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Merge pull request #1354 from Areloch/PVS_Cleanup_mEase
Cleanup of ease functions operations.
This commit is contained in:
Daniel Buckmaster
commit
e65afa95a9
1 changed files with 183 additions and 307 deletions
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@ -110,7 +110,8 @@ class EaseF : public Ease
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// simple linear tweening - no easing
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// t: current time, b: beginning value, c: change in value, d: duration
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inline F32 mLinearTween(F32 t, F32 b, F32 c, F32 d) {
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inline F32 mLinearTween(F32 t, F32 b, F32 c, F32 d)
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{
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return c*t/d + b;
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}
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@ -120,21 +121,25 @@ inline F32 mLinearTween(F32 t, F32 b, F32 c, F32 d) {
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// quadratic easing in - accelerating from zero velocity
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// t: current time, b: beginning value, c: change in value, d: duration
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// t and d can be in frames or seconds/milliseconds
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inline F32 mEaseInQuad(F32 t, F32 b, F32 c, F32 d) {
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inline F32 mEaseInQuad(F32 t, F32 b, F32 c, F32 d)
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{
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t /= d;
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return c*t*t + b;
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};
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// quadratic easing out - decelerating to zero velocity
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inline F32 mEaseOutQuad(F32 t, F32 b, F32 c, F32 d) {
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inline F32 mEaseOutQuad(F32 t, F32 b, F32 c, F32 d)
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{
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t /= d;
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return -c * t*(t-2) + b;
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};
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// quadratic easing in/out - acceleration until halfway, then deceleration
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inline F32 mEaseInOutQuad(F32 t, F32 b, F32 c, F32 d) {
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inline F32 mEaseInOutQuad(F32 t, F32 b, F32 c, F32 d)
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{
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t /= d/2;
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if (t < 1) return c/2*t*t + b;
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if (t < 1)
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return c/2*t*t + b;
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t--;
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return -c/2 * (t*(t-2) - 1) + b;
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};
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@ -144,22 +149,26 @@ inline F32 mEaseInOutQuad(F32 t, F32 b, F32 c, F32 d) {
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// cubic easing in - accelerating from zero velocity
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// t: current time, b: beginning value, c: change in value, d: duration
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// t and d can be frames or seconds/milliseconds
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inline F32 mEaseInCubic(F32 t, F32 b, F32 c, F32 d) {
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inline F32 mEaseInCubic(F32 t, F32 b, F32 c, F32 d)
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{
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t /= d;
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return c*t*t*t + b;
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};
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// cubic easing out - decelerating to zero velocity
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inline F32 mEaseOutCubic(F32 t, F32 b, F32 c, F32 d) {
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inline F32 mEaseOutCubic(F32 t, F32 b, F32 c, F32 d)
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{
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t /= d;
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t--;
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return c*(t*t*t + 1) + b;
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};
