Shader "Unlit/DoubleVision"

{

	Properties

	{

		_MainTex ("Texture", 2D) = "white" {}

		_LeftOffset("Left Offset", Range(-1, 0)) = -0.1

		_RightOffset("Right Offset", Range(0, 1)) = 0.1

	}

	SubShader

	{

		Tags { "RenderType"="Opaque" }

		LOD 100

		Pass

		{

			CGPROGRAM

			#pragma vertex vert

			#pragma fragment frag

			#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;

			float _LeftOffset;

			float _RightOffset;

			v2f vert (appdata v)

			{

				v2f o;

				o.vertex = mul(UNITY_MATRIX_MVP, v.vertex);

				o.uv = TRANSFORM_TEX(v.uv, _MainTex);

				return o;

			}

			fixed4 frag (v2f i) : SV_Target

			{

				// sample the texture

				float2 leftTexCoord = i.uv + float2(_LeftOffset, 0);

				float2 rightTexCoord = i.uv + float2(_RightOffset, 0);

				fixed4 col_l = tex2D(_MainTex, leftTexCoord);

				fixed4 col_r = tex2D(_MainTex, rightTexCoord);

				fixed4 col = lerp(col_l, col_r, 0.5);

				return col;

			}

			ENDCG

		}

	}

}