就unity3d动画系统的动画曲线描绘，我在网上找到一篇文章，虽然简单，但我觉得还是比较实用的，现在分享给大家。

在Unity3D中，编辑Transform动画曲线，看不到GameObject的运动路线。我写了个脚本，挂到有动画的GameObject上，就能显示运行动画时的路线了。

效果如下：

1. using UnityEngine;
2. using UnityEditor;
3. using System.Collections;
4. public class AnimationGizmos : MonoBehaviour {
5. // 曲线中的点数量
6. public int Interpolations = 32;
7. // 绘制路径曲线
8. void OnDrawGizmos() {
9. if(Interpolations > 0) {
10. Gizmos.color = Color.red;
11. // 获取所有的动画曲线
12. AnimationClip[] clips = AnimationUtility.GetAnimationClips(gameObject);
13. if (clips.Length == 0) {
14. return;
15. }
16. for (int curveIndex = 0; curveIndex < clips.Length; curveIndex++) {
17. Vector3[] points = new Vector3[Interpolations + 1];
18. AnimationCurve curveX = null;
19. AnimationCurve curveY = null;
20. AnimationCurve curveZ = null;
21. float TotalTime = 0;
22. bool curveReady = false;
23. AnimationClip clip = clips[curveIndex];
24. AnimationClipCurveData[] curveDatas = AnimationUtility.GetAllCurves(clip, true);
25. foreach (AnimationClipCurveData curveData in curveDatas) {
26. if ("m_LocalPosition.x" == curveData.propertyName) {
27. curveX = curveData.curve;
28. TotalTime = GetMaxTime(curveData.curve, TotalTime);
29. curveReady = true;
30. } else if ("m_LocalPosition.y" == curveData.propertyName) {
31. curveY = curveData.curve;
32. TotalTime = GetMaxTime(curveData.curve, TotalTime);
33. curveReady = true;
34. } else if ("m_LocalPosition.z" == curveData.propertyName) {
35. curveZ = curveData.curve;
36. TotalTime = GetMaxTime(curveData.curve, TotalTime);
37. curveReady = true;
38. }
39. }
40. if (!curveReady) {
41. Debug.LogWarning(clip.name + " 动画无位移");
42. continue;
43. }
44. float interval = TotalTime / Interpolations;
45. for (int i = 0; i <= Interpolations; i++) {
46. float time = i * interval;
47. Vector3 pos = transform.localPosition;
48. if (curveX != null) {
49. pos.x = curveX.Evaluate(time);
50. }
51. if (curveY != null) {
52. pos.y = curveY.Evaluate(time);
53. }
54. if (curveZ != null) {
55. pos.z = curveZ.Evaluate(time);
56. }
57. if (transform.parent != null) {
58. pos = transform.parent.TransformPoint(pos);
59. }
60. points[i] = pos;
61. }
62. for(int i = 0; i < Interpolations;i++) {
63. Gizmos.DrawLine(points[i], points[i+1]);
64. }
65. }
66. }
67. }
68. private static float GetMaxTime(AnimationCurve curveX, float TotalTime) {
69. foreach (Keyframe keyframe in curveX.keys) {
70. if (keyframe.time > TotalTime) {
71. TotalTime = keyframe.time;
72. }
73. }
74. return TotalTime;
75. }
76. }