Unity中制作放大镜 效果

原帖地址见底部
其实和 小地图都差不多了。  还是要借助 另一个相机


目的: 这篇文章的主要目的是  要给你一个想法  如何做放大境效果 。


在unity中可以简单的实现放大镜效果啊 . 那么现在就来一步一步实现这个：


1：创建一个摄像机对象，设置 projection 类型为 perspective 或者 orthographic.


2：设置相机的 orthographicSize 或者 fieldOfView   (依赖于相机的 projection 类型 ).        


3：设置其 pixelrect  . 例如如果您想要在你鼠标位置显示放大境  和其大小是 100 x 100 , 然后设置pixelrect 为 :


magnifyCamera.pixelRect = new Rect (Input.mousePosition.x – 100f / 2.0f, Input.mousePosition.y – 100f / 2.0f, 100f, 100f);
设置相机的位置。  例如 如果你想在 你的鼠标位置显示放大镜效果  ，那么设置相机的位置为 mousePosition世界点。


你能看到最终的效果图：



下面的 C# 脚本将创建一个  MagnifyGlass，并将它移动到 mousePosition位置 。MagnifyGlass 脚本:   添加到一个空的游戏对象。

1. using UnityEngine;
   
2. using System.Collections;
   
3. 
   
4. public class MagnifyGlass : MonoBehaviour
   
5. {
   
6. private Camera magnifyCamera;
   
7. private GameObject magnifyBorders;
   
8. private LineRenderer LeftBorder, RightBorder, TopBorder, BottomBorder; // Reference for lines of magnify glass borders
   
9. private float MGOX,MG0Y; // Magnify Glass Origin X and Y position
   
10. private float MGWidth = Screen.width/5f,MGHeight = Screen.width/5f; // Magnify glass width and height
    
11. private Vector3 mousePos;
    
12. 
    
13. void Start ()
    
14. {
    
15. createMagnifyGlass ();
    
16. }
    
17. void Update ()
    
18. {
    
19. // Following lines set the camera's pixelRect and camera position at mouse position
    
20. magnifyCamera.pixelRect = new Rect (Input.mousePosition.x - MGWidth / 2.0f, Input.mousePosition.y - MGHeight / 2.0f, MGWidth, MGHeight);
    
21. mousePos = getWorldPosition (Input.mousePosition);
    
22. magnifyCamera.transform.position = mousePos;
    
23. mousePos.z = 0;
    
24. magnifyBorders.transform.position = mousePos;
    
25. }
    
26. 
    
27. // Following method creates MagnifyGlass
    
28. private void createMagnifyGlass()
    
29. {
    
30. GameObject camera = new GameObject("MagnifyCamera");
    
31. MGOX = Screen.width / 2f - MGWidth/2f;
    
32. MG0Y = Screen.height / 2f - MGHeight/2f;
    
33. magnifyCamera = camera.AddComponent<Camera>();
    
34. magnifyCamera.pixelRect = new Rect(MGOX, MG0Y, MGWidth, MGHeight);
    
35. magnifyCamera.transform.position = new Vector3(0,0,0);
    
36. if(Camera.main.isOrthoGraphic)
    
37. {
    
38. magnifyCamera.orthographic = true;
    
39. magnifyCamera.orthographicSize = Camera.main.orthographicSize / 5.0f;//+ 1.0f;
    
40. createBordersForMagniyGlass ();
    
41. }
    
42. else
    
43. {
    
44. magnifyCamera.orthographic = false;
    
45. magnifyCamera.fieldOfView = Camera.main.fieldOfView / 10.0f;//3.0f;
    
46. }
    
47. 
    
48. }
    
49. 
    
50. // Following method sets border of MagnifyGlass
    
51. private void createBordersForMagniyGlass()
    
52. {
    
53. magnifyBorders = new GameObject ();
    
54. LeftBorder = getLine ();
    
55. LeftBorder.SetVertexCount(2);
    
56. LeftBorder.SetPosition(0,new Vector3(getWorldPosition(new Vector3(MGOX,MG0Y,0)).x,getWorldPosition(new Vector3(MGOX,MG0Y,0)).y-0.1f,-1));
    
57. LeftBorder.SetPosition(1,new Vector3(getWorldPosition(new Vector3(MGOX,MG0Y+MGHeight,0)).x,getWorldPosition(new Vector3(MGOX,MG0Y+MGHeight,0)).y+0.1f,-1));
    
