1 // Unity built-in shader source. Copyright (c) 2016 Unity Technologies. MIT license (see license.txt)

 2

 3 Shader "Custom/2DShadow"

 4 {

 5     Properties

 6     {

 7         [PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}

 8         _Color ("Tint", Color) = (1,1,1,1)

 9         [MaterialToggle] PixelSnap ("Pixel snap", Float) = 0

10         [HideInInspector] _RendererColor ("RendererColor", Color) = (1,1,1,1)

11         [HideInInspector] _Flip ("Flip", Vector) = (1,1,1,1)

12         [PerRendererData] _AlphaTex ("External Alpha", 2D) = "white" {}

13         [PerRendererData] _EnableExternalAlpha ("Enable External Alpha", Float) = 0

14     }

15

16     SubShader

17     {

18         Tags

19         {

20             "Queue"="Transparent"

21             "IgnoreProjector"="True"

22             "RenderType"="Transparent"

23             "PreviewType"="Plane"

24             "CanUseSpriteAtlas"="True"

25         }

26

27         Cull Off

28         Lighting Off

29         ZWrite Off

30         Blend One OneMinusSrcAlpha

31

32         Pass

33         {

34         CGPROGRAM

35             #pragma vertex SpriteVert

36             #pragma fragment SpriteFrag

37             #pragma target 2.0

38             #pragma multi_compile_instancing

39             #pragma multi_compile_local _ PIXELSNAP_ON

40             #pragma multi_compile _ ETC1_EXTERNAL_ALPHA

41             #include "UnitySprites.cginc"

42         ENDCG

43         }

44     }

45

46     FallBack "VertexLit"  //上面都是默认代码,只加了这一句,原因可以看看<UnityShader入门精要>,有讲Unity阴影原理

47 }

1 void Awake()

2     {

3         transform.GetComponent<SpriteRenderer>().receiveShadows = true;

4         transform.GetComponent<SpriteRenderer>().shadowCastingMode = ShadowCastingMode.TwoSided;

5     }