Unity3D开发之利用LineRenderer画曲线

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unity3d开发之利用LineRenderer画曲线

1. using UnityEngine;
   
2. 
   
3. using System.Collections;
   
4. 
   
5. using System.Collections.Generic;
   
6. 
   
7. public class LinearDrawLine: MonoBehaviour {
   
8. 
   
9. private int pointCnt = 0;
   
10. 
    
11. public Color c1 = Color.red;
    
12. 
    
13. public Color c2 = Color.blue;
    
14. 
    
15. private LineRenderer lineRenderer;
    
16. 
    
17. private Vector3 screenPoint;
    
18. 
    
19. private Vector3 scanPos;
    
20. 
    
21. private Vector3 first_pos = Vector3.zero;
    
22. 
    
23. void Start () {
    
24. 
    
25. scanPos = gameObject.transform.position;
    
26. 
    
27. lineRenderer = (LineRenderer)gameObject.GetComponent(“LineRenderer”);
    
28. 
    
29. lineRenderer.material = new Material (Shader.Find(“Particles/Additive”));
    
30. 
    
31. lineRenderer.SetColors(c1, c2);
    
32. 
    
33. lineRenderer.SetWidth(0.02F, 0.02F);
    
34. 
    
35. lineRenderer.SetVertexCount(0);
    
36. 
    
37. }
    
38. 
    
39. void Update()
    
40. 
    
41. {
    
42. 
    
43. }
    
44. 
    
45. void OnMouseDown(){
    
46. 
    
47. Vector3 mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
    
48. 
    
49. screenPoint = Camera.main.WorldToScreenPoint(scanPos);
    
50. 
    
51. Vector3 curScreenPoint = new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenPoint.z);
    
52. 
    
53. Vector3 curPosition = Camera.main.ScreenToWorldPoint(curScreenPoint);
    
54. 
    
55. pointCnt = 0;
    
56. 
    
57. DrawRenderLine(lineRenderer, curPosition);
    
58. 
    
59. first_pos = curPosition;
    
60. 
    
61. }
    
62. 
    
63. void OnMouseDrag(){
    
64. 
    
65. iTween.ScaleFrom(gameObject,iTween.Hash(“x”,2,“y”,2,“z”,2,“time”,.1,“easetype”,“linear”));
    
66. 
    
67. Vector3 curScreenPoint = new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenPoint.z);
    
68. 
    
69. Vector3 curPosition = Camera.main.ScreenToWorldPoint(curScreenPoint);
    
70. 
    
71. DrawRenderLine(lineRenderer, curPosition);
    
72. 
    
73. }
    
74. 
    
75. void DrawRenderLine(LineRenderer line, Vector3 vect3){
    
76. 
    
77. if((Mathf.Abs(first_pos.x - vect3.x) < 0.1) && (Mathf.Abs(first_pos.y - vect3.y) < 0.1))
    
78. 
    
79. return;
    
80. 
    
81. first_pos = vect3;
    
82. 
    
83. line.SetVertexCount(++pointCnt);
    
84. 
    
85. line.SetPosition(pointCnt-1, vect3);
    
86. 
    
87. print(“new point: ”+vect3+“+”+pointCnt);
    
88. 
    
89. }
    
90. 
    
91. }

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