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812 行
28 KiB
812 行
28 KiB
using System;
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using System.Collections.Generic;
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using System.Linq;
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using Unity.UIWidgets.foundation;
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using Unity.UIWidgets.ui;
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using UnityEngine;
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using Random = System.Random;
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namespace Unity.UIWidgets.animation {
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public abstract class ParametricCurve<T> {
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public virtual T transform(float t) {
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D.assert(t >= 0.0f && t <= 1.0f, () => $"parametric value {t} is outside of [0, 1] range.");
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return transformInternal(t);
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}
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protected virtual T transformInternal(float t) {
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throw new NotImplementedException();
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}
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public override string ToString() {
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return $"{GetType()}";
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}
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}
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public abstract class Curve : ParametricCurve<float> {
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public override float transform(float t) {
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if (t == 0.0f || t == 1.0f) {
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return t;
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}
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return base.transform(t);
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}
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public Curve flipped {
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get { return new FlippedCurve(this); }
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}
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}
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class _Linear : Curve {
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protected override float transformInternal(float t) {
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return t;
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}
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}
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public class SawTooth : Curve {
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public SawTooth(int count) {
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this.count = count;
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}
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public readonly int count;
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protected override float transformInternal(float t) {
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t *= count;
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return t - (int) t;
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}
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public override string ToString() {
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return $"{GetType()}({count})";
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}
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}
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public class Interval : Curve {
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public Interval(float begin, float end, Curve curve = null) {
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this.begin = begin;
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this.end = end;
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this.curve = curve ?? Curves.linear;
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}
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public readonly float begin;
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public readonly float end;
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public readonly Curve curve;
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protected override float transformInternal(float t) {
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D.assert(t >= 0.0 && t <= 1.0);
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D.assert(begin >= 0.0);
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D.assert(begin <= 1.0);
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D.assert(end >= 0.0);
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D.assert(end <= 1.0);
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D.assert(end >= begin);
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t = ((t - begin) / (end - begin)).clamp(0.0f, 1.0f);
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if (t == 0.0 || t == 1.0) {
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return t;
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}
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return curve.transform(t);
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}
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public override string ToString() {
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if (!(curve is _Linear)) {
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return $"{GetType()}({begin}\u22EF{end}\u27A9{curve}";
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}
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return $"{GetType()}({begin}\u22EF{end})";
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}
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}
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public class Threshold : Curve {
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public Threshold(float threshold) {
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this.threshold = threshold;
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}
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public readonly float threshold;
