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  3. FMaterialXBase

FMaterialXBase

API > API/Plugins > API/Plugins/InterchangeImport > API/Plugins/InterchangeImport/MaterialX > API/Plugins/InterchangeImport/MaterialX/MaterialXUtils

Inheritance Hierarchy

References

   
Module InterchangeImport
Header /Engine/Plugins/Interchange/Runtime/Source/Import/Public/MaterialX/MaterialXUtils/MaterialXBase.h
Include #include "MaterialX/MaterialXUtils/MaterialXBase.h"

Syntax

class FMaterialXBase : public TSharedFromThis< FMaterialXBase >

Variables

  Type Name Description
Protected variable UInterchangeBaseNodeContainer & NodeContainer  
Protected variable const char * NodeDefinition It's up to the derive class to initialize it with the proper node definition

Constructors

  Type Name Description
Protected function    

Destructors

  Type Name Description
Public function Virtual    

Functions

  Type Name Description
Protected function Static void

AddTexCoordToTiledImageNodes ( MaterialX::ElementPtr Graph
)

 Add a texcoord input to the tiledimage nodes if the input is missing, and connect it to a texcoord node in the nodegraph This function should be called before the subgraphs substitution to avoid missing UVs input on a texture See for example standard_surface_brick_procedural where the tiledimage nodes have no texcoord input
Protected function Static void

ConvertNeutralNodesToDot ( MaterialX::ElementPtr NodeGraph
)

 Convert math nodes (add, sub, div, mul) that have a neutral input, to the MaterialX node which is simply the identity or a noop This allows us to optimize the final shader by avoiding unnecessary operation on a material (for example a*1 = a) This function should be called after the subgraphs substitution in order to search for all the nodes even in the subgraphs
Protected function Static MaterialX::NodePtr

CreateNode ( MaterialX::ElementPtr NodeGraph,
const char* NodeName,
const char* Category,
const TArray< FInputToCopy >& InputsToCopy,
const TArray< FInputToCreate >& InputsToCreate
)

 Helper function that create a MaterialX node, useful to insert a node between 2 nodes especially when an operation cannot be done in one pass If the node already exists in the graph, this one is returned
Protected function Static FString

GetColorSpace ( MaterialX::ElementPtr Element
)

 Return the innermost color space of an element in the current scope, if it has none, it will take the one from its parents
Protected function MaterialX::InputPtr

GetInput ( MaterialX::NodePtr Node,
const char* InputName
)

 Retrieve the input from a surfaceshader node, or take the default input from the library, this function should only be called after testing the MaterialX libraries have been successfully imported, meaning the node definition of the surfaceshader should always be valid
Protected function Static FLinearColor

GetLinearColor ( MaterialX::InputPtr Input
)

 Helper function that returns a linear color after a color space conversion, the function makes no assumption on the input, and it should have a value of Color3-4 type
Public function void

Translate ( MaterialX::NodePtr Node
)

  
Public function Static void

UpdateDocumentRecursively ( MaterialX::GraphElementPtr Graph
)

 Update a MaterialX Document recursively by either initializing nodes (like ) or updating some nodes (e.g: math nodes with neutral elements)

Typedefs

Name Description
FAttributeValue  
FAttributeValueArray  
FInputToCopy  
FInputToCreate  

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