private IEnumerator FlickAction(Vector3 pos, Vector3 vec)
{
Vector3 org = pos - vec;
bool isWeak = vec.magnitude < flickDistance;
bool isDist = vec.Similarity (st.Vec) < elasticDotSimilarity;
bool isShort = st.Vec.magnitude < elasticDistance;
if (isWeak || isDist || isShort) {
yield break;
}
Color effectColor = flickColor;
StartCoroutine(ripple(org, effectColor));
StartCoroutine(ripple(pos, effectColor));
yield return null;
handler.OnFlicked (vec);
SetPos (org);
SetStretch (vec.magnitude * stretchScale);
SetDirection (vec.normalized);
SetTargetColor (effectColor);
SetTargetAlpha (1f);
SetCurrentAlpha (0f);
yield return new WaitForSeconds(0.3f);
SetTargetColor (Color.white);
SetTargetAlpha (0f);
}