IEnumerator FlashLoop(float secondsForOneFlash, float minAlpha, float maxAlpha)
{
// half the flash time should be on flash in, the other half for flash out
float flashInDuration = secondsForOneFlash / 2;
float flashOutDuration = secondsForOneFlash / 2;
// start the flash cycle
while (true)
{
OnCycleStart.Invoke();
// flash in
for (float t = 0f; t <= flashInDuration; t += Time.deltaTime)
{
Color newColor = _flashImage.color;
newColor.a = Mathf.Lerp(minAlpha, maxAlpha, t / flashInDuration);
_flashImage.color = newColor;
yield return(null);
}
// flash out
for (float t = 0f; t <= flashOutDuration; t += Time.deltaTime)
{
Color newColor = _flashImage.color;
newColor.a = Mathf.Lerp(maxAlpha, minAlpha, t / flashOutDuration);
_flashImage.color = newColor;
yield return(null);
}
OnCycleComplete.Invoke();
}
}
IEnumerator PulseLoop(float secondsForOnePulse, float minSize, float maxSize)
{
// half the pulse time should be for grow, and half for shrink
float growDuration = secondsForOnePulse / 2;
float shrinkDuration = secondsForOnePulse / 2;
// start the pulse loop
while (true)
{
float currentScaleAdjustment;
OnCycleStart.Invoke();
// growth cycle
for (float t = 0; t <= growDuration; t += Time.deltaTime)
{
currentScaleAdjustment = Mathf.Lerp(minSize, maxSize, t / growDuration);
transform.localScale = new Vector3
(currentScaleAdjustment, currentScaleAdjustment, currentScaleAdjustment);
yield return(null);
}
// shrink cycle
for (float t = 0; t <= shrinkDuration; t += Time.deltaTime)
{
currentScaleAdjustment = Mathf.Lerp(maxSize, minSize, t / shrinkDuration);
transform.localScale = new Vector3
(currentScaleAdjustment, currentScaleAdjustment, currentScaleAdjustment);
yield return(null);
}
OnCycleComplete.Invoke();
}
}