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// cubic easing in/out - acceleration until halfway, then deceleration
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inline F32 mEaseInOutCubic(F32 t, F32 b, F32 c, F32 d) {
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inline F32 mEaseInOutCubic(F32 t, F32 b, F32 c, F32 d)
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{
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t /= d/2;
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if (t < 1) return c/2*t*t*t + b;
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if (t < 1)
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return c/2*t*t*t + b;
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t -= 2;
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return c/2*(t*t*t + 2) + b;
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};
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@ -170,22 +179,26 @@ inline F32 mEaseInOutCubic(F32 t, F32 b, F32 c, F32 d) {
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// quartic easing in - accelerating from zero velocity
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// t: current time, b: beginning value, c: change in value, d: duration
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// t and d can be frames or seconds/milliseconds
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inline F32 mEaseInQuart(F32 t, F32 b, F32 c, F32 d) {
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inline F32 mEaseInQuart(F32 t, F32 b, F32 c, F32 d)
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{
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t /= d;
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return c*t*t*t*t + b;
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};
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// quartic easing out - decelerating to zero velocity
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inline F32 mEaseOutQuart(F32 t, F32 b, F32 c, F32 d) {
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inline F32 mEaseOutQuart(F32 t, F32 b, F32 c, F32 d)
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{
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t /= d;
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t--;
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return -c * (t*t*t*t - 1) + b;
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};
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// quartic easing in/out - acceleration until halfway, then deceleration
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inline F32 mEaseInOutQuart(F32 t, F32 b, F32 c, F32 d) {
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inline F32 mEaseInOutQuart(F32 t, F32 b, F32 c, F32 d)
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{
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t /= d/2;
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if (t < 1) return c/2*t*t*t*t + b;
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if (t < 1)
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return c/2*t*t*t*t + b;
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t -= 2;
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return -c/2 * (t*t*t*t - 2) + b;
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};
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@ -196,22 +209,26 @@ inline F32 mEaseInOutQuart(F32 t, F32 b, F32 c, F32 d) {
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// quintic easing in - accelerating from zero velocity
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// t: current time, b: beginning value, c: change in value, d: duration
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// t and d can be frames or seconds/milliseconds
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inline F32 mEaseInQuint(F32 t, F32 b, F32 c, F32 d) {
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inline F32 mEaseInQuint(F32 t, F32 b, F32 c, F32 d)
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{
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t /= d;
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return c*t*t*t*t*t + b;
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};
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// quintic easing out - decelerating to zero velocity
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inline F32 mEaseOutQuint(F32 t, F32 b, F32 c, F32 d) {
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inline F32 mEaseOutQuint(F32 t, F32 b, F32 c, F32 d)
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{
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t /= d;
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t--;
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return c*(t*t*t*t*t + 1) + b;
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};
