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FEmitter

The [FEmitter](API\Runtime\Engine\FEmitter) is a helper object responsible for emitting MIR values and instructions.

API > API/Runtime > API/Runtime/Engine

The FEmitter is a helper object responsible for emitting MIR values and instructions. It is primarily used within UMaterialExpression::Build() implementations to lower the high-level semantics of a material expression into corresponding lower-level MIR nodes.

During the emission process, the emitter automatically performs various simplifications and constant folding optimizations where possible.

An instance of the emitter is created and managed by the FMaterialIRModuleBuilder. This instance is then passed to the UMaterialExpression::Build() functions so that they can emit their corresponding IR values.

IMPORTANT: Users should not assume the exact MIR::FType of the FValue* returned by EmitXXX() functions. The emitter is free to optimize operations, which may result in a returned value having a different type than naively expected (e.g., folding an operation into a constant).

The emitter handles invalid inputs gracefully. If an operation is attempted with invalid arguments (e.g., acting on arguments of unexpected types), the emitter automatically reports an error and returns the MIR::FPoison value. Furthermore, all EmitXXX() functions are robust to receiving MIR::FPoison as input; they will simply propagate the poison value without attempting the operation.

   
Name FEmitter
Type class
Header File /Engine/Source/Runtime/Engine/Public/Materials/MaterialIREmitter.h
Include Path #include "Materials/MaterialIREmitter.h"

Syntax

class FEmitter

Constructors

Name Remarks Include Path Unreal Specifiers

FEmitter()

   Materials/MaterialIREmitter.h  

Structs

Name Remarks
FPrivate  
FValueKeyFuncs  

Variables

Protected

Name Type Remarks Include Path Unreal Specifiers
bCurrentExpressionHasErrors bool Whether the current expression has reported any error. Materials/MaterialIREmitter.h  
BuilderImpl FMaterialIRModuleBuilderImpl * Pointer to the builder internal implementation. Materials/MaterialIREmitter.h  
Expression UMaterialExpression * The current expression being built (set by the builder). Materials/MaterialIREmitter.h  
FalseConstant FValue * Global "false" constant. Materials/MaterialIREmitter.h  
FMaterialIRModuleBuilder friend   Materials/MaterialIREmitter.h  
FMaterialIRModuleBuilderImpl friend   Materials/MaterialIREmitter.h  
Material UMaterial * The material being translated. Materials/MaterialIREmitter.h  
Module FMaterialIRModule * The IR module being built. Materials/MaterialIREmitter.h  
StaticParameterSet const FStaticParameterSet * The set of static parameter assignments to use during this translation. Materials/MaterialIREmitter.h  
TrueConstant FValue * Global "true" constant. Materials/MaterialIREmitter.h  
ValueSet TSet< FValue *, FValueKeyFuncs > The set of all values previously emitted. Materials/MaterialIREmitter.h  

Functions

Public

Name Remarks Include Path Unreal Specifiers

FValueRef Abs ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef ACos ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef ACosh ( FValueRef A
)

   Materials/MaterialIREmitter.h  
  Materials/MaterialIREmitter.h  

FValueRef Aggregate ( const UMaterialAggregate* InAggregate,
FValueRef InPrototype,
TConstArrayView< FAttributeAssignment > AttributeAssignments
)

 Constructs an aggregate value using the given type and prototype, initializing its attributes using the provided assignments. Materials/MaterialIREmitter.h  

FValueRef Aggregate ( const UMaterialAggregate* InAggregate,
FValueRef InPrototype,
TConstArrayView< FValueRef > AttributeValues
)

 Constructs an aggregate value using the given type and prototype, and initializes it with the provided list of attribute values. Materials/MaterialIREmitter.h  

FValueRef Aggregate ( const UMaterialAggregate* InAggregate
)

 Constructs an aggregate value using the provided aggregate definition. Materials/MaterialIREmitter.h  

FValueRef AnalyticalPartialDerivative ( FValueRef Value,
EDerivativeAxis Axis
)

 Computes and emits the analytical partial derivative of a give value. Materials/MaterialIREmitter.h  
  Materials/MaterialIREmitter.h  

FValueRef ASin ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef ASinh ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef ATan ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef Atan2 ( FValueRef A,
FValueRef B
)

   Materials/MaterialIREmitter.h  

FValueRef ATanh ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef BitShiftLeft ( FValueRef A,
FValueRef B
)

   Materials/MaterialIREmitter.h  

FValueRef BitShiftRight ( FValueRef A,
FValueRef B
)

