axmol/extensions/CCArmature/utils/CCTweenFunction.cpp

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#include "CCTweenFunction.h"
#include "CCUtilMath.h"

NS_CC_EXT_BEGIN

float CCTweenFunction::tweenTo(float from, float change, float time, float duration, CCTweenType tweenType)
{
    float delta = 0;

    switch (tweenType)
    {
    case Linear:
        delta = linear(time, 0, 1, duration);
        break;

    case Sine_EaseIn:
        delta = sineEaseIn(time, 0, 1, duration);
        break;
    case Sine_EaseOut:
        delta = sineEaseOut(time, 0, 1, duration);
        break;
    case Sine_EaseInOut:
        delta = sineEaseInOut(time, 0, 1, duration);
        break;

    case Quad_EaseIn:
        delta = quadEaseIn(time, 0, 1, duration);
        break;
    case Quad_EaseOut:
        delta = quadEaseOut(time, 0, 1, duration);
        break;
    case Quad_EaseInOut:
        delta = quadEaseInOut(time, 0, 1, duration);
        break;

    case Cubic_EaseIn:
        delta = cubicEaseIn(time, 0, 1, duration);
        break;
    case Cubic_EaseOut:
        delta = cubicEaseOut(time, 0, 1, duration);
        break;
    case Cubic_EaseInOut:
        delta = cubicEaseInOut(time, 0, 1, duration);
        break;

    case Quart_EaseIn:
        delta = quartEaseIn(time, 0, 1, duration);
        break;
    case Quart_EaseOut:
        delta = quartEaseOut(time, 0, 1, duration);
        break;
    case Quart_EaseInOut:
        delta = quartEaseInOut(time, 0, 1, duration);
        break;

    case Quint_EaseIn:
        delta = quintEaseIn(time, 0, 1, duration);
        break;
    case Quint_EaseOut:
        delta = quintEaseOut(time, 0, 1, duration);
        break;
    case Quint_EaseInOut:
        delta = quintEaseInOut(time, 0, 1, duration);
        break;

    case Expo_EaseIn:
        delta = expoEaseIn(time, 0, 1, duration);
        break;
    case Expo_EaseOut:
        delta = expoEaseOut(time, 0, 1, duration);
        break;
    case Expo_EaseInOut:
        delta = expoEaseInOut(time, 0, 1, duration);
        break;

    case Circ_EaseIn:
        delta = circEaseIn(time, 0, 1, duration);
        break;
    case Circ_EaseOut:
        delta = circEaseOut(time, 0, 1, duration);
        break;
    case Circ_EaseInOut:
        delta = circEaseInOut(time, 0, 1, duration);
        break;

    case Elastic_EaseIn:
        delta = elasticEaseIn(time, 0, 1, duration);
        break;
    case Elastic_EaseOut:
        delta = elasticEaseOut(time, 0, 1, duration);
        break;
    case Elastic_EaseInOut:
        delta = elasticEaseInOut(time, 0, 1, duration);
        break;


    case Back_EaseIn:
        delta = backEaseIn(time, 0, 1, duration);
        break;
    case Back_EaseOut:
        delta = backEaseOut(time, 0, 1, duration);
        break;
    case Back_EaseInOut:
        delta = backEaseInOut(time, 0, 1, duration);
        break;

    case Bounce_EaseIn:
        delta = bounceEaseIn(time, 0, 1, duration);
        break;
    case Bounce_EaseOut:
        delta = bounceEaseOut(time, 0, 1, duration);
        break;
    case Bounce_EaseInOut:
        delta = bounceEaseInOut(time, 0, 1, duration);
        break;

    default:
        delta = sineEaseInOut(time, 0, 1, duration);
        break;
    }

    return delta;
}

float CCTweenFunction::linear(float t, float b, float c, float d)
{
    return c * t / d + b;
}

