public static IEnumerable<Danmaku> Color(this IEnumerable<Danmaku> danmakus, Gradient colors, Func<Danmaku, bool> filter = null)
{
if (colors == null)
throw new ArgumentNullException("colors");
return danmakus.ForEach(x => x.Color = colors.Random(), filter);
}
public static IEnumerable WithColor(this IEnumerable data,
Gradient gradient,
Func<FireData, bool> filter = null)
{
return data.ForEachFireData(fd => fd.Color = gradient.Random(), filter);
}
