/// <summary>
/// Attaches a SpriteFader component to a sprite object to transition its color over time.
/// </summary>
public static void FadeSprite(SpriteRenderer spriteRenderer, Color targetColor, float duration, Vector2 slideOffset, Action onComplete = null)
{
if (spriteRenderer == null)
{
Debug.LogError("Sprite renderer must not be null");
return;
}
// Fade child sprite renderers
var spriteRenderers = spriteRenderer.gameObject.GetComponentsInChildren <SpriteRenderer>();
for (int i = 0; i < spriteRenderers.Length; i++)
{
var sr = spriteRenderers[i];
if (sr == spriteRenderer)
{
continue;
}
FadeSprite(sr, targetColor, duration, slideOffset);
}
// Destroy any existing fader component
SpriteFader oldSpriteFader = spriteRenderer.GetComponent <SpriteFader>();
if (oldSpriteFader != null)
{
Destroy(oldSpriteFader);
}
// Early out if duration is zero
if (Mathf.Approximately(duration, 0f))
{
spriteRenderer.color = targetColor;
if (onComplete != null)
{
onComplete();
}
return;
}
// Set up color transition to be applied during update
SpriteFader spriteFader = spriteRenderer.gameObject.AddComponent <SpriteFader>();
spriteFader.fadeDuration = duration;
spriteFader.startColor = spriteRenderer.color;
spriteFader.endColor = targetColor;
spriteFader.endPosition = spriteRenderer.transform.position;
spriteFader.slideOffset = slideOffset;
spriteFader.onFadeComplete = onComplete;
}
public override void OnEnter()
{
if (spriteRenderer == null)
{
Continue();
return;
}
SpriteFader.FadeSprite(spriteRenderer, _targetColor.Value, _duration.Value, Vector2.zero, delegate {
if (waitUntilFinished)
{
Continue();
}
});
if (!waitUntilFinished)
{
Continue();
}
}