UKismetMathLibrary::GetPI
#include "Kismet/KismetMathLibrary.h"
Access: public
Specifiers: staticUFUNCTIONBlueprintPure
Description
Returns the mathematical constant π (~3.14159). Primarily useful in Blueprint; in C++ prefer the UE_PI macro or PI directly.
Caveats & Gotchas
- • In C++ code UE_PI (or the standard M_PI where available) is zero-cost at compile time; using this function in tight C++ loops adds unnecessary function call overhead.
- • The return type is double — if you assign to a float, the value is narrowed to float precision (~7 significant digits), which is sufficient for most gameplay math but can accumulate error in long-running simulations.
Signature
static UE_INL_API double GetPI();Return Type
double Example
Compute circumference from radius in Blueprint-called C++ C++
double Radius = 100.0;
double Circumference = 2.0 * UKismetMathLibrary::GetPI() * Radius;Tags
Version History
Introduced in: 4.0
| Version | Status | Notes |
|---|---|---|
| 5.6 | stable | — |
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