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Shader "Custom/GreyScaleForBackPlay" {
Properties
{
[PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}
_Color ("Tint", Color) = (1,1,1,1)
[MaterialToggle] PixelSnap ("Pixel snap", Float) = 0
_EffectAmount ("Effect Amount", Range (0, 1)) = 1.0
}
SubShader
{
Tags
{
"Queue"="Transparent"
"IgnoreProjector"="True"
"RenderType"="Transparent"
"PreviewType"="Plane"
"CanUseSpriteAtlas"="True"
}
Cull Off
Lighting Off
ZWrite Off
Fog { Mode Off }
Blend SrcAlpha OneMinusSrcAlpha
Pass
{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma multi_compile DUMMY PIXELSNAP_ON
#include "UnityCG.cginc"
struct appdata_t
{
float4 vertex : POSITION;
float4 color : COLOR;
float2 texcoord : TEXCOORD0;
};
struct v2f
{
float4 vertex : SV_POSITION;
fixed4 color : COLOR;
half2 texcoord : TEXCOORD0;
};
fixed4 _Color;
v2f vert(appdata_t IN)
{
v2f OUT;
OUT.vertex = mul(UNITY_MATRIX_MVP, IN.vertex);
OUT.texcoord = IN.texcoord;
OUT.color = IN.color * _Color;
#ifdef PIXELSNAP_ON
OUT.vertex = UnityPixelSnap (OUT.vertex);
#endif
return OUT;
}
sampler2D _MainTex;
uniform float _EffectAmount;
fixed4 frag(v2f IN) : COLOR
{
half4 texcol = tex2D (_MainTex, IN.texcoord);
if ((texcol.r > 0.7)&&(texcol.g + texcol.b < 0.2))
{
return texcol;
}
half3 grey = lerp(texcol.rgb, dot(texcol.rgb, float3(0.3, 0.59, 0.11)), _EffectAmount);
texcol.rgb = grey;
texcol = texcol * IN.color;
return texcol;
}
ENDCG
}
}
Fallback "Sprites/Default"
}
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