Shader "SkyBox/CustomSky"
{
    Properties
    {
       
    }
    SubShader
    {
        Tags {"Queue"="Background" "RenderType"="Background" "PreviewType" = "Skybox"}
        Cull Off ZWrite Off

        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
           

            #include "UnityCG.cginc"
            #include "SkyCore.cginc"

            struct appdata
            {
                float4 vertex : POSITION;
              
            };

            struct v2f
            {
                float3 worldPos : TEXCOORD0;               
                float4 vertex : SV_POSITION;
              
            };

          

            v2f vert (appdata v)
            {
                v2f o;
                o.worldPos = mul(unity_ObjectToWorld, float4(v.vertex.xyz, 1)).xyz;             
                o.vertex = UnityObjectToClipPos(v.vertex);
               
              
                return o;
            }

            half4 frag(v2f i) : SV_Target
            {
                fixed3 viewDir = normalize(i.worldPos);
                half3 col = GetSkyBoxAndSunCol(viewDir);
              
                return half4(col,1);
            }
            ENDCG
        }
    }
}