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float4 tangent : TANGENT; |
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float3 normal : NORMAL; |
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float2 texcoord : TEXCOORD0; |
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float2 texcoord1 : TEXCOORD1; |
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UNITY_VERTEX_INPUT_INSTANCE_ID |
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float4 uvSplat01 : TEXCOORD0; // xy: splat0, zw: splat1 |
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float4 uvSplat23 : TEXCOORD1; // xy: splat2, zw: splat3 |
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float4 uvControlAndLM : TEXCOORD2; // xy: control, zw: lightmap |
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float4 uvMainAndLM : TEXCOORD0; // xy: control, zw: lightmap |
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#ifndef TERRAIN_SPLAT_BASEPASS |
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float4 uvSplat01 : TEXCOORD1; // xy: splat0, zw: splat1 |
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float4 uvSplat23 : TEXCOORD2; // xy: splat2, zw: splat3 |
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#endif |
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#if _TERRAIN_NORMAL_MAP |
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#ifdef _NORMALMAP |
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half3 tangent : TEXCOORD4; |
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half3 binormal : TEXCOORD5; |
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#endif |
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input.positionWS = IN.positionWS; |
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#ifdef _TERRAIN_NORMAL_MAP |
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#ifdef _NORMALMAP |
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input.normalWS = TangentToWorldNormal(normalTS, IN.tangent, IN.binormal, IN.normal); |
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#else |
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input.normalWS = normalize