UBlueprintSpringMathLibrary::ConvertSmoothingTimeToStrength

function Engine Blueprint Since 5.7

#include "Kismet/BlueprintSpringMathLibrary.h"

Access: public Specifiers: staticBlueprintPure

Description

Converts a spring's smoothing time into its equivalent strength, which corresponds to the spring's undamped frequency in Hz. Use this when a downstream API or custom spring implementation expects a strength/frequency parameter instead of a smoothing time.

Caveats & Gotchas

• Not itself marked UE_EXPERIMENTAL, but it lives on an Experimental UCLASS (UBlueprintSpringMathLibrary) and only makes sense alongside the other spring/damping functions, which are experimental.
• Strength and smoothing time are inversely related — a SmoothingTime of 0 corresponds to effectively infinite strength (an instant snap), so guard against passing 0 if you plan to divide by the resulting strength.

Signature

static float ConvertSmoothingTimeToStrength(float SmoothingTime);

Parameters

Name	Type	Description	Default
SmoothingTime	float	The smoothing time of the spring in seconds — the time by which the output lags the input when critically damped and the input changes at a constant rate.	—

Return Type

float

Example

Convert a smoothing time to spring strength C++

float Strength = UBlueprintSpringMathLibrary::ConvertSmoothingTimeToStrength(0.2f);
// Strength now holds the equivalent undamped frequency in Hz

Version History

Introduced in: 5.7

Version	Status	Notes
5.7	experimental	SpringMath is experimental.

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