// Fade the sprite to fully transparent
public void FadeToTransparent(float time)
{
if (time <= float.Epsilon) // imediate
{
SetActive(false);
_alphaMode = eAlphaMode.transparent;
return;
}
switch (_alphaMode)
{
case eAlphaMode.fadingToTransparent: // we are already fading to opaque
_startingFadeTime = CalculateFakeStartTime(_fadeLength, time);
break;
case eAlphaMode.fadingToOpaque:
_alphaMode = eAlphaMode.fadingToTransparent; // we're fading to transparent now
// here, as we're mid-way through a fade, we're faking that the fade started in the past so we get no jump in alpha value
_startingFadeTime = CalculateFakeStartTimeForDirectionChange(_fadeLength, time);
break;
case eAlphaMode.opaque:
_alphaMode = eAlphaMode.fadingToTransparent; // we're fading to transparent
_startingFadeTime = Time.time;
break;
default: break;
}
_fadeLength = time;
}
public void Update()
{
if (IsActive())
{
float newAlpha = ((Time.time - _startingFadeTime) / _fadeLength);
switch (_alphaMode)
{
case eAlphaMode.fadingToTransparent:
newAlpha = 1f - newAlpha;
if (newAlpha <= 0f)
{
SetActive(false);
_alphaMode = eAlphaMode.transparent;
}
else
{
_sprite.alpha = newAlpha;
}
break;
case eAlphaMode.fadingToOpaque:
if (newAlpha > 1f)
{
newAlpha = 1f;
_alphaMode = eAlphaMode.opaque;
}
_sprite.alpha = newAlpha;
break;
default: break;
}
}
}