S-Curve

A tweakable curve similar to easing functions. More...

Classes
struct	eu::core::SCurve
	Contains the parameters for an S-Curve. More...

Functions
SCurve	eu::core::s_curve_from_input (float x, float y)
	Generate an S-Curve from user input.
float	eu::core::calculate_s_curve (float x, float slope, float threshold)
	Calculates an S-Curve.

Detailed Description

A tweakable curve similar to easing functions.

Discovered by Yann van der Cruyssen/Morusque on twitter. From A Convenient Generalization of Schlick’s Bias and Gain Functions (pdf) by Jonathan T. Barron.

Function Documentation

calculate_s_curve()

float eu::core::calculate_s_curve	(	float	x,
		float	slope,
		float	threshold
	)

#include <libs/core/src/eu/core/scurve.h>

Calculates an S-Curve.

this takes floats instead of the curve since that means it could more easily be copied to glsl

Parameters

x	[0,1]
slope	>=0
threshold	[0,1]

s_curve_from_input()

SCurve eu::core::s_curve_from_input	(	float	x,
		float	y
	)

#include <libs/core/src/eu/core/scurve.h>

Generate an S-Curve from user input.

Adapted from Colugo's S curve editor implemented in/on desmos

Parameters

x	[0,1] 0=left, 1=right
y	[0,1] 0=bottom, 1=top