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// quintic easing in/out - acceleration until halfway, then deceleration
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inline F32 mEaseInOutQuint(F32 t, F32 b, F32 c, F32 d) {
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inline F32 mEaseInOutQuint(F32 t, F32 b, F32 c, F32 d)
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{
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t /= d/2;
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if (t < 1) return c/2*t*t*t*t*t + b;
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if (t < 1)
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return c/2*t*t*t*t*t + b;
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t -= 2;
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return c/2*(t*t*t*t*t + 2) + b;
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};
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@ -222,17 +239,20 @@ inline F32 mEaseInOutQuint(F32 t, F32 b, F32 c, F32 d) {
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// sinusoidal easing in - accelerating from zero velocity
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// t: current time, b: beginning value, c: change in position, d: duration
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inline F32 mEaseInSine(F32 t, F32 b, F32 c, F32 d) {
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inline F32 mEaseInSine(F32 t, F32 b, F32 c, F32 d)
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{
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return -c * mCos(t/d * (M_PI_F/2)) + c + b;
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};
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// sinusoidal easing out - decelerating to zero velocity
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inline F32 mEaseOutSine(F32 t, F32 b, F32 c, F32 d) {
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inline F32 mEaseOutSine(F32 t, F32 b, F32 c, F32 d)
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{
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return c * mSin(t/d * (M_PI_F/2)) + b;
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};
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// sinusoidal easing in/out - accelerating until halfway, then decelerating
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inline F32 mEaseInOutSine(F32 t, F32 b, F32 c, F32 d) {
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inline F32 mEaseInOutSine(F32 t, F32 b, F32 c, F32 d)
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{
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return -c/2 * (mCos(M_PI_F*t/d) - 1) + b;
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};
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@ -241,19 +261,23 @@ inline F32 mEaseInOutSine(F32 t, F32 b, F32 c, F32 d) {
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// exponential easing in - accelerating from zero velocity
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// t: current time, b: beginning value, c: change in position, d: duration
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inline F32 mEaseInExpo(F32 t, F32 b, F32 c, F32 d) {
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inline F32 mEaseInExpo(F32 t, F32 b, F32 c, F32 d)
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{
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return c * mPow( 2, 10 * (t/d - 1) ) + b;
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};
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// exponential easing out - decelerating to zero velocity
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inline F32 mEaseOutExpo(F32 t, F32 b, F32 c, F32 d) {
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inline F32 mEaseOutExpo(F32 t, F32 b, F32 c, F32 d)
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{
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return c * ( -mPow( 2, -10 * t/d ) + 1 ) + b;
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};
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// exponential easing in/out - accelerating until halfway, then decelerating
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inline F32 mEaseInOutExpo(F32 t, F32 b, F32 c, F32 d) {
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inline F32 mEaseInOutExpo(F32 t, F32 b, F32 c, F32 d)
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{
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t /= d/2;
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if (t < 1) return c/2 * mPow( 2, 10 * (t - 1) ) + b;
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if (t < 1)
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return c/2 * mPow( 2, 10 * (t - 1) ) + b;
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t--;
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return c/2 * ( -mPow( 2, -10 * t) + 2 ) + b;
