// 准备雪花池
public void Init()
{
if (mSnowGoList == null || mSnowGoList.Count == 0)
{
Debug.LogError("mSnowGoList is null or Count is 0");
return;
}
mSnowTypeCount = mSnowGoList.Count;
// int作为key，开辟相同数量，不会引发字典扩容
mSnowMeltHideDic = new Dictionary <int, List <SnowMelt> >(mSnowGoList.Count);
mSnowMeltShowingDic = new Dictionary <int, List <SnowMelt> >(mSnowGoList.Count);
for (int snowGoIdx = 0, max = mSnowGoList.Count; snowGoIdx < max; ++snowGoIdx)
{
// 开辟5个容量，List几乎不用扩容
List <SnowMelt> list = new List <SnowMelt>(5);
List <SnowMelt> showingList = new List <SnowMelt>(5);
for (int snowMeltIdx = 0; snowMeltIdx < mPreGenSnowMeltNum; ++snowMeltIdx)
{
SnowMelt snowMelt = CreateSnowMelt(snowGoIdx);
list.Add(snowMelt);
}
mSnowMeltHideDic.Add(snowGoIdx, list);
mSnowMeltShowingDic.Add(snowGoIdx, showingList);
}
}
// 回收雪花
private void OnSnowMeltEnd(SnowMelt snowMelt)
{
if (snowMelt != null)
{
snowMelt.Hide();
AddSnowMelt(mSnowMeltHideDic, snowMelt);
RemoveSnowMelt(mSnowMeltShowingDic, snowMelt);
}
}
private void RemoveSnowMelt(Dictionary <int, List <SnowMelt> > dic, SnowMelt snowMelt)
{
if (snowMelt == null)
{
return;
}
int snowType = snowMelt.GetSnowType();
if (dic.ContainsKey(snowType))
{
List <SnowMelt> list = dic[snowType];
if (list != null && list.Contains(snowMelt))
{
list.Remove(snowMelt);
}
}
}
// 获取一个雪花，先从池里取，没有再创建
private SnowMelt GenSnowMelt(int snowType)
{
SnowMelt snowMelt = null;
if (mSnowMeltHideDic.ContainsKey(snowType))
{
List <SnowMelt> list = mSnowMeltHideDic[snowType];
if (list != null && list.Count > 0)
{
snowMelt = list[0];
list.RemoveAt(0);
}
else
{
snowMelt = CreateSnowMelt(snowType);
}
}
return(snowMelt);
}
// 创建一个雪花
private SnowMelt CreateSnowMelt(int snowType)
{
SnowMelt newSnowMelt = null;
if (0 <= snowType && snowType < mSnowTypeCount)
{
GameObject snowGo = mSnowGoList[snowType];
Vector3 preLocalScale = snowGo.transform.localScale;
GameObject newGo = GameObject.Instantiate(snowGo);
newGo.transform.parent = transform;
newGo.transform.localRotation = Quaternion.identity;
newGo.transform.localScale = preLocalScale * mSnowLocalScaleFactor;
newSnowMelt = newGo.GetComponent <SnowMelt>();
newSnowMelt.Init();
newSnowMelt.SetSnowType(snowType, mOnSnowMeltEndCallback);
newSnowMelt.Hide();
}
return(newSnowMelt);
}
// 结束融化，回收雪花并隐藏自身，可重新开始
public void Hide()
{
var et = mSnowMeltShowingDic.GetEnumerator();
while (et.MoveNext())
{
List <SnowMelt> list = et.Current.Value;
if (list == null)
{
continue;
}
for (int i = 0, max = list.Count; i < max; ++i)
{
SnowMelt snowMelt = list[0];
list.RemoveAt(0);
snowMelt.Hide();
AddSnowMelt(mSnowMeltHideDic, snowMelt);
}
}
}
// 在屏幕上随机位置创建雪花，count:数量
private void RandomGenSnow(int count)
{
// 强制改成1个
count = 1;
for (int i = 0; i < count; ++i)
{
// 随机雪花样式
int snowType = Random.Range(0, mSnowTypeCount);
SnowMelt snowMelt = GenSnowMelt(snowType);
if (snowMelt != null)
{
// 随机区域和位置
int listIdx = Random.Range(0, mAreaList.Count);
Vector4 v4 = mAreaList[listIdx];
float rX = Random.Range(v4.x, v4.y);
float rY = Random.Range(v4.z, v4.w);
Vector3 localPos = new Vector3(rX, rY, 0);
AddSnowMelt(mSnowMeltShowingDic, snowMelt);
snowMelt.Show(localPos);
}
}
}
