'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var tslib = require('tslib');
var heyListen = require('hey-listen');
var styleValueTypes = require('style-value-types');
var sync = require('framesync');

function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }

var sync__default = /*#__PURE__*/_interopDefaultLegacy(sync);

const clamp = (min, max, v) => Math.min(Math.max(v, min), max);

const safeMin = 0.001;
const minDuration = 0.01;
const maxDuration = 10.0;
const minDamping = 0.05;
const maxDamping = 1;
function findSpring({ duration = 800, bounce = 0.25, velocity = 0, mass = 1, }) {
    let envelope;
    let derivative;
    heyListen.warning(duration <= maxDuration * 1000, "Spring duration must be 10 seconds or less");
    let dampingRatio = 1 - bounce;
    dampingRatio = clamp(minDamping, maxDamping, dampingRatio);
    duration = clamp(minDuration, maxDuration, duration / 1000);
    if (dampingRatio < 1) {
        envelope = (undampedFreq) => {
            const exponentialDecay = undampedFreq * dampingRatio;
            const delta = exponentialDecay * duration;
            const a = exponentialDecay - velocity;
            const b = calcAngularFreq(undampedFreq, dampingRatio);
            const c = Math.exp(-delta);
            return safeMin - (a / b) * c;
        };
        derivative = (undampedFreq) => {
            const exponentialDecay = undampedFreq * dampingRatio;
            const delta = exponentialDecay * duration;
            const d = delta * velocity + velocity;
            const e = Math.pow(dampingRatio, 2) * Math.pow(undampedFreq, 2) * duration;
            const f = Math.exp(-delta);
            const g = calcAngularFreq(Math.pow(undampedFreq, 2), dampingRatio);
            const factor = -envelope(undampedFreq) + safeMin > 0 ? -1 : 1;
            return (factor * ((d - e) * f)) / g;
        };
    }
    else {
        envelope = (undampedFreq) => {
            const a = Math.exp(-undampedFreq * duration);
            const b = (undampedFreq - velocity) * duration + 1;
            return -safeMin + a * b;
        };
        derivative = (undampedFreq) => {
            const a = Math.exp(-undampedFreq * duration);
            const b = (velocity - undampedFreq) * (duration * duration);
            return a * b;
        };
    }
    const initialGuess = 5 / duration;
    const undampedFreq = approximateRoot(envelope, derivative, initialGuess);
    duration = duration * 1000;
    if (isNaN(undampedFreq)) {
        return {
            stiffness: 100,
            damping: 10,
            duration,
        };
    }
    else {
        const stiffness = Math.pow(undampedFreq, 2) * mass;
        return {
            stiffness,
            damping: dampingRatio * 2 * Math.sqrt(mass * stiffness),
            duration,
        };
    }
}
const rootIterations = 12;
function approximateRoot(envelope, derivative, initialGuess) {
    let result = initialGuess;
    for (let i = 1; i < rootIterations; i++) {
        result = result - envelope(result) / derivative(result);
    }
    return result;
}
function calcAngularFreq(undampedFreq, dampingRatio) {
    return undampedFreq * Math.sqrt(1 - dampingRatio * dampingRatio);
}

