Shader "Hidden/Funly/Sky Studio/Weather/OverheadDepthNormal"
{
	Properties
	{
	}
	SubShader
	{
		Tags { "RenderType"="Opaque" }
		LOD 100

		Pass
		{
			CGPROGRAM
			#pragma target 2.0
			#pragma vertex vert
			#pragma fragment frag

			#include "UnityCG.cginc"

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

			struct v2f
			{
				float4 vertex : SV_POSITION;
				float fragDepth : TEXCOORD1;
				float3 worldNormal : TEXCOORD2;
			};
      
			v2f vert (appdata v)
			{
				v2f o;
				o.vertex = UnityObjectToClipPos(v.vertex);
				o.worldNormal = UnityObjectToWorldNormal(v.normal);
				o.fragDepth = o.vertex.z / o.vertex.w;
        
				return o;
			}
			
      inline float GetNormalPercent(float value) {
        return (value + 1.0f) / 2.0f;
      }

      float3 GetPercentVector(float3 dir) {
        return float3(GetNormalPercent(dir.x), GetNormalPercent(dir.y), GetNormalPercent(dir.z));
      }

			fixed4 frag (v2f i) : SV_Target
			{
        float depth = i.fragDepth;

        if (UNITY_NEAR_CLIP_VALUE < 0.0f) {
          // OpenGL-like platforms are [-1,1] ranged and DirectX-like are [0,1] ranged.
					// Convert the -1:1 ranged value to 0:1.
          depth = (depth + 1.0f) / 2.0f;
        }

        #if defined(UNITY_REVERSED_Z)
          depth = 1.0f - depth;
        #endif

				// You can't store negative numbers so convert to a 0:1 values for normal direction.
        float3 percentNormal = GetPercentVector(normalize(i.worldNormal));

				return fixed4(percentNormal, saturate(depth));
			}
			ENDCG
		}
	}
	FallBack "Unlit/Color"
}