495 lines
24 KiB
C++
495 lines
24 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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/////////////////////////////////////////////////////
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// UMaterialGraph
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#include "MaterialGraph/MaterialGraph.h"
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#include "MaterialGraph/MaterialGraphNode_Comment.h"
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#include "MaterialGraph/MaterialGraphNode.h"
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#include "MaterialGraph/MaterialGraphNode_Root.h"
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#include "Materials/MaterialExpressionComment.h"
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#include "Materials/MaterialExpressionFunctionOutput.h"
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#include "Materials/MaterialExpressionCustomOutput.h"
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#include "Materials/MaterialExpressionReroute.h"
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#include "Materials/MaterialExpressionNamedReroute.h"
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#include "MaterialGraphNode_Knot.h"
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#define LOCTEXT_NAMESPACE "MaterialGraph"
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UMaterialGraph::UMaterialGraph(const FObjectInitializer& ObjectInitializer)
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: Super(ObjectInitializer)
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{
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}
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void UMaterialGraph::RebuildGraph()
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{
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check(Material);
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Modify();
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RemoveAllNodes();
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if (!MaterialFunction)
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{
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// This needs to be done before building the new material inputs to guarantee that the shading model field is up to date
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Material->RebuildShadingModelField();
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// Initialize the material input list.
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MaterialInputs.Add(FMaterialInputInfo(FMaterialAttributeDefinitionMap::GetDisplayNameForMaterial(MP_BaseColor, Material), MP_BaseColor, LOCTEXT("BaseColorToolTip", "Defines the overall color of the Material. Each channel is automatically clamped between 0 and 1")));
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MaterialInputs.Add(FMaterialInputInfo(FMaterialAttributeDefinitionMap::GetDisplayNameForMaterial(MP_Metallic, Material), MP_Metallic, LOCTEXT("MetallicToolTip", "Controls how \"metal-like\" your surface looks like")));
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MaterialInputs.Add(FMaterialInputInfo(FMaterialAttributeDefinitionMap::GetDisplayNameForMaterial(MP_Specular, Material), MP_Specular, LOCTEXT("SpecularToolTip", "Used to scale the current amount of specularity on non-metallic surfaces and is a value between 0 and 1, default at 0.5")));
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MaterialInputs.Add(FMaterialInputInfo(FMaterialAttributeDefinitionMap::GetDisplayNameForMaterial(MP_Roughness, Material), MP_Roughness, LOCTEXT("RoughnessToolTip", "Controls how rough the Material is. Roughness of 0 (smooth) is a mirror reflection and 1 (rough) is completely matte or diffuse")));
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MaterialInputs.Add(FMaterialInputInfo(FMaterialAttributeDefinitionMap::GetDisplayNameForMaterial(MP_Anisotropy, Material), MP_Anisotropy, LOCTEXT("AnisotropyToolTip", "Determines the extent the specular highlight is stretched along the tangent. Anisotropy from 0 to 1 results in a specular highlight that stretches from uniform to maximally stretched along the tangent direction.")));
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MaterialInputs.Add(FMaterialInputInfo(FMaterialAttributeDefinitionMap::GetDisplayNameForMaterial(MP_EmissiveColor, Material), MP_EmissiveColor, LOCTEXT("EmissiveToolTip", "Controls which parts of your Material will appear to glow")));
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MaterialInputs.Add(FMaterialInputInfo(FMaterialAttributeDefinitionMap::GetDisplayNameForMaterial(MP_Opacity, Material), MP_Opacity, LOCTEXT("OpacityToolTip", "Controls the translucency of the Material")));
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MaterialInputs.Add(FMaterialInputInfo(FMaterialAttributeDefinitionMap::GetDisplayNameForMaterial(MP_OpacityMask, Material), MP_OpacityMask, LOCTEXT("OpacityMaskToolTip", "When in Masked mode, a Material is either completely visible or completely invisible")));
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MaterialInputs.Add(FMaterialInputInfo(FMaterialAttributeDefinitionMap::GetDisplayNameForMaterial(MP_Normal, Material), MP_Normal, LOCTEXT("NormalToolTip", "Takes the input of a normal map")));
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MaterialInputs.Add(FMaterialInputInfo(FMaterialAttributeDefinitionMap::GetDisplayNameForMaterial(MP_Tangent, Material), MP_Tangent, LOCTEXT("TangentToolTip", "Takes the input of a tangent map. Useful for specifying anisotropy direction.")));
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MaterialInputs.Add(FMaterialInputInfo(FMaterialAttributeDefinitionMap::GetDisplayNameForMaterial(MP_WorldPositionOffset, Material), MP_WorldPositionOffset, LOCTEXT("WorldPositionOffsetToolTip", "Allows for the vertices of a mesh to be manipulated in world space by the Material")));
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MaterialInputs.Add(FMaterialInputInfo(FMaterialAttributeDefinitionMap::GetDisplayNameForMaterial(MP_WorldDisplacement, Material), MP_WorldDisplacement, LOCTEXT("WorldDisplacementToolTip", "Allows for the tessellation vertices to be manipulated in world space by the Material")));
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MaterialInputs.Add(FMaterialInputInfo(FMaterialAttributeDefinitionMap::GetDisplayNameForMaterial(MP_TessellationMultiplier, Material), MP_TessellationMultiplier, LOCTEXT("TessllationMultiplierToolTip", "Controls the amount tessellation along the surface")));
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MaterialInputs.Add(FMaterialInputInfo(FMaterialAttributeDefinitionMap::GetDisplayNameForMaterial(MP_SubsurfaceColor, Material), MP_SubsurfaceColor, LOCTEXT("SubsurfaceToolTip", "Allows you to add a color to your Material to simulate shifts in color when light passes through the surface")));
