Shader "Unlit/Swish"
{
    Properties
    {
        _MainTex ("Texture", 2D) = "white" {}
        [HDR]_Color ("Color", Color) = (1,1,1,1)
    }
    SubShader
    {

        Tags {"Queue" = "Transparent"  "RenderType"="Transparent" }
        ZWrite Off
          Cull Off
          Blend SrcAlpha One


        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            // make fog work
            #pragma multi_compile_fog

            #include "UnityCG.cginc"

            struct appdata
            {
                float4 vertex : POSITION;
                float3 normal : NORMAL;
                float2 uv : TEXCOORD0;
            };

            struct v2f
            {
                float2 uv : TEXCOORD0;
                float4 uv2 : TEXCOORD2;
                UNITY_FOG_COORDS(1)
                float4 vertex : SV_POSITION;
            };

            sampler2D _MainTex;
            float4 _MainTex_ST;
            float4 _Color;

            v2f vert (appdata v)
            {
                v2f o;

                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
                o.uv2 = float4(v.uv, 0 ,0);
                float4 vertData = tex2Dlod(_MainTex, float4(o.uv, 0, 0)).rrrr;
                v.vertex.xyz -= v.normal * 0.02;
                v.vertex.xyz += vertData * v.normal * 0.1;
                o.vertex = UnityObjectToClipPos(float4(v.vertex.xyz, 1));
                UNITY_TRANSFER_FOG(o,o.vertex);
                return o;
            }

            fixed4 frag (v2f i) : SV_Target
            {
                // sample the texture
                fixed4 tex = tex2D(_MainTex, i.uv2);
                fixed4 col = tex2D(_MainTex, i.uv).r * _Color * tex.g * tex.b;
                // apply fog
                UNITY_APPLY_FOG(i.fogCoord, col);
                return col;
            }
            ENDCG
        }
    }
}