const durationKeys = ["duration", "bounce"];
const physicsKeys = ["stiffness", "damping", "mass"];
function isSpringType(options, keys) {
    return keys.some((key) => options[key] !== undefined);
}
function getSpringOptions(options) {
    let springOptions = Object.assign({ velocity: 0.0, stiffness: 100, damping: 10, mass: 1.0, isResolvedFromDuration: false }, options);
    if (!isSpringType(options, physicsKeys) &&
        isSpringType(options, durationKeys)) {
        const derived = findSpring(options);
        springOptions = Object.assign(Object.assign(Object.assign({}, springOptions), derived), { velocity: 0.0, mass: 1.0 });
        springOptions.isResolvedFromDuration = true;
    }
    return springOptions;
}
function spring(_a) {
    var { from = 0.0, to = 1.0, restSpeed = 2, restDelta } = _a, options = tslib.__rest(_a, ["from", "to", "restSpeed", "restDelta"]);
    const state = { done: false, value: from };
    let { stiffness, damping, mass, velocity, duration, isResolvedFromDuration, } = getSpringOptions(options);
    let resolveSpring = zero;
    let resolveVelocity = zero;
    function createSpring() {
        const initialVelocity = velocity ? -(velocity / 1000) : 0.0;
        const initialDelta = to - from;
        const dampingRatio = damping / (2 * Math.sqrt(stiffness * mass));
        const undampedAngularFreq = Math.sqrt(stiffness / mass) / 1000;
        if (restDelta === undefined) {
            restDelta = Math.min(Math.abs(to - from) / 100, 0.4);
        }
        if (dampingRatio < 1) {
            const angularFreq = calcAngularFreq(undampedAngularFreq, dampingRatio);
            resolveSpring = (t) => {
                const envelope = Math.exp(-dampingRatio * undampedAngularFreq * t);
                return (to -
                    envelope *
                        (((initialVelocity +
                            dampingRatio * undampedAngularFreq * initialDelta) /
                            angularFreq) *
                            Math.sin(angularFreq * t) +
                            initialDelta * Math.cos(angularFreq * t)));
            };
            resolveVelocity = (t) => {
                const envelope = Math.exp(-dampingRatio * undampedAngularFreq * t);
                return (dampingRatio *
                    undampedAngularFreq *
                    envelope *
                    ((Math.sin(angularFreq * t) *
                        (initialVelocity +
                            dampingRatio *
                                undampedAngularFreq *
                                initialDelta)) /
                        angularFreq +
                        initialDelta * Math.cos(angularFreq * t)) -
                    envelope *
                        (Math.cos(angularFreq * t) *
                            (initialVelocity +
                                dampingRatio *
                                    undampedAngularFreq *
                                    initialDelta) -
                            angularFreq *
                                initialDelta *
                                Math.sin(angularFreq * t)));
            };
        }
        else if (dampingRatio === 1) {
            resolveSpring = (t) => to -
                Math.exp(-undampedAngularFreq * t) *
                    (initialDelta +
                        (initialVelocity + undampedAngularFreq * initialDelta) *
                            t);
        }
        else {
            const dampedAngularFreq = undampedAngularFreq * Math.sqrt(dampingRatio * dampingRatio - 1);
            resolveSpring = (t) => {
                const envelope = Math.exp(-dampingRatio * undampedAngularFreq * t);
                const freqForT = Math.min(dampedAngularFreq * t, 300);
                return (to -
                    (envelope *
                        ((initialVelocity +
                            dampingRatio * undampedAngularFreq * initialDelta) *
                            Math.sinh(freqForT) +
                            dampedAngularFreq *
                                initialDelta *
                                Math.cosh(freqForT))) /
                        dampedAngularFreq);
            };
        }
    }
    createSpring();
    return {
        next: (t) => {
            const current = resolveSpring(t);
            if (!isResolvedFromDuration) {
                const currentVelocity = resolveVelocity(t) * 1000;
                const isBelowVelocityThreshold = Math.abs(currentVelocity) <= restSpeed;
                const isBelowDisplacementThreshold = Math.abs(to - current) <= restDelta;
                state.done =
                    isBelowVelocityThreshold && isBelowDisplacementThreshold;
            }
            else {
                state.done = t >= duration;
            }
            state.value = state.done ? to : current;
            return state;
        },
        flipTarget: () => {
            velocity = -velocity;
            [from, to] = [to, from];
            createSpring();
        },
    };
}
spring.needsInterpolation = (a, b) => typeof a === "string" || typeof b === "string";
const zero = (_t) => 0;

const progress = (from, to, value) => {
    const toFromDifference = to - from;
    return toFromDifference === 0 ? 1 : (value - from) / toFromDifference;
};

const mix = (from, to, progress) => -progress * from + progress * to + from;

function hueToRgb(p, q, t) {
    if (t < 0)
        t += 1;
    if (t > 1)
        t -= 1;
    if (t < 1 / 6)
        return p + (q - p) * 6 * t;
    if (t < 1 / 2)
        return q;
    if (t < 2 / 3)
        return p + (q - p) * (2 / 3 - t) * 6;
    return p;
}
function hslaToRgba({ hue, saturation, lightness, alpha }) {
    hue /= 360;
    saturation /= 100;
    lightness /= 100;
    let red = 0;
    let green = 0;
    let blue = 0;
    if (!saturation) {
        red = green = blue = lightness;
    }
    else {
        const q = lightness < 0.5
            ? lightness * (1 + saturation)
            : lightness + saturation - lightness * saturation;
        const p = 2 * lightness - q;
        red = hueToRgb(p, q, hue + 1 / 3);
        green = hueToRgb(p, q, hue);
        blue = hueToRgb(p, q, hue - 1 / 3);
    }
    return {
        red: Math.round(red * 255),
        green: Math.round(green * 255),
        blue: Math.round(blue * 255),
        alpha,
    };
}

