public static Tween Create(TweenMode mode, Ease.Easer easer = null, float duration = 1f, bool start = false)
{
Tween tween;
if (cached.Count == 0)
tween = new Tween();
else
tween = cached.Pop();
tween.OnUpdate = tween.OnComplete = tween.OnStart = null;
tween.Init(mode, easer, duration, start);
return tween;
}
public Tween(TweenMode mode, Ease.Easer easer = null, int duration = 1, bool start = false)
: base(false, false)
{
#if DEBUG
if (duration < 1)
throw new Exception("Tween duration cannot be less than 1");
#endif
Mode = mode;
Easer = easer;
Duration = duration;
Active = false;
if (start)
Start();
}
public static Tween Position(Entity entity, Vector2 targetPosition, float duration, Ease.Easer easer, TweenMode tweenMode = TweenMode.Oneshot)
{
Vector2 startPosition = entity.Position;
Tween tween = Tween.Create(tweenMode, easer, duration, true);
tween.OnUpdate = (t) => { entity.Position = Vector2.Lerp(startPosition, targetPosition, t.Eased); };
entity.Add(tween);
return tween;
}
private void Init(TweenMode mode, Ease.Easer easer, float duration, bool start)
{
#if DEBUG
if (duration <= 0)
throw new Exception("Tween duration cannot be less than zero");
#else
if (duration <= 0)
duration = .000001f;
#endif
Mode = mode;
Easer = easer;
Duration = duration;
TimeLeft = 0;
Percent = 0;
Active = false;
if (start)
Start();
}
public static Tween Set(Entity entity, TweenMode tweenMode, float duration, Ease.Easer easer, Action<Tween> onUpdate, Action<Tween> onComplete = null)
{
Tween tween = Tween.Create(tweenMode, easer, duration, true);
tween.OnUpdate += onUpdate;
tween.OnComplete += onComplete;
entity.Add(tween);
return tween;
}
public static Tween Alpha(GraphicsComponent image, float targetAlpha, int duration, Ease.Easer easer, TweenMode tweenMode = TweenMode.Oneshot)
{
Entity entity = image.Entity;
float startAlpha = image.Color.A / 255;
Tween tween = new Tween(tweenMode, easer, duration, true);
tween.OnUpdate = (t) => { image.Color.A = (byte)Math.Round(MathHelper.Lerp(startAlpha, targetAlpha, t.Eased) * 255.0f); };
entity.Add(tween);
return tween;
}
public static Tween Set(Entity entity, int duration, Ease.Easer easer, Action<Tween> onUpdate, TweenMode tweenMode = TweenMode.Oneshot)
{
Tween tween = new Tween(tweenMode, easer, duration, true);
tween.OnUpdate += onUpdate;
entity.Add(tween);
return tween;
}
public static Tween Scale(GraphicsComponent image, Vector2 targetScale, int duration, Ease.Easer easer, TweenMode tweenMode = TweenMode.Oneshot)
{
Vector2 startScale = image.Scale;
Tween tween = new Tween(tweenMode, easer, duration, true);
tween.OnUpdate = (t) => { image.Scale = Vector2.Lerp(startScale, targetScale, t.Eased); };
image.Entity.Add(tween);
return tween;
}