Shader "Unlit/NewUnlitShader"
{
Properties
{
_MainTex ("Texture", 2D) = "white" {}
_MaskColor("MaskColor", Color) = (0,0,0,0)
_MaskStepPoint("_MaskStepPoint", range(0, 1)) = .9
}
SubShader
{
Tags { "RenderType"="Opaque" }
LOD 100
ZWrite Off
Blend SrcAlpha OneMinusSrcAlpha
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;
fixed4 _MaskColor;
half _MaskStepPoint;
v2f vert (appdata v)
{
v2f o;
o.vertex = mul(UNITY_MATRIX_MVP, 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 col = tex2D(_MainTex, i.uv);
fixed dist = distance(col.rgb, _MaskColor.rgb);
dist = step(_MaskStepPoint, dist);
col.a = dist;
// apply fog
UNITY_APPLY_FOG(i.fogCoord, col);
return col;
}
ENDCG
}
}
}
)
