Easing.java
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package com.github.mikephil.charting.animation;
import android.animation.TimeInterpolator;
import android.support.annotation.RequiresApi;
/**
* Easing options.
*
* @author Daniel Cohen Gindi
* @author Mick Ashton
*/
@SuppressWarnings("WeakerAccess")
@RequiresApi(11)
public class Easing {
public interface EasingFunction extends TimeInterpolator {
@Override
float getInterpolation(float input);
}
/**
* Enum holding EasingOption constants
*
* @deprecated Use Easing.Linear instead of Easing.EasingOption.Linear
*/
@Deprecated
public enum EasingOption {
Linear,
EaseInQuad,
EaseOutQuad,
EaseInOutQuad,
EaseInCubic,
EaseOutCubic,
EaseInOutCubic,
EaseInQuart,
EaseOutQuart,
EaseInOutQuart,
EaseInSine,
EaseOutSine,
EaseInOutSine,
EaseInExpo,
EaseOutExpo,
EaseInOutExpo,
EaseInCirc,
EaseOutCirc,
EaseInOutCirc,
EaseInElastic,
EaseOutElastic,
EaseInOutElastic,
EaseInBack,
EaseOutBack,
EaseInOutBack,
EaseInBounce,
EaseOutBounce,
EaseInOutBounce,
}
/**
* Returns the EasingFunction of the given EasingOption
*
* @param easing EasingOption to get
* @return EasingFunction
*/
@SuppressWarnings("deprecation")
@Deprecated
public static EasingFunction getEasingFunctionFromOption(EasingOption easing) {
switch (easing) {
default:
case Linear:
return Easing.Linear;
case EaseInQuad:
return Easing.EaseInQuad;
case EaseOutQuad:
return Easing.EaseOutQuad;
case EaseInOutQuad:
return Easing.EaseInOutQuad;
case EaseInCubic:
return Easing.EaseInCubic;
case EaseOutCubic:
return Easing.EaseOutCubic;
case EaseInOutCubic:
return Easing.EaseInOutCubic;
case EaseInQuart:
return Easing.EaseInQuart;
case EaseOutQuart:
return Easing.EaseOutQuart;
case EaseInOutQuart:
return Easing.EaseInOutQuart;
case EaseInSine:
return Easing.EaseInSine;
case EaseOutSine:
return Easing.EaseOutSine;
case EaseInOutSine:
return Easing.EaseInOutSine;
case EaseInExpo:
return Easing.EaseInExpo;
case EaseOutExpo:
return Easing.EaseOutExpo;
case EaseInOutExpo:
return Easing.EaseInOutExpo;
case EaseInCirc:
return Easing.EaseInCirc;
case EaseOutCirc:
return Easing.EaseOutCirc;
case EaseInOutCirc:
return Easing.EaseInOutCirc;
case EaseInElastic:
return Easing.EaseInElastic;
case EaseOutElastic:
return Easing.EaseOutElastic;
case EaseInOutElastic:
return Easing.EaseInOutElastic;
case EaseInBack:
return Easing.EaseInBack;
case EaseOutBack:
return Easing.EaseOutBack;
case EaseInOutBack:
return Easing.EaseInOutBack;
case EaseInBounce:
return Easing.EaseInBounce;
case EaseOutBounce:
return Easing.EaseOutBounce;
case EaseInOutBounce:
return Easing.EaseInOutBounce;
}
}
private static final float DOUBLE_PI = 2f * (float) Math.PI;
@SuppressWarnings("unused")
public static final EasingFunction Linear = new EasingFunction() {
public float getInterpolation(float input) {
return input;
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseInQuad = new EasingFunction() {
public float getInterpolation(float input) {
return input * input;
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseOutQuad = new EasingFunction() {
public float getInterpolation(float input) {
return -input * (input - 2f);
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseInOutQuad = new EasingFunction() {
public float getInterpolation(float input) {
input *= 2f;
if (input < 1f) {
return 0.5f * input * input;
}
return -0.5f * ((--input) * (input - 2f) - 1f);
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseInCubic = new EasingFunction() {
public float getInterpolation(float input) {
return (float) Math.pow(input, 3);
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseOutCubic = new EasingFunction() {
public float getInterpolation(float input) {
input--;
return (float) Math.pow(input, 3) + 1f;
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseInOutCubic = new EasingFunction() {
public float getInterpolation(float input) {
input *= 2f;
if (input < 1f) {
return 0.5f * (float) Math.pow(input, 3);
}
input -= 2f;
return 0.5f * ((float) Math.pow(input, 3) + 2f);
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseInQuart = new EasingFunction() {
public float getInterpolation(float input) {
return (float) Math.pow(input, 4);
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseOutQuart = new EasingFunction() {
public float getInterpolation(float input) {
input--;
return -((float) Math.pow(input, 4) - 1f);
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseInOutQuart = new EasingFunction() {
public float getInterpolation(float input) {
input *= 2f;
if (input < 1f) {
return 0.5f * (float) Math.pow(input, 4);
}
input -= 2f;
return -0.5f * ((float) Math.pow(input, 4) - 2f);
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseInSine = new EasingFunction() {
public float getInterpolation(float input) {
return -(float) Math.cos(input * (Math.PI / 2f)) + 1f;
