// Update is called once per frame
void Update()
{
// If we are currently applying a tint...
if (_tintState != TintFlashState.NoTint)
{
// Modify it by the current rate of change and apply it
_tintColor.a = Mathf.Clamp01(_tintColor.a + _tintSpeed * Time.deltaTime);
_material.SetColor(TintProperty, _tintColor);
}
switch (_tintState)
{
case TintFlashState.IncreasingTint:
// If we are currently increasing the tint, stop when it reaches 1
if (_tintColor.a >= 1)
{
// When it has reached 1, start decreasing the tint again
_tintState = TintFlashState.RemovingTint;
_tintSpeed = -_tintSpeed;
}
break;
case TintFlashState.RemovingTint:
// If we are currently decreasing the tint, stop when it reaches 0
if (_tintColor.a <= 0)
{
_tintState = TintFlashState.NoTint;
_tintSpeed = 0;
}
break;
}
}
/**
* Applies a tint for a fixed duration. The intensity of the tint will rise to maximum until the half time of the
* duration. Afterwards it decreases to zero.
*/
public void FlashTint(Color tintColor, float duration)
{
_tintColor = tintColor;
_tintColor.a = 0; // The alpha value controls the intensity of the tint in this shader. Start with no tint.
// Compute a rate of change of tint so that maximum tint is reached halfway of the duration.
_tintSpeed = 1 / (duration / 2);
_tintState = TintFlashState.IncreasingTint;
}