character controllerが床をすり抜けてしまう。

Question

character controllerがうまく作用していないみたいで、オブジェクトが床(plane)をすり抜けてしまいます。
planeのis Triggerはオフになってます。
理由がわかりません。助けてください。
character controllerをつけているオブジェクトの詳細は写真を参考ください。

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerControl : MonoBehaviour {
	private CharacterController playerController;
	public float MOVESPEED;
	public float ROTATESPEED;
	public float GRAVITY;
	private float move_z,move_x,move_y;
	private Animator playerAnimator;
	private float moveforward;
	private GameObject speakbutton;

	public enum CLOSEST
	{
		NONE = -1,
		FRIEND = 0,
		X,
		PLAYER1,
	};

	public CLOSEST closest;

	// Use this for initialization
	void Start () {
		playerController = this.GetComponent<CharacterController> ();
		playerAnimator = this.GetComponent<Animator> ();
		speakbutton = GameObject.FindGameObjectWithTag ("SpeakButton");
		speakbutton.gameObject.SetActive (false);
	}
	
	// Update is called once per frame
	void Update () {
		if (Input.GetAxis ("Vertical") > 0) {	//上矢印で前進量を取得.
			move_z = Input.GetAxis ("Vertical");
		} else {	//上矢印が押されてなかったら動かない.
			move_z = 0.0f;
		}
		move_x = Input.GetAxis ("Horizontal");	//回転量を取得.
		move_z *= MOVESPEED * Time.deltaTime;	//速さをかける.

		if (!playerController.isGrounded) {	//接地してなかったら落ちる.
			move_y -= GRAVITY * Time.deltaTime;
		}
		if (this.transform.position.y < -25.0f)	//落ちすぎてたら-25で止める.
			move_y = 0.0f;
		
		//相対的に前へ. 
		this.transform.Translate (new Vector3 (0, move_y, move_z));
		//相対回転.
		this.transform.Rotate(new Vector3 (0, 1, 0), move_x * Time.deltaTime * ROTATESPEED);
		playerAnimator.SetBool ("run", move_z > 0);	//前に進んでいたらrunアニメーションをtrue.
	}

	void displaySpeakButton(){
		speakbutton.gameObject.SetActive (true);
	}

	void hideSpeakButton(){
		speakbutton.gameObject.SetActive (false);
	}

	void OnTriggerStay(Collider other){
		GameObject other_go = other.gameObject;
		if (this.isFront (other_go)) {
			if (other_go.CompareTag ("Friend")) {
				closest = CLOSEST.FRIEND;
				displaySpeakButton ();
			} else if (other_go.CompareTag ("X")) {
				closest = CLOSEST.X;
				displaySpeakButton ();
			} else if (other_go.CompareTag ("Player1")) {
				closest = CLOSEST.PLAYER1;
				displaySpeakButton ();
			} else {
				closest = CLOSEST.NONE;
				hideSpeakButton ();
			}
		} else {
			closest = CLOSEST.NONE;
			hideSpeakButton ();
		}
	}
		
	void OnTriggerExit(){
		closest = CLOSEST.NONE;
	}

	bool isFront(GameObject go){
		bool ret = false;
		do{
			//向いてる方向を取得.
			Vector3 heading = this.transform.TransformDirection(Vector3.forward);
			//ゲームオブジェクトの方向を取得.
			Vector3 to_go = go.transform.position - this.transform.position;
			heading.y = 0.0f;
			to_go.y = 0.0f;
			heading.Normalize();
			to_go.Normalize();
			float dotProduct = Vector3.Dot(heading, to_go);
			if(dotProduct < Mathf.Cos(45.0f)){
				//２つの方向が45度以上なら抜ける.
				break;
			}
			ret = true;
		}while(false);
		return(ret);
	}
}

Answer 1

移動をthis.transform.translateで行っていたのが原因でした。

this.transform.Translate (new Vector3 (0, move_y, move_z));

の部分を

playerController.Move(new Vector3(0,move_y,0));
playerController.Move(new Vector3(this.transform.forward*move_z);

としたところうまく動作しました。