Unity 编辑器扩展 Chapter2—Gizmos
2017-02-14 23:01
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二. 使用Gizoms绘制网格及矩阵转换使用
1. 创建Leve类，作为场景控制类：
1 using UnityEngine;
2 //使用namespace方便脚本管理
3 namespace RunAndJump {
4 //使用部分类partial将类依据不同的功能分布到各个文件中，便于功能区分个管理
5 public partial class Level : MonoBehaviour {
6 [SerializeField]
7 public int _totalTime = 60;
8 [SerializeField]
9 private float _gravity = -30;
10 [SerializeField]
11 private AudioClip _bgm;
12 [SerializeField]
13 private Sprite _background;
14
15 [SerializeField]
16 private int _totalColumns = 25;
17
18 [SerializeField]
19 private int _totalRows = 10;
20
21 public const float GridSize = 1.28f;
22
23 private readonly Color _normalColor = Color.grey;
24 private readonly Color _selectedColor = Color.yellow;
25 public int TotalTime {
26 get { return _totalTime; }
27 set { _totalTime = value; }
28 }
29
30 public float Gravity {
31 get { return _gravity; }
32 set { _gravity = value; }
33 }
34
35 public AudioClip Bgm {
36 get { return _bgm;}
37 set { _bgm = value; }
38 }
39
40 public Sprite Background {
41 get { return _background; }
42 set { _background = value; }
43 }
44
45 public int TotalColumns
46 {
47 get
48 {
49 return _totalColumns;
50 }
51
52 set
53 {
54 _totalColumns = value;
55 }
56 }
57
58 public int TotalRows
59 {
60 get
61 {
62 return _totalRows;
63 }
64
65 set
66 {
67 _totalRows = value;
68 }
69 }
70
71 //绘制边界
72 private void GridFrameGizmo(int cols, int rows)
73 {
74 Gizmos.DrawLine(new Vector3(0,0,0),new Vector3(0,rows*GridSize,0) );
75 Gizmos.DrawLine(new Vector3(0, 0, 0), new Vector3(cols*GridSize,0, 0));
76 Gizmos.DrawLine(new Vector3(cols*GridSize, 0, 0), new Vector3(cols*GridSize, rows * GridSize, 0));
77 Gizmos.DrawLine(new Vector3(0, rows*GridSize, 0), new Vector3(cols*GridSize, rows * GridSize, 0));
78 }
79
80 //绘制内部线条
81 private void GridGizmos(int cols, int rows)
82 {
83 for (int i = 0; i < cols; i++)
84 {
85 Gizmos.DrawLine(new Vector3(i*GridSize,0,0),new Vector3(i*GridSize,rows*GridSize,0) );
86 }
87
88 for (int j = 0; j < rows; j++)
89 {
90 Gizmos.DrawLine(new Vector3(0,j * GridSize, 0), new Vector3(cols * GridSize, j * GridSize, 0));
91 }
92 }
93
94 //D使用unity默认的OnDrawGizmos方法来绘制Gzimos
95 private void OnDrawGizmos()
96 {
97 Color oldColor = Gizmos.color;//修改的这些属性都是静态属性，所以要在修改前保存其值，修改后再复原，防止后续使用该静态属性是修改后的
98 Matrix4x4 oldMatrix = Gizmos.matrix;//修改的这些属性都是静态属性，所以要在修改前保存其值，修改后再复原，防止后续使用该静态属性是修改后的
99 Gizmos.matrix = transform.localToWorldMatrix;//该语句可以为gizmos提供该transform位移，旋转，缩放等特性
100
101 Gizmos.color = _normalColor;
102 GridGizmos(_totalColumns,_totalRows);
103 GridFrameGizmo(_totalColumns,_totalRows);
104
105 Gizmos.color = oldColor;//恢复修改后的静态属性
106 Gizmos.matrix = oldMatrix;//恢复修改后的静态属性
107 }
108
109 private void OnDrawGizmosSelected()
110 {
111 Color oldColor = Gizmos.color;
112 Matrix4x4 oldMatrix = Gizmos.matrix;
113 Gizmos.matrix = transform.localToWorldMatrix;
114
115
116 Gizmos.color = _selectedColor;
117 GridFrameGizmo(_totalColumns, _totalRows);
118
119 Gizmos.color = oldColor;
120 Gizmos.matrix = oldMatrix;
121
122 }
123
124 /// <summary>
125 /// 将世界坐标转换为grid网格中的点坐标
126 /// </summary>
127 /// <param name="point">世界坐标</param>
128 /// <returns></returns>
129 public Vector3 WordToGridCoordinates(Vector3 point)
130 {
131 Vector3 gridPoint=new Vector3((int)((point.x-transform.position.x)/GridSize),(int)((point.y-transform.position.y)/GridSize),0.0f);
132 return gridPoint;
133 }
134
135 /// <summary>
