motion-and-tween/dist/tween/circular/EaseInOutCircularTween.js

Motion and Tween

var __extends = (this && this.__extends) || (function () {
    var extendStatics = function (d, b) {
        extendStatics = Object.setPrototypeOf ||
            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
        return extendStatics(d, b);
    };
    return function (d, b) {
        if (typeof b !== "function" && b !== null)
            throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
import Tween from "../Tween.js";
var EaseInOutCircularTween = /** @class */ (function (_super) {
    __extends(EaseInOutCircularTween, _super);
    function EaseInOutCircularTween(params) {
        return _super.call(this, params, "EaseInOutCircularTween") || this;
    }
    EaseInOutCircularTween.prototype.tweenAlgorithm = function (params) {
        var nextT = params.nextT, beginValue = params.beginValue, valueChange = params.valueChange, actionDuration = params.actionDuration;
        var timeStep = nextT / (actionDuration / 2);
        var newValue;
        if (timeStep <= 1) {
            // const timeStep = nextT / (actionDuration / 2);
            newValue =
                (valueChange / 2) * (1 - Math.sqrt(1 - Math.pow(timeStep, 2))) +
                    beginValue;
        }
        else {
            timeStep = timeStep - 2;
            newValue =
                (valueChange / 2) * Math.sqrt(1 - Math.pow(timeStep, 2)) +
                    (beginValue + valueChange / 2);
        }
        return newValue;
    };
    EaseInOutCircularTween.prototype.update = function (params) {
        if (params === void 0) { params = null; }
        return _super.prototype.update.call(this, params, this.tweenAlgorithm);
    };
    return EaseInOutCircularTween;
}(Tween));
export { EaseInOutCircularTween };
export default EaseInOutCircularTween;