判断两个物体之间的距离的代码

王者再临

方法1

1. 01var aa:GameObject;//A
   
2. 
   
3. 02var bb:GameObject;//B
   
4. 
   
5. 03var dis: float;
   
6. 
   
7. 04function Update () {
   
8. 
   
9. 05  dis=Vector3.Distance(bb.transform.position,aa.transform.position);
   
10. 
    
11. 06}
    
12. 
    
13. 07
    
14. 
    
15. 08function OnGUI () {
    
16. 
    
17. 09  GUI.Label (Rect (10,40,200,20), dis + “m”);
    
18. 
    
19. 10}

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方法2

1. 01var startPoint:Vector3;
   
2. 
   
3. 02var endPoint:Vector3;
   
4. 
   
5. 03var showDistance:float = 0.0;
   
6. 
   
7. 04var isStart:boolean;
   
8. 
   
9. 05var isOver:boolean;
   
10. 
    
11. 06var isFollow:boolean;
    
12. 
    
13. 07var mLine:LineRenderer;
    
14. 
    
15. 08var aMaterial:Material;
    
16. 
    
17. 09var mx:float = 0.0;
    
18. 
    
19. 10var my:float = 0.0;
    
20. 
    
21. 11
    
22. 
    
23. 12function Start ()
    
24. 
    
25. 13{
    
26. 
    
27. 14   mLine = this.gameObject.AddComponent(LineRenderer);
    
28. 
    
29. 15   mLine.SetWidth(1, 1);
    
30. 
    
31. 16   mLine.SetVertexCount(2);
    
32. 
    
33. 17   mLine.SetColors (Color.yellow,Color.yellow);
    
34. 
    
35. 18   //aMaterial.color = Color.red;
    
36. 
    
37. 19   mLine.material = aMaterial;
    
38. 
    
39. 20   mLine.material.color = Color (0, 1, 0, 0.25);
    
40. 
    
41. 21   mLine.renderer.enabled = true;
    
42. 
    
43. 22}
    
44. 
    
45. 23
    
46. 
    
47. 24function Update () {
    
48. 
    
49. 25//print(Input.mousePosition);
    
50. 
    
51. 26if (Input.GetButtonDown (“Fire1”)) {
    
52. 
    
53. 27   showDistance = 0;
    
54. 
    
55. 28   startPoint = Vector3.zero;
    
56. 
    
57. 29   endPoint = Vector3.zero;
    
58. 
    
59. 30   isFollow = true;
    
60. 
    
61. 31   var sRay = camera.ScreenPointToRay (Input.mousePosition);
    
62. 
    
63. 32   var sHit : RaycastHit;
    
64. 
    
65. 33   if (Physics.Raycast (sRay,sHit)) {
    
66. 
    
67. 34    //Debug.DrawRay (ray.origin, ray.direction * 10, Color.yellow);
    
68. 
    
69. 35    //Debug.DrawLine (sRay.origin, sHit.point);
    
70. 
    
71. 36    startPoint = sHit.point;
    
72. 
    
73. 37    print(“startPoint:” +sHit.point);
    
74. 
    
75. 38    mLine.SetPosition(0,startPoint);
    
76. 
    
77. 39    isStart = true;
    
78. 
    
79. 40    isOver = false;
    
80. 
    
81. 41   }else{
    
82. 
    
83. 42    print(“”);
    
84. 
    
85. 43   }
    
86. 
    
87. 44}
    
88. 
    
89. 45
    
90. 
    
91. 46if(isStart && !isOver){
    
92. 
    
93. 47   var mRay = camera.ScreenPointToRay (Input.mousePosition);
    
94. 
    
95. 48   var mHit : RaycastHit;
    
96. 
    
97. 49   if (Physics.Raycast (mRay,mHit)) {
    
98. 
    
99. 50    endPoint = mHit.point;
    
100. 
     
101. 51    print(“mPoint:” +mHit.point);
     
102. 
     
103. 52    mLine.SetPosition(1,endPoint);
     
104. 
     
105. 53    showDistance = Vector3.Distance(endPoint,startPoint);
     
106. 
     
107. 54   }else{
     
108. 
     
109. 55    print(“”);
     
110. 
     
111. 56   }
     
112. 
     
113. 57}
     
114. 
     
115. 58
     
116. 
     
117. 59if (Input.GetButtonUp (“Fire1”)) {
     
118. 
     
119. 60   var eRay = camera.ScreenPointToRay (Input.mousePosition);
     
120. 
     
121. 61   var eHit : RaycastHit;
     
122. 
     
123. 62   isFollow = false;
     
124. 
     
125. 63   if (Physics.Raycast(eRay,eHit)) {
     
126. 
     
127. 64    //Debug.DrawRay (ray.origin, ray.direction * 10, Color.yellow);
     
128. 
     
129. 65    //Debug.DrawLine (eRay.origin, eHit.point);
     
130. 
     
131. 66    endPoint = eHit.point;
     
132. 
     
133. 67    print(“endPoint:” +eHit.point);
     
134. 
     
135. 68    isOver = true;
     
136. 
     
137. 69    isStart = false;
     
138. 
     
139. 70    showDistance = Vector3.Distance(endPoint,startPoint);
     
140. 
     
141. 71    //Debug.DrawLine (startPoint,endPoint, Color.red);
     
142. 
     
143. 72    mLine.SetPosition(1,endPoint);
     
144. 
     
145. 73   }else{
     
146. 
     
147. 74    print(“”);
     
148. 
     
149. 75   }
     
150. 
     
151. 76}
     
152. 
     
153. 77}
     
154. 
     
155. 78
     
156. 
     
157. 79
     
158. 
     
159. 80
     
160. 
     
161. 81
     
162. 
     
163. 82function OnGUI () {
     
164. 
     
165. 83//GUI.TextArea (Rect (300, 80, 50, 20), showDistance.ToString());
     
166. 
     
167. 84if(isFollow){
     
168. 
     
169. 85   mx = Input.mousePosition.x + 5;
     
170. 
     
171. 86   my = Screen.height-Input.mousePosition.y - 20;
     
172. 
     
173. 87}
     
174. 
     
175. 88GUI.Label(Rect (mx,my, 100, 20), showDistance.ToString() + “ M”);
     
176. 
     
177. 89}

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