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  3. FExpressionDefaultValue

FExpressionDefaultValue

Forwards to another expression, but will fallback to the 'DefaultValue' constant if the forwarded expression fails

API > API/Runtime > API/Runtime/Engine > API/Runtime/Engine/HLSLTree

Inheritance Hierarchy

References

   
Module Engine
Header /Engine/Source/Runtime/Engine/Public/HLSLTree/HLSLTreeCommon.h
Include #include "HLSLTree/HLSLTreeCommon.h"

Syntax

class FExpressionDefaultValue : public UE::HLSLTree::FExpressionForward

Remarks

Forwards to another expression, but will fallback to the 'DefaultValue' constant if the forwarded expression fails

Variables

  Type Name Description
Public variable Shader::FValue DefaultValue  

Constructors

  Type Name Description
Public function  

FExpressionDefaultValue ( const FExpression* InExpression,
const Shader::FValue& InDefaultValue
)

  

Overridden from FExpression

  Type Name Description
Public function Virtual Const void Create new expressions representing DDX/DDY of this expression
Public function Virtual Const const FExpression *

ComputePreviousFrame ( FTree& Tree,
const FRequestedType& RequestedType
)

 Creates a new expression representing this expression on the previous frame.
Public function Virtual Const void

EmitValuePreshader ( FEmitContext& Context,
FEmitScope& Scope,
const FRequestedType& RequestedType,
FEmitValuePreshaderResult& OutResult
)

 Emit Preshader code representing this expression
Public function Virtual Const bool

PrepareValue ( FEmitContext& Context,
FEmitScope& Scope,
const FRequestedType& RequestedType,
FPrepareValueResult& OutResult
)

 Computes a FPreparedType for this expression, given a FRequestedType.

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