选择一个敌人，按ctrl+d，复制出3个，调整一下它们的位置，不重叠，修改Tag为Enemy，禁用EnemyAI。
创建Targetting脚本，绑定到Player玩家对象
public class Targetting : MonoBehaviour {
public List<Transform> targets;
public Transform selectedTarget;
// Use this for initialization
void Start () {
targets = new List<Transform> ();
AddAllEnemies ();
}
public void AddAllEnemies(){
GameObject[] go = GameObject.FindGameObjectsWithTag ("Enemy");
foreach (GameObject enemy in go) {
targets.Add(enemy.transform);
}
}
public void SelectTarget(){
selectedTarget = targets [];
}
// Update is called once per frame
void Update () {
if (Input.GetKeyUp (KeyCode.Tab)) {
SelectTarget ();
}
}
}
运行查看属性如下
当按Tab时，第一个敌人被获取到SelectedTarget中
下面完善Tab键选敌人功能：
1. 假如已选敌人为null，那么选择最近敌人，并将已选敌人的材质的颜色改为红色。
2. 假如已选敌人不为null，那么按Tab将选择当前已选的下一个敌人（按距离排序），将之前选的敌人颜色改成绿色，新选的改成红色。
3. 在选择敌人完成后，调用Player的PlayerAttack组件，给它的target赋值。完整如下：
public class Targetting : MonoBehaviour {
public List<Transform> targets;
public Transform selectedTarget;
public Transform myTransform;
// Use this for initialization
void Start () {
targets = new List<Transform> ();
AddAllEnemies ();
myTransform = transform;
}
public void AddAllEnemies(){
GameObject[] go = GameObject.FindGameObjectsWithTag ("Enemy");
foreach (GameObject enemy in go) {
targets.Add(enemy.transform);
}
}
//按距离排序敌人
public void SortTargetByDistance(){
targets.Sort (delegate(Transform t1, Transform t2){
return Vector3.Distance(t1.position,myTransform.position).CompareTo(Vector3.Distance(t2.position, myTransform.position));
});
}
//选择敌人
public void SelectEnemy(){
if (selectedTarget == null) {
SortTargetByDistance ();
selectedTarget = targets [];
}
else {
int index = targets.IndexOf(selectedTarget);
if(index < targets.Count - ){
index++;
}else{
index = ;
}
//删除之前选择的敌人
DeleteTarget();
selectedTarget = targets[index];
}
//已选择敌人
SelectTarget();
}
private void SelectTarget(){
selectedTarget.renderer.material.color = Color.red;
//给攻击组件赋值，切换当前攻击的敌人
PlayerAttack pa = (PlayerAttack)GetComponent ("PlayerAttack");
pa.target = selectedTarget.gameObject;
}
private void DeleteTarget(){
selectedTarget.renderer.material.color = Color.blue;
}
// Update is called once per frame
void Update () {
if (Input.GetKeyUp (KeyCode.Tab)) {
SelectEnemy ();
}
}
}