const mixLinearColor = (from, to, v) => {
    const fromExpo = from * from;
    const toExpo = to * to;
    return Math.sqrt(Math.max(0, v * (toExpo - fromExpo) + fromExpo));
};
const colorTypes = [styleValueTypes.hex, styleValueTypes.rgba, styleValueTypes.hsla];
const getColorType = (v) => colorTypes.find((type) => type.test(v));
const notAnimatable = (color) => `'${color}' is not an animatable color. Use the equivalent color code instead.`;
const mixColor = (from, to) => {
    let fromColorType = getColorType(from);
    let toColorType = getColorType(to);
    heyListen.invariant(!!fromColorType, notAnimatable(from));
    heyListen.invariant(!!toColorType, notAnimatable(to));
    let fromColor = fromColorType.parse(from);
    let toColor = toColorType.parse(to);
    if (fromColorType === styleValueTypes.hsla) {
        fromColor = hslaToRgba(fromColor);
        fromColorType = styleValueTypes.rgba;
    }
    if (toColorType === styleValueTypes.hsla) {
        toColor = hslaToRgba(toColor);
        toColorType = styleValueTypes.rgba;
    }
    const blended = Object.assign({}, fromColor);
    return (v) => {
        for (const key in blended) {
            if (key !== "alpha") {
                blended[key] = mixLinearColor(fromColor[key], toColor[key], v);
            }
        }
        blended.alpha = mix(fromColor.alpha, toColor.alpha, v);
        return fromColorType.transform(blended);
    };
};

const zeroPoint = {
    x: 0,
    y: 0,
    z: 0
};
const isNum = (v) => typeof v === 'number';

const combineFunctions = (a, b) => (v) => b(a(v));
const pipe = (...transformers) => transformers.reduce(combineFunctions);

function getMixer(origin, target) {
    if (isNum(origin)) {
        return (v) => mix(origin, target, v);
    }
    else if (styleValueTypes.color.test(origin)) {
        return mixColor(origin, target);
    }
    else {
        return mixComplex(origin, target);
    }
}
const mixArray = (from, to) => {
    const output = [...from];
    const numValues = output.length;
    const blendValue = from.map((fromThis, i) => getMixer(fromThis, to[i]));
    return (v) => {
        for (let i = 0; i < numValues; i++) {
            output[i] = blendValue[i](v);
        }
        return output;
    };
};
const mixObject = (origin, target) => {
    const output = Object.assign(Object.assign({}, origin), target);
    const blendValue = {};
    for (const key in output) {
        if (origin[key] !== undefined && target[key] !== undefined) {
            blendValue[key] = getMixer(origin[key], target[key]);
        }
    }
    return (v) => {
        for (const key in blendValue) {
            output[key] = blendValue[key](v);
        }
        return output;
    };
};
function analyse(value) {
    const parsed = styleValueTypes.complex.parse(value);
    const numValues = parsed.length;
    let numNumbers = 0;
    let numRGB = 0;
    let numHSL = 0;
    for (let i = 0; i < numValues; i++) {
        if (numNumbers || typeof parsed[i] === "number") {
            numNumbers++;
        }
        else {
            if (parsed[i].hue !== undefined) {
                numHSL++;
            }
            else {
                numRGB++;
            }
        }
    }
    return { parsed, numNumbers, numRGB, numHSL };
}
const mixComplex = (origin, target) => {
    const template = styleValueTypes.complex.createTransformer(target);
    const originStats = analyse(origin);
    const targetStats = analyse(target);
    const canInterpolate = originStats.numHSL === targetStats.numHSL &&
        originStats.numRGB === targetStats.numRGB &&
        originStats.numNumbers >= targetStats.numNumbers;
    if (canInterpolate) {
        return pipe(mixArray(originStats.parsed, targetStats.parsed), template);
    }
    else {
        heyListen.warning(true, `Complex values '${origin}' and '${target}' too different to mix. Ensure all colors are of the same type, and that each contains the same quantity of number and color values. Falling back to instant transition.`);
        return (p) => `${p > 0 ? target : origin}`;
    }
};