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MaterialInputs.Add(FMaterialInputInfo(FMaterialAttributeDefinitionMap::GetDisplayNameForMaterial(MP_CustomData0, Material), MP_CustomData0, FMaterialAttributeDefinitionMap::GetDisplayNameForMaterial(MP_CustomData0, Material)));
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MaterialInputs.Add(FMaterialInputInfo(FMaterialAttributeDefinitionMap::GetDisplayNameForMaterial(MP_CustomData1, Material), MP_CustomData1, FMaterialAttributeDefinitionMap::GetDisplayNameForMaterial(MP_CustomData1, Material)));
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MaterialInputs.Add(FMaterialInputInfo(FMaterialAttributeDefinitionMap::GetDisplayNameForMaterial(MP_AmbientOcclusion, Material), MP_AmbientOcclusion, LOCTEXT("AmbientOcclusionToolTip", "Simulate the self-shadowing that happens within crevices of a surface, or of a volume for volumetric clouds only")));
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MaterialInputs.Add(FMaterialInputInfo(FMaterialAttributeDefinitionMap::GetDisplayNameForMaterial(MP_Refraction, Material), MP_Refraction, LOCTEXT("RefractionToolTip", "Takes in a texture or value that simulates the index of refraction of the surface")));
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for (int32 UVIndex = 0; UVIndex < UE_ARRAY_COUNT(Material->CustomizedUVs); UVIndex++)
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{
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//@todo - localize
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MaterialInputs.Add(FMaterialInputInfo(FText::FromString(FString::Printf(TEXT("Customized UV%u"), UVIndex)), (EMaterialProperty)(MP_CustomizedUVs0 + UVIndex), FText::FromString(FString::Printf(TEXT("CustomizedUV%uToolTip"), UVIndex))));
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}
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MaterialInputs.Add(FMaterialInputInfo(FMaterialAttributeDefinitionMap::GetDisplayNameForMaterial(MP_PixelDepthOffset, Material), MP_PixelDepthOffset, LOCTEXT("PixelDepthOffsetToolTip", "Pixel Depth Offset")));
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MaterialInputs.Add(FMaterialInputInfo(FMaterialAttributeDefinitionMap::GetDisplayNameForMaterial(MP_ShadingModel, Material), MP_ShadingModel, LOCTEXT("ShadingModelToolTip", "Selects which shading model should be used per pixel")));
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//^^^ New material properties go above here. ^^^^
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MaterialInputs.Add(FMaterialInputInfo(LOCTEXT("MaterialAttributes", "Material Attributes"), MP_MaterialAttributes, LOCTEXT("MaterialAttributesToolTip", "Material Attributes")));
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// Add Root Node
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FGraphNodeCreator<UMaterialGraphNode_Root> NodeCreator(*this);
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RootNode = NodeCreator.CreateNode();
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RootNode->Material = Material;
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NodeCreator.Finalize();
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}
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for (int32 Index = 0; Index < Material->Expressions.Num(); Index++)
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{
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AddExpression(Material->Expressions[Index], false);
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}
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for (int32 Index = 0; Index < Material->EditorComments.Num(); Index++)
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{
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AddComment(Material->EditorComments[Index]);
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}
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LinkGraphNodesFromMaterial();
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}
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UMaterialGraphNode* UMaterialGraph::AddExpression(UMaterialExpression* Expression, bool bUserInvoked)
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{
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UMaterialGraphNode* NewNode = NULL;
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if (Expression && Expression->IsA(UMaterialExpressionReroute::StaticClass()))
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{
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Modify();
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FGraphNodeCreator<UMaterialGraphNode_Knot> NodeCreator(*this);
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NewNode = NodeCreator.CreateNode(false);
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NewNode->MaterialExpression = Expression;
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NewNode->RealtimeDelegate = RealtimeDelegate;
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NewNode->MaterialDirtyDelegate = MaterialDirtyDelegate;
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Expression->GraphNode = NewNode;
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NodeCreator.Finalize();
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}
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else if (Expression)
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{
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Modify();
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FGraphNodeCreator<UMaterialGraphNode> NodeCreator(*this);
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if (bUserInvoked)
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{
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NewNode = NodeCreator.CreateUserInvokedNode();
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}
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else
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{
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NewNode = NodeCreator.CreateNode(false);
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}
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NewNode->MaterialExpression = Expression;
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NewNode->RealtimeDelegate = RealtimeDelegate;
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NewNode->MaterialDirtyDelegate = MaterialDirtyDelegate;
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Expression->GraphNode = NewNode;
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NodeCreator.Finalize();
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}
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return NewNode;
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}
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UMaterialGraphNode_Comment* UMaterialGraph::AddComment(UMaterialExpressionComment* Comment, bool bIsUserInvoked)
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{
