153 lines
4.6 KiB
Plaintext
153 lines
4.6 KiB
Plaintext
Shader "Hidden/EnviroVolumetricCloudsDepth"
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{
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Properties
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{
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//_MainTex ("Texture", any) = "white" {}
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}
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SubShader
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{
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Tags { "RenderType"="Opaque" }
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LOD 100
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//Pass 1 downsample
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Pass
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{
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Cull Off ZWrite Off ZTest Always
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#pragma multi_compile __ ENVIROURP
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#include "UnityCG.cginc"
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UNITY_DECLARE_DEPTH_TEXTURE(_CameraDepthTexture);
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float4 _CameraDepthTexture_TexelSize;
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struct appdata
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{
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float4 vertex : POSITION;
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float2 uv : TEXCOORD0;
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UNITY_VERTEX_INPUT_INSTANCE_ID
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};
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struct v2f
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{
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float2 uv : TEXCOORD0;
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float2 uv00 : TEXCOORD1;
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float2 uv10 : TEXCOORD2;
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float2 uv01 : TEXCOORD3;
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float2 uv11 : TEXCOORD4;
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float4 vertex : SV_POSITION;
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UNITY_VERTEX_OUTPUT_STEREO
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};
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v2f vert(appdata v)
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{
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v2f o;
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UNITY_SETUP_INSTANCE_ID(v);
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UNITY_INITIALIZE_OUTPUT(v2f, o);
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
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#if defined(ENVIROURP)
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o.vertex = float4(v.vertex.xyz,1.0);
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#if UNITY_UV_STARTS_AT_TOP
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o.vertex.y *= -1;
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#endif
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#else
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o.vertex = UnityObjectToClipPos(v.vertex);
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#endif
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o.uv = v.uv;
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o.uv00 = v.uv - 0.5 * _CameraDepthTexture_TexelSize.xy;
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o.uv10 = o.uv00 + float2(_CameraDepthTexture_TexelSize.x, 0.0);
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o.uv01 = o.uv00 + float2(0.0, _CameraDepthTexture_TexelSize.y);
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o.uv11 = o.uv00 + _CameraDepthTexture_TexelSize.xy;
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return o;
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}
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float frag(v2f i) : SV_Target
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{
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UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(i);
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float4 depth;
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depth[0] = SAMPLE_DEPTH_TEXTURE(_CameraDepthTexture,UnityStereoTransformScreenSpaceTex(i.uv00));
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depth[1] = SAMPLE_DEPTH_TEXTURE(_CameraDepthTexture,UnityStereoTransformScreenSpaceTex(i.uv10));
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depth[2] = SAMPLE_DEPTH_TEXTURE(_CameraDepthTexture,UnityStereoTransformScreenSpaceTex(i.uv01));
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depth[3] = SAMPLE_DEPTH_TEXTURE(_CameraDepthTexture,UnityStereoTransformScreenSpaceTex(i.uv11));
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return min(depth[0], min(depth[1], min(depth[2], depth[3])));
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//float minDepth = min(min(depth[0], depth[1]), min(depth[2], depth[3]));
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//float maxDepth = max(max(depth[0], depth[1]), max(depth[2], depth[3]));
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// chessboard pattern
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//int2 position = i.vertex.xy % 2;
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//int index = position.x + position.y;
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//return index == 1 ? minDepth : maxDepth;
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//return minDepth;
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}
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ENDCG
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}
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//Pass 2 Copy
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Pass
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{
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Cull Off ZWrite Off ZTest Always
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#pragma multi_compile __ ENVIROURP
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#include "UnityCG.cginc"
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UNITY_DECLARE_DEPTH_TEXTURE(_CameraDepthTexture);
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struct appdata
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{
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float4 vertex : POSITION;
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float2 uv : TEXCOORD0;
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UNITY_VERTEX_INPUT_INSTANCE_ID
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};
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struct v2f
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{
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float2 uv : TEXCOORD0;
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float4 vertex : SV_POSITION;
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UNITY_VERTEX_OUTPUT_STEREO
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};
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v2f vert(appdata v)
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{
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v2f o;
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UNITY_SETUP_INSTANCE_ID(v);
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UNITY_INITIALIZE_OUTPUT(v2f, o);
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
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#if defined(ENVIROURP)
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o.vertex = float4(v.vertex.xyz,1.0);
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#if UNITY_UV_STARTS_AT_TOP
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o.vertex.y *= -1;
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#endif
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#else
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o.vertex = UnityObjectToClipPos(v.vertex);
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#endif
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o.uv = v.uv;
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return o;
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}
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float frag(v2f i) : SV_Target
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{
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UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(i);
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return SAMPLE_DEPTH_TEXTURE(_CameraDepthTexture,UnityStereoTransformScreenSpaceTex(i.uv));
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}
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ENDCG
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}
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}
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}
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