const mixNumber = (from, to) => (p) => mix(from, to, p);
function detectMixerFactory(v) {
    if (typeof v === 'number') {
        return mixNumber;
    }
    else if (typeof v === 'string') {
        if (styleValueTypes.color.test(v)) {
            return mixColor;
        }
        else {
            return mixComplex;
        }
    }
    else if (Array.isArray(v)) {
        return mixArray;
    }
    else if (typeof v === 'object') {
        return mixObject;
    }
}
function createMixers(output, ease, customMixer) {
    const mixers = [];
    const mixerFactory = customMixer || detectMixerFactory(output[0]);
    const numMixers = output.length - 1;
    for (let i = 0; i < numMixers; i++) {
        let mixer = mixerFactory(output[i], output[i + 1]);
        if (ease) {
            const easingFunction = Array.isArray(ease) ? ease[i] : ease;
            mixer = pipe(easingFunction, mixer);
        }
        mixers.push(mixer);
    }
    return mixers;
}
function fastInterpolate([from, to], [mixer]) {
    return (v) => mixer(progress(from, to, v));
}
function slowInterpolate(input, mixers) {
    const inputLength = input.length;
    const lastInputIndex = inputLength - 1;
    return (v) => {
        let mixerIndex = 0;
        let foundMixerIndex = false;
        if (v <= input[0]) {
            foundMixerIndex = true;
        }
        else if (v >= input[lastInputIndex]) {
            mixerIndex = lastInputIndex - 1;
            foundMixerIndex = true;
        }
        if (!foundMixerIndex) {
            let i = 1;
            for (; i < inputLength; i++) {
                if (input[i] > v || i === lastInputIndex) {
                    break;
                }
            }
            mixerIndex = i - 1;
        }
        const progressInRange = progress(input[mixerIndex], input[mixerIndex + 1], v);
        return mixers[mixerIndex](progressInRange);
    };
}
function interpolate(input, output, { clamp: isClamp = true, ease, mixer } = {}) {
    const inputLength = input.length;
    heyListen.invariant(inputLength === output.length, 'Both input and output ranges must be the same length');
    heyListen.invariant(!ease || !Array.isArray(ease) || ease.length === inputLength - 1, 'Array of easing functions must be of length `input.length - 1`, as it applies to the transitions **between** the defined values.');
    if (input[0] > input[inputLength - 1]) {
        input = [].concat(input);
        output = [].concat(output);
        input.reverse();
        output.reverse();
    }
    const mixers = createMixers(output, ease, mixer);
    const interpolator = inputLength === 2
        ? fastInterpolate(input, mixers)
        : slowInterpolate(input, mixers);
    return isClamp
        ? (v) => interpolator(clamp(input[0], input[inputLength - 1], v))
        : interpolator;
}

const reverseEasing = easing => p => 1 - easing(1 - p);
const mirrorEasing = easing => p => p <= 0.5 ? easing(2 * p) / 2 : (2 - easing(2 * (1 - p))) / 2;
const createExpoIn = (power) => p => Math.pow(p, power);
const createBackIn = (power) => p => p * p * ((power + 1) * p - power);
const createAnticipate = (power) => {
    const backEasing = createBackIn(power);
    return p => (p *= 2) < 1
        ? 0.5 * backEasing(p)
        : 0.5 * (2 - Math.pow(2, -10 * (p - 1)));
};

const DEFAULT_OVERSHOOT_STRENGTH = 1.525;
const BOUNCE_FIRST_THRESHOLD = 4.0 / 11.0;
const BOUNCE_SECOND_THRESHOLD = 8.0 / 11.0;
const BOUNCE_THIRD_THRESHOLD = 9.0 / 10.0;
const linear = p => p;
const easeIn = createExpoIn(2);
const easeOut = reverseEasing(easeIn);
const easeInOut = mirrorEasing(easeIn);
const circIn = p => 1 - Math.sin(Math.acos(p));
const circOut = reverseEasing(circIn);
const circInOut = mirrorEasing(circOut);
const backIn = createBackIn(DEFAULT_OVERSHOOT_STRENGTH);
const backOut = reverseEasing(backIn);
const backInOut = mirrorEasing(backIn);
const anticipate = createAnticipate(DEFAULT_OVERSHOOT_STRENGTH);
const ca = 4356.0 / 361.0;
const cb = 35442.0 / 1805.0;
const cc = 16061.0 / 1805.0;
const bounceOut = (p) => {
    if (p === 1 || p === 0)
        return p;
    const p2 = p * p;
    return p < BOUNCE_FIRST_THRESHOLD
        ? 7.5625 * p2
        : p < BOUNCE_SECOND_THRESHOLD
            ? 9.075 * p2 - 9.9 * p + 3.4
            : p < BOUNCE_THIRD_THRESHOLD
                ? ca * p2 - cb * p + cc
                : 10.8 * p * p - 20.52 * p + 10.72;
};
const bounceIn = reverseEasing(bounceOut);
const bounceInOut = (p) => p < 0.5
    ? 0.5 * (1.0 - bounceOut(1.0 - p * 2.0))
    : 0.5 * bounceOut(p * 2.0 - 1.0) + 0.5;

