PlayerFollow.cs

using UnityEngine;
using System.Collections;

public class PlayerFollow : MonoBehaviour
{
	public Transform target;           
	public float smoothing = 5f;       

	Vector3 offset;                     
	Camera camera;
	LayerMask floorMask;
	float camRayLength = 100f;          // The length of the ray from the camera into the scene.
	void Start ()
	{
		// Calculate the initial offset.
		offset = new Vector3(0,10,-10);
		gameObject.transform.eulerAngles = (new Vector3(45f,0f,0f));
		camera = gameObject.GetComponent<Camera>();
		floorMask = LayerMask.GetMask ("Floor");
	}

	void Update ()
	{
		if(target != null) {
			Vector3 targetCamPos = target.position + offset;

			//transform.position = Vector3.Lerp (transform.position, targetCamPos, smoothing * Time.deltaTime);
			// Create a ray from the mouse cursor on screen in the direction of the camera.
			Ray camRay = camera.ScreenPointToRay (Input.mousePosition);
			// Create a RaycastHit variable to store information about what was hit by the ray.
			RaycastHit floorHit;

			// Perform the raycast and if it hits something on the floor layer...
			if(Physics.Raycast (camRay, out floorHit, camRayLength, floorMask))
			{
				// Create a vector from the player to the point on the floor the raycast from the mouse hit.
				targetCamPos = ((floorHit.point+target.position)/2);
				targetCamPos.y = 10;
				Debug.Log(floorHit.point);
				Debug.Log(target.position);
				Debug.Log(targetCamPos);

			}
			transform.position = Vector3.Lerp (transform.position, (targetCamPos) + offset, smoothing * Time.deltaTime);
		

		}
	}
}