您最多选择25个主题 主题必须以中文或者字母或数字开头,可以包含连字符 (-),并且长度不得超过35个字符
 
 
 
 
 
 

117 行
3.5 KiB

using System.Collections.Generic;
using Unity.UIWidgets.foundation;
using Unity.UIWidgets.animation;
using Unity.UIWidgets.rendering;
using Unity.UIWidgets.ui;
using Unity.UIWidgets.widgets;
using Unity.UIWidgets.scheduler2;
using System;
using Unity.UIWidgets.gestures;
using Unity.UIWidgets.painting;
using UnityEngine;
using Color = Unity.UIWidgets.ui.Color;
using Rect = Unity.UIWidgets.ui.Rect;
using Transform = Unity.UIWidgets.widgets.Transform;
namespace Unity.UIWidgets.animation {
class TweenSequence<T> : Animatable<T> {
public TweenSequence(List<TweenSequenceItem<T>> items) {
D.assert(items != null);
D.assert(items.isNotEmpty);
foreach (var item in items) {
_items.Add(item);
}
//_items.addAll(items);
float totalWeight = 0.0f;
foreach (TweenSequenceItem<T> item in _items)
totalWeight += item.weight;
D.assert(totalWeight > 0.0f);
float start = 0.0f;
for (int i = 0; i < _items.Count; i += 1) {
float end = i == _items.Count - 1 ? 1.0f : start + _items[i].weight / totalWeight;
_intervals.Add(new _Interval(start, end));
start = end;
}
}
public readonly List<TweenSequenceItem<T>> _items = new List<TweenSequenceItem<T>>();
public readonly List<_Interval> _intervals = new List<_Interval>();
public T _evaluateAt(float t, int index) {
TweenSequenceItem<T> element = _items[index];
float tInterval = _intervals[index].value(t);
return element.tween.transform(tInterval);
}
public override T transform(float t) {
D.assert(t >= 0.0 && t <= 1.0);
if (t == 1.0)
return _evaluateAt(t, _items.Count - 1);
for (int index = 0; index < _items.Count; index++) {
if (_intervals[index].contains(t))
return _evaluateAt(t, index);
}
D.assert(false, ()=> $"TweenSequence.evaluate() could not find an interval for {t}");
return default(T);
}
public override string ToString(){
return $"TweenSequence({_items.Count} items)";
}
}
class FlippedTweenSequence : TweenSequence<float> {
FlippedTweenSequence(List<TweenSequenceItem<float>> items)
: base(items) {
D.assert(items != null);
}
public override float transform(float t) => 1 - base.transform(1 - t);
}
class TweenSequenceItem<T> {
public TweenSequenceItem(
Animatable<T> tween = null,
float weight = 0.0f
) {
this.tween = tween;
this.weight = weight;
D.assert(tween != null);
D.assert(weight != null);
D.assert(weight > 0.0);
}
public readonly Animatable<T> tween;
public readonly float weight;
}
public class _Interval {
public _Interval(float start, float end) {
this.start = start;
this.end = end;
D.assert(end > start);
}
public readonly float start;
public readonly float end;
public bool contains(float t) {
return t >= start && t < end;
}
public float value(float t) {
return (t - start) / (end - start);
}
public override string ToString() {
return $"<{start}," + $" {end}>";
}
}
}