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