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protected override float transformInternal(float t) {
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D.assert(threshold >= 0.0);
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D.assert(threshold <= 1.0);
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return t < threshold ? 0.0f : 1.0f;
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}
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}
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public class Cubic : Curve {
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public Cubic(float a, float b, float c, float d) {
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this.a = a;
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this.b = b;
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this.c = c;
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this.d = d;
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}
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public readonly float a;
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public readonly float b;
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public readonly float c;
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public readonly float d;
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const float _cubicErrorBound = 0.001f;
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float _evaluateCubic(float a, float b, float m) {
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return 3 * a * (1 - m) * (1 - m) * m +
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3 * b * (1 - m) * m * m +
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m * m * m;
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}
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protected override float transformInternal(float t) {
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float start = 0.0f;
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float end = 1.0f;
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while (true) {
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float midpoint = (start + end) / 2;
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float estimate = _evaluateCubic(a, c, midpoint);
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if ((t - estimate).abs() < _cubicErrorBound) {
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return _evaluateCubic(b, d, midpoint);
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}
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if (estimate < t) {
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start = midpoint;
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}
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else {
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end = midpoint;
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}
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}
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}
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public override string ToString() {
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return $"{GetType()}({a:F2}, {b:F2}, {c:F2}, {d:F2})";
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}
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}
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public abstract class Curve2D : ParametricCurve<Offset> {
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internal IEnumerable<Curve2DSample> generateSamples(
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float start = 0.0f,
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float end = 1.0f,
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float tolerance = 1e-10f) {
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D.assert(end > start);
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Random rand = new Random(samplingSeed);
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bool isFlat(Offset p, Offset q, Offset r) {
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Offset pr = p - r;
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Offset qr = q - r;
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float z = pr.dx * qr.dy - qr.dx * pr.dy;
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return z * z < tolerance;
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}
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Curve2DSample first = new Curve2DSample(start, transform(start));
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Curve2DSample last = new Curve2DSample(end, transform(end));
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List<Curve2DSample> samples = new List<Curve2DSample>(){first};
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void sample(Curve2DSample p, Curve2DSample q, bool forceSubdivide = false) {
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float t = p.t + (0.45f + 0.1f * (float)rand.NextDouble() * (q.t - p.t));
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Curve2DSample r = new Curve2DSample(t, transform(t));
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if (!forceSubdivide && isFlat(p.value, q.value, r.value)) {
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samples.Add(q);
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}
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else {
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sample(p, r);
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sample(r, q);
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}
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}
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sample(first, last,
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forceSubdivide: (first.value.dx - last.value.dx).abs() < tolerance &&
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(first.value.dy - last.value.dy).abs() < tolerance);
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return samples;
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}
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protected virtual int samplingSeed {
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get { return 0; }
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}
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public float findInverse(float x) {
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float start = 0.0f;
