private bool CheckIfTerminal(double altitude, Vector3 targetPosition, Vector3 upDirection)
{
Vector3 surfacePos = this._missile.vessel.transform.position +
Vector3.Project(targetPosition - this._missile.vessel.transform.position, -upDirection);
float distanceToTarget = Vector3.Distance(surfacePos, targetPosition);
_missile.debugString.Append($"Distance to target" + distanceToTarget);
_missile.debugString.Append(Environment.NewLine);
double freefallTime = CalculateFreeFallTime(altitude);
_missile.debugString.Append($"freefallTime" + freefallTime);
_missile.debugString.Append(Environment.NewLine);
if (distanceToTarget < (freefallTime * _missile.vessel.horizontalSrfSpeed))
{
GuidanceState = GuidanceState.Terminal;
return(true);
}
return(false);
}