2dRogueLike源码分析Enemy

1.调用unity包using UnityEngine;
using System.Collections;2.定义enemy类继承于MovingObject
属性：给予玩家的伤害，动画控制，每次移动位置，是否跳过移动 //Enemy inherits from MovingObject, our base class for objects that can move, Player also inherits from this.
public class Enemy : MovingObject
{
public int playerDamage; //The amount of food points to subtract from the player when attacking.
private Animator animator; //Variable of type Animator to store a reference to the enemy's Animator component.
private Transform target; //Transform to attempt to move toward each turn.
private bool skipMove; //Boolean to determine whether or not enemy should skip a turn or move this turn.
3.将enemy加入gameManager
得到animator
找到player
执行父类的start函数 //Start overrides the virtual Start function of the base class.
protected override void Start ()
{
//Register this enemy with our instance of GameManager by adding it to a list of Enemy objects.
//This allows the GameManager to issue movement commands.
GameManager.instance.AddEnemyToList (this);

//Get and store a reference to the attached Animator component.
animator = GetComponent<Animator> ();

//Find the Player GameObject using it's tag and store a reference to its transform component.
target = GameObject.FindGameObjectWithTag ("Player").transform;

//Call the start function of our base class MovingObject.
base.Start ();
}4.重写AttemptMove函数
如果skipMove为真，则跳过 //Override the AttemptMove function of MovingObject to include functionality needed for Enemy to skip turns.
//See comments in MovingObject for more on how base AttemptMove function works.
protected override void AttemptMove <T> (int xDir, int yDir)
{
//Check if skipMove is true, if so set it to false and skip this turn.
if(skipMove)
{
skipMove = false;
return;
}

//Call the AttemptMove function from MovingObject.
base.AttemptMove <T> (xDir, yDir);

//Now that Enemy has moved, set skipMove to true to skip next move.
skipMove = true;
}5.根据player的位置，决定自己移动方向 //MoveEnemy is called by the GameManger each turn to tell each Enemy to try to move towards the player.
public void MoveEnemy ()
{
//Declare variables for X and Y axis move directions, these range from -1 to 1.
//These values allow us to choose between the cardinal directions: up, down, left and right.
int xDir = 0;
int yDir = 0;

//If the difference in positions is approximately zero (Epsilon) do the following:
if(Mathf.Abs (target.position.x - transform.position.x) < float.Epsilon)

//If the y coordinate of the target's (player) position is greater than the y coordinate of this enemy's position set y direction 1 (to move up). If not, set it to -1 (to move down).
yDir = target.position.y > transform.position.y ? 1 : -1;

//If the difference in positions is not approximately zero (Epsilon) do the following:
else
//Check if target x position is greater than enemy's x position, if so set x direction to 1 (move right), if not set to -1 (move left).
xDir = target.position.x > transform.position.x ? 1 : -1;

//Call the AttemptMove function and pass in the generic parameter Player, because Enemy is moving and expecting to potentially encounter a Player
AttemptMove <Player> (xDir, yDir);
}6.重写OnCantMove函数
   player损失food
   enemy执行enemyAttack动画 //OnCantMove is called if Enemy attempts to move into a space occupied by a Player, it overrides the OnCantMove function of MovingObject
//and takes a generic parameter T which we use to pass in the component we expect to encounter, in this case Player
protected override void OnCantMove <T> (T component)
{
//Declare hitPlayer and set it to equal the encountered component.
Player hitPlayer = component as Player;

//Call the LoseFood function of hitPlayer passing it playerDamage, the amount of foodpoints to be subtracted.
hitPlayer.LoseFood (playerDamage);

//Set the attack trigger of animator to trigger Enemy attack animation.
animator.SetTrigger ("enemyAttack");

}
}