abtmtr-v4/views/projects/item/midsim/code/easing.js
2023-12-07 10:34:09 -06:00

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JavaScript

export var easings = { // Easings taken from https://easings.net/
linear: (x) => {
return x;
},
easeInSine: (x) => {
return 1 - Math.cos((x * Math.PI) / 2);
},
easeOutSine: (x) => {
return Math.sin((x * Math.PI) / 2);
},
easeInOutSine: (x) => {
return -(Math.cos(Math.PI * x) - 1) / 2;
},
easeInQuad: (x) => {
return x * x;
},
easeOutQuad: (x) => {
return 1 - (1 - x) * (1 - x);
},
easeInOutQuad: (x) => {
return x < 0.5 ? 2 * x * x : 1 - Math.pow(-2 * x + 2, 2) / 2;
},
easeInCubic: (x) => {
return x * x * x;
},
easeOutCubic: (x) => {
return 1 - Math.pow(1 - x, 3);
},
easeInOutCubic: (x) => {
return x < 0.5 ? 4 * x * x * x : 1 - Math.pow(-2 * x + 2, 3) / 2;
},
easeInQuart: (x) => {
return x * x * x * x;
},
easeOutQuart: (x) => {
return 1 - Math.pow(1 - x, 4);
},
easeInOutQuart: (x) => {
return x < 0.5 ? 8 * x * x * x * x : 1 - Math.pow(-2 * x + 2, 4) / 2;
},
easeInQuint: (x) => {
return x * x * x * x * x;
},
easeOutQuint: (x) => {
return 1 - Math.pow(1 - x, 5);
},
easeInOutQuint: (x) => {
return x < 0.5 ? 16 * x * x * x * x * x : 1 - Math.pow(-2 * x + 2, 5) / 2;
},
easeInExpo: (x) => {
return x === 0 ? 0 : Math.pow(2, 10 * x - 10);
},
easeOutExpo: (x) => {
return x === 1 ? 1 : 1 - Math.pow(2, -10 * x);
},
easeInOutExpo: (x) => {
return x === 0
? 0
: x === 1
? 1
: x < 0.5 ? Math.pow(2, 20 * x - 10) / 2
: (2 - Math.pow(2, -20 * x + 10)) / 2;
},
easeInCirc: (x) => {
return 1 - Math.sqrt(1 - Math.pow(x, 2));
},
easeOutCirc: (x) => {
return Math.sqrt(1 - Math.pow(x - 1, 2));
},
easeInOutCirc: (x) => {
return x < 0.5
? (1 - Math.sqrt(1 - Math.pow(2 * x, 2))) / 2
: (Math.sqrt(1 - Math.pow(-2 * x + 2, 2)) + 1) / 2;
},
easeInBack: (x) => {
const c1 = 1.70158;
const c3 = c1 + 1;
return c3 * x * x * x - c1 * x * x;
},
easeOutBack: (x) => {
const c1 = 1.70158;
const c3 = c1 + 1;
return 1 + c3 * Math.pow(x - 1, 3) + c1 * Math.pow(x - 1, 2);
},
easeInOutBack: (x) => {
const c1 = 1.70158;
const c2 = c1 * 1.525;
return x < 0.5
? (Math.pow(2 * x, 2) * ((c2 + 1) * 2 * x - c2)) / 2
: (Math.pow(2 * x - 2, 2) * ((c2 + 1) * (x * 2 - 2) + c2) + 2) / 2;
},
easeInBounce: (x) => {
return 1 - easings.easeOutBounce(1 - x);
},
easeOutBounce: (x) => {
const n1 = 7.5625;
const d1 = 2.75;
if (x < 1 / d1) {
return n1 * x * x;
} else if (x < 2 / d1) {
return n1 * (x -= 1.5 / d1) * x + 0.75;
} else if (x < 2.5 / d1) {
return n1 * (x -= 2.25 / d1) * x + 0.9375;
} else {
return n1 * (x -= 2.625 / d1) * x + 0.984375;
}
},
easeInOutBounce: (x) => {
return x < 0.5
? (1 - easings.easeOutBounce(1 - 2 * x)) / 2
: (1 + easings.easeOutBounce(2 * x - 1)) / 2;
}
}
export var tweentypes = {
FOREVER: (t, st, tl) => {
if (t - st >= tl) {
return "FOREVER";
}
return "CONTINUE";
},
LERPFOREVER: (t, st, tl) => {
return "LF";
},
PINGPONG: (t, st, tl) => {
if (t - st >= tl) {
return "PING";
}
return "CONTINUE";
},
NORMAL: (t, st, tl) => {
if (t - st >= tl) {
return "CALLBACK";
}
return "CONTINUE";
}
}
export function tween(func, attrs, timeLen, minVal, maxVal, ease, type, onFinish) {
var minVal = minVal != undefined ? minVal : func[attrs[0]];
var ease = ease != undefined ? ease : easings.linear;
var type = type != undefined ? type : tweentypes.NORMAL;
var stTime = time();
var onFinish = onFinish != undefined ? onFinish : "ud";
var upd = onUpdate(() => {
switch (type(time(), stTime, timeLen)) {
case "CALLBACK":
for (let h in attrs) {
func[attrs[h]] = maxVal;
}
upd();
return onFinish == "ud" ? true : onFinish();
case "FOREVER":
stTime = time();
break;
case "CONTINUE":
for (let h in attrs) {
func[attrs[h]] = minVal;
}
break;
case "PING":
var buffer = minVal;
minVal = maxVal;
maxVal = buffer;
stTime = time();
break;
default:
break;
}
for (let i in attrs) {
func[attrs[i]] = lerp(minVal, maxVal, ease((time() - stTime) / timeLen));
}
});
}