UnityShaderBook/Assets/Shaders/Extra/Bump/TextureNormalShader.shader

Shader "Unlit/TextureNormalShader"
{
	Properties
	{
		_DepthScale("DepthData",Float) = 0.1
	}
	SubShader
	{
		Tags { "RenderType"="Opaque" }
		LOD 100

		Pass
		{
			CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			// make fog work
			#pragma multi_compile_fog
			
			#include "UnityCG.cginc"

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

			struct v2f
			{
				float2 uv : TEXCOORD0;
				float4 vertex : SV_POSITION;
				float4 scrPos : TEXCOORD1;
			};

			sampler2D _CameraDepthNormalTexture;
			float _DepthScale;
			
			v2f vert (appdata v)
			{
				v2f o;
				o.vertex = UnityObjectToClipPos(v.vertex);
				o.uv = v.uv;
				o.scrPos = ComputeGrabScreenPos(o.vertex);
				return o;
			}
			
			fixed4 frag (v2f i) : SV_Target
			{
				// sample the texture
				fixed4 refrCol = tex2D(_CameraDepthNormalTexture, i.scrPos.xy/i.scrPos.w);
				
				return refrCol*_DepthScale;
			}
			ENDCG
		}
	}
}