public override void EnterPortal(CharacterMotor motor)
{
GameObject instance = GameObject.Instantiate(Resources.Load("CorridorPrefab")) as GameObject;
Corridor result = instance.GetComponent <Corridor>();
Vector3 up = motor.arc.EvaluateNormal(motor.angle);
Vector3 forward = motor.arc.Evaluate(motor.angle);
result.up = up;
result.forward = forward;
result.near_id = this.near_id;
result.far_id = this.far_id;
result.direction = this.direction;
result.start_size = this.start_size;
result.end_size = this.end_size;
motor.EnterNexus(result);
}