   Materials/MaterialIREmitter.h  

FValueRef BitwiseAnd ( FValueRef A,
FValueRef B
)

   Materials/MaterialIREmitter.h  

FValueRef BitwiseNot ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef BitwiseOr ( FValueRef A,
FValueRef B
)

   Materials/MaterialIREmitter.h  

FValueRef Branch ( FValueRef Condition,
FValueRef True,
FValueRef False
)

 Emits a branch instruction. Materials/MaterialIREmitter.h  

FValueRef Call ( const FFunction* Function,
TConstArrayView< FValueRef > InputArguments
)

 Emits a call to a specified user function using specified input arguments. Materials/MaterialIREmitter.h  

FValueRef CallParameterOutput ( FValueRef Call,
uint32 ParameterIndex
)

 Emits an instruction that retrieves the output parameter value from a function call. Materials/MaterialIREmitter.h  

FValueRef Cast ( FValueRef Value,
FType TargetType
)

 Casts the given value to the specified target type. Returns poison if the cast is invalid. Materials/MaterialIREmitter.h  

FValueRef CastToBool ( FValueRef Value,
int NumColumns
)

 These functions cast the given value to the a primitive scalar or column vector type of given rows. Materials/MaterialIREmitter.h  

FValueRef CastToBoolKind ( FValueRef Value
)

   Materials/MaterialIREmitter.h  

FValueRef CastToFloat ( FValueRef Value,
int NumColumns
)

   Materials/MaterialIREmitter.h  

FValueRef CastToFloatKind ( FValueRef Value
)

   Materials/MaterialIREmitter.h  

FValueRef CastToInt ( FValueRef Value,
int NumColumns
)

   Materials/MaterialIREmitter.h  

FValueRef CastToIntKind ( FValueRef Value
)

   Materials/MaterialIREmitter.h  

FValueRef CastToScalar ( FValueRef Value
)

 Casts the given primitive value to a scalar. If this is a vector, it will convert to its first component. Materials/MaterialIREmitter.h  

FValueRef CastToScalarKind ( FValueRef Value,
EScalarKind ToScalarKind
)

 Casts the given primitive value to a given scalar kind, maintaining the same number of rows and columns. Materials/MaterialIREmitter.h  

FValueRef CastToVector ( FValueRef Value,
int32 NumColumns
)

 Casts the given primitive value to a row vector of specified columns. Materials/MaterialIREmitter.h  

FValueRef Ceil ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef CheckIsAggregate ( FValueRef Value,
const UMaterialAggregate* Aggregate
)

 Validates that the value is of an aggregate type. If not, reports error and returns poison. Materials/MaterialIREmitter.h  

FValueRef CheckIsArithmetic ( FValueRef Value
)

 Validates that the value is of an arithmetic type (int or float). Reports error and returns poison otherwise. Materials/MaterialIREmitter.h  

FValueRef CheckIsBoolean ( FValueRef Value
)

 Validates that the value is of a boolean type. If not, reports an error and returns poison. Materials/MaterialIREmitter.h  

FValueRef CheckIsInteger ( FValueRef Value
)

 Validates that the value is of a integral type. If not, reports an error and returns poison. Materials/MaterialIREmitter.h  

FValueRef CheckIsMatrix ( FValueRef Value
)

 Validates that the value is a matrix. If not, reports error and returns poison. Materials/MaterialIREmitter.h  

FValueRef CheckIsPrimitive ( FValueRef Value
)

 Validates that the value is of a primitive type. If not, reports an error and returns poison. Materials/MaterialIREmitter.h  

FValueRef CheckIsScalar ( FValueRef Value
)

 Validates that the value is a scalar. If not, reports error and returns poison. Materials/MaterialIREmitter.h  

FValueRef CheckIsScalarOrVector ( FValueRef Value
)

 Validates that the value is either a scalar or a vector. Reports error and returns poison otherwise. Materials/MaterialIREmitter.h  
Retrieves the texture value flowing into given input. Materials/MaterialIREmitter.h  

FValueRef CheckIsVector ( FValueRef Value
)

 Validates that the value is a vector. If not, reports error and returns poison. Materials/MaterialIREmitter.h  
Retrieves the value from the given input of given type kind. Materials/MaterialIREmitter.h  
  Materials/MaterialIREmitter.h  

FValueRef ConstantBool ( bool InX
)

 Returns the given constant boolean scalar. Materials/MaterialIREmitter.h  

FValueRef ConstantBool2 ( bool InX,
bool InY
)