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseOutSine = new EasingFunction() {
public float getInterpolation(float input) {
return (float) Math.sin(input * (Math.PI / 2f));
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseInOutSine = new EasingFunction() {
public float getInterpolation(float input) {
return -0.5f * ((float) Math.cos(Math.PI * input) - 1f);
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseInExpo = new EasingFunction() {
public float getInterpolation(float input) {
return (input == 0) ? 0f : (float) Math.pow(2f, 10f * (input - 1f));
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseOutExpo = new EasingFunction() {
public float getInterpolation(float input) {
return (input == 1f) ? 1f : (-(float) Math.pow(2f, -10f * (input + 1f)));
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseInOutExpo = new EasingFunction() {
public float getInterpolation(float input) {
if (input == 0) {
return 0f;
} else if (input == 1f) {
return 1f;
}
input *= 2f;
if (input < 1f) {
return 0.5f * (float) Math.pow(2f, 10f * (input - 1f));
}
return 0.5f * (-(float) Math.pow(2f, -10f * --input) + 2f);
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseInCirc = new EasingFunction() {
public float getInterpolation(float input) {
return -((float) Math.sqrt(1f - input * input) - 1f);
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseOutCirc = new EasingFunction() {
public float getInterpolation(float input) {
input--;
return (float) Math.sqrt(1f - input * input);
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseInOutCirc = new EasingFunction() {
public float getInterpolation(float input) {
input *= 2f;
if (input < 1f) {
return -0.5f * ((float) Math.sqrt(1f - input * input) - 1f);
}
return 0.5f * ((float) Math.sqrt(1f - (input -= 2f) * input) + 1f);
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseInElastic = new EasingFunction() {
public float getInterpolation(float input) {
if (input == 0) {
return 0f;
} else if (input == 1) {
return 1f;
}
float p = 0.3f;
float s = p / DOUBLE_PI * (float) Math.asin(1f);
return -((float) Math.pow(2f, 10f * (input -= 1f))
*(float) Math.sin((input - s) * DOUBLE_PI / p));
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseOutElastic = new EasingFunction() {
public float getInterpolation(float input) {
if (input == 0) {
return 0f;
} else if (input == 1) {
return 1f;
}
float p = 0.3f;
float s = p / DOUBLE_PI * (float) Math.asin(1f);
return 1f
+ (float) Math.pow(2f, -10f * input)
* (float) Math.sin((input - s) * DOUBLE_PI / p);
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseInOutElastic = new EasingFunction() {
public float getInterpolation(float input) {
if (input == 0) {
return 0f;
}
input *= 2f;
if (input == 2) {
return 1f;
}
float p = 1f / 0.45f;
float s = 0.45f / DOUBLE_PI * (float) Math.asin(1f);
if (input < 1f) {
return -0.5f
* ((float) Math.pow(2f, 10f * (input -= 1f))
* (float) Math.sin((input * 1f - s) * DOUBLE_PI * p));
}
return 1f + 0.5f
* (float) Math.pow(2f, -10f * (input -= 1f))
* (float) Math.sin((input * 1f - s) * DOUBLE_PI * p);
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseInBack = new EasingFunction() {
public float getInterpolation(float input) {
final float s = 1.70158f;
return input * input * ((s + 1f) * input - s);
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseOutBack = new EasingFunction() {
public float getInterpolation(float input) {
final float s = 1.70158f;
input--;
return (input * input * ((s + 1f) * input + s) + 1f);
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseInOutBack = new EasingFunction() {
public float getInterpolation(float input) {
float s = 1.70158f;
input *= 2f;
if (input < 1f) {
return 0.5f * (input * input * (((s *= (1.525f)) + 1f) * input - s));
}
return 0.5f * ((input -= 2f) * input * (((s *= (1.525f)) + 1f) * input + s) + 2f);
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseInBounce = new EasingFunction() {
public float getInterpolation(float input) {
return 1f - EaseOutBounce.getInterpolation(1f - input);
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseOutBounce = new EasingFunction() {
public float getInterpolation(float input) {
float s = 7.5625f;
if (input < (1f / 2.75f)) {
return s * input * input;
} else if (input < (2f / 2.75f)) {
return s * (input -= (1.5f / 2.75f)) * input + 0.75f;
} else if (input < (2.5f / 2.75f)) {
return s * (input -= (2.25f / 2.75f)) * input + 0.9375f;
}
return s * (input -= (2.625f / 2.75f)) * input + 0.984375f;
}
};
@SuppressWarnings("unused")
public static final EasingFunction EaseInOutBounce = new EasingFunction() {
public float getInterpolation(float input) {
if (input < 0.5f) {
return EaseInBounce.getInterpolation(input * 2f) * 0.5f;
}
return EaseOutBounce.getInterpolation(input * 2f - 1f) * 0.5f + 0.5f;
}
};
}