function defaultEasing(values, easing) {
    return values.map(() => easing || easeInOut).splice(0, values.length - 1);
}
function defaultOffset(values) {
    const numValues = values.length;
    return values.map((_value, i) => i !== 0 ? i / (numValues - 1) : 0);
}
function convertOffsetToTimes(offset, duration) {
    return offset.map((o) => o * duration);
}
function keyframes({ from = 0, to = 1, ease, offset, duration = 300, }) {
    const state = { done: false, value: from };
    const values = Array.isArray(to) ? to : [from, to];
    const times = convertOffsetToTimes(offset && offset.length === values.length
        ? offset
        : defaultOffset(values), duration);
    function createInterpolator() {
        return interpolate(times, values, {
            ease: Array.isArray(ease) ? ease : defaultEasing(values, ease),
        });
    }
    let interpolator = createInterpolator();
    return {
        next: (t) => {
            state.value = interpolator(t);
            state.done = t >= duration;
            return state;
        },
        flipTarget: () => {
            values.reverse();
            interpolator = createInterpolator();
        },
    };
}

function decay({ velocity = 0, from = 0, power = 0.8, timeConstant = 350, restDelta = 0.5, modifyTarget, }) {
    const state = { done: false, value: from };
    let amplitude = power * velocity;
    const ideal = from + amplitude;
    const target = modifyTarget === undefined ? ideal : modifyTarget(ideal);
    if (target !== ideal)
        amplitude = target - from;
    return {
        next: (t) => {
            const delta = -amplitude * Math.exp(-t / timeConstant);
            state.done = !(delta > restDelta || delta < -restDelta);
            state.value = state.done ? target : target + delta;
            return state;
        },
        flipTarget: () => { },
    };
}

const types = { keyframes, spring, decay };
function detectAnimationFromOptions(config) {
    if (Array.isArray(config.to)) {
        return keyframes;
    }
    else if (types[config.type]) {
        return types[config.type];
    }
    const keys = new Set(Object.keys(config));
    if (keys.has("ease") ||
        (keys.has("duration") && !keys.has("dampingRatio"))) {
        return keyframes;
    }
    else if (keys.has("dampingRatio") ||
        keys.has("stiffness") ||
        keys.has("mass") ||
        keys.has("damping") ||
        keys.has("restSpeed") ||
        keys.has("restDelta")) {
        return spring;
    }
    return keyframes;
}

function loopElapsed(elapsed, duration, delay = 0) {
    return elapsed - duration - delay;
}
function reverseElapsed(elapsed, duration, delay = 0, isForwardPlayback = true) {
    return isForwardPlayback
        ? loopElapsed(duration + -elapsed, duration, delay)
        : duration - (elapsed - duration) + delay;
}
function hasRepeatDelayElapsed(elapsed, duration, delay, isForwardPlayback) {
    return isForwardPlayback ? elapsed >= duration + delay : elapsed <= -delay;
}