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float end = 1.0f;
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float mid = 0f;
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float offsetToOrigin(float pos) {
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return x - transform(pos).dx;
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}
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const float errorLimit = 1e-6f;
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int count = 100;
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float startValue = offsetToOrigin(start);
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while ((end - start / 2.0f) > errorLimit && count > 0) {
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mid = (end + start) / 2.0f;
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float value = offsetToOrigin(mid);
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if (value.sign() == startValue.sign()) {
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start = mid;
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}
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else {
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end = mid;
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}
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count--;
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}
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return mid;
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}
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}
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internal class Curve2DSample {
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public Curve2DSample(float t, Offset value) {
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this.t = t;
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this.value = value;
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}
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public readonly float t;
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public readonly Offset value;
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public override string ToString() {
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return $"[{value.dx:F2}, {value.dy:F2}, {t:F2}]";
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}
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}
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class CatmullRomSpline : Curve2D {
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CatmullRomSpline(
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List<Offset> controlPoints,
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float? tension = 0.0f,
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Offset startHandle = null,
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Offset endHandle = null
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) {
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D.assert(controlPoints != null);
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D.assert(tension != null);
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D.assert(tension <= 1.0f, () => $"tension {tension} must not be greater than 1.0.");
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D.assert(tension >= 0.0f, () => $"tension {tension} must not be negative.");
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D.assert(controlPoints.Count > 3, () => "There must be at least four control points to create a CatmullRomSpline.");
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_controlPoints = controlPoints;
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_startHandle = startHandle;
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_endHandle = endHandle;
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_tension = tension;
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_cubicSegments = new List<List<Offset>>();
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}
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internal CatmullRomSpline(
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List<Offset> controlPoints,
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float? tension = 0.0f,
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Offset startHandle = null,
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Offset endHandle = null,
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List<List<Offset>> cubicSegments = null
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) {
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D.assert(cubicSegments != null);
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_controlPoints = controlPoints;
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_startHandle = startHandle;
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_endHandle = endHandle;
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_tension = tension;
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_cubicSegments = new List<List<Offset>>();
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}
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public static CatmullRomSpline precompute(
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List<Offset> controlPoints,
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float? tension = 0.0f,
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Offset startHandle = null,
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Offset endHandle = null
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) {
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D.assert(controlPoints != null);
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D.assert(tension != null);
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D.assert(tension <= 1.0f, () => $"tension {tension} must not be greater than 1.0.");
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D.assert(tension >= 0.0f, () => $"tension {tension} must not be negative.");
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D.assert(controlPoints.Count > 3, () => "There must be at least four control points to create a CatmullRomSpline.");
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return new CatmullRomSpline(
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controlPoints: null,
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tension: null,
