Unity3D学习笔记-------小地图制作

　　制作小地图首先需要两个贴图：第一个贴图是小地图的背景贴图，它应当是从y轴向下俯视截取的贴图；第二个贴图是主角位置贴图，它应当是在背景贴图之上的小型矩形。

 1 using UnityEngine;
 2 using System.Collections;
 3 
 4 public class smallMap : MonoBehaviour {
 5     // Use this for initialization
 6     GameObject plane;  //大地图地形对象
 7     GameObject cube;   //大地图主角对象
 8     float mapWidth;    //大地图的宽度
 9     float mapHeight;   //大地图的高度
10     //地图边界检查
11     float widthCheck;
12     float heightCheck;
13     //小地图主角位置
14     float mapcube_x = 0;
15     float mapcube_y = 0;
16     //GUI按钮是否被按下
17     bool keyUp;
18     bool keyDown;
19     bool keyLeft;
20     bool keyRight;
21 
22     public Texture map;   //小地图的贴图
23     public Texture map_cube;    //小地图的主角贴图
24     void Start () {
25         plane = GameObject.Find("Plane");
26         cube = GameObject.Find("Cube");
27         float size_x = plane.GetComponent<MeshFilter>().mesh.bounds.size.x;  //得到大地图的默认宽度
28         float scale_x = plane.transform.localScale.x;   //得到大地图宽度的缩放比例
29         float size_z = plane.GetComponent<MeshFilter>().mesh.bounds.size.z;  //得到大地图的默认高度
30         float scale_z = plane.transform.localScale.z;   //得到大地图高度的缩放比例
31         mapWidth = size_x * scale_x;
32         mapHeight = size_z * scale_z;
33         widthCheck = mapWidth / 2;
34         heightCheck = mapHeight / 2;
35         check();
36     }
37     
38     // Update is called once per frame
39     void Update () {
40     
41     }
42 
43     void OnGUI() {
44         keyUp = GUILayout.RepeatButton("向前移动");
45         keyDown = GUILayout.RepeatButton("向后移动");
46         keyRight = GUILayout.RepeatButton("向右移动");
47         keyLeft = GUILayout.RepeatButton("向左移动");
48         GUI.DrawTexture(new Rect(Screen.width - map.width, 0, map.width, map.height), map);
49         GUI.DrawTexture(new Rect(mapcube_x, mapcube_y, map_cube.width, map_cube.height), map_cube);
50     }
51 
52     void FixedUpdate() {
53         if (keyUp) {
54             cube.transform.Translate(Vector3.forward * Time.deltaTime * 5);
55             check();
56         }
57         if (keyDown) {
58             cube.transform.Translate(-Vector3.forward * Time.deltaTime * 5);
59             check();
60         }
61         if (keyRight) {
62             cube.transform.Translate(Vector3.right * Time.deltaTime * 5);
63             check();
64         }
65         if (keyLeft) {
66             cube.transform.Translate(Vector3.left * Time.deltaTime * 5);
67             check();
68         }
69     }
70 
71     void check() {
72         float x = cube.transform.position.x;
73         float z = cube.transform.position.z;
74         if (x < -widthCheck) {
75             x = -widthCheck;
76         }
77         if (x > widthCheck) {
78             x = widthCheck;
79         }
80         if (z < -heightCheck) {
81             z = -heightCheck;
82         }
83         if (z > heightCheck) {
84             z = heightCheck;
85         }
86         mapcube_x = (map.width / mapWidth * x) + ((map.width / 2) - (map_cube.width / 2)) + (Screen.width - map.width);
87         mapcube_y = map.height - ((map.height / mapHeight * z) + (map.height / 2));
88     }
89 }