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UMaterialGraphNode_Comment* NewComment = NULL;
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if (Comment)
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{
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Modify();
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FGraphNodeCreator<UMaterialGraphNode_Comment> NodeCreator(*this);
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if (bIsUserInvoked)
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{
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NewComment = NodeCreator.CreateUserInvokedNode(true);
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}
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else
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{
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NewComment = NodeCreator.CreateNode(false);
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}
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NewComment->MaterialExpressionComment = Comment;
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NewComment->MaterialDirtyDelegate = MaterialDirtyDelegate;
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Comment->GraphNode = NewComment;
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NodeCreator.Finalize();
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}
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return NewComment;
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}
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void UMaterialGraph::LinkGraphNodesFromMaterial()
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{
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for (int32 Index = 0; Index < Nodes.Num(); ++Index)
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{
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Nodes[Index]->BreakAllNodeLinks();
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}
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if (RootNode)
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{
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// Use Material Inputs to make GraphNode Connections
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for (int32 Index = 0; Index < MaterialInputs.Num(); ++Index)
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{
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UEdGraphPin* InputPin = RootNode->GetInputPin(Index);
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auto ExpressionInput = MaterialInputs[Index].GetExpressionInput(Material);
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if (ExpressionInput.Expression)
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{
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UMaterialGraphNode* GraphNode = CastChecked<UMaterialGraphNode>(ExpressionInput.Expression->GraphNode);
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InputPin->MakeLinkTo(GraphNode->GetOutputPin(GetValidOutputIndex(&ExpressionInput)));
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}
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}
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}
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for (int32 Index = 0; Index < Material->Expressions.Num(); Index++)
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{
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UMaterialExpression* Expression = Material->Expressions[Index];
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if (Expression)
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{
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const TArray<FExpressionInput*> ExpressionInputs = Expression->GetInputs();
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for (int32 InputIndex = 0; InputIndex < ExpressionInputs.Num(); ++InputIndex)
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{
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UEdGraphPin* InputPin = CastChecked<UMaterialGraphNode>(Expression->GraphNode)->GetInputPin(InputIndex);
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// InputPin can be null during a PostEditChange when there is a circular dependency between nodes, and nodes have pins that are dynamically created
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if (InputPin != nullptr && ExpressionInputs[InputIndex]->Expression
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// Unclear why this is null sometimes, but this is safer than crashing
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&& ExpressionInputs[InputIndex]->Expression->GraphNode)
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{
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UMaterialGraphNode* GraphNode = CastChecked<UMaterialGraphNode>(ExpressionInputs[InputIndex]->Expression->GraphNode);
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InputPin->MakeLinkTo(GraphNode->GetOutputPin(GetValidOutputIndex(ExpressionInputs[InputIndex])));
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}
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}
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}
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}
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NotifyGraphChanged();
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}
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void UMaterialGraph::LinkMaterialExpressionsFromGraph() const
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{
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// Use GraphNodes to make Material Expression Connections
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TArray<UEdGraphPin*> InputPins;
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TArray<UEdGraphPin*> OutputPins;
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for (int32 NodeIndex = 0; NodeIndex < Nodes.Num(); ++NodeIndex)
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{
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if (RootNode && RootNode == Nodes[NodeIndex])
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{
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// Setup Material's inputs from root node
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Material->Modify();
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InputPins = RootNode->Pins;
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Material->EditorX = RootNode->NodePosX;
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Material->EditorY = RootNode->NodePosY;
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check(InputPins.Num() == MaterialInputs.Num());
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for (int32 PinIndex = 0; PinIndex < InputPins.Num() && PinIndex < MaterialInputs.Num(); ++PinIndex)
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{
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FExpressionInput& MaterialInput = MaterialInputs[PinIndex].GetExpressionInput(Material);