float CCTweenFunction::quadEaseIn(float t, float b, float c, float d)
{
    return c * (t /= d) * t + b;
}
float CCTweenFunction::quadEaseOut(float t, float b, float c, float d)
{
    return -c * (t /= d) * (t - 2) + b;
}
float CCTweenFunction::quadEaseInOut(float t, float b, float c, float d)
{
    if ((t /= d / 2) < 1)
        return c / 2 * t * t + b;
    return -c / 2 * ((--t) * (t - 2) - 1) + b;
}

float CCTweenFunction::cubicEaseIn(float t, float b, float c, float d)
{
    return c * (t /= d) * t * t + b;
}
float CCTweenFunction::cubicEaseOut(float t, float b, float c, float d)
{
    return c * (( t = t / d - 1) * t * t + 1) + b;
}
float CCTweenFunction::cubicEaseInOut(float t, float b, float c, float d)
{
    if ((t /= d / 2) < 1)
        return c / 2 * t * t * t + b;
    return c / 2 * ((t -= 2) * t * t + 2) + b;
}

float CCTweenFunction::quartEaseIn(float t, float b, float c, float d)
{
    return c * (t /= d) * t * t * t + b;
}
float CCTweenFunction::quartEaseOut(float t, float b, float c, float d)
{
    return -c * (( t = t / d - 1) * t * t * t - 1) + b;
}
float CCTweenFunction::quartEaseInOut(float t, float b, float c, float d)
{
    if ((t /= d / 2) < 1)
        return c / 2 * t * t * t * t + b;
    return -c / 2 * ((t -= 2) * t * t * t - 2) + b;
}

float CCTweenFunction::quintEaseIn(float t, float b, float c, float d)
{
    return c * (t /= d) * t * t * t * t + b;
}
float CCTweenFunction::quintEaseOut(float t, float b, float c, float d)
{
    return c * (( t = t / d - 1) * t * t * t * t + 1) + b;
}
float CCTweenFunction::quintEaseInOut(float t, float b, float c, float d)
{
    if ((t /= d / 2) < 1)
        return c / 2 * t * t * t * t * t + b;
    return c / 2 * ((t -= 2) * t * t * t * t + 2) + b;
}

float CCTweenFunction::sineEaseIn(float t, float b, float c, float d)
{
    return -c * cos(t / d * (M_PI / 2)) + c + b;
}
float CCTweenFunction::sineEaseOut(float t, float b, float c, float d)
{
    return c * sin(t / d * (M_PI / 2)) + b;
}
float CCTweenFunction::sineEaseInOut(float t, float b, float c, float d)
{
    return -c / 2 * (cos(M_PI * t / d) - 1) + b;
}

float CCTweenFunction::expoEaseIn(float t, float b, float c, float d)
{
    return (t == 0) ? b : c * pow(2, 10 * (t / d - 1)) + b;
}
float CCTweenFunction::expoEaseOut(float t, float b, float c, float d)
{
    return (t == d) ? b + c : c * (-pow(2, -10 * t / d) + 1) + b;
}
float CCTweenFunction::expoEaseInOut(float t, float b, float c, float d)
{
    if (t == 0)
        return b;
    if (t == d)
        return b + c;
    if ((t /= d / 2) < 1)
        return c / 2 * pow(2, 10 * (t - 1)) + b;
    return c / 2 * (-pow(2, -10 * --t) + 2) + b;
}

float CCTweenFunction::circEaseIn(float t, float b, float c, float d)
{
    return -c * (sqrt(1 - (t /= d) * t) - 1) + b;
}
float CCTweenFunction::circEaseOut(float t, float b, float c, float d)
{
    return c * sqrt(1 - ( t = t / d - 1) * t) + b;
}
float CCTweenFunction::circEaseInOut(float t, float b, float c, float d)
{
    if ((t /= d / 2) < 1)
        return -c / 2 * (sqrt(1 - t * t) - 1) + b;
    return c / 2 * (sqrt(1 - (t -= 2) * t) + 1) + b;
}