 Emits a constant bool 2D column vector and returns it. Materials/MaterialIREmitter.h  

FValueRef ConstantBool3 ( bool InX,
bool InY,
bool InZ
)

 Emits a constant bool 3D column vector and returns it. Materials/MaterialIREmitter.h  

FValueRef ConstantBool4 ( bool InX,
bool InY,
bool InZ,
bool InW
)

 Emits a constant bool 4D column vector and returns it. Materials/MaterialIREmitter.h  

FValueRef ConstantDefault ( FType Type
)

 Emits a default value of given type (zero initialized). Materials/MaterialIREmitter.h  

FValueRef ConstantDouble ( TDouble InX
)

 Returns the given constant LWC scalar. Materials/MaterialIREmitter.h  

FValueRef ConstantFalse()

 Returns the constant boolean scalar `false_. Materials/MaterialIREmitter.h  

FValueRef ConstantFloat ( TFloat InX
)

 Returns the given constant float scalar. Materials/MaterialIREmitter.h  

FValueRef ConstantFloat2 ( UE::Math::TVector2< TFloat > InValue
)

 Emits a constant float 2D column vector and returns it. Materials/MaterialIREmitter.h  

FValueRef ConstantFloat3 ( UE::Math::TVector< TFloat > InValue
)

 Emits a constant float 3D column vector and returns it. Materials/MaterialIREmitter.h  

FValueRef ConstantFloat4 ( UE::Math::TVector4< TFloat > InValue
)

 Emits a constant float 4D column vector and returns it. Materials/MaterialIREmitter.h  

FValueRef ConstantFromShaderValue ( const UE::Shader::FValue& InValue
)

 Converts the given UE::Shader::FValue to a MIR constant value and returns it. Materials/MaterialIREmitter.h  

FValueRef ConstantInt ( TInteger InX
)

 Returns the given constant integer scalar. Materials/MaterialIREmitter.h  

FValueRef ConstantInt2 ( UE::Math::TIntVector2< TInteger > InValue
)

 Emits a constant integer 2D column vector and returns it. Materials/MaterialIREmitter.h  

FValueRef ConstantInt3 ( UE::Math::TIntVector3< TInteger > InValue
)

 Emits a constant integer 3D column vector and returns it. Materials/MaterialIREmitter.h  

FValueRef ConstantInt4 ( UE::Math::TIntVector4< TInteger > InValue
)

 Emits a constant integer 4D column vector and returns it. Materials/MaterialIREmitter.h  

FValueRef ConstantOne ( EScalarKind Kind
)

 Emits a scalar constant value of given kind with value 1 and returns it. Materials/MaterialIREmitter.h  

FValueRef ConstantScalar ( EScalarKind Kind,
TDouble Value
)

 Casts the given float value to the given scalar kind and returns its value. Materials/MaterialIREmitter.h  

FValueRef ConstantTrue()

 Returns the constant boolean scalar `true_. Materials/MaterialIREmitter.h  

FValueRef ConstantZero ( EScalarKind Kind
)

 Emits a scalar constant value of given kind with value 0 and returns it. Materials/MaterialIREmitter.h  

FValueRef Cos ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef Cosh ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef Cross ( FValueRef A,
FValueRef B
)

   Materials/MaterialIREmitter.h  
Returns whether the current expression generated an error. Materials/MaterialIREmitter.h  

FValueRef CustomPrimitiveData ( uint32 PrimitiveDataIndex
)

 Emits a custom primitive data value with given index. Materials/MaterialIREmitter.h  

FValueRef DBufferTexture ( EDBufferTextureId DBufferId
)

 Emit a screen texture with the given DBuffer Texture id. Materials/MaterialIREmitter.h  

FValueRef Divide ( FValueRef A,
FValueRef B
)

   Materials/MaterialIREmitter.h  
  Materials/MaterialIREmitter.h  

FValueRef Equals ( FValueRef A,
FValueRef B
)

   Materials/MaterialIREmitter.h  

void Error ( FStringView Message
)

 Reports an error with given error message. Materials/MaterialIREmitter.h  

void Error ( FValueRef Source,
FStringView Message
)

 Reports an error with given error message. Materials/MaterialIREmitter.h  

void Errorf ( UE::Core::TCheckedFormatString< FString::FmtCharType, TArgs... > Format,
TArgs... Args
)

 Reports an error using printf-like format and arguments to format the error message. Materials/MaterialIREmitter.h  

void Errorf ( FValueRef Source,
UE::Core::TCheckedFormatString< FString::FmtCharType, TArgs... > Format,
TArgs... Args
)

