private IEnumerator FollowCurveFixedSpeed(List <Transform> curve)
{
// create list of waypoints based on bezier curve,
var waypointList = new List <Vector2>();
for (float t = 0; t <= 1; t += (1f / waveConfig.GetNumWaypoints()))
{
var newPos = Mathf.Pow(1 - t, 3) * curve[0].position +
3 * Mathf.Pow(1 - t, 2) * t * curve[1].position +
3 * (1 - t) * Mathf.Pow(t, 2) * curve[2].position +
Mathf.Pow(t, 3) * curve[3].position;
newPos = ApplyReverse(newPos);
newPos = ApplyOffset(newPos);
waypointList.Add(newPos);
}
// moves from waypoint to waypoint at fixed speed, yielding at each frame
int currentWaypointIndex = 0;
while (currentWaypointIndex <= waypointList.Count - 1)
{
var targetPos = waypointList[currentWaypointIndex];
var deltaMove = waveConfig.GetEnemySpeed() * Time.deltaTime;
var newPos = Vector2.MoveTowards(transform.position,
targetPos,
deltaMove);
if (newPos != targetPos)
{
yield return(transform.position = newPos);
}
else
{
currentWaypointIndex++;
}
}
}