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@markusrt
Created September 3, 2012 22:04
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Unity Script: Fade Orthello sprite in or out
using UnityEngine;
using System.Collections;
public class FadeSprite : MonoBehaviour {
public enum FadeDirection { FadeOut, FadeIn }
public FadeDirection Direction = FadeDirection.FadeOut;
public float Speed = 0.0f;
public bool Loop;
private OTSprite sprite;
private float CurrentDirection
{
get { return Direction == FadeDirection.FadeOut ? -1.0f : 1.0f; }
}
void Start ()
{
sprite = gameObject.GetComponent<OTSprite>();
if(sprite == null)
{
Debug.LogWarning("FadeSprite script only works with orthello sprites");
}
}
void Update ()
{
if (sprite == null)
{
return;
}
ChangeAlpha ();
CheckLoopCondition ();
}
private void ChangeAlpha ()
{
sprite.alpha += Time.deltaTime * Speed * CurrentDirection;
}
void CheckLoopCondition ()
{
var fadeOutCompleted = sprite.alpha < 0.0f;
bool fadeInCompleted = sprite.alpha > 1.0f;
if( Loop && ( fadeOutCompleted || fadeInCompleted ) )
{
ToggleFadeDirection();
}
if( !Loop && fadeOutCompleted )
{
Destroy(gameObject);
}
}
private void ToggleFadeDirection()
{
Direction = Direction == FadeDirection.FadeOut
? FadeDirection.FadeIn : FadeDirection.FadeOut;
}
}
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