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startHandle: null,
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endHandle: null,
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cubicSegments: _computeSegments(controlPoints, tension, startHandle: startHandle, endHandle: endHandle)
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);
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}
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static List<List<Offset>> _computeSegments(
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List<Offset> controlPoints,
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float? tension,
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Offset startHandle,
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Offset endHandle) {
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startHandle = startHandle ?? controlPoints[0] * 2.0f - controlPoints[1];
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endHandle = endHandle ?? controlPoints.last() * 2.0f - controlPoints[controlPoints.Count - 2];
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List<Offset> allPoints = new List<Offset>();
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allPoints.Add(startHandle);
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allPoints.AddRange(controlPoints);
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allPoints.Add(endHandle);
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const float alpha = 0.5f;
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float reverseTension = 1.0f - tension.Value;
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List<List<Offset>> result = new List<List<Offset>>();
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for (int i = 0; i < allPoints.Count - 3; ++i) {
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List<Offset> curve = new List<Offset>{allPoints[i], allPoints[i + 1], allPoints[i + 2], allPoints[i + 3]};
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Offset diffCurve10 = curve[1] - curve[0];
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Offset diffCurve21 = curve[2] - curve[1];
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Offset diffCurve32 = curve[3] - curve[2];
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float t01 = Mathf.Pow(diffCurve10.distance, alpha);
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float t12 = Mathf.Pow(diffCurve21.distance, alpha);
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float t23 = Mathf.Pow(diffCurve32.distance, alpha);
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Offset m1 = (diffCurve21 + (diffCurve10 / t01 - (curve[2] - curve[0]) / (t01 + t12)) * t12) * reverseTension;
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Offset m2 = (diffCurve21 + (diffCurve32 / t23 - (curve[3] - curve[1]) / (t12 + t23)) * t12) * reverseTension;
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Offset sumM12 = m1 + m2;
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List<Offset> segment = new List<Offset> {
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diffCurve21 * -2.0f + sumM12,
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diffCurve21 * 3.0f - m1 - sumM12,
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m1,
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curve[1]
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};
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result.Add(segment);
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}
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return result;
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}
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readonly List<List<Offset>> _cubicSegments;
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readonly List<Offset> _controlPoints;
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readonly Offset _startHandle;
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readonly Offset _endHandle;
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readonly float? _tension;
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void _initializeIfNeeded() {
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if (_cubicSegments.isNotEmpty()) {
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return;
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}
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_cubicSegments.AddRange(_computeSegments(_controlPoints, _tension, startHandle: _startHandle, endHandle: _endHandle));
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}
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protected override int samplingSeed {
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get {
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_initializeIfNeeded();
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Offset seedPoint = _cubicSegments[0][1];
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return ((seedPoint.dx + seedPoint.dy) * 10000).round();
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}
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}
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protected override Offset transformInternal(float t) {
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_initializeIfNeeded();
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float length = _cubicSegments.Count;
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float position;
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float localT;
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int index;
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if (t < 1.0f) {
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position = t * length;
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localT = position - position.floor();
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index = position.floor();
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} else {
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position = length;
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localT = 1.0f;
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index = _cubicSegments.Count - 1;
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}
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List<Offset> cubicControlPoints = _cubicSegments[index];
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float localT2 = localT * localT;
