/// <summary>
/// 设置背景（不带有转换特效）
/// </summary>
/// <param name="spriteName">需要更改的背景图片名</param>
public EffectPiece SetBackground(string spriteName)
{
Queue <NewImageEffect> effects = new Queue <NewImageEffect>();
effects.Enqueue(NewEffectBuilder.SetBackSprite(spriteName));
effects.Enqueue(NewEffectBuilder.SetAlphaBackSprite(1));
return(new EffectPiece(id++, effects));
}
/// <summary>
/// 设置背景（从0淡入）
/// </summary>
/// <param name="fadein">新图淡入的时间，默认0.3s</param>
public EffectPiece FadeinBackground(string spriteName, float fadein = 0.5f)
{
Queue <NewImageEffect> effects = new Queue <NewImageEffect>();
effects.Enqueue(NewEffectBuilder.SetAlphaBackSprite(0));
effects.Enqueue(NewEffectBuilder.SetBackSprite(spriteName));
effects.Enqueue(NewEffectBuilder.FadeInBackSprite(fadein));
return(new EffectPiece(id++, effects));
}