UKismetMathLibrary::Vector4_Set

function Engine Blueprint Since 4.0

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticUFUNCTIONBlueprintCallable

Description

Sets all four components of a Vector4 variable in-place using individual double values. Useful in Blueprint where you want to update a struct variable without constructing a new one.

Caveats & Gotchas

• Parameters are double in the C++ signature but Blueprint pins are float. Precision is silently narrowed when the node is used in Blueprint; use C++ directly if you need full double precision.
• Like Vector4_Assign, A is mutated via the UPARAM(ref) in-out pin in Blueprint — the node does not return a new vector.

Signature

static UE_INL_API void Vector4_Set(UPARAM(ref) FVector4& A, double X, double Y, double Z, double W)

Parameters

Name	Type	Description	Default
A	UPARAM(ref) FVector4&	The vector variable to modify in place.	—
X	double	New X component value.	—
Y	double	New Y component value.	—
Z	double	New Z component value.	—
W	double	New W component value.	—

Return Type

void

Example

Update an existing Vector4 with individual component values C++

FVector4 MyVec;
UKismetMathLibrary::Vector4_Set(MyVec, 3.0, 1.4, -2.0, 0.0);
// MyVec == (3.0, 1.4, -2.0, 0.0)

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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