TTransformSRT3 | Unreal Engine 5.7 Documentation

API > API/Runtime > API/Runtime/GeometryCore

TTransformSRT3 is a variant of the standard UE FTransform/TTransform that uses the UE::Geometry::TQuaternion instead of the UE::Math::TQuat.

Transform order is Scale, then Rotate, then Translate. So mathematically (T * R * S) * v , assuming traditional matrix-vector multiplication order (note that the UE::Math library uses the opposite vector*Matrix ordering for TMatrix!)

Implicit constructors/casts are defined to/from FTransform3d and FTransform3f. This will likely be revised in future so that conversions that lose precision are explicit.


Name	TTransformSRT3
Type	class
Header File	/Engine/Source/Runtime/GeometryCore/Public/TransformTypes.h
Include Path	#include "TransformTypes.h"

Syntax

template<typename RealType>  
class TTransformSRT3

Constructors

Name	Remarks	Include Path	Unreal Specifiers
TTransformSRT3 ()		TransformTypes.h
TTransformSRT3 ( const UE::Math::TVector< RealType >& TranslationIn )		TransformTypes.h
TTransformSRT3 ( const FTransform3f& Transform )		TransformTypes.h
TTransformSRT3 ( const FTransform3d& Transform )		TransformTypes.h
TTransformSRT3 ( const TQuaternion< RealType >& RotationIn, const UE::Math::TVector< RealType >& TranslationIn )		TransformTypes.h
TTransformSRT3 ( const TQuaternion< RealType >& RotationIn, const UE::Math::TVector< RealType >& TranslationIn, const UE::Math::TVector< RealType >& ScaleIn )		TransformTypes.h

Functions

Public

Name	Remarks	Include Path
bool CanRepresentInverse ( RealType Tolerance ) const	Reports wheth the inverse is representable with a single TTransformSRT3.	TransformTypes.h
void ClampMinimumScale ( RealType MinimumScale )	Clamp all scale components to a minimum value.	TransformTypes.h
RealType GetDeterminant()		TransformTypes.h
const TQuaternion< RealType > & GetRotation()		TransformTypes.h
FRotator GetRotator()		TransformTypes.h
const TVector< RealType > & GetScale()		TransformTypes.h
const TVector< RealType > & GetScale3D()		TransformTypes.h
const TVector< RealType > & GetTranslation()		TransformTypes.h
bool HasNonUniformScale ( RealType Tolerance ) const		TransformTypes.h
TVector< RealType2 > InverseTransformNormal ( const UE::Math::TVector< RealType2 >& Normal ) const	Surface Normals are special, their inverse transform is InverseRotate( Normalize(Scale * Normal) ) )	TransformTypes.h
TVector< RealType2 > InverseTransformPosition ( const UE::Math::TVector< RealType2 >& P ) const		TransformTypes.h
UE::Math::TRay< RealType > InverseTransformRay ( const UE::Math::TRay< RealType >& Ray ) const		TransformTypes.h
TVector< RealType2 > InverseTransformVector ( const UE::Math::TVector< RealType2 >& V ) const		TransformTypes.h
TVector< RealType2 > InverseTransformVectorNoScale ( const UE::Math::TVector< RealType2 >& V ) const		TransformTypes.h
TTransformSRT3< RealType > InverseUnsafe ( RealType Tolerance ) const	Attempts to return an inverse, but will give an incorrect result if the transform has both non-uniform scaling and rotation, because TTransformSRT3 cannot represent the true inverse in that case.	TransformTypes.h
void SetRotation ( const TQuaternion< RealType >& RotationIn )	Set Rotation portion of Transform	TransformTypes.h
void SetScale ( const UE::Math::TVector< RealType >& ScaleIn )	Set Scale portion of transform	TransformTypes.h
void SetTranslation ( const UE::Math::TVector< RealType >& TranslationIn )	Set Translation portion of transform	TransformTypes.h
TVector< RealType2 > TransformNormal ( const UE::Math::TVector< RealType2 >& Normal ) const	Surface Normals are special, their transform is Rotate( Normalize( (1/Scale) * Normal) ) ). However 1/Scale requires special handling in case any component is near-zero.	TransformTypes.h
TVector< RealType2 > TransformPosition ( const TVector< RealType2 >& P ) const	The following templates perform vector-type-conversion variants.	TransformTypes.h
UE::Math::TRay< RealType > TransformRay ( const UE::Math::TRay< RealType >& Ray ) const		TransformTypes.h
TVector< RealType2 > TransformVector ( const UE::Math::TVector< RealType2 >& V ) const		TransformTypes.h
TVector< RealType2 > TransformVectorNoScale ( const UE::Math::TVector< RealType2 >& V ) const		TransformTypes.h

Static

Name	Remarks	Include Path	Unreal Specifiers
static TVector< RealType > GetSafeScaleReciprocal ( const TVector< RealType >& InScale, RealType Tolerance )		TransformTypes.h
static TTransformSRT3< RealType > Identity()		TransformTypes.h

Operators

Name	Remarks	Include Path	Unreal Specifiers
operator FTransform3d()		TransformTypes.h
operator FTransform3f()		TransformTypes.h