Easing

Easing function library for Arduino.

This library is based on the Andy Brown's Easing Function Library. For animating example of easing functions, see website like this.

Tween library is more flexible and useful tweening library based on this easing library. Please check it for more practical use.

Usage

EasingFunc<Ease::Sine> e;
float start;

void setup()
{
    e.duration(duration); // default duration is 1.0
    e.scale(scale); // default scale is 1.0

    start = millis() / 1000.;
}

void loop()
{
    // value moves from 0.0 to scale in duration [sec]
    float now = millis() / 1000.;
    float value = e.get(now - start);

    Serial.println(value);
}

APIs

// get automatically in/out/inout value based on easing types
double get(const double t);

void duration(const double t);
void scale(const double s);
double duration() const;
double scale() const;

// you can also get in/out/inout values regardless of easing type
// (not recommended)
double easeIn(double t) const;
double easeOut(double t) const;
double easeInOut(double t) const;

Ease::Back family only

void overshoot(const double ovs) { v_overshoot = ovs; }
double overshoot() const { return v_overshoot; }

Ease::Elastic family only

void period(const double p) { v_period = p; }
void amplitude(const double a) { v_amplitude = a; }
double period() const { return v_period; }
double amplitude() const { return v_amplitude; }

Easing Types

• BackIn, BackOut, BackInOut
• BounceIn, BounceOut, BounceInOut
• CircIn, CircOut, CircInOut
• CubicIn, CubicOut, CubicInOut
• ElasticIn, ElasticOut, ElasticInOut
• ExpoIn, ExpoOut, ExpoInOut
• LinearIn, LinearOut, LinearInOut
• QuadIn, QuadOut, QuadInOut
• QuartIn, QuartOut, QuartInOut
• QuintIn, QuintOut, QuintInOut
• SineIn, SineOut, SineInOut

// alias
using Back = BackInOut;
using Bounce = BounceInOut;
using Circ = CircInOut;
using Cubic = CubicInOut;
using Elastic = ElasticInOut;
using Expo = ExpoInOut;
using Linear = LinearInOut;
using Quad = QuadInOut;
using Quart = QuartInOut;
using Quint = QuintInOut;
using Sine = SineInOut;

License

MIT