float CCTweenFunction::elasticEaseIn(float t, float b, float c, float d, float a, float p)
{
    float s = 0;
    if (t == 0)
        return b;
    if ((t /= d) == 1)
        return b + c;
    if (!p)
        p = d * .3;
    if (!a || a < abs(c))
    {
        a = c;
        s = p / 4;
    }
    else
        s = p / (2 * M_PI) * asin(c / a);
    return -(a * pow(2, 10 * (t -= 1)) * sin((t * d - s) * (2 * M_PI) / p)) + b;
}
float CCTweenFunction::elasticEaseOut(float t, float b, float c, float d, float a, float p)
{
    float s = 0;
    if (t == 0)
        return b;
    if ((t /= d) == 1)
        return b + c;
    if (!p)
        p = d * .3;
    if (!a || a < abs(c))
    {
        a = c;
        s = p / 4;
    }
    else
        s = p / (2 * M_PI) * asin(c / a);
    return (a * pow(2, -10 * t) * sin((t * d - s) * (2 * M_PI) / p) + c + b);
}
float CCTweenFunction::elasticEaseInOut(float t, float b, float c, float d, float a, float p)
{
    float s = 0;
    if (t == 0)
        return b;
    if ((t /= d / 2) == 2)
        return b + c;
    if (!p)
        p = d * (.3 * 1.5);
    if (!a || a < abs(c))
    {
        a = c;
        s = p / 4;
    }
    else
        s = p / (2 * M_PI) * asin(c / a);
    if (t < 1)
        return -.5 * (a * pow(2, 10 * (t -= 1)) * sin((t * d - s) * (2 * M_PI) / p)) + b;
    return a * pow(2, -10 * (t -= 1)) * sin((t * d - s) * (2 * M_PI) / p) * .5 + c + b;
}

float CCTweenFunction::backEaseIn(float t, float b, float c, float d, float s)
{
    if (s == 0)
        s = 1.70158f;
    return c * (t /= d) * t * ((s + 1) * t - s) + b;
}
float CCTweenFunction::backEaseOut(float t, float b, float c, float d, float s)
{
    if (s == 0)
        s = 1.70158f;
    return c * (( t = t / d - 1) * t * ((s + 1) * t + s) + 1) + b;
}
float CCTweenFunction::backEaseInOut(float t, float b, float c, float d, float s)
{
    if (s == 0)
        s = 1.70158f;
    if ((t /= d / 2) < 1)
        return c / 2 * (t * t * (((s *= (1.525f)) + 1) * t - s)) + b;
    return c / 2 * ((t -= 2) * t * (((s *= (1.525f)) + 1) * t + s) + 2) + b;
}

float CCTweenFunction::bounceEaseIn(float t, float b, float c, float d)
{
    return c - bounceEaseOut(d - t, 0, c, d) + b;
}

float CCTweenFunction::bounceEaseOut(float t, float b, float c, float d)
{
    if ((t /= d) < (1 / 2.75f))
    {
        return c * (7.5625f * t * t) + b;
    }
    else if (t < (2 / 2.75f))
    {
        return c * (7.5625f * (t -= (1.5f / 2.75f)) * t + .75f) + b;
    }
    else if (t < (2.5f / 2.75f))
    {
        return c * (7.5625f * (t -= (2.25f / 2.75f)) * t + .9375f) + b;
    }
    else
    {
        return c * (7.5625f * (t -= (2.625f / 2.75f)) * t + .984375f) + b;
    }
}

float CCTweenFunction::bounceEaseInOut(float t, float b, float c, float d)
{
    if (t < d / 2)
        return bounceEaseIn(t * 2, 0, c, d) * .5 + b;
    else
        return bounceEaseOut(t * 2 - d, 0, c, d) * .5 + c * .5 + b;
}


NS_CC_EXT_END