 Reports an error using printf-like format and arguments to format the error message. Materials/MaterialIREmitter.h  

FValueRef Exponential ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef Exponential2 ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef ExternalInput ( EExternalInput Id,
uint32 UserData
)

 Emits an external input value of given input Id and returns it. Materials/MaterialIREmitter.h  

FValueRef Floor ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef Fmod ( FValueRef A,
FValueRef B
)

   Materials/MaterialIREmitter.h  

FValueRef Frac ( FValueRef A
)

   Materials/MaterialIREmitter.h  

const FFunction * FunctionHLSL ( const FFunctionHLSLDesc& Desc
)

 Defines a user-specified HLSL function to embed in the generated HLSL when generated IR Module is translated to HLSL. Materials/MaterialIREmitter.h  
Gets the common type between A and B and reports an error if no such type exists. Materials/MaterialIREmitter.h  

FType GetCommonType ( TConstArrayView< FValueRef > Values
)

 Gets the common type between the specified values types. Materials/MaterialIREmitter.h  

ERHIFeatureLevel::Type GetFeatureLevel()

   Materials/MaterialIREmitter.h  

FType GetMaterialAggregateAttributeType ( const UMaterialAggregate* Aggregate,
int32 AttributeIndex
)

 Returns the type of the i-th attribute in the given material aggregate. Materials/MaterialIREmitter.h  

EMaterialQualityLevel::Type GetQualityLevel()

   Materials/MaterialIREmitter.h  

EShaderPlatform GetShaderPlatform()

   Materials/MaterialIREmitter.h  

const ITargetPlatform * GetTargetPlatform()

   Materials/MaterialIREmitter.h  

UObject * GetTextureFromValue ( MIR::FValueRef Texture
)

 Returns the UTexture or URuntimeVirtualTexture of the specified texture object or uniform parameter. Materials/MaterialIREmitter.h  

FValueRef GreaterThan ( FValueRef A,
FValueRef B
)

   Materials/MaterialIREmitter.h  

FValueRef GreaterThanOrEquals ( FValueRef A,
FValueRef B
)

   Materials/MaterialIREmitter.h  

FValueRef InlineHLSL ( FType Type,
FStringView Code,
TConstArrayView< FValueRef > InputValues,
EValueFlags ValueFlags,
EGraphProperties UsedGraphProperties
)

 Emit a new HLSL function inline within the material shader. Materials/MaterialIREmitter.h  

FValueRef InlineHLSL ( const FMaterialExternalCodeDeclaration* InExternalCodeDeclaration,
TConstArrayView< FValueRef > InputValues,
EValueFlags ValueFlags,
EGraphProperties UsedGraphProperties
)

 Emit a new HLSL function inline within the material shader based on an external code declaration. Materials/MaterialIREmitter.h  

FValueRef Input ( const FExpressionInput* Input
)

 Retrieves the value flowing into given input. Materials/MaterialIREmitter.h  

FValueRef InputDefaultBool ( const FExpressionInput* Input,
bool Default
)

 If the input has no value flowing in (e.g., because the input is disconnected), these DefaultXXX() functions will emit a constant value, bind it to the input, and return it. Materials/MaterialIREmitter.h  

FValueRef InputDefaultFloat ( const FExpressionInput* Input,
TFloat Default
)

   Materials/MaterialIREmitter.h  

FValueRef InputDefaultFloat2 ( const FExpressionInput* Input,
UE::Math::TVector2< TFloat > Default
)

   Materials/MaterialIREmitter.h  

FValueRef InputDefaultFloat3 ( const FExpressionInput* Input,
UE::Math::TVector< TFloat > Default
)

   Materials/MaterialIREmitter.h  

FValueRef InputDefaultFloat4 ( const FExpressionInput* Input,
UE::Math::TVector4< TFloat > Default
)

   Materials/MaterialIREmitter.h  

FValueRef InputDefaultInt ( const FExpressionInput* Input,
TInteger Default
)

   Materials/MaterialIREmitter.h  

FValueRef InputDefaultInt2 ( const FExpressionInput* Input,
UE::Math::TIntVector2< TInteger > Default
)

   Materials/MaterialIREmitter.h  

FValueRef InputDefaultInt3 ( const FExpressionInput* Input,
UE::Math::TIntVector3< TInteger > Default
)

   Materials/MaterialIREmitter.h  

FValueRef InputDefaultInt4 ( const FExpressionInput* Input,
UE::Math::TIntVector4< TInteger > Default
)