const framesync = (update) => {
    const passTimestamp = ({ delta }) => update(delta);
    return {
        start: () => sync__default['default'].update(passTimestamp, true),
        stop: () => sync.cancelSync.update(passTimestamp),
    };
};
function animate(_a) {
    var _b, _c;
    var { from, autoplay = true, driver = framesync, elapsed = 0, repeat: repeatMax = 0, repeatType = "loop", repeatDelay = 0, onPlay, onStop, onComplete, onRepeat, onUpdate } = _a, options = tslib.__rest(_a, ["from", "autoplay", "driver", "elapsed", "repeat", "repeatType", "repeatDelay", "onPlay", "onStop", "onComplete", "onRepeat", "onUpdate"]);
    let { to } = options;
    let driverControls;
    let repeatCount = 0;
    let computedDuration = options.duration;
    let latest;
    let isComplete = false;
    let isForwardPlayback = true;
    let interpolateFromNumber;
    const animator = detectAnimationFromOptions(options);
    if ((_c = (_b = animator).needsInterpolation) === null || _c === void 0 ? void 0 : _c.call(_b, from, to)) {
        interpolateFromNumber = interpolate([0, 100], [from, to], {
            clamp: false,
        });
        from = 0;
        to = 100;
    }
    const animation = animator(Object.assign(Object.assign({}, options), { from, to }));
    function repeat() {
        repeatCount++;
        if (repeatType === "reverse") {
            isForwardPlayback = repeatCount % 2 === 0;
            elapsed = reverseElapsed(elapsed, computedDuration, repeatDelay, isForwardPlayback);
        }
        else {
            elapsed = loopElapsed(elapsed, computedDuration, repeatDelay);
            if (repeatType === "mirror")
                animation.flipTarget();
        }
        isComplete = false;
        onRepeat && onRepeat();
    }
    function complete() {
        driverControls.stop();
        onComplete && onComplete();
    }
    function update(delta) {
        if (!isForwardPlayback)
            delta = -delta;
        elapsed += delta;
        if (!isComplete) {
            const state = animation.next(Math.max(0, elapsed));
            latest = state.value;
            if (interpolateFromNumber)
                latest = interpolateFromNumber(latest);
            isComplete = isForwardPlayback ? state.done : elapsed <= 0;
        }
        onUpdate === null || onUpdate === void 0 ? void 0 : onUpdate(latest);
        if (isComplete) {
            if (repeatCount === 0)
                computedDuration !== null && computedDuration !== void 0 ? computedDuration : (computedDuration = elapsed);
            if (repeatCount < repeatMax) {
                hasRepeatDelayElapsed(elapsed, computedDuration, repeatDelay, isForwardPlayback) && repeat();
            }
            else {
                complete();
            }
        }
    }
    function play() {
        onPlay === null || onPlay === void 0 ? void 0 : onPlay();
        driverControls = driver(update);
        driverControls.start();
    }
    autoplay && play();
    return {
        stop: () => {
            onStop === null || onStop === void 0 ? void 0 : onStop();
            driverControls.stop();
        },
    };
}

function velocityPerSecond(velocity, frameDuration) {
    return frameDuration ? velocity * (1000 / frameDuration) : 0;
}

function inertia({ from = 0, velocity = 0, min, max, power = 0.8, timeConstant = 750, bounceStiffness = 500, bounceDamping = 10, restDelta = 1, modifyTarget, driver, onUpdate, onComplete, onStop, }) {
    let currentAnimation;
    function isOutOfBounds(v) {
        return (min !== undefined && v < min) || (max !== undefined && v > max);
    }
    function boundaryNearest(v) {
        if (min === undefined)
            return max;
        if (max === undefined)
            return min;
        return Math.abs(min - v) < Math.abs(max - v) ? min : max;
    }
    function startAnimation(options) {
        currentAnimation === null || currentAnimation === void 0 ? void 0 : currentAnimation.stop();
        currentAnimation = animate(Object.assign(Object.assign({}, options), { driver, onUpdate: (v) => {
                var _a;
                onUpdate === null || onUpdate === void 0 ? void 0 : onUpdate(v);
                (_a = options.onUpdate) === null || _a === void 0 ? void 0 : _a.call(options, v);
            }, onComplete,
            onStop }));
    }
    function startSpring(options) {
        startAnimation(Object.assign({ type: "spring", stiffness: bounceStiffness, damping: bounceDamping, restDelta }, options));
    }
    if (isOutOfBounds(from)) {
        startSpring({ from, velocity, to: boundaryNearest(from) });
    }
    else {
        let target = power * velocity + from;
        if (typeof modifyTarget !== "undefined")
            target = modifyTarget(target);
        const boundary = boundaryNearest(target);
        const heading = boundary === min ? -1 : 1;
        let prev;
        let current;
        const checkBoundary = (v) => {
            prev = current;
            current = v;
            velocity = velocityPerSecond(v - prev, sync.getFrameData().delta);
            if ((heading === 1 && v > boundary) ||
                (heading === -1 && v < boundary)) {
                startSpring({ from: v, to: boundary, velocity });
            }
        };
        startAnimation({
            type: "decay",
            from,
            velocity,
            timeConstant,
            power,
            restDelta,
            modifyTarget,
            onUpdate: isOutOfBounds(target) ? checkBoundary : undefined,
        });
    }
    return {
        stop: () => currentAnimation === null || currentAnimation === void 0 ? void 0 : currentAnimation.stop(),
    };
}

const radiansToDegrees = (radians) => (radians * 180) / Math.PI;