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return cubicControlPoints[0] * localT2 * localT
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+ cubicControlPoints[1] * localT2
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+ cubicControlPoints[2] * localT
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+ cubicControlPoints[3];
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}
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}
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public class CatmullRomCurve : Curve {
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public CatmullRomCurve(
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List<Offset> controlPoints,
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float? tension = 0.0f) {
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D.assert(tension != null);
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this.controlPoints = controlPoints;
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this.tension = tension;
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D.assert(() => {
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_debugAssertReasons.Clear();
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return validateControlPoints(controlPoints,
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tension: tension,
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reasons: _debugAssertReasons);
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}, () => $"control points {controlPoints} could not be validated:\n {string.Join("\n ", _debugAssertReasons)}");
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_precomputedSamples = new List<Curve2DSample>();
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}
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internal CatmullRomCurve(
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List<Offset> controlPoints,
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float? tension = 0.0f,
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List<Curve2DSample> precomputedSamples = null) {
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D.assert(precomputedSamples != null);
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D.assert(tension != null);
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this.controlPoints = controlPoints;
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this.tension = tension;
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D.assert(() => {
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_debugAssertReasons.Clear();
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return validateControlPoints(controlPoints,
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tension: tension,
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reasons: _debugAssertReasons);
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}, () => $"control points {controlPoints} could not be validated:\n {string.Join("\n ", _debugAssertReasons)}");
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_precomputedSamples = precomputedSamples;
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}
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public static CatmullRomCurve precompute(
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List<Offset> controlPoints, float? tension = 0.0f) {
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return new CatmullRomCurve(
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controlPoints,
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tension,
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_computeSamples(controlPoints, tension));
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}
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static List<Curve2DSample> _computeSamples(List<Offset> controlPoints, float? tension) {
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List<Offset> _controlPoints = new List<Offset>();
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_controlPoints.Add(Offset.zero);
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_controlPoints.AddRange(controlPoints);
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_controlPoints.Add(new Offset(1.0f, 1.0f));
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return CatmullRomSpline.precompute(_controlPoints, tension: tension).generateSamples(
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start: 0.0f, end: 1.0f, tolerance: 1e-12f).ToList();
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}
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static readonly List<String> _debugAssertReasons = new List<String>();
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readonly List<Curve2DSample> _precomputedSamples;
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public readonly List<Offset> controlPoints;
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public readonly float? tension;
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static bool validateControlPoints(
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List<Offset> controlPoints,
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float? tension = 0.0f,
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List<string> reasons = null) {
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D.assert(tension != null);
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if (controlPoints == null) {
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D.assert(() => {
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reasons?.Add("Supplied control points cannot be null");
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return true;
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});
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return false;
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}
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if (controlPoints.Count < 2) {
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D.assert(() => {
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reasons?.Add("There must be at least two points supplied to create a valid curve.");
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return true;
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});
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return false;
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}
