UKismetMathLibrary::FTrunc64
#include "Kismet/KismetMathLibrary.h"
Access: public
Specifiers: staticBlueprintPureUFUNCTION
Description
Rounds A towards zero and returns an int64. The int64 version of FTrunc, safe for values that exceed int32 range.
Caveats & Gotchas
- • Tagged BlueprintAutocast — UE will silently insert this conversion on float-to-int64 Blueprint connections, which may cause unexpected truncation rather than rounding.
- • Like FTrunc, this rounds toward zero, not toward negative infinity. FTrunc64(-1.9) == -1, not -2.
Signature
static UE_INL_API int64 FTrunc64(double A);Parameters
| Name | Type | Description | Default |
|---|---|---|---|
| A | double | The floating-point value to truncate. | — |
Return Type
int64 Example
Truncate a high-precision seconds value to whole seconds C++
double PreciseTime = 86399.999;
int64 WholeSeconds = UKismetMathLibrary::FTrunc64(PreciseTime); // returns 86399Tags
Version History
Introduced in: 5.0
| Version | Status | Notes |
|---|---|---|
| 5.6 | stable | — |
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