Enum'/Script/Engine.ESamplerSourceMode'",PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PinType.bSerializeAsSinglePrecisionFloat=False,DefaultValue="From texture asset",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=True,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=True,bOrphanedPin=False,)
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End Object
Begin Object Class=/Script/UnrealEd.MaterialGraphNode Name="MaterialGraphNode_11" ExportPath="/Script/UnrealEd.MaterialGraphNode'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_11'"
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   NodePosX=-1808
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      MaterialExpressionEditorY=-448
      MaterialExpressionGuid=91EAE26B4DC685CFE1FCBAAFADA19F37
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   NodePosX=896
   NodePosY=-448
   NodeGuid=24CB389746259EA32100D5BD4251841F
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Begin Object Class=/Script/UnrealEd.MaterialGraphNode_Comment Name="MaterialGraphNode_Comment_0" ExportPath="/Script/UnrealEd.MaterialGraphNode_Comment'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_Comment_0'"
   Begin Object Class=/Script/Engine.MaterialExpressionComment Name="MaterialExpressionComment_0" ExportPath="/Script/Engine.MaterialExpressionComment'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_Comment_0.MaterialExpressionComment_0'"
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      SizeX=752
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      Text="バウンディングMin位置基準のローカル頂点座標"
      CommentColor=(R=0.150000,G=0.150000,B=0.150000,A=0.500000)
      MaterialExpressionEditorX=-2432
      MaterialExpressionEditorY=-816
      MaterialExpressionGuid=0EBC033440E9F4ABF76695A0D74D7320
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   MaterialExpressionComment="/Script/Engine.MaterialExpressionComment'MaterialExpressionComment_0'"
   CommentColor=(R=0.150000,G=0.150000,B=0.150000,A=0.500000)
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   NodeComment="バウンディングMin位置基準のローカル頂点座標"
   NodeGuid=11F243C04D08D30F3502E382BE3A65CF
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Begin Object Class=/Script/UnrealEd.MaterialGraphNode_Comment Name="MaterialGraphNode_Comment_1" ExportPath="/Script/UnrealEd.MaterialGraphNode_Comment'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_Comment_1'"
   Begin Object Class=/Script/Engine.MaterialExpressionComment Name="MaterialExpressionComment_1" ExportPath="/Script/Engine.MaterialExpressionComment'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_Comment_1.MaterialExpressionComment_1'"
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      SizeX=624
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      Text="Boundingサイズぴったりの頂点がＬａｔｔｉｃｅに含まれないためBoundingのサイズを若干バイアス"
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      MaterialExpressionEditorY=-528
      MaterialExpressionGuid=0AFC249F4128B6A353DFD98BB97A1C5B
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   CommentColor=(R=0.150000,G=0.150000,B=0.150000,A=0.500000)
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   NodePosY=-528
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   bCommentBubblePinned=False
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Begin Object Class=/Script/UnrealEd.MaterialGraphNode_Comment Name="MaterialGraphNode_Comment_2" ExportPath="/Script/UnrealEd.MaterialGraphNode_Comment'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_Comment_2'"
   Begin Object Class=/Script/Engine.MaterialExpressionComment Name="MaterialExpressionComment_2" ExportPath="/Script/Engine.MaterialExpressionComment'/Engine/Transient.M_DynamicLatticeDeform:MaterialGraph_0.MaterialGraphNode_Comment_2.MaterialExpressionComment_2'"
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      CommentColor=(R=0.150000,G=0.150000,B=0.150000,A=0.500000)
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      MaterialExpressionEditorY=-64
      MaterialExpressionGuid=2C8BE47F4C25F4036AD03E9F262198ED
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   NodePosX=336
   NodePosY=-64
   NodeWidth=403
   NodeHeight=300
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   NodeComment="変位を適当にスケール"
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2026-01-28

UEマテリアルネタ帳

HLSL UE5 シェーダマテリアル数学

雑多なネタを書いてあとで探しやすくするためのページ.
役に立ったらイイネや紹介してね☆（ゝω・）vｷｬﾋﾟ

Simplex頂点に任意の乱数を利用できるSimplex Noise
入力ベクトルの主要軸と第二主要軸を抽出する

Simplex頂点に任意の乱数を利用できるSimplex Noise

nagakagachi.hatenablog.com

入力ベクトルの主要軸と第二主要軸を抽出する

ベクトルのコンポーネントについて絶対値が大きい順で第一位(Dominant), 第二位(Secondary)の軸の情報を抽出する.
軸インデックス:x=0, y=1, z=2
と
軸マスクベクトル (1, 0, 0), (0, 1, 0), (0, 0, 1)
を返す.
もっとシンプルな記述ができそうなので後でアップデートするかも.

const float3 abs_dir = abs(in_dir);

const int3 comp0 = abs_dir.xyz > abs_dir.yzx;
const int3 comp1 = abs_dir.xyz > abs_dir.zxy;
const int3 rank = comp0+comp1;

out_dominant_axis_index = 0;
out_secondary_axis_index = 0;
out_dominant_axis_mask_vec = float3(0.0, 0.0, 0.0);
out_secondary_axis_mask_vec = float3(0.0, 0.0, 0.0);
for(int i = 0; i < 3; ++i)
{
  if(2 == rank[i])
  {
    out_dominant_axis_index = i;
  }
  if(1 == rank[i])
  {
    out_secondary_axis_index = i;
  }
}
out_dominant_axis_mask_vec[out_dominant_axis_index] = 1.0;
out_secondary_axis_mask_vec[out_secondary_axis_index] = 1.0;

return out_dominant_axis_mask_vec;

ながむしメモ

Global Illumination WIP 3