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};
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@ -263,18 +287,23 @@ inline F32 mEaseInOutExpo(F32 t, F32 b, F32 c, F32 d) {
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// circular easing in - accelerating from zero velocity
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// t: current time, b: beginning value, c: change in position, d: duration
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inline F32 mEaseInCirc (F32 t, F32 b, F32 c, F32 d) {
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inline F32 mEaseInCirc (F32 t, F32 b, F32 c, F32 d)
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{
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return -c * (mSqrt(1 - (t/=d)*t) - 1) + b;
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};
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// circular easing out - decelerating to zero velocity
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inline F32 mEaseOutCirc (F32 t, F32 b, F32 c, F32 d) {
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inline F32 mEaseOutCirc (F32 t, F32 b, F32 c, F32 d)
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{
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return c * mSqrt(1 - (t=t/d-1)*t) + b;
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};
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// circular easing in/out - acceleration until halfway, then deceleration
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inline F32 mEaseInOutCirc(F32 t, F32 b, F32 c, F32 d) {
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if ((t/=d/2) < 1) return -c/2 * (mSqrt(1 - t*t) - 1) + b;
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inline F32 mEaseInOutCirc(F32 t, F32 b, F32 c, F32 d)
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{
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if ((t/=d/2) < 1)
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return -c/2 * (mSqrt(1 - t*t) - 1) + b;
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return c/2 * (mSqrt(1 - (t-=2)*t) + 1) + b;
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};
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@ -284,29 +313,84 @@ inline F32 mEaseInOutCirc(F32 t, F32 b, F32 c, F32 d) {
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// t: current time, b: beginning value, c: change in value, d: duration, a: amplitude (optional), p: period (optional)
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// t and d can be in frames or seconds/milliseconds
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inline F32 mEaseInElastic(F32 t, F32 b, F32 c, F32 d, F32 a, F32 p) {
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if (t==0) return b; if ((t/=d)==1) return b+c; if (p<=0) p=d*.3f;
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inline F32 mEaseInElastic(F32 t, F32 b, F32 c, F32 d, F32 a, F32 p)
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{
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if (t==0)
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return b;
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F32 dt = t /= d;
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if (dt == 1)
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return b+c;
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if (p<=0)
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p=d*.3f;
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F32 s;
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if (a < mFabs(c)) { a=c; s=p/4; }
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else s = p/(2*M_PI_F) * mAsin (c/a);
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return -(a*mPow(2,10*(t-=1)) * mSin( (t*d-s)*(2*M_PI_F)/p )) + b;
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if (a < mFabs(c))
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{
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a=c;
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s=p/4;
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}
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else
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s = p/(2*M_PI_F) * mAsin (c/a);
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t -= 1;
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return -(a*mPow(2,10*t) * mSin( (t*d-s)*(2*M_PI_F)/p )) + b;
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};
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inline F32 mEaseOutElastic(F32 t, F32 b, F32 c, F32 d, F32 a, F32 p) {
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if (t==0) return b; if ((t/=d)==1) return b+c; if (p<=0) p=d*.3f;
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inline F32 mEaseOutElastic(F32 t, F32 b, F32 c, F32 d, F32 a, F32 p)
