Unity 过度光照贴图

背景：开关窗帘过程，让环境在亮和暗之间过度

 

事先烘培出亮、暗两张Lighting map。然后代码实现，窗帘开关由动作实现，而代码中通过动作执行进度来过度两张Lighting map

void OnAnimatorMove()

{

    AnimatorTransitionInfo transitionInfo = animator.GetAnimatorTransitionInfo(0);

    if (transitionInfo.normalizedTime != 0)//状态切换中

    {

    }

    else

    {

        AnimatorStateInfo currentAnimatorStateInfo = animator.GetCurrentAnimatorStateInfo(0);



        // 开窗

        if (currentAnimatorStateInfo.IsName("opening"))

        {

            LightmapBlender.Instance.OpenWindow(currentAnimatorStateInfo.normalizedTime);

        }



        // 关窗

        if (currentAnimatorStateInfo.IsName("closing"))

        {

            LightmapBlender.Instance.CloseWindow(currentAnimatorStateInfo.normalizedTime);

        }

    }

动作控制代码

 1 public Texture2D normalTexture2D;

 2 public Texture2D closeWindowTexture2D;

 3 public Texture2D dancingTexture2D;

 4 

 5 public Texture2D blendTexture2D;

 6 

 7 private Color[] normalColors;

 8 private Color[] closeWindowColors;

 9 private Color[] dancingColors;

10 

11 private Color[] blendColors;

12 

13 [SerializeField]

14 private Transform brightTransform, darkTransform;

15 

16 [SerializeField]

17 private Color brightAmbientLight, darkAmbientLight;

18 

19 void Awake ()

20 {

21     normalColors = normalTexture2D.GetPixels();

22     closeWindowColors = closeWindowTexture2D.GetPixels();

23 

24     if (dancingTexture2D != null)

25         dancingColors = dancingTexture2D.GetPixels();

26 

27     blendColors = blendTexture2D.GetPixels();

28 }

29 

30 public void OpenWindow(float t)

31 {

32     brightTransform.gameObject.SetActive(true);

33     darkTransform.gameObject.SetActive(false);

34 

35     Blend2Textures(closeWindowColors, normalColors, t);

36     RenderSettings.ambientLight = Blend2Color(darkAmbientLight, brightAmbientLight, t);

37 }

38 

39 public void CloseWindow(float t)

40 {

41     brightTransform.gameObject.SetActive(false);

42     darkTransform.gameObject.SetActive(true);

43 

44     Blend2Textures(normalColors, closeWindowColors, t);

45 

46     // 过度环境光（影响没烘培在Lighting map 中的对象的明暗）

47     RenderSettings.ambientLight = Blend2Color(brightAmbientLight, darkAmbientLight, t);

48 }

49 

50 private Color Blend2Color(Color from, Color to, float t)

51 {

52     Color blend;

53 

54     blend.r = from.r * (1 - t) + to.r * t;

55     blend.g = from.g * (1 - t) + to.g * t;

56     blend.b = from.b * (1 - t) + to.b * t;

57     blend.a = from.a * (1 - t) + to.a * t;

58 

59     return blend;

60 }

61 

62 private void Blend2Textures(Color[] from, Color[] to, float t)

63 {

64     for (int i = 0; i < blendColors.Length; i++)

65         blendColors[i] = Blend2Color(from[i], to[i], t);

66     

67     blendTexture2D.SetPixels(blendColors);

68     blendTexture2D.Apply();

69 

70     SwitchLightmaps(blendTexture2D);

71 }

72 

73 private void SwitchLightmaps(Texture2D tex)

74 {

75     LightmapData[] lightmaps = LightmapSettings.lightmaps;

76     

77     lightmaps[0].lightmapFar = tex;

78 

79     // 切换 Lighting map

80     LightmapSettings.lightmaps = lightmaps;

81 }

插值过度Lighting map