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if (InputPins[PinIndex]->LinkedTo.Num() > 0)
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{
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UMaterialGraphNode* ConnectedNode = CastChecked<UMaterialGraphNode>(InputPins[PinIndex]->LinkedTo[0]->GetOwningNode());
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ConnectedNode->GetOutputPins(OutputPins);
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// Work out the index of the connected pin
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for (int32 OutPinIndex = 0; OutPinIndex < OutputPins.Num(); ++OutPinIndex)
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{
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if (OutputPins[OutPinIndex] == InputPins[PinIndex]->LinkedTo[0])
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{
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if (MaterialInput.OutputIndex != OutPinIndex || MaterialInput.Expression != ConnectedNode->MaterialExpression)
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{
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ConnectedNode->MaterialExpression->Modify();
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MaterialInput.Connect(OutPinIndex, ConnectedNode->MaterialExpression);
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}
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break;
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}
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}
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}
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else if (MaterialInput.Expression)
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{
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MaterialInput.Expression = NULL;
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}
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}
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}
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else
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{
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if (UMaterialGraphNode* GraphNode = Cast<UMaterialGraphNode>(Nodes[NodeIndex]))
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{
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// Need to be sure that we are changing the expression before calling modify -
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// triggers a rebuild of its preview when it is called
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UMaterialExpression* Expression = GraphNode->MaterialExpression;
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bool bModifiedExpression = false;
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if (Expression)
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{
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if (Expression->MaterialExpressionEditorX != GraphNode->NodePosX || Expression->MaterialExpressionEditorY != GraphNode->NodePosY || Expression->Desc != GraphNode->NodeComment)
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{
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bModifiedExpression = true;
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Expression->Modify();
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// Update positions and comments
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Expression->MaterialExpressionEditorX = GraphNode->NodePosX;
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Expression->MaterialExpressionEditorY = GraphNode->NodePosY;
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Expression->Desc = GraphNode->NodeComment;
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}
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GraphNode->GetInputPins(InputPins);
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const TArray<FExpressionInput*> ExpressionInputs = Expression->GetInputs();
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checkf(InputPins.Num() == ExpressionInputs.Num(), TEXT("Mismatched inputs for '%s'"), *Expression->GetFullName());
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for (int32 PinIndex = 0; PinIndex < InputPins.Num() && PinIndex < ExpressionInputs.Num(); ++PinIndex)
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{
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FExpressionInput* ExpressionInput = ExpressionInputs[PinIndex];
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if (InputPins[PinIndex]->LinkedTo.Num() > 0)
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{
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UMaterialGraphNode* ConnectedNode = CastChecked<UMaterialGraphNode>(InputPins[PinIndex]->LinkedTo[0]->GetOwningNode());
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ConnectedNode->GetOutputPins(OutputPins);
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// Work out the index of the connected pin
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for (int32 OutPinIndex = 0; OutPinIndex < OutputPins.Num(); ++OutPinIndex)
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{
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if (OutputPins[OutPinIndex] == InputPins[PinIndex]->LinkedTo[0])
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{
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if (ExpressionInput && (ExpressionInput->OutputIndex != OutPinIndex || ExpressionInput->Expression != ConnectedNode->MaterialExpression))
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{
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if (!bModifiedExpression)
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{
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bModifiedExpression = true;
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Expression->Modify();
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}
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ConnectedNode->MaterialExpression->Modify();
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ExpressionInput->Connect(OutPinIndex, ConnectedNode->MaterialExpression);
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}
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break;
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}
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}
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}
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else if (ExpressionInput && ExpressionInput->Expression)
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{
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if (!bModifiedExpression)
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{
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bModifiedExpression = true;
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Expression->Modify();
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}