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{
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if (t==0)
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return b;
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F32 dt = t /= d;
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if (dt == 1)
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return b+c;
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if (p<=0)
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p=d*.3f;
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F32 s;
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if (a < mFabs(c)) { a=c; s=p/4; }
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else s = p/(2*M_PI_F) * mAsin (c/a);
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if (a < mFabs(c))
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{
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a=c;
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s=p/4;
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}
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else
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s = p/(2*M_PI_F) * mAsin (c/a);
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return a*mPow(2,-10*t) * mSin( (t*d-s)*(2*M_PI_F)/p ) + c + b;
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};
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inline F32 mEaseInOutElastic(F32 t, F32 b, F32 c, F32 d, F32 a, F32 p) {
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if (t==0) return b; if ((t/=d/2)==2) return b+c; if (p<=0) p=d*(.3f*1.5f);
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inline F32 mEaseInOutElastic(F32 t, F32 b, F32 c, F32 d, F32 a, F32 p)
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{
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if (t==0)
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return b;
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F32 dt = t /= d / 2;
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if (dt == 2)
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return b+c;
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if (p<=0)
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p=d*(.3f*1.5f);
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F32 s;
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if (a < mFabs(c)) { a=c; s=p/4; }
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else s = p/(2*M_PI_F) * mAsin (c/a);
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if (t < 1) return -.5f*(a*mPow(2,10*(t-=1)) * mSin( (t*d-s)*(2*M_PI_F)/p )) + b;
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return a*mPow(2,-10*(t-=1)) * mSin( (t*d-s)*(2*M_PI_F)/p )*.5f + c + b;
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if (a < mFabs(c))
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{
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a=c;
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s=p/4;
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}
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else
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s = p/(2*M_PI_F) * mAsin (c/a);
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if (t < 1)
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{
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t -= 1;
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return -.5f*(a*mPow(2, 10 * t) * mSin((t*d - s)*(2 * M_PI_F) / p)) + b;
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}
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t -= 1;
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return a*mPow(2,-10*t) * mSin( (t*d-s)*(2*M_PI_F)/p )*.5f + c + b;
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};
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@ -318,294 +402,86 @@ inline F32 mEaseInOutElastic(F32 t, F32 b, F32 c, F32 d, F32 a, F32 p) {
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// s controls the amount of overshoot: higher s means greater overshoot
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// s has a default value of 1.70158, which produces an overshoot of 10 percent
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// s==0 produces cubic easing with no overshoot
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inline F32 mEaseInBack(F32 t, F32 b, F32 c, F32 d, F32 s) {
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if (s < 0) s = 1.70158f;
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return c*(t/=d)*t*((s+1)*t - s) + b;
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inline F32 mEaseInBack(F32 t, F32 b, F32 c, F32 d, F32 s)
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{
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if (s < 0)
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s = 1.70158f;
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F32 td = t /= d;