   Materials/MaterialIREmitter.h  

FValueRef Length ( FValueRef A
)

   Materials/MaterialIREmitter.h  
  Materials/MaterialIREmitter.h  

FValueRef LessThan ( FValueRef A,
FValueRef B
)

   Materials/MaterialIREmitter.h  

FValueRef LessThanOrEquals ( FValueRef A,
FValueRef B
)

   Materials/MaterialIREmitter.h  

FValueRef Logarithm ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef Logarithm10 ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef Logarithm2 ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef LWCTile ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef MaterialParameterCollection ( UMaterialParameterCollection* Collection
)

 Emits a material parameter collection. Materials/MaterialIREmitter.h  

FValueRef MatrixMultiply ( FValueRef A,
FValueRef B
)

   Materials/MaterialIREmitter.h  
  Materials/MaterialIREmitter.h  
  Materials/MaterialIREmitter.h  

FValueRef Modulo ( FValueRef A,
FValueRef B
)

   Materials/MaterialIREmitter.h  

FValueRef Multiply ( FValueRef A,
FValueRef B
)

   Materials/MaterialIREmitter.h  

FValueRef Negate ( FValueRef A
)

   Materials/MaterialIREmitter.h  
Emits a NOP instruction that behaves as a default value of Arg type, but will still cause Arg to be analyzed. Materials/MaterialIREmitter.h  

FValueRef Not ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef NotEquals ( FValueRef A,
FValueRef B
)

   Materials/MaterialIREmitter.h  
Emits a mathematical operation instruction with given operator and arguments. Materials/MaterialIREmitter.h  
  Materials/MaterialIREmitter.h  

FEmitter & Output ( const FExpressionOutput* ExpressionOutput,
FValueRef Value
)

 Flows given Value_ out of given expression ExpressionOutput_. Materials/MaterialIREmitter.h  

FEmitter & Output ( int32 OutputIndex,
FValueRef Value
)

 Flows given Value_ out of the expression output with given OutputIndex_. Materials/MaterialIREmitter.h  

FEmitter & Outputs ( const TConstArrayView< FExpressionOutput >& ExpressionOutputs,
FValueRef Value
)

 Flows given `Value_ out of given expression output list. Each output applies its respective mask. Materials/MaterialIREmitter.h  

FValueRef Parameter ( FName Name,
FMaterialParameterMetadata& Metadata,
EMaterialSamplerType SamplerType,
int32 VTLayerIndex,
int32 VTPageTableIndex
)

 Emits a material parameter value with given name, metadata, sampler type (if it's a texture) and optional parameters for RVT layer index and page table index. Materials/MaterialIREmitter.h  
Emits the partial derivative of given value. Materials/MaterialIREmitter.h  

FValueRef Poison()

 Emits the poison value. Materials/MaterialIREmitter.h  
  Materials/MaterialIREmitter.h  

FValueRef PreshaderParameter ( FType Type,
UE::Shader::EPreshaderOpcode Opcode,
FValueRef SourceParameter,
FPreshaderParameterPayload Payload
)

 Emits a preshader parameter value with given opcode. Materials/MaterialIREmitter.h  

FValueRef PromoteSubstrateParameter()

 Emits an instruction that promotes a Substrate parameter, encoded as MCT_Substrate. Materials/MaterialIREmitter.h  

FValueRef Reciprocal ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef Round ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef Rsqrt ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef RuntimeVirtualTextureObject ( URuntimeVirtualTexture* RVTexture,
EMaterialSamplerType SamplerType,
int32 VTLayerIndex,
int32 VTPageTableIndex
)

 Emits a runtime virtual texture object value. Materials/MaterialIREmitter.h  

FValueRef Saturate ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef SceneTexture ( ESceneTextureId SceneTextureId
)

 Emit a screen texture with the given Scene Texture id. Materials/MaterialIREmitter.h  

FValueRef ScreenTexture ( EScreenTexture TextureKind
)

 Emit another type of screen texture (not one of the three types above). Materials/MaterialIREmitter.h  

FValueRef Select ( FValueRef A,
FValueRef B,
FValueRef C
)

   Materials/MaterialIREmitter.h  
Emits an instruction that sets the material attribute with given property to given argument. Materials/MaterialIREmitter.h  

FValueRef ShadingModel ( EMaterialShadingModel Id
)

 Emits a shading model. Materials/MaterialIREmitter.h  

FValueRef Sign ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef Sin ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef Sinh ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef Smoothstep ( FValueRef A,
FValueRef B,
FValueRef C
)

