Diff: easing.h

Revision:

0:f759a823d3ae

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/easing.h	Tue Oct 10 07:17:45 2017 +0000
@@ -0,0 +1,128 @@
+// t = time, b = start, c = end, d = duration
+//float PI = 3.141591;
+
+float easeInQuad(float t, float b, float c, float d) {
+    return c*(t/=d)*t + b;
+}
+float easeOutQuad(float t, float b, float c, float d) {
+    return -c *(t/=d)*(t-2) + b;
+}
+float easeInOutQuad(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 easeInCubic(float t, float b, float c, float d) {
+    return c*(t/=d)*t*t + b;
+}
+float easeOutCubic(float t, float b, float c, float d) {
+    return c*((t=t/d-1)*t*t + 1) + b;
+}
+float easeInOutCubic(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 easeInQuart(float t, float b, float c, float d) {
+    return c*(t/=d)*t*t*t + b;
+}
+float easeOutQuart(float t, float b, float c, float d) {
+    return -c * ((t=t/d-1)*t*t*t - 1) + b;
+}
+float easeInOutQuart(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 easeInQuint(float t, float b, float c, float d) {
+    return c*(t/=d)*t*t*t*t + b;
+}
+float easeOutQuint(float t, float b, float c, float d) {
+    return c*((t=t/d-1)*t*t*t*t + 1) + b;
+}
+float easeInOutQuint(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 easeInSine(float t, float b, float c, float d) {
+    return -c * cos(t/d * (PI/2)) + c + b;
+}
+float easeOutSine(float t, float b, float c, float d) {
+    return c * sin(t/d * (PI/2)) + b;
+}
+float easeInOutSine(float t, float b, float c, float d) {
+    return -c/2 * (cos(PI*t/d) - 1) + b;
+}
+float easeInExpo(float t, float b, float c, float d) {
+    return (t==0) ? b : c * pow(2, 10 * (t/d - 1)) + b;
+}
+float easeOutExpo(float t, float b, float c, float d) {
+    return (t==d) ? b+c : c * (-pow(2, -10 * t/d) + 1) + b;
+}
+float easeInOutExpo(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 easeInCirc(float t, float b, float c, float d) {
+    return -c * (sqrt(1 - (t/=d)*t) - 1) + b;
+}
+float easeOutCirc(float t, float b, float c, float d) {
+    return c * sqrt(1 - (t=t/d-1)*t) + b;
+}
+float easeInOutCirc(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 easeInElastic(float t, float b, float c, float d) {
+    float s=1.70158;float p=0; float a=c;
+    if (t==0) return b;  if ((t/=d)==1) return b+c;  if (!p) p=d*.3;
+    if (a < abs(c)) { a=c; s=p/4; }
+    else  s = p/(2*PI) * asin (c/a);
+    return -(a*pow(2,10*(t-=1)) * sin( (t*d-s)*(2*PI)/p )) + b;
+}
+float easeOutElastic(float t, float b, float c, float d) {
+    float s=1.70158;float p=0;float a=c;
+    if (t==0) return b;  if ((t/=d)==1) return b+c;  if (!p) p=d*.3;
+    if (a < abs(c)) { a=c; s=p/4; }
+    else s = p/(2*PI) * asin (c/a);
+    return a*pow(2,-10*t) * sin( (t*d-s)*(2*PI)/p ) + c + b;
+}
+float easeInOutElastic(float t, float b, float c, float d) {
+    float s=1.70158;float p=0;float a=c;
+    if (t==0) return b;  if ((t/=d/2)==2) return b+c;  if (!p) p=d*(.3*1.5);
+    if (a < abs(c)) { a=c; s=p/4; }
+    else s = p/(2*PI) * asin (c/a);
+    if (t < 1) return -.5*(a*pow(2,10*(t-=1)) * sin( (t*d-s)*(2*PI)/p )) + b;
+    return a*pow(2,-10*(t-=1)) * sin( (t*d-s)*(2*PI)/p )*.5 + c + b;
+}
+float easeInBack(float t, float b, float c, float d) {
+    float s = 1.70158;
+    return c*(t/=d)*t*((s+1)*t - s) + b;
+}
+float easeOutBack(float t, float b, float c, float d) {
+    float s = 1.70158;
+    return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
+}
+float easeInOutBack(float t, float b, float c, float d) {
+    float 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;
+}
+
+float easeOutBounce(float t, float b, float c, float 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;
+    }
+}
+float easeInBounce(float t, float b, float c, float d) {
+    return c - easeOutBounce (d-t, 0, c, d) + b;
+}
+float easeInOutBounce(float t, float b, float c, float d) {
+    if (t < d/2) return easeInBounce (t*2, 0, c, d) * .5 + b;
+    return easeOutBounce (t*2-d, 0, c, d) * .5 + c*.5 + b;
+}