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return c*td*t*((s + 1)*t - s) + b;
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};
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// back easing out - moving towards target, overshooting it slightly, then reversing and coming back to target
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inline F32 mEaseOutBack(F32 t, F32 b, F32 c, F32 d, F32 s) {
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if (s < 0) s = 1.70158f;
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return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
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inline F32 mEaseOutBack(F32 t, F32 b, F32 c, F32 d, F32 s)
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{
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if (s < 0)
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s = 1.70158f;
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F32 td = t / d - 1;
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t = td;
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return c*(td*t*((s + 1)*t + s) + 1) + b;
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};
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// back easing in/out - backtracking slightly, then reversing direction and moving to target,
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// then overshooting target, reversing, and finally coming back to target
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inline F32 mEaseInOutBack(F32 t, F32 b, F32 c, F32 d, F32 s) {
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if (s < 0) s = 1.70158f;
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if ((t/=d/2) < 1) return c/2*(t*t*(((s*=(1.525f))+1)*t - s)) + b;
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return c/2*((t-=2)*t*(((s*=(1.525f))+1)*t + s) + 2) + b;
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inline F32 mEaseInOutBack(F32 t, F32 b, F32 c, F32 d, F32 s)
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{
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if (s < 0)
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s = 1.70158f;
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F32 td = t /= d / 2;
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if (td < 1)
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{
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s *= 1.525f;
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return c / 2 * (t*t*((s + 1)*t - s)) + b;
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}
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s *= 1.525f;
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t -= 2;
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return c/2*(t*t*((s+1)*t + s) + 2) + b;
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};
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/////////// BOUNCE EASING: exponentially decaying parabolic bounce //////////////
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// bounce easing out
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inline F32 mEaseOutBounce(F32 t, F32 b, F32 c, F32 d) {
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if ((t/=d) < (1/2.75f)) {
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inline F32 mEaseOutBounce(F32 t, F32 b, F32 c, F32 d)
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{
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if ((t/=d) < (1/2.75f))
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{
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return c*(7.5625f*t*t) + b;
|
||||
} else if (t < (2/2.75)) {
|
||||
return c*(7.5625f*(t-=(1.5f/2.75f))*t + .75f) + b;
|
||||
} else if (t < (2.5/2.75)) {
|
||||
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;
|
||||
}
|
||||
else if (t < (2/2.75))
|
||||
{
|
||||
t -= 1.5f / 2.75f;
|
||||
return c*(7.5625f*t*t + .75f) + b;
|
||||
}
|
||||
else if (t < (2.5/2.75))
|
||||
{
|
||||
t -= 2.25f / 2.75f;
|
||||
return c*(7.5625f*t*t + .9375f) + b;
|
||||
}
|
||||
else
|
||||
{
|
||||
t -= 2.625f / 2.75f;
|
||||
return c*(7.5625f*t*t + .984375f) + b;
|
||||
}
|
||||
};
|
||||
|
||||
// bounce easing in
|
||||
// t: current time, b: beginning value, c: change in position, d: duration
|
||||
inline F32 mEaseInBounce(F32 t, F32 b, F32 c, F32 d) {
|
||||
inline F32 mEaseInBounce(F32 t, F32 b, F32 c, F32 d)
|
||||
{
|
||||
return c - mEaseOutBounce (d-t, 0, c, d) + b;
|
||||
};
|
||||
|
||||
// bounce easing in/out
|
||||
inline F32 mEaseInOutBounce(F32 t, F32 b, F32 c, F32 d) {
|
||||
if (t < d/2) return mEaseInBounce (t*2, 0, c, d) * .5f + b;
|
||||
inline F32 mEaseInOutBounce(F32 t, F32 b, F32 c, F32 d)
|
||||
{
|
||||
if (t < d/2)
|
||||
return mEaseInBounce (t*2, 0, c, d) * .5f + b;
|
||||
|
||||
return mEaseOutBounce (t*2-d, 0, c, d) * .5f + c*.5f + b;
