FFoo | Unreal Engine 5.7 Documentation | Epic Developer Community

Simple custom attribute type for splines Demonstrates the requirements for a custom attribute type

Custom types need to provide certain operations for use with splines:

Basic arithmetic: operator-(const T&), operator+(const T&), operator*(float)

Optional helper methods that improve performance: Size(), SizeSquared(), Dot(), etc.

If your type doesn't provide some of these methods, spline operations will still work using fallback implementations, but may be less efficient.


Name	FFoo
Type	struct
Header File	/Engine/Source/Runtime/GeometryCore/Public/Splines/CustomAttributeExample.h
Include Path	#include "Splines/CustomAttributeExample.h"

Syntax

struct FFoo

Name	Remarks	Include Path	Unreal Specifiers
FFoo ()	Constructor.	Splines/CustomAttributeExample.h
FFoo ( float InValue )	Constructor with value.	Splines/CustomAttributeExample.h

Name	Type	Remarks	Include Path	Unreal Specifiers
Value	float	A simple float value attribute.	Splines/CustomAttributeExample.h

Name	Remarks	Include Path
float Dot ( const FFoo& Other ) const	Dot product with another FFoo (required for some operations)	Splines/CustomAttributeExample.h
FFoo GetSafeNormal()	Get a normalized version (for when direction matters)	Splines/CustomAttributeExample.h
bool Serialize ( FArchive& Ar )	Serialization support.	Splines/CustomAttributeExample.h
float Size()	Size method that returns the "magnitude" of this type For a float-based type, we'll use absolute value	Splines/CustomAttributeExample.h
float SizeSquared()	Square size (optimization to avoid square root)	Splines/CustomAttributeExample.h

Name	Remarks	Include Path
FFoo operator- ( const FFoo& Other ) const	Add operator- for parameterization.	Splines/CustomAttributeExample.h
FFoo operator* ( float Scale ) const		Splines/CustomAttributeExample.h
FFoo operator+ ( const FFoo& Other ) const	Add operator+ for parameterization.	Splines/CustomAttributeExample.h
bool operator== ( const FFoo& Other ) const		Splines/CustomAttributeExample.h