136 /// Grid网格中的位置转换为世界坐标坐标
137 /// </summary>
138 /// <param name="col">行值</param>
139 /// <param name="row">列值</param>
140 /// <returns></returns>
141 public Vector3 GridToWordCoordinates(int col,int row)
142 {
143 Vector3 wordPoint=new Vector3(transform.position.x+(col*GridSize/2.0f),transform.position.y+(row*GridSize/2.0f),0.0f);
144 return wordPoint;
145 }
146 /// <summary>
147 /// 坐标位置是否在网格边界内
148 /// </summary>
149 /// <param name="point"></param>
150 /// <returns></returns>
151 public bool IsInsideGridBounds(Vector3 point)
152 {
153 float minX = transform.position.x;
154 float maxX = minX + _totalColumns*GridSize;
155 float minY = transform.position.y;
156 float maxY = minY + _totalRows*GridSize;
157 return (point.x >= minX && point.x <= maxX && point.y >= minY && point.y <= maxY);
158 }
159
160 /// <summary>
161 /// 坐标位置是否在网格边界内
162 /// </summary>
163 /// <param name="point"></param>
164 /// <returns></returns>
165
166 public bool IsInsideGridBounds(int col,int row)
167 {
168 return (col>=0&&col<_totalColumns&&row>=0&&row<=_totalRows);
169 }
170 }
171 }2. 创建EditorUtil类，作为辅助工具类：
1 using UnityEngine;
2 using System.Collections;
3 using UnityEditor;
4 using UnityEditor.SceneManagement;
5
6 namespace RunAndJump.LevelCreator //为防止类名冲突，使用namespace时一个好的解决方案
7 {
8 public class EditorUtil
9 {
10
11 //创建新场景
12 public static void NewScene()
13 {
14 //该方法后续过时，被下面方法替代：EditorApplication.SaveCurrentSceneIfUserWantsTo();
15 EditorSceneManager.SaveCurrentModifiedScenesIfUserWantsTo();//当前场景有未保存的东西是，弹出对话框提醒是否保存当前场景
16 //该方法后续过时，被下面方法替代：EditorApplication.NewScene();
17 EditorSceneManager.NewScene(NewSceneSetup.EmptyScene);
18 }
19
20
21 //清空场景
22 public static void CleanScene()
23 {
24 GameObject[] allObjects = Object.FindObjectsOfType<GameObject>();
25
26 foreach (GameObject go in allObjects)
27 {
28 GameObject.DestroyImmediate(go);
29 }
30 }
31
32 //创建新关卡
33 public static void NewLevel()
34 {
35 NewScene();
36 CleanScene();
37
38 //可以在创建新关卡时添加上必要的游戏对象
39 //add something...
40
41 GameObject levelGo = new GameObject("Level");
42 levelGo.transform.position=Vector3.zero;
43 levelGo.AddComponent<Level>();
44
45 }
46 }
47 }3. 创建MenuItems类，作为编辑器菜单工具类：
1 using UnityEngine;
2 using System.Collections;
3 using UnityEditor;
4
5 namespace RunAndJump.LevelCreator
6 {
7
8 //菜单项管理类，用来控制扩展方法在菜单项中显示
9 public class MenuItems
10 {
11 [MenuItem("Tools/LevelCreator/NewLevelScene %q") ]
12 private static void NewLevel()
13 {
14 EditorUtil.NewLevel();
15 }
16 }
17 }4. 创建SnapToGridTest类，用来测试Leve类中方法：
1 using UnityEngine;
2 using System.Collections;
3 using RunAndJump;
4
5 [ExecuteInEditMode]//在editor场景模式下不用运行就调用
6 public class SnapToGridTest : MonoBehaviour {
7
8 // Update is called once per frame
9 void Update ()
10 {
11 print(name+" in level");
12 Vector3 gridCoord = Level.Instance.WordToGridCoordinates(transform.position);
13 transform.position = Level.Instance.GridToWordCoordinates((int) gridCoord.x, (int) gridCoord.y);
14 }
15
16 private void OnDrawGizmos()
17 {
18 print("gizoms");
19 Color oldColor = Gizmos.color;
20 Gizmos.color = (Level.Instance.IsInsideGridBounds(transform.position)) ? Color.green : Color.red;
21 Gizmos.DrawCube(transform.position,Vector3.one*Level.GridSize);
22 Gizmos.color = oldColor;
23 }
24 }效果：
我们通过MenuItems创建的菜单调用EditorUtil中创建场景的方法，场景中在OnDrawGizoms方法中绘制出自己的网格。现在创建一个空物体为其绑上SnapToGridTest脚本用来验证level中用来对齐坐标到网格和验证是否出界的方法。
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