完美一半的鼠标操纵角色走

var GO:GameObject;
static var pointx:float;
static var pointy:float;
static var pointz:float;

function Start (){
    pointx=GO.transform.position.x;
    pointy=GO.transform.position.y;
    pointz=GO.transform.position.z;
}

function Update () {
    var ray = Camera.main.ScreenPointToRay (Input.mousePosition);
    var hit : RaycastHit;
    if (Physics.Raycast (ray, hit, 100)) {
        Debug.DrawLine (ray.origin, hit.point);
        print(hit.transform.name);
    }
    if(Input.GetKey(KeyCode.Mouse0)){
        pointx=hit.point[0];
        pointy=hit.point[1];
        pointz=hit.point[2];
    }
    if(Input.GetKey(KeyCode.W)){
        pointx=GO.transform.position.x;
        pointy=GO.transform.position.y;
        pointz=GO.transform.position.z;
    }
    if(Input.GetKey(KeyCode.S)){
        pointx=GO.transform.position.x;
        pointy=GO.transform.position.y;
        pointz=GO.transform.position.z;
    }
    if(Input.GetKey(KeyCode.A)){
        pointx=GO.transform.position.x;
        pointy=GO.transform.position.y;
        pointz=GO.transform.position.z;
    }
    if(Input.GetKey(KeyCode.D)){
        pointx=GO.transform.position.x;
        pointy=GO.transform.position.y;
        pointz=GO.transform.position.z;
    }

    if(Mathf.Round(pointx-GO.transform.position.x)>0){
        GO.transform.position.x+=2*Time.deltaTime;
    }
    else if(Mathf.Round(pointx-GO.transform.position.x)<0){
        GO.transform.position.x+=-2*Time.deltaTime;
    }

    if(Mathf.Round((pointy+GO.transform.localPosition.y)-GO.transform.position.y)>0){
        GO.transform.position.y+=1*Time.deltaTime;
    }
    else if(Mathf.Round((pointy+GO.transform.localPosition.y)-GO.transform.position.y)<0){
        GO.transform.position.y+=-1*Time.deltaTime;
    }

    if(Mathf.Round(pointz-GO.transform.position.z)>0){
        GO.transform.position.z+=2*Time.deltaTime;
    }
    else if(Mathf.Round(pointz-GO.transform.position.z)<0){
        GO.transform.position.z+=-2*Time.deltaTime;
    }

}