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List<Offset> _controlPoints = new List<Offset>();
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_controlPoints.AddRange(controlPoints);
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_controlPoints.Insert(0, Offset.zero);
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_controlPoints.Add(new Offset(1.0f, 1.0f));
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Offset startHandle = _controlPoints[0] * 2.0f - _controlPoints[1];
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Offset endHandle = _controlPoints.last() * 2.0f - _controlPoints[_controlPoints.Count - 2];
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_controlPoints.Insert(0, startHandle);
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_controlPoints.Add(endHandle);
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float lastX = -float.PositiveInfinity;
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for (int i = 0; i < _controlPoints.Count; ++i) {
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if (i > 1 &&
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i < _controlPoints.Count - 2 &&
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(_controlPoints[i].dx <= 0.0f || _controlPoints[i].dx >= 1.0f)) {
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D.assert(() => {
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reasons?.Add("Control points must have X values between 0.0 and 1.0, exclusive. " +
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$"Point {i} has an x value ({_controlPoints[i].dx}) which is outside the range.");
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return true;
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});
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return false;
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}
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if (_controlPoints[i].dx <= lastX) {
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D.assert(() => {
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reasons?.Add("Each X coordinate must be greater than the preceding X coordinate " +
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$"(i.e. must be monotonically increasing in X). Point {i} has an x value of " +
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$"{_controlPoints[i].dx}, which is not greater than {lastX}");
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return true;
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});
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return false;
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}
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lastX = _controlPoints[i].dx;
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}
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bool success = true;
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lastX = -float.PositiveInfinity;
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const float tolerance = 1e-3f;
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CatmullRomSpline testSpline = new CatmullRomSpline(_controlPoints, tension: tension);
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float start = testSpline.findInverse(0.0f);
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float end = testSpline.findInverse(1.0f);
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IEnumerable<Curve2DSample> samplePoints = testSpline.generateSamples(start: start, end: end);
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if (samplePoints.First().value.dy.abs() > tolerance ||
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(1.0f - samplePoints.Last().value.dy).abs() > tolerance) {
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bool bail = true;
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success = false;
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D.assert(() => {
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reasons?.Add($"The curve has more than one Y value at X = {samplePoints.First().value.dx}. " +
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"Try moving some control points further away from this value of X, or increasing " +
|
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"the tension.");
|
|
bail = reasons == null;
|
|
return true;
|
|
});
|
|
if (bail) {
|
|
return false;
|
|
}
|
|
}
|
|
foreach (Curve2DSample sample in samplePoints) {
|
|
Offset point = sample.value;
|
|
float t = sample.t;
|
|
float x = point.dx;
|
|
if (t >= start && t <= end && (x < -1e-3f || x > 1.0f + 1e-3f)) {
|
|
bool bail = true;
|
|
success = false;
|
|
D.assert(() => {
|
|
reasons?.Add($"The resulting curve has an X value ({x}) which is outside " +
|
|
"the range [0.0, 1.0], inclusive.");
|
|
bail = reasons == null;
|
|
return true;
|
|
});
|
|
if (bail) {
|
|
return false;
|
|
}
|
|
}
|
|
if (x < lastX) {
|
|
bool bail = true;
|
|
success = false;
|
|
D.assert(() => {
|
|
reasons?.Add($"The curve has more than one Y value at x = {x}. Try moving " +
|
|
"some control points further apart in X, or increasing the tension.");
|
|
bail = reasons == null;
|
|
return true;
|
|
});
|
|
if (bail) {
|
|
return false;
|
|
}
|
|
}
|
|
lastX = x;
|
|
}
|
|
return success;
|
|
}
|
|
|
|
protected override float transformInternal(float t) {
|
|
if (_precomputedSamples.isEmpty()) {
|
|
// Compute the samples now if we were constructed lazily.
|
|
_precomputedSamples.AddRange(_computeSamples(controlPoints, tension));
|
|
}
|
|
int start = 0;
|
|
int end = _precomputedSamples.Count - 1;
|
|
int mid;
|
|
Offset value;
|
|
Offset startValue = _precomputedSamples[start].value;
|
|
Offset endValue = _precomputedSamples[end].value;
|
|
while (end - start > 1) {
|
|
mid = (end + start) / 2;
|
|
value = _precomputedSamples[mid].value;
|
|
if (t >= value.dx) {
|
|
start = mid;
|
|
startValue = value;
|
|
} else {
|
|
end = mid;
|
|
endValue = value;
|
|
}
|
|
}
|
|
float t2 = (t - startValue.dx) / (endValue.dx - startValue.dx);
|
|
return Mathf.Lerp(startValue.dy, endValue.dy, t2);
|
|
}
|
|
}
|
|
|
|
public class FlippedCurve : Curve {
|
|
public FlippedCurve(Curve curve) {
|
|
D.assert(curve != null);
|
|
this.curve = curve;
|
|
}
|
|
|
|
public readonly Curve curve;
|
|
|
|
protected override float transformInternal(float t) {
|
|
return 1.0f - curve.transform(1.0f - t);
|
|
}
|
|
|
|
public override string ToString() {
|
|
