62 lines
2.2 KiB
HLSL
62 lines
2.2 KiB
HLSL
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#ifndef UNIVERSAL_WAVING_GRASS_DEPTH_NORMAL_PASSE_INCLUDED
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#define UNIVERSAL_WAVING_GRASS_DEPTH_NORMAL_PASSE_INCLUDED
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struct GrassVertexDepthNormalInput
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{
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float4 vertex : POSITION;
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float3 normal : NORMAL;
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float4 tangent : TANGENT;
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half4 color : COLOR;
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float2 texcoord : TEXCOORD0;
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UNITY_VERTEX_INPUT_INSTANCE_ID
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};
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struct GrassVertexDepthNormalOutput
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{
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float2 uv : TEXCOORD0;
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half3 normal : TEXCOORD1;
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half4 color : TEXCOORD2;
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float3 viewDirWS : TEXCOORD3;
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float4 clipPos : SV_POSITION;
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UNITY_VERTEX_INPUT_INSTANCE_ID
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UNITY_VERTEX_OUTPUT_STEREO
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};
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GrassVertexDepthNormalOutput DepthNormalOnlyVertex(GrassVertexDepthNormalInput v)
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{
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GrassVertexDepthNormalOutput o = (GrassVertexDepthNormalOutput)0;
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UNITY_SETUP_INSTANCE_ID(v);
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UNITY_TRANSFER_INSTANCE_ID(v, o);
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
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// MeshGrass v.color.a: 1 on top vertices, 0 on bottom vertices
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// _WaveAndDistance.z == 0 for MeshLit
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float waveAmount = v.color.a * _WaveAndDistance.z;
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o.color = TerrainWaveGrass(v.vertex, waveAmount, v.color);
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VertexPositionInputs vertexInput = GetVertexPositionInputs(v.vertex.xyz);
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o.uv = v.texcoord;
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o.normal = TransformObjectToWorldNormal(v.normal);
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o.clipPos = vertexInput.positionCS;
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o.viewDirWS = GetCameraPositionWS() - vertexInput.positionWS;
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return o;
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}
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half4 DepthNormalOnlyFragment(GrassVertexDepthNormalOutput input) : SV_TARGET
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{
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Alpha(SampleAlbedoAlpha(input.uv, TEXTURE2D_ARGS(_MainTex, sampler_MainTex)).a, input.color, _Cutoff);
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#if defined(_GBUFFER_NORMALS_OCT)
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float3 normalWS = normalize(input.normal);
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float2 octNormalWS = PackNormalOctQuadEncode(normalWS); // values between [-1, +1], must use fp32 on Nintendo Switch.
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float2 remappedOctNormalWS = saturate(octNormalWS * 0.5 + 0.5); // values between [ 0, 1]
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half3 packedNormalWS = PackFloat2To888(remappedOctNormalWS); // values between [ 0, 1]
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return half4(packedNormalWS, 0.0);
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#else
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half3 normalWS = half3(normalize(cross(ddy(input.viewDirWS), ddx(input.viewDirWS))));
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return half4(normalWS, 0.0);
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#endif
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}
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#endif
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