ANTM/Assets/Systems/CustomizeSystem/Shaders/FaceShader.shader

Shader "Custom/FaceShader"
{
	Properties
	{
		_MainTex("Main", 2D) = "white" {}
		_Eyes("Eyes", 2D) = "white" {}
		_EyesTint("EyesTint", Color) = (1.0, 1.0, 1.0, 1.0)
		_Eyelines("Eyelines", 2D) = "white" {}
		_EyelinesTint("EyelinesTint", Color) = (1.0, 1.0, 1.0, 1.0)
		_EyeShadows("EyeShadows", 2D) = "white" {}
		_EyeShadowsTint("EyeShadowsTint", Color) = (1.0, 1.0, 1.0, 1.0)
		_Lips("Lips", 2D) = "white" {}
		_LipsTint("LipsTint", Color) = (1.0, 1.0, 1.0, 1.0)
	}
	
	SubShader
	{
		Tags{ "RenderType" = "Opaque" }
		LOD 100

		Pass
		{
			CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			#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;

			sampler2D _Eyes;
			float4 _Eyes_ST;
			float4 _EyesTint;

			sampler2D _Eyelines;
			float4 _Eyelines_ST;
			float4 _EyelinesTint;

			sampler2D _EyeShadows;
			float4 _EyeShadows_ST;
			float4 _EyeShadowsTint;

			sampler2D _Lips;
			float4 _Lips_ST;
			float4 _LipsTint;

			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 getColor(half4 overlay)
			{
				return (1 - overlay.a) + (overlay.rgba * overlay.a);
			}

			fixed4 frag(v2f i) : SV_Target
			{
				half4 eyesColor = tex2D(_Eyes, i.uv) * _EyesTint;
				half4 eyelinesColor = tex2D(_Eyelines, i.uv) * _EyelinesTint;
				half4 eyeShadowsColor = tex2D(_EyeShadows, i.uv) * _EyeShadowsTint;
				half4 lipsColor = tex2D(_Lips, i.uv) * _LipsTint;

				fixed4 col = tex2D(_MainTex, i.uv);
				UNITY_APPLY_FOG(i.fogCoord, col);

				fixed4 result = col.rgba * (getColor(eyesColor) * getColor(eyeShadowsColor) * getColor(eyelinesColor) * getColor(lipsColor));
				result.a = 1;
				return  result;
			}

			ENDCG
		}
	}
}