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ExpressionInput->Expression = NULL;
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}
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}
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}
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}
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else if (UMaterialGraphNode_Comment* CommentNode = Cast<UMaterialGraphNode_Comment>(Nodes[NodeIndex]))
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{
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UMaterialExpressionComment* Comment = CommentNode->MaterialExpressionComment;
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if (Comment)
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{
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if (Comment->MaterialExpressionEditorX != CommentNode->NodePosX || Comment->MaterialExpressionEditorY != CommentNode->NodePosY || Comment->Text != CommentNode->NodeComment || Comment->SizeX != CommentNode->NodeWidth || Comment->SizeY != CommentNode->NodeHeight || Comment->CommentColor != CommentNode->CommentColor)
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{
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Comment->Modify();
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// Update positions and comments
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Comment->MaterialExpressionEditorX = CommentNode->NodePosX;
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Comment->MaterialExpressionEditorY = CommentNode->NodePosY;
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Comment->Text = CommentNode->NodeComment;
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Comment->SizeX = CommentNode->NodeWidth;
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Comment->SizeY = CommentNode->NodeHeight;
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Comment->CommentColor = CommentNode->CommentColor;
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}
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}
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}
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}
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}
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}
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bool UMaterialGraph::IsInputActive(UEdGraphPin* GraphPin) const
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{
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if (Material && RootNode)
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{
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for (int32 Index = 0; Index < RootNode->Pins.Num(); ++Index)
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{
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if (RootNode->Pins[Index] == GraphPin)
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{
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return Material->IsPropertyActiveInEditor(MaterialInputs[Index].GetProperty());
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}
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}
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}
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return true;
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}
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void UMaterialGraph::GetUnusedExpressions(TArray<UEdGraphNode*>& UnusedNodes) const
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{
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UnusedNodes.Empty();
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TArray<UEdGraphNode*> NodesToCheck;
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if (RootNode)
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{
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TArray<UEdGraphPin*> InputPins;
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RootNode->GetInputPins(InputPins);
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for (int32 Index = 0; Index < InputPins.Num(); ++Index)
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{
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check(Index < MaterialInputs.Num());
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if (MaterialInputs[Index].IsVisiblePin(Material) && InputPins[Index]->LinkedTo.Num() > 0 && InputPins[Index]->LinkedTo[0])
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{
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NodesToCheck.Push(InputPins[Index]->LinkedTo[0]->GetOwningNode());
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}
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}
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for (int32 Index = 0; Index < Nodes.Num(); Index++)
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{
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UMaterialGraphNode* GraphNode = Cast<UMaterialGraphNode>(Nodes[Index]);
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if (GraphNode)
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{
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UMaterialExpressionCustomOutput* CustomOutput = Cast<UMaterialExpressionCustomOutput>(GraphNode->MaterialExpression);
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if (CustomOutput)
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{
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NodesToCheck.Push(GraphNode);
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}
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}
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}
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}
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else if (MaterialFunction)
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{
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for (int32 Index = 0; Index < Nodes.Num(); Index++)
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{
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UMaterialGraphNode* GraphNode = Cast<UMaterialGraphNode>(Nodes[Index]);
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if (GraphNode)
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{
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UMaterialExpressionFunctionOutput* FunctionOutput = Cast<UMaterialExpressionFunctionOutput>(GraphNode->MaterialExpression);
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if (FunctionOutput)
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{
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NodesToCheck.Push(GraphNode);
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}
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}
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}
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}
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// Depth-first traverse the material expression graph.