return $"{GetType()}({curve})";
|
|
}
|
|
}
|
|
|
|
class _DecelerateCurve : Curve {
|
|
internal _DecelerateCurve() {
|
|
}
|
|
|
|
protected override float transformInternal(float t) {
|
|
t = 1.0f - t;
|
|
return 1.0f - t * t;
|
|
}
|
|
}
|
|
|
|
class _BounceInCurve : Curve {
|
|
internal _BounceInCurve() {
|
|
}
|
|
|
|
protected override float transformInternal(float t) {
|
|
return 1.0f - Curves._bounce(1.0f - t);
|
|
}
|
|
}
|
|
|
|
class _BounceOutCurve : Curve {
|
|
internal _BounceOutCurve() {
|
|
}
|
|
|
|
protected override float transformInternal(float t) {
|
|
return Curves._bounce(t);
|
|
}
|
|
}
|
|
|
|
class _BounceInOutCurve : Curve {
|
|
internal _BounceInOutCurve() {
|
|
}
|
|
|
|
protected override float transformInternal(float t) {
|
|
if (t < 0.5f) {
|
|
return (1.0f - Curves._bounce(1.0f - t)) * 0.5f;
|
|
}
|
|
else {
|
|
return Curves._bounce(t * 2.0f - 1.0f) * 0.5f + 0.5f;
|
|
}
|
|
}
|
|
}
|
|
|
|
public class ElasticInCurve : Curve {
|
|
public ElasticInCurve(float period = 0.4f) {
|
|
this.period = period;
|
|
}
|
|
|
|
public readonly float period;
|
|
|
|
protected override float transformInternal(float t) {
|
|
float s = period / 4.0f;
|
|
t = t - 1.0f;
|
|
return -Mathf.Pow(2.0f, 10.0f * t) * Mathf.Sin((t - s) * (Mathf.PI * 2.0f) / period);
|
|
}
|
|
|
|
public override string ToString() {
|
|
return $"{GetType()}({period})";
|
|
}
|
|
}
|
|
|
|
public class ElasticOutCurve : Curve {
|
|
public ElasticOutCurve(float period = 0.4f) {
|
|
this.period = period;
|
|
}
|
|
|
|
public readonly float period;
|
|
|
|
protected override float transformInternal(float t) {
|
|
float s = period / 4.0f;
|
|
return Mathf.Pow(2.0f, -10.0f * t) * Mathf.Sin((t - s) * (Mathf.PI * 2.0f) / period) + 1.0f;
|
|
}
|
|
|
|
public override string ToString() {
|
|
return $"{GetType()}({period})";
|
|
}
|
|
}
|
|
|
|
public class ElasticInOutCurve : Curve {
|
|
public ElasticInOutCurve(float period = 0.4f) {
|
|
this.period = period;
|
|
}
|
|
|
|
public readonly float period;
|
|
|
|
protected override float transformInternal(float t) {
|
|
float s = period / 4.0f;
|
|
t = 2.0f * t - 1.0f;
|
|
if (t < 0.0) {
|
|
return -0.5f * Mathf.Pow(2.0f, 10.0f * t) * Mathf.Sin((t - s) * (Mathf.PI * 2.0f) / period);
|
|
}
|
|
else {
|
|
return Mathf.Pow(2.0f, -10.0f * t) * Mathf.Sin((t - s) * (Mathf.PI * 2.0f) / period) * 0.5f +
|
|
1.0f;
|
|
}
|
|
}
|
|
|
|
public override string ToString() {
|
|
return $"{GetType()}({period})";
|
|
}
|
|
}
|
|
|
|
public static class Curves {
|
|
public static readonly Curve linear = new _Linear();
|
|
|
|
public static readonly Curve decelerate = new _DecelerateCurve();
|
|
|
|
public static readonly Cubic fastLinearToSlowEaseIn = new Cubic(0.18f, 1.0f, 0.04f, 1.0f);
|
|
|
|
public static readonly Curve ease = new Cubic(0.25f, 0.1f, 0.25f, 1.0f);
|
|
|
|
public static readonly Curve easeIn = new Cubic(0.42f, 0.0f, 1.0f, 1.0f);
|
|
|
|
public static readonly Cubic easeInToLinear = new Cubic(0.67f, 0.03f, 0.65f, 0.09f);
|
|
|
|
public static readonly Cubic easeInSine = new Cubic(0.47f, 0, 0.745f, 0.715f);
|
|
|
|
public static readonly Cubic easeInQuad = new Cubic(0.55f, 0.085f, 0.68f, 0.53f);
|
|
|
|
public static readonly Cubic easeInCubic = new Cubic(0.55f, 0.055f, 0.675f, 0.19f);
|
|
|
|
public static readonly Cubic easeInQuart = new Cubic(0.895f, 0.03f, 0.685f, 0.22f);
|
|
|
|
public static readonly Cubic easeInQuint = new Cubic(0.755f, 0.05f, 0.855f, 0.06f);
|
|
|
|
public static readonly Cubic easeInExpo = new Cubic(0.95f, 0.05f, 0.795f, 0.035f);
|
|
|
|
public static readonly Cubic easeInCirc = new Cubic(0.6f, 0.04f, 0.98f, 0.335f);
|
|
|
|
public static readonly Cubic easeInBack = new Cubic(0.6f, -0.28f, 0.735f, 0.045f);
|
|
|
|
public static readonly Curve easeOut = new Cubic(0.0f, 0.0f, 0.58f, 1.0f);
|
|
|
|
public static readonly Cubic linearToEaseOut = new Cubic(0.35f, 0.91f, 0.33f, 0.97f);
|
|
|
|
public static readonly Cubic easeOutSine = new Cubic(0.39f, 0.575f, 0.565f, 1.0f);
|
|
|
|
public static readonly Cubic easeOutQuad = new Cubic(0.25f, 0.46f, 0.45f, 0.94f);
|
|
|
|
public static readonly Cubic easeOutCubic = new Cubic(0.215f, 0.61f, 0.355f, 1.0f);
|
|
|
|
public static readonly Cubic easeOutQuart = new Cubic(0.165f, 0.84f, 0.44f, 1.0f);
|
|
|
|
public static readonly Cubic easeOutQuint = new Cubic(0.23f, 1.0f, 0.32f, 1.0f);
|
|
|
|
public static readonly Cubic easeOutExpo = new Cubic(0.19f, 1.0f, 0.22f, 1.0f);
|
|
|
|
public static readonly Cubic easeOutCirc = new Cubic(0.075f, 0.82f, 0.165f, 1.0f);
|
|
|
|
public static readonly Cubic easeOutBack = new Cubic(0.175f, 0.885f, 0.32f, 1.275f);
|
|
|
|
public static readonly Curve easeInOut = new Cubic(0.42f, 0.0f, 0.58f, 1.0f);
|
|
|
|
public static readonly Cubic easeInOutSine = new Cubic(0.445f, 0.05f, 0.55f, 0.95f);
|
|
|
|
public static readonly Cubic easeInOutQuad = new Cubic(0.455f, 0.03f, 0.515f, 0.955f);
|
|
|
|
public static readonly Cubic easeInOutCubic = new Cubic(0.645f, 0.045f, 0.355f, 1.0f);
|
|
|
|
public static readonly Cubic easeInOutQuart = new Cubic(0.77f, 0, 0.175f, 1.0f);
|
|
|
|
public static readonly Cubic easeInOutQuint = new Cubic(0.86f, 0, 0.07f, 1.0f);
|
|
|
|
public static readonly Cubic easeInOutExpo = new Cubic(1.0f, 0, 0, 1.0f);
|
|
|
|
public static readonly Cubic easeInOutCirc = new Cubic(0.785f, 0.135f, 0.15f, 0.86f);
|
|
|
|
public static readonly Cubic easeInOutBack = new Cubic(0.68f, -0.55f, 0.265f, 1.55f);
|
|
|
|
public static readonly Cubic fastOutSlowIn = new Cubic(0.4f, 0.0f, 0.2f, 1.0f);
|
|
|
|
public static readonly Cubic slowMiddle = new Cubic(0.15f, 0.85f, 0.85f, 0.15f);
|
|
|
|
public static readonly Curve bounceIn = new _BounceInCurve();
|
|
|
|
public static readonly Curve bounceOut = new _BounceOutCurve();
|
|
|
|
public static readonly Curve bounceInOut = new _BounceInOutCurve();
|
|
|
|
public static readonly Curve elasticIn = new ElasticInCurve();
|
|
|
|
public static readonly Curve elasticOut = new ElasticOutCurve();
|
|
|
|
public static readonly Curve elasticInOut = new ElasticInOutCurve();
|
|
|
|
internal static float _bounce(float t) {
|
|
if (t < 1.0f / 2.75f) {
|
|
return 7.5625f * t * t;
|
|
}
|
|
else if (t < 2 / 2.75f) {
|
|
t -= 1.5f / 2.75f;
|
|
return 7.5625f * t * t + 0.75f;
|
|
}
|
|
else if (t < 2.5f / 2.75f) {
|
|
t -= 2.25f / 2.75f;
|
|
return 7.5625f * t * t + 0.9375f;
|
|
}
|
|
|
|
t -= 2.625f / 2.75f;
|
|
return 7.5625f * t * t + 0.984375f;
|
|
}
|
|
}
|
|
}
|