   Materials/MaterialIREmitter.h  

FValueRef Sqrt ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef StageSwitch ( FType Type,
TConstArrayView< FValueRef > ValuePerStage
)

 Emits a stage switch instruction. Materials/MaterialIREmitter.h  

FValueRef Step ( FValueRef A,
FValueRef B
)

   Materials/MaterialIREmitter.h  

FValueRef Subscript ( FValueRef Value,
int32 Index
)

 Extracts the component with given index from the given argument value. Materials/MaterialIREmitter.h  

FValueRef Subtract ( FValueRef A,
FValueRef B
)

   Materials/MaterialIREmitter.h  
Swizzles the given argument by given mask. Materials/MaterialIREmitter.h  

FValueRef Tan ( FValueRef A
)

   Materials/MaterialIREmitter.h  

FValueRef TextureGather ( FValueRef Texture,
FValueRef TexCoord,
ETextureReadMode GatherMode,
const FTextureSampleBaseAttributes& BaseAttributes
)

 Emits a texture gather instruction. Materials/MaterialIREmitter.h  

FValueRef TextureObject ( UTexture* Texture,
EMaterialSamplerType SamplerType
)

 Emits a texture object value of fiven sampler type and returns it. Materials/MaterialIREmitter.h  

FValueRef TextureSample ( FValueRef Texture,
FValueRef TexCoord,
bool bAddViewMaterialMipBias,
const FTextureSampleBaseAttributes& BaseAttributes
)

 Emits a texture sample instruction. Materials/MaterialIREmitter.h  

FValueRef TextureSampleBias ( FValueRef Texture,
FValueRef TexCoord,
FValueRef MipBias,
bool bAddViewMaterialMipBias,
const FTextureSampleBaseAttributes& BaseAttributes
)

 Emits a texture sample instruction with bias added to the automatically selected mip level. Materials/MaterialIREmitter.h  

FValueRef TextureSampleGrad ( FValueRef Texture,
FValueRef TexCoord,
FValueRef TexCoordDdx,
FValueRef TexCoordDdy,
bool bAddViewMaterialMipBias,
const FTextureSampleBaseAttributes& BaseAttributes
)

 Emits a texture sample instruction using user provided partial derivatives. Materials/MaterialIREmitter.h  

FValueRef TextureSampleLevel ( FValueRef Texture,
FValueRef TexCoord,
FValueRef MipLevel,
bool bAddViewMaterialMipBias,
const FTextureSampleBaseAttributes& BaseAttributes
)

 Emits a texture sample instruction with a manually given mip level. Materials/MaterialIREmitter.h  

bool ToConstantBool ( FValueRef Value
)

 Casts the value flowing into this input to a constant boolean and returns it. Materials/MaterialIREmitter.h  
Transposes the given MxN primitive value into the NxM result. Materials/MaterialIREmitter.h  

FValueRef Truncate ( FValueRef A
)

   Materials/MaterialIREmitter.h  
Tries to find a common type between A and B. Materials/MaterialIREmitter.h  
Retrieves the value from the given input, if present. Materials/MaterialIREmitter.h  

FValueRef UserSceneTexture ( FName UserSceneTexture
)

 Emit a screen texture with the given User Scene Texture name. Materials/MaterialIREmitter.h  

FValueRef Vector2 ( FValueRef InX,
FValueRef InY
)

 Emits a 2D column vector from X and Y values. Materials/MaterialIREmitter.h  
Emits a 3D vector from a 2D vector (XY) and a Z value. Materials/MaterialIREmitter.h  
Emits a 3D vector from separate X, Y, and Z values. Materials/MaterialIREmitter.h  
Emits a 4D vector from a 2D vector (XY), a Z value, and a W value. Materials/MaterialIREmitter.h  
Emits a 4D vector from a 3D vector (XYZ) and a W value. Materials/MaterialIREmitter.h  
Emits a 4D vector from separate X, Y, Z, and W values. Materials/MaterialIREmitter.h  

FValueRef VTPageTableLoad ( FValueRef Texture,
TextureAddress AddressU,
TextureAddress AddressV,
FValueRef TexCoord,
FValueRef TexCoordDdx,
FValueRef TexCoordDdy,
bool bEnableFeedback,
bool bIsAdaptive,
ETextureMipValueMode MipValueMode,
FValueRef MipValue
)

 Emits the virtual texture page load instruction. Materials/MaterialIREmitter.h  

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