jointrashposs/assets/js/particles/utils/ease.ts

/*
------------------------------------------
| inQuad:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on inQuad.
------------------------------------------ */
export function inQuad(t, b, c, d) {
	return c*(t/=d)*t + b;
}

/*
------------------------------------------
| outQuad:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on outQuad.
------------------------------------------ */
export function outQuad(t, b, c, d) {
	return -c *(t/=d)*(t-2) + b;
}

/*
------------------------------------------
| inOutQuad:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on inOutQuad.
------------------------------------------ */
export function inOutQuad(t, b, c, d) {
	if ((t/=d/2) < 1) return c/2*t*t + b;
	return -c/2 * ((--t)*(t-2) - 1) + b;
}

/*
------------------------------------------
| inCubic:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on inCubic.
------------------------------------------ */
export function inCubic(t, b, c, d) {
	return c*(t/=d)*t*t + b;
}

/*
------------------------------------------
| outCubic:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on outCubic.
------------------------------------------ */
export function outCubic(t, b, c, d) {
	return c*((t=t/d-1)*t*t + 1) + b;
}

/*
------------------------------------------
| inOutCubic:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on inOutCubic.
------------------------------------------ */
export function inOutCubic(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;
}

/*
------------------------------------------
| inQuart:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on inQuart.
------------------------------------------ */
export function inQuart(t, b, c, d) {
	return c*(t/=d)*t*t*t + b;
}

/*
------------------------------------------
| outQuart:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on outQuart.
------------------------------------------ */
export function outQuart(t, b, c, d) {
	return -c * ((t=t/d-1)*t*t*t - 1) + b;
}

/*
------------------------------------------
| inOutQuart:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on inOutQuart.
------------------------------------------ */
export function inOutQuart(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;
}

/*
------------------------------------------
| inQuint:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on inQuint.
------------------------------------------ */
export function inQuint(t, b, c, d) {
	return c*(t/=d)*t*t*t*t + b;
}

/*
------------------------------------------
| outQuint:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on outQuint.
------------------------------------------ */
export function outQuint(t, b, c, d) {
	return c*((t=t/d-1)*t*t*t*t + 1) + b;
}

/*
------------------------------------------
| inOutQuint:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on inOutQuint.
------------------------------------------ */
export function inOutQuint(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;
}

/*
------------------------------------------
| inSine:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on inSine.
------------------------------------------ */
export function inSine(t, b, c, d) {
	return -c * Math.cos(t/d * (Math.PI/2)) + c + b;
}

/*
------------------------------------------
| outSine:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on outSine.
------------------------------------------ */
export function outSine(t, b, c, d) {
	return c * Math.sin(t/d * (Math.PI/2)) + b;
}

/*
------------------------------------------
| inOutSine:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on inOutSine.
------------------------------------------ */
export function inOutSine(t, b, c, d) {
	return -c/2 * (Math.cos(Math.PI*t/d) - 1) + b;
}

/*
------------------------------------------
| inExpo:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on inExpo.
------------------------------------------ */
export function inExpo(t, b, c, d) {
	return (t==0) ? b : c * Math.pow(2, 10 * (t/d - 1)) + b;
}

/*
------------------------------------------
| outExpo:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on outExpo.
------------------------------------------ */
export function outExpo(t, b, c, d) {
	return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
}

/*
------------------------------------------
| inOutExpo:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on inOutExpo.
------------------------------------------ */
export function inOutExpo(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;
}

/*
------------------------------------------
| inCirc:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on inCirc.
------------------------------------------ */
export function inCirc(t, b, c, d) {
	return -c * (Math.sqrt(1 - (t/=d)*t) - 1) + b;
}

/*
------------------------------------------
| outCirc:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on outCirc.
------------------------------------------ */
export function outCirc(t, b, c, d) {
	return c * Math.sqrt(1 - (t=t/d-1)*t) + b;
}

/*
------------------------------------------
| inOutCirc:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on inOutCirc.
------------------------------------------ */
export function inOutCirc(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;
}

/*
------------------------------------------
| inElastic:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on inElastic.
------------------------------------------ */
export function inElastic(t, b, c, d) {
	let s=1.70158;let p=0;let a=c;
	if (t==0) return b;  if ((t/=d)==1) return b+c;  if (!p) p=d*.3;
	if (a < Math.abs(c)) { a=c; let s=p/4; }
	else 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;
}

/*
------------------------------------------
| outElastic:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on outElastic.
------------------------------------------ */
export function outElastic(t, b, c, d) {
	let s=1.70158;let p=0;let a=c;
	if (t==0) return b;  if ((t/=d)==1) return b+c;  if (!p) p=d*.3;
	if (a < Math.abs(c)) { a=c; let s=p/4; }
	else 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;
}

/*
------------------------------------------
| inOutElastic:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
|
| Get an eased float value based on inOutElastic.
------------------------------------------ */
export function inOutElastic(t, b, c, d) {
	let s=1.70158;let p=0;let a=c;
	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; let s=p/4; }
	else 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;
}

/*
------------------------------------------
| inBack:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
| s:number - strength
|
| Get an eased float value based on inBack.
------------------------------------------ */
export function inBack(t, b, c, d, s) {
	if (s == undefined) s = 1.70158;
	return c*(t/=d)*t*((s+1)*t - s) + b;
}

/*
------------------------------------------
| outBack:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
| s:number - strength
|
| Get an eased float value based on outBack.
------------------------------------------ */
export function outBack(t, b, c, d, s) {
	if (s == undefined) s = 1.70158;
	return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
}

/*
------------------------------------------
| inOutBack:float - returns eased float value
|
| t:number - current time
| b:number - beginning value
| c:number - change in value
| d:number - duration
| s:number - strength
|
| Get an eased float value based on inOutBack.
------------------------------------------ */
export function inOutBack(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;
}