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TArray<UEdGraphNode*> UsedNodes;
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TMap<UEdGraphNode*, int32> ReachableNodes;
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while (NodesToCheck.Num() > 0)
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{
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UMaterialGraphNode* GraphNode = Cast<UMaterialGraphNode>(NodesToCheck.Pop());
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if (GraphNode)
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{
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int32* AlreadyVisited = ReachableNodes.Find(GraphNode);
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if (!AlreadyVisited)
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{
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// Mark the expression as reachable.
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ReachableNodes.Add(GraphNode, 0);
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UsedNodes.Add(GraphNode);
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// Iterate over the expression's inputs and add them to the pending stack.
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TArray<UEdGraphPin*> InputPins;
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GraphNode->GetInputPins(InputPins);
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for (int32 Index = 0; Index < InputPins.Num(); ++Index)
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{
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if (InputPins[Index]->LinkedTo.Num() > 0 && InputPins[Index]->LinkedTo[0])
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{
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NodesToCheck.Push(InputPins[Index]->LinkedTo[0]->GetOwningNode());
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}
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}
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// Since named reroute nodes don't have any input pins, we manually push the declaration node here
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if (const UMaterialExpressionNamedRerouteUsage* NamedRerouteUsage = Cast<UMaterialExpressionNamedRerouteUsage>(GraphNode->MaterialExpression))
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{
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if (NamedRerouteUsage->Declaration && NamedRerouteUsage->Declaration->GraphNode)
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{
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NodesToCheck.Push(NamedRerouteUsage->Declaration->GraphNode);
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}
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}
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}
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}
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}
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for (int32 Index = 0; Index < Nodes.Num(); ++Index)
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{
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UMaterialGraphNode* GraphNode = Cast<UMaterialGraphNode>(Nodes[Index]);
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if (GraphNode && !UsedNodes.Contains(GraphNode))
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{
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UnusedNodes.Add(GraphNode);
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}
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}
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}
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void UMaterialGraph::RemoveAllNodes()
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{
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MaterialInputs.Empty();
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RootNode = NULL;
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TArray<UEdGraphNode*> NodesToRemove = Nodes;
|
|
for (int32 NodeIndex = 0; NodeIndex < NodesToRemove.Num(); ++NodeIndex)
|
|
{
|
|
NodesToRemove[NodeIndex]->Modify();
|
|
RemoveNode(NodesToRemove[NodeIndex]);
|
|
}
|
|
}
|
|
|
|
int32 UMaterialGraph::GetValidOutputIndex(FExpressionInput* Input) const
|
|
{
|
|
int32 OutputIndex = 0;
|
|
|
|
if (Input->Expression)
|
|
{
|
|
TArray<FExpressionOutput>& Outputs = Input->Expression->GetOutputs();
|
|
|
|
if (Outputs.Num() > 0)
|
|
{
|
|
const bool bOutputIndexIsValid = Outputs.IsValidIndex(Input->OutputIndex)
|
|
// Attempt to handle legacy connections before OutputIndex was used that had a mask
|
|
&& (Input->OutputIndex != 0 || Input->Mask == 0);
|
|
|
|
for (; OutputIndex < Outputs.Num(); ++OutputIndex)
|
|
{
|
|
const FExpressionOutput& Output = Outputs[OutputIndex];
|
|
|
|
if ((bOutputIndexIsValid && OutputIndex == Input->OutputIndex) || (!bOutputIndexIsValid && Output.Mask == Input->Mask && Output.MaskR == Input->MaskR && Output.MaskG == Input->MaskG && Output.MaskB == Input->MaskB && Output.MaskA == Input->MaskA))
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (OutputIndex >= Outputs.Num())
|
|
{
|
|
// Work around for non-reproducible crash where OutputIndex would be out of bounds
|
|
OutputIndex = Outputs.Num() - 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
return OutputIndex;
|
|
}
|
|
|
|
#undef LOCTEXT_NAMESPACE
|