const angle = (a, b = zeroPoint) => radiansToDegrees(Math.atan2(b.y - a.y, b.x - a.x));

const applyOffset = (from, to) => {
    let hasReceivedFrom = true;
    if (to === undefined) {
        to = from;
        hasReceivedFrom = false;
    }
    return (v) => {
        if (hasReceivedFrom) {
            return v - from + to;
        }
        else {
            from = v;
            hasReceivedFrom = true;
            return to;
        }
    };
};

const identity = (v) => v;
const createAttractor = (alterDisplacement = identity) => (constant, origin, v) => {
    const displacement = origin - v;
    const springModifiedDisplacement = -(0 - constant + 1) * (0 - alterDisplacement(Math.abs(displacement)));
    return displacement <= 0
        ? origin + springModifiedDisplacement
        : origin - springModifiedDisplacement;
};
const attract = createAttractor();
const attractExpo = createAttractor(Math.sqrt);

const degreesToRadians = (degrees) => (degrees * Math.PI) / 180;

const isPoint = (point) => point.hasOwnProperty('x') && point.hasOwnProperty('y');

const isPoint3D = (point) => isPoint(point) && point.hasOwnProperty('z');

const distance1D = (a, b) => Math.abs(a - b);
function distance(a, b) {
    if (isNum(a) && isNum(b)) {
        return distance1D(a, b);
    }
    else if (isPoint(a) && isPoint(b)) {
        const xDelta = distance1D(a.x, b.x);
        const yDelta = distance1D(a.y, b.y);
        const zDelta = isPoint3D(a) && isPoint3D(b) ? distance1D(a.z, b.z) : 0;
        return Math.sqrt(Math.pow(xDelta, 2) + Math.pow(yDelta, 2) + Math.pow(zDelta, 2));
    }
}

const pointFromVector = (origin, angle, distance) => {
    angle = degreesToRadians(angle);
    return {
        x: distance * Math.cos(angle) + origin.x,
        y: distance * Math.sin(angle) + origin.y
    };
};

const toDecimal = (num, precision = 2) => {
    precision = Math.pow(10, precision);
    return Math.round(num * precision) / precision;
};

const smoothFrame = (prevValue, nextValue, duration, smoothing = 0) => toDecimal(prevValue +
    (duration * (nextValue - prevValue)) / Math.max(smoothing, duration));

const smooth = (strength = 50) => {
    let previousValue = 0;
    let lastUpdated = 0;
    return (v) => {
        const currentFramestamp = sync.getFrameData().timestamp;
        const timeDelta = currentFramestamp !== lastUpdated ? currentFramestamp - lastUpdated : 0;
        const newValue = timeDelta
            ? smoothFrame(previousValue, v, timeDelta, strength)
            : previousValue;
        lastUpdated = currentFramestamp;
        previousValue = newValue;
        return newValue;
    };
};

const snap = (points) => {
    if (typeof points === 'number') {
        return (v) => Math.round(v / points) * points;
    }
    else {
        let i = 0;
        const numPoints = points.length;
        return (v) => {
            let lastDistance = Math.abs(points[0] - v);
            for (i = 1; i < numPoints; i++) {
                const point = points[i];
                const distance = Math.abs(point - v);
                if (distance === 0)
                    return point;
                if (distance > lastDistance)
                    return points[i - 1];
                if (i === numPoints - 1)
                    return point;
                lastDistance = distance;
            }
        };
    }
};

function velocityPerFrame(xps, frameDuration) {
    return xps / (1000 / frameDuration);
}

const wrap = (min, max, v) => {
    const rangeSize = max - min;
    return ((((v - min) % rangeSize) + rangeSize) % rangeSize) + min;
};