58. LeftBorder.transform.parent = magnifyBorders.transform;
    
59. TopBorder = getLine ();
    
60. TopBorder.SetVertexCount(2);
    
61. TopBorder.SetPosition(0,new Vector3(getWorldPosition(new Vector3(MGOX,MG0Y+MGHeight,0)).x,getWorldPosition(new Vector3(MGOX,MG0Y+MGHeight,0)).y,-1));
    
62. TopBorder.SetPosition(1,new Vector3(getWorldPosition(new Vector3(MGOX+MGWidth,MG0Y+MGHeight,0)).x,getWorldPosition(new Vector3(MGOX+MGWidth,MG0Y+MGHeight,0)).y,-1));
    
63. TopBorder.transform.parent = magnifyBorders.transform;
    
64. RightBorder = getLine ();
    
65. RightBorder.SetVertexCount(2);
    
66. RightBorder.SetPosition(0,new Vector3(getWorldPosition(new Vector3(MGOX+MGWidth,MG0Y+MGWidth,0)).x,getWorldPosition(new Vector3(MGOX+MGWidth,MG0Y+MGWidth,0)).y+0.1f,-1));
    
67. RightBorder.SetPosition(1,new Vector3(getWorldPosition(new Vector3(MGOX+MGWidth,MG0Y,0)).x,getWorldPosition(new Vector3(MGOX+MGWidth,MG0Y,0)).y-0.1f,-1));
    
68. RightBorder.transform.parent = magnifyBorders.transform;
    
69. BottomBorder = getLine ();
    
70. BottomBorder.SetVertexCount(2);
    
71. BottomBorder.SetPosition(0,new Vector3(getWorldPosition(new Vector3(MGOX+MGWidth,MG0Y,0)).x,getWorldPosition(new Vector3(MGOX+MGWidth,MG0Y,0)).y,-1));
    
72. BottomBorder.SetPosition(1,new Vector3(getWorldPosition(new Vector3(MGOX,MG0Y,0)).x,getWorldPosition(new Vector3(MGOX,MG0Y,0)).y,-1));
    
73. BottomBorder.transform.parent = magnifyBorders.transform;
    
74. }
    
75. 
    
76. // Following method creates new line for MagnifyGlass's border
    
77. private LineRenderer getLine()
    
78. {
    
79. LineRenderer line = new GameObject("Line").AddComponent<LineRenderer>();
    
80. line.material = new Material(Shader.Find("Diffuse"));
    
81. line.SetVertexCount(2);
    
82. line.SetWidth(0.2f,0.2f);
    
83. line.SetColors(Color.black, Color.black);
    
84. line.useWorldSpace = false;
    
85. return line;
    
86. }
    
87. private void setLine(LineRenderer line)
    
88. {
    
89. line.material = new Material(Shader.Find("Diffuse"));
    
90. line.SetVertexCount(2);
    
91. line.SetWidth(0.2f,0.2f);
    
92. line.SetColors(Color.black, Color.black);
    
93. line.useWorldSpace = false;
    
94. }
    
95. 
    
96. // Following method calculates world's point from screen point as per camera's projection type
    
97. public Vector3 getWorldPosition(Vector3 screenPos)
    
98. {
    
99. Vector3 worldPos;
    
100. if(Camera.main.isOrthoGraphic)
     
101. {
     
102. worldPos = Camera.main.ScreenToWorldPoint (screenPos);
     
103. worldPos.z = Camera.main.transform.position.z;
     
104. }
     
105. else
     
106. {
     
107. worldPos = Camera.main.ScreenToWorldPoint (new Vector3 (screenPos.x, screenPos.y, Camera.main.transform.position.z));
     
108. worldPos.x *= -1;
     
109. worldPos.y *= -1;
     
110. }
     
111. return worldPos;
     
112. }
     
113. }

点击此处复制文本

原帖地址：http://www.manew.com/thread-42935-1-1.html

666666666666666666666666666

想要成大触，天天上元素！

资源发布哪家强？元素首发称大王！

元素帖子强，满满正能量！

带你赚币带你飞，元素里面有正妹！

元素那么大，我想来看看！

为了元素币，拼了！

给力！元素有你更精彩

元素那么大，我想来看看！

想要成大触，天天上元素！

带你赚币带你飞，元素里面有正妹！

元素那么大，我想来看看！

楼主给你32个赞

666

给力！元素有你更精彩

想要成大触，天天上元素！

元素帖子强，满满正能量！

元素帖子强，满满正能量！