How can i add a collision detection for a character controller?

The problem is that my scripts work fine, except that the character walks trhough geometry even though it has a character controller attachhed to it. I have two scripts. One named TP_Motor, and the other TP_Controller. Here are the scripts: TP_Motor

using UnityEngine; using System.Collections;

public class TP_Motor : MonoBehaviour { public static TP_Motor Instance;

 public float movementSpeed = 10;
 public float backwardSpeed = 5;
 public float Gravity = 40f;
 public float TerminalVelocity = 20f;

 
 private Vector3 slideDirection;
 
 public float turningSpeed = 60;
 public float MoveSpeed = 10f;
 public float JumpSpeed = 14f;
 public Vector3 MoveVector { get; set; }
 public float VerticalVelocity { get; set; }
 

 void Update() 
 {
     Instance = this;
 }
 
 public void UpdateMotor() 
 {
      
     
     SnapAlignCharacterWithCamera();
     Moveandrotate();        
     ProcessMotion();
 }
 
 void Moveandrotate() // Esto hace que el jugador se mueva y rote.
     
     {
     float horizontal = Input.GetAxis("Horizontal") * turningSpeed * Time.deltaTime;
     transform.Rotate(0, horizontal, 0);
     
     
     float vertical = Input.GetAxis("Vertical") * movementSpeed * Time.deltaTime;
     transform.Translate(0, 0, vertical);
 }
 
 void ProcessMotion()
 {
     // Transform MoveVector to World Space
     MoveVector = transform.TransformDirection(MoveVector);
     
     // Normalize MoveVector if Magnitude > 1
     if (MoveVector.magnitude > 1)
         MoveVector = Vector3.Normalize(MoveVector);
     
     // Multiply MoveVector by MoveSpeed Esto hace que se mueva de derecha a izquierda
     MoveVector *= MoveSpeed;
     
     // Reapply VerticalVelocity MoveVector.y
         MoveVector = new Vector3(MoveVector.x, VerticalVelocity , MoveVector.z);
     
     // ApplyGravity
     ApplyGravity();
     
     // Move Character in World Space Esto tambien hace que se mueva de derecha a izquierda
     TP_Controller.CharacterController.Move(MoveVector * Time.deltaTime);
 }
 
 void ApplyGravity()
 {
     if (MoveVector.y > -TerminalVelocity)
         MoveVector = new Vector3(MoveVector.x, MoveVector.y - Gravity * Time.deltaTime, MoveVector.z);
     
     if(TP_Controller.CharacterController.isGrounded && MoveVector.y < -1)
         MoveVector = new Vector3(MoveVector.x, -1 , MoveVector.z);
         
 }
 
 public void Jump()
 {
     if (TP_Controller.CharacterController.isGrounded)
         VerticalVelocity = JumpSpeed;
 }
 
 void SnapAlignCharacterWithCamera()
 {
 
 }

}

AND THE TP_Controller

using UnityEngine; using System.Collections;

public class TP_Controller : MonoBehaviour { public static CharacterController CharacterController; public static TP_Controller Instance; public float MoveSpeed = 10f;

 void Awake() 
 {
     CharacterController = GetComponent();
     Instance = this;
 }
 
 void Update() 
 {
     if(Camera.mainCamera == null)
         return;
     
     GetLocomotionInput();
     HandleActionInput();
     
     TP_Motor.Instance.UpdateMotor();
 }
 
 
 void GetLocomotionInput()
 {
     var deadZone = 0.1f;
     
     TP_Motor.Instance.VerticalVelocity = TP_Motor.Instance.MoveVector.y; // Gravedad
     
     TP_Motor.Instance.MoveVector = Vector3.zero;
     
     if (Input.GetAxis("Vertical") > deadZone || Input.GetAxis("Vertical") < -deadZone)
         TP_Motor.Instance.MoveVector += new Vector3(0, 0, Input.GetAxis("Vertical"));
     
 }
 
 void HandleActionInput() // Esto hace junto con jump que se accione con un boton el Jump
 {
     if (Input.GetButton("Jump"))
     {
         Jump ();
     }
 }
 
 void Jump()
 {
     TP_Motor.Instance.Jump ();
 }

}