const a = (a1, a2) => 1.0 - 3.0 * a2 + 3.0 * a1;
const b = (a1, a2) => 3.0 * a2 - 6.0 * a1;
const c = (a1) => 3.0 * a1;
const calcBezier = (t, a1, a2) => ((a(a1, a2) * t + b(a1, a2)) * t + c(a1)) * t;
const getSlope = (t, a1, a2) => 3.0 * a(a1, a2) * t * t + 2.0 * b(a1, a2) * t + c(a1);
const subdivisionPrecision = 0.0000001;
const subdivisionMaxIterations = 10;
function binarySubdivide(aX, aA, aB, mX1, mX2) {
    let currentX;
    let currentT;
    let i = 0;
    do {
        currentT = aA + (aB - aA) / 2.0;
        currentX = calcBezier(currentT, mX1, mX2) - aX;
        if (currentX > 0.0) {
            aB = currentT;
        }
        else {
            aA = currentT;
        }
    } while (Math.abs(currentX) > subdivisionPrecision &&
        ++i < subdivisionMaxIterations);
    return currentT;
}
const newtonIterations = 8;
const newtonMinSlope = 0.001;
function newtonRaphsonIterate(aX, aGuessT, mX1, mX2) {
    for (let i = 0; i < newtonIterations; ++i) {
        const currentSlope = getSlope(aGuessT, mX1, mX2);
        if (currentSlope === 0.0) {
            return aGuessT;
        }
        const currentX = calcBezier(aGuessT, mX1, mX2) - aX;
        aGuessT -= currentX / currentSlope;
    }
    return aGuessT;
}
const kSplineTableSize = 11;
const kSampleStepSize = 1.0 / (kSplineTableSize - 1.0);
function cubicBezier(mX1, mY1, mX2, mY2) {
    if (mX1 === mY1 && mX2 === mY2)
        return linear;
    const sampleValues = new Float32Array(kSplineTableSize);
    for (let i = 0; i < kSplineTableSize; ++i) {
        sampleValues[i] = calcBezier(i * kSampleStepSize, mX1, mX2);
    }
    function getTForX(aX) {
        let intervalStart = 0.0;
        let currentSample = 1;
        const lastSample = kSplineTableSize - 1;
        for (; currentSample !== lastSample && sampleValues[currentSample] <= aX; ++currentSample) {
            intervalStart += kSampleStepSize;
        }
        --currentSample;
        const dist = (aX - sampleValues[currentSample]) /
            (sampleValues[currentSample + 1] - sampleValues[currentSample]);
        const guessForT = intervalStart + dist * kSampleStepSize;
        const initialSlope = getSlope(guessForT, mX1, mX2);
        if (initialSlope >= newtonMinSlope) {
            return newtonRaphsonIterate(aX, guessForT, mX1, mX2);
        }
        else if (initialSlope === 0.0) {
            return guessForT;
        }
        else {
            return binarySubdivide(aX, intervalStart, intervalStart + kSampleStepSize, mX1, mX2);
        }
    }
    return (t) => t === 0 || t === 1 ? t : calcBezier(getTForX(t), mY1, mY2);
}

const steps = (steps, direction = 'end') => (progress) => {
    progress =
        direction === 'end' ? Math.min(progress, 0.999) : Math.max(progress, 0.001);
    const expanded = progress * steps;
    const rounded = direction === 'end' ? Math.floor(expanded) : Math.ceil(expanded);
    return clamp(0, 1, rounded / steps);
};

exports.angle = angle;
exports.animate = animate;
exports.anticipate = anticipate;
exports.applyOffset = applyOffset;
exports.attract = attract;
exports.attractExpo = attractExpo;
exports.backIn = backIn;
exports.backInOut = backInOut;
exports.backOut = backOut;
exports.bounceIn = bounceIn;
exports.bounceInOut = bounceInOut;
exports.bounceOut = bounceOut;
exports.circIn = circIn;
exports.circInOut = circInOut;
exports.circOut = circOut;
exports.clamp = clamp;
exports.createAnticipate = createAnticipate;
exports.createAttractor = createAttractor;
exports.createBackIn = createBackIn;
exports.createExpoIn = createExpoIn;
exports.cubicBezier = cubicBezier;
exports.decay = decay;
exports.degreesToRadians = degreesToRadians;
exports.distance = distance;
exports.easeIn = easeIn;
exports.easeInOut = easeInOut;
exports.easeOut = easeOut;
exports.inertia = inertia;
exports.interpolate = interpolate;
exports.isPoint = isPoint;
exports.isPoint3D = isPoint3D;
exports.keyframes = keyframes;
exports.linear = linear;
exports.mirrorEasing = mirrorEasing;
exports.mix = mix;
exports.mixColor = mixColor;
exports.mixComplex = mixComplex;
exports.pipe = pipe;
exports.pointFromVector = pointFromVector;
exports.progress = progress;
exports.radiansToDegrees = radiansToDegrees;
exports.reverseEasing = reverseEasing;
exports.smooth = smooth;
exports.smoothFrame = smoothFrame;
exports.snap = snap;
exports.spring = spring;
exports.steps = steps;
exports.toDecimal = toDecimal;
exports.velocityPerFrame = velocityPerFrame;
exports.velocityPerSecond = velocityPerSecond;
exports.wrap = wrap;