using UnityEngine; using System.Collections; using System.Collections.Generic; using System.Linq; using UnityEngine.UI; using System;
public class Snake : MonoBehaviour { // Current Movement Direction // (by default it moves to the right) Vector2 dir = Vector2.right;
List tail = new List();
// Did the snake eat something? bool ate = false;
// Tail Prefab public GameObject tailPrefab;
public Action OnLose;
// Use this for initialization void Start() {
// Move the Snake every 300ms InvokeRepeating("Move", 0.3f, 0.3f); }
void OnTriggerEnter2D(Collider2D coll) { // Food? if (coll.name.StartsWith("food")) { // Get longer in next Move call ate = true;
// Remove the Food Destroy(coll.gameObject); } // Collided with Tail or Border else { OnLose(); } }
void Update() { // Move in a new Direction? if (Input.GetKey(KeyCode.RightArrow)) dir = Vector2.right; else if (Input.GetKey(KeyCode.DownArrow)) dir = -Vector2.up; // '-up' means 'down' else if (Input.GetKey(KeyCode.LeftArrow)) dir = -Vector2.right; // '-right' means 'left' else if (Input.GetKey(KeyCode.UpArrow)) dir = Vector2.up; }
void Move() { // Move head into new direction Vector2 v = transform.position;
transform.Translate(dir);
if (ate) { // Load Prefab into the world GameObject g = (GameObject)Instantiate(tailPrefab, v, Quaternion.identity);
// Keep track of it in our tail list tail.Insert(0, g.transform);
// Reset the flag ate = false; } // Do we have a Tail? else if (tail.Count > 0) { // Move last Tail Element to where the Head was tail.Last().position = v;
// Add to front of list, remove from the back tail.Insert(0, tail.Last()); tail.RemoveAt(tail.Count - 1); } } }
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