|
||||
};
|
||||
|
||||
|
||||
#if 0
|
||||
// ORIGINAL ACTION SCRIPT CODE:
|
||||
|
||||
// simple linear tweening - no easing
|
||||
// t: current time, b: beginning value, c: change in value, d: duration
|
||||
Math.linearTween = function (t, b, c, d) {
|
||||
return c*t/d + b;
|
||||
};
|
||||
|
||||
|
||||
///////////// QUADRATIC EASING: t^2 ///////////////////
|
||||
|
||||
// quadratic easing in - accelerating from zero velocity
|
||||
// t: current time, b: beginning value, c: change in value, d: duration
|
||||
// t and d can be in frames or seconds/milliseconds
|
||||
Math.easeInQuad = function (t, b, c, d) {
|
||||
return c*(t/=d)*t + b;
|
||||
};
|
||||
|
||||
// quadratic easing out - decelerating to zero velocity
|
||||
Math.easeOutQuad = function (t, b, c, d) {
|
||||
return -c *(t/=d)*(t-2) + b;
|
||||
};
|
||||
|
||||
// quadratic easing in/out - acceleration until halfway, then deceleration
|
||||
Math.easeInOutQuad = function (t, b, c, d) {
|
||||
if ((t/=d/2) < 1) return c/2*t*t + b;
|
||||
return -c/2 * ((--t)*(t-2) - 1) + b;
|
||||
};
|
||||
|
||||
|
||||
///////////// CUBIC EASING: t^3 ///////////////////////
|
||||
|
||||
// cubic easing in - accelerating from zero velocity
|
||||
// t: current time, b: beginning value, c: change in value, d: duration
|
||||
// t and d can be frames or seconds/milliseconds
|
||||
Math.easeInCubic = function (t, b, c, d) {
|
||||
return c*(t/=d)*t*t + b;
|
||||
};
|
||||
|
||||
// cubic easing out - decelerating to zero velocity
|
||||
Math.easeOutCubic = function (t, b, c, d) {
|
||||
return c*((t=t/d-1)*t*t + 1) + b;
|
||||
};
|
||||
|
||||
// cubic easing in/out - acceleration until halfway, then deceleration
|
||||
Math.easeInOutCubic = function (t, b, c, d) {
|
||||
if ((t/=d/2) < 1) return c/2*t*t*t + b;
|
||||
return c/2*((t-=2)*t*t + 2) + b;
|
||||
};
|
||||
|
||||
|
||||
///////////// QUARTIC EASING: t^4 /////////////////////
|
||||
|
||||
// quartic easing in - accelerating from zero velocity
|
||||
// t: current time, b: beginning value, c: change in value, d: duration
|
||||
// t and d can be frames or seconds/milliseconds
|
||||
Math.easeInQuart = function (t, b, c, d) {
|
||||
return c*(t/=d)*t*t*t + b;
|
||||
};
|
||||
|
||||
// quartic easing out - decelerating to zero velocity
|
||||
Math.easeOutQuart = function (t, b, c, d) {
|
||||
return -c * ((t=t/d-1)*t*t*t - 1) + b;
|
||||
};
|
||||
|
||||
// quartic easing in/out - acceleration until halfway, then deceleration
|
||||
Math.easeInOutQuart = function (t, b, c, d) {
|
||||
if ((t/=d/2) < 1) return c/2*t*t*t*t + b;
|
||||
return -c/2 * ((t-=2)*t*t*t - 2) + b;
|
||||
};
|
||||
|
||||
|
||||
///////////// QUINTIC EASING: t^5 ////////////////////
|
||||
|
||||
// quintic easing in - accelerating from zero velocity
|
||||
// t: current time, b: beginning value, c: change in value, d: duration
|
||||
// t and d can be frames or seconds/milliseconds
|
||||
Math.easeInQuint = function (t, b, c, d) {
|
||||
return c*(t/=d)*t*t*t*t + b;
|
||||
};
|
||||
|
||||
// quintic easing out - decelerating to zero velocity
|
||||
Math.easeOutQuint = function (t, b, c, d) {
|
||||
return c*((t=t/d-1)*t*t*t*t + 1) + b;
|
||||
};
|
||||
|
||||
// quintic easing in/out - acceleration until halfway, then deceleration
|
||||
Math.easeInOutQuint = function (t, b, c, 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;
|
||||
};
|
||||
|
||||
|
||||
|
||||
///////////// SINUSOIDAL EASING: sin(t) ///////////////
|
||||
|
||||
// sinusoidal easing in - accelerating from zero velocity
|
||||
// t: current time, b: beginning value, c: change in position, d: duration
|
||||
Math.easeInSine = function (t, b, c, d) {
|
||||
return -c * Math.cos(t/d * (Math.PI/2)) + c + b;
|
||||
};
|
||||
|
||||
// sinusoidal easing out - decelerating to zero velocity
|
||||
Math.easeOutSine = function (t, b, c, d) {
|
||||
return c * Math.sin(t/d * (Math.PI/2)) + b;
|
||||
};
|
||||
|
||||
// sinusoidal easing in/out - accelerating until halfway, then decelerating
|
||||
Math.easeInOutSine = function (t, b, c, d) {
|
||||
return -c/2 * (Math.cos(Math.PI*t/d) - 1) + b;
|
||||
};
|
||||
|
||||
|
||||
///////////// EXPONENTIAL EASING: 2^t /////////////////
|
||||
|
||||
// exponential easing in - accelerating from zero velocity
|
||||
// t: current time, b: beginning value, c: change in position, d: duration
|
||||
Math.easeInExpo = function (t, b, c, d) {
|
||||
return (t==0) ? b : c * Math.pow(2, 10 * (t/d - 1)) + b;
|
||||
};
|
||||
|
||||
// exponential easing out - decelerating to zero velocity
|
||||
Math.easeOutExpo = function (t, b, c, d) {
|
||||
return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
|
||||
};
|
||||
|
||||
// exponential easing in/out - accelerating until halfway, then decelerating
|
||||
Math.easeInOutExpo = function (t, b, c, d) {
|
||||
if (t==0) return b;
|
||||
if (t==d) return b+c;
|
||||
