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26 lines
721 B
C#
26 lines
721 B
C#
public static class GoEaseBack
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{
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public static float EaseIn( float t, float b, float c, float d )
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{
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return c * ( t /= d ) * t * ( ( 1.70158f + 1 ) * t - 1.70158f ) + b;
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}
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public static float EaseOut( float t, float b, float c, float d )
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{
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return c * ( ( t = t / d - 1 ) * t * ( ( 1.70158f + 1 ) * t + 1.70158f ) + 1 ) + b;
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}
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public static float EaseInOut( float t, float b, float c, float d )
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{
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float s = 1.70158f;
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if( ( t /= d / 2 ) < 1 )
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{
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return c / 2 * ( t * t * ( ( ( s *= ( 1.525f ) ) + 1 ) * t - s ) ) + b;
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}
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return c / 2 * ( ( t -= 2 ) * t * ( ( ( s *= ( 1.525f ) ) + 1 ) * t + s ) + 2 ) + b;
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}
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}
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