Flying Controls Collision Issues

Hi

I am a student working on a new project using unity. I am quite new to it and am having a slight issue with collision when using a flying control script I have obtained. I have tried almost every possibility of using Rigidbodies/controllers/colliders on the character/game object but having absolutely no joy. I have also tried calling various functions - void OnTriggerEnter( Collider col ).

The closest I have came to the collision working is the character colliding with a game object but then bouncing off and floating about.

Below is the code for the flying controller script.

Any help/fix/advice would be much appreciated, I desperately need a solution! I have the unity scene files that I can email to anyone if necessary.

Kind Regards Adam

 **#pragma strict**
    
     var mainSpeed : float = 100.0; //regular speed
     var shiftAdd : float = 250.0; //multiplied by how long shift is held.  Basically running
     var maxShift : float = 1000.0; //Maximum speed when holdin gshift
     var camSens : float = 0.25; //How sensitive it with mouse
     private var lastMouse = Vector3(255, 255, 255); //kind of in the middle of the screen, rather than at the top (play)
     private var totalRun : float  = 1.0;
      
     function Update () {
         lastMouse = Input.mousePosition - lastMouse ;
         lastMouse = Vector3(-lastMouse.y * camSens, lastMouse.x * camSens, 0 );
         lastMouse = Vector3(transform.eulerAngles.x + lastMouse.x , transform.eulerAngles.y + lastMouse.y, 0);
         transform.eulerAngles = lastMouse;
         lastMouse =  Input.mousePosition;
         //Mouse & camera angle done.  
        
         //Keyboard commands
         var f : float = 0.0;
         var p = GetBaseInput();
         if (Input.GetKey (KeyCode.LeftShift)){
             totalRun += Time.deltaTime;
             p  = p * totalRun * shiftAdd;
             p.x = Mathf.Clamp(p.x, -maxShift, maxShift);
             p.y = Mathf.Clamp(p.y, -maxShift, maxShift);
             p.z = Mathf.Clamp(p.z, -maxShift, maxShift);
         }
         else{
             totalRun = Mathf.Clamp(totalRun * 0.5, 1, 1000);
             p = p * mainSpeed;
         }
        
         p = p * Time.deltaTime;
         if (Input.GetKey(KeyCode.Space)){ //If player wants to move on X and Z axis only
             f = transform.position.y;
             transform.Translate(p);
             transform.position.y = f;
         }
         else{
             transform.Translate( p);
         }
        
     }
      
     private function GetBaseInput() : Vector3 { //returns the basic values, if it's 0 than it's not active.
         var p_Velocity : Vector3;
         if (Input.GetKey (KeyCode.W)){
             p_Velocity += Vector3(0, 0 , 1);
         }
         if (Input.GetKey (KeyCode.S)){
             p_Velocity += Vector3(0, 0 , -1);
         }
         if (Input.GetKey (KeyCode.A)){
             p_Velocity += Vector3(-1, 0 , 0);
         }
         if (Input.GetKey (KeyCode.D)){
             p_Velocity += Vector3(1, 0 , 0);
         }
         return p_Velocity;
     }