Unity中mask组件下的灰度shader

项目上遇到了一个问题，灰度shader无法在mask下使用，两个之间会一定的冲突。经查验是mask组件对shader的相关属性有要求，添加相关的属性则可符合要求使其他shader使用UGui里的mask。

1. Shader "Custom/Opaque"
2. {
3. Properties
4. {
5. [PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}
6. _Color ("Tint", Color) = (1,1,1,1)
8. // required for UI.Mask
9. _StencilComp ("Stencil Comparison", Float) = 8
10. _Stencil ("Stencil ID", Float) = 0
11. _StencilOp ("Stencil Operation", Float) = 0
12. _StencilWriteMask ("Stencil Write Mask", Float) = 255
13. _StencilReadMask ("Stencil Read Mask", Float) = 255
14. _ColorMask ("Color Mask", Float) = 15
15. }
16. SubShader
17. {
18. Tags
19. {
20. // ...
21. }
23. // required for UI.Mask
24. Stencil
25. {
26. Ref [_Stencil]
27. Comp [_StencilComp]
28. Pass [_StencilOp]
29. ReadMask [_StencilReadMask]
30. WriteMask [_StencilWriteMask]
31. }
32. ColorMask [_ColorMask]
34. Pass
35. {
36. // ...
37. }
38. }
39. }

 

 

 

 

 

完整代码如下：

Shader "Unlit/graytest"
{
Properties
{
_MainTex ("Texture", 2D) = "white" {}
_StencilComp("Stencil Comparison", Float) = 8
_Stencil("Stencil ID", Float) = 0
_StencilOp("Stencil Operation", Float) = 0
_StencilWriteMask("Stencil Write Mask", Float) = 255
_StencilReadMask("Stencil Read Mask", Float) = 255
_ColorMask("Color Mask", Float) = 15
_LayerDepth("LayerDepth", Float) = 15
}

SubShader
{
Tags { "RenderType"="Opaque""Queue"="Geometry" }
LOD 100
Stencil
{
Ref[_Stencil]
Comp[_StencilComp]
Pass[_StencilOp]
ReadMask[_StencilReadMask]
WriteMask[_StencilWriteMask]
}
ColorMask[_ColorMask]
Pass
{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
// make fog work
#pragma multi_compile_fog

#include "UnityCG.cginc"

struct appdata
{
float4 vertex : POSITION;
float2 uv : TEXCOORD0;
};

struct v2f
{
float2 uv : TEXCOORD0;
UNITY_FOG_COORDS(1)
float4 vertex : SV_POSITION;
};

sampler2D _MainTex;
float4 _MainTex_ST;

v2f vert (appdata v)
{
v2f o;
o.vertex = UnityObjectToClipPos(v.vertex);
o.uv = TRANSFORM_TEX(v.uv, _MainTex);
UNITY_TRANSFER_FOG(o,o.vertex);
return o;
}

fixed4 frag (v2f i) : SV_Target
{
// sample the texture
fixed4 c = tex2D(_MainTex, i.uv);
fixed4 col = c.r*0.3 + c.g*0.59 + c.b*0.11;
// apply fog
UNITY_APPLY_FOG(i.fogCoord, col);
return col;
}
ENDCG
}
}
}