if ((t/=d/2) < 1) return c/2 * Math.pow(2, 10 * (t - 1)) + b;
|
||||
return c/2 * (-Math.pow(2, -10 * --t) + 2) + b;
|
||||
};
|
||||
|
||||
|
||||
/////////// CIRCULAR EASING: sqrt(1-t^2) //////////////
|
||||
|
||||
// circular easing in - accelerating from zero velocity
|
||||
// t: current time, b: beginning value, c: change in position, d: duration
|
||||
Math.easeInCirc = function (t, b, c, d) {
|
||||
return -c * (Math.sqrt(1 - (t/=d)*t) - 1) + b;
|
||||
};
|
||||
|
||||
// circular easing out - decelerating to zero velocity
|
||||
Math.easeOutCirc = function (t, b, c, d) {
|
||||
return c * Math.sqrt(1 - (t=t/d-1)*t) + b;
|
||||
};
|
||||
|
||||
// circular easing in/out - acceleration until halfway, then deceleration
|
||||
Math.easeInOutCirc = function (t, b, c, d) {
|
||||
if ((t/=d/2) < 1) return -c/2 * (Math.sqrt(1 - t*t) - 1) + b;
|
||||
return c/2 * (Math.sqrt(1 - (t-=2)*t) + 1) + b;
|
||||
};
|
||||
|
||||
|
||||
/////////// ELASTIC EASING: exponentially decaying sine wave //////////////
|
||||
|
||||
// t: current time, b: beginning value, c: change in value, d: duration, a: amplitude (optional), p: period (optional)
|
||||
// t and d can be in frames or seconds/milliseconds
|
||||
|
||||
Math.easeInElastic = function (t, b, c, d, a, p) {
|
||||
if (t==0) return b; if ((t/=d)==1) return b+c; if (!p) p=d*.3;
|
||||
if (a < Math.abs(c)) { a=c; var s=p/4; }
|
||||
else var s = p/(2*Math.PI) * Math.asin (c/a);
|
||||
return -(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
|
||||
};
|
||||
|
||||
Math.easeOutElastic = function (t, b, c, d, a, p) {
|
||||
if (t==0) return b; if ((t/=d)==1) return b+c; if (!p) p=d*.3;
|
||||
if (a < Math.abs(c)) { a=c; var s=p/4; }
|
||||
else var s = p/(2*Math.PI) * Math.asin (c/a);
|
||||
return a*Math.pow(2,-10*t) * Math.sin( (t*d-s)*(2*Math.PI)/p ) + c + b;
|
||||
};
|
||||
|
||||
Math.easeInOutElastic = function (t, b, c, d, a, p) {
|
||||
if (t==0) return b; if ((t/=d/2)==2) return b+c; if (!p) p=d*(.3*1.5);
|
||||
if (a < Math.abs(c)) { a=c; var s=p/4; }
|
||||
else var s = p/(2*Math.PI) * Math.asin (c/a);
|
||||
if (t < 1) return -.5*(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
|
||||
return a*Math.pow(2,-10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )*.5 + c + b;
|
||||
};
|
||||
|
||||
|
||||
/////////// BACK EASING: overshooting cubic easing: (s+1)*t^3 - s*t^2 //////////////
|
||||
|
||||
// back easing in - backtracking slightly, then reversing direction and moving to target
|
||||
// t: current time, b: beginning value, c: change in value, d: duration, s: overshoot amount (optional)
|
||||
// t and d can be in frames or seconds/milliseconds
|
||||
// s controls the amount of overshoot: higher s means greater overshoot
|
||||
// s has a default value of 1.70158, which produces an overshoot of 10 percent
|
||||
// s==0 produces cubic easing with no overshoot
|
||||
Math.easeInBack = function (t, b, c, d, s) {
|
||||
if (s == undefined) s = 1.70158;
|
||||
return c*(t/=d)*t*((s+1)*t - s) + b;
|
||||
};
|
||||
|
||||
// back easing out - moving towards target, overshooting it slightly, then reversing and coming back to target
|
||||
Math.easeOutBack = function (t, b, c, d, s) {
|
||||
if (s == undefined) s = 1.70158;
|
||||
return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
|
||||
};
|
||||
|
||||
// back easing in/out - backtracking slightly, then reversing direction and moving to target,
|
||||
// then overshooting target, reversing, and finally coming back to target
|
||||
Math.easeInOutBack = function (t, b, c, d, s) {
|
||||
if (s == undefined) s = 1.70158;
|
||||
if ((t/=d/2) < 1) return c/2*(t*t*(((s*=(1.525))+1)*t - s)) + b;
|
||||
return c/2*((t-=2)*t*(((s*=(1.525))+1)*t + s) + 2) + b;
|
||||
};
|
||||
|
||||
|
||||
/////////// BOUNCE EASING: exponentially decaying parabolic bounce //////////////
|
||||
|
||||
// bounce easing in
|
||||
// t: current time, b: beginning value, c: change in position, d: duration
|
||||
Math.easeInBounce = function (t, b, c, d) {
|
||||
return c - Math.easeOutBounce (d-t, 0, c, d) + b;
|
||||
};
|
||||
|
||||
// bounce easing out
|
||||
Math.easeOutBounce = function (t, b, c, d) {
|
||||
if ((t/=d) < (1/2.75)) {
|
||||
return c*(7.5625*t*t) + b;
|
||||
} else if (t < (2/2.75)) {
|
||||
return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b;
|
||||
} else if (t < (2.5/2.75)) {
|
||||
return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b;
|
||||
} else {
|
||||
return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b;
|
||||
}
|
||||
};
|
||||
|
||||
// bounce easing in/out
|
||||
Math.easeInOutBounce = function (t, b, c, d) {
|
||||
if (t < d/2) return Math.easeInBounce (t*2, 0, c, d) * .5 + b;
|
||||
return Math.easeOutBounce (t*2-d, 0, c, d) * .5 + c*.5 + b;
|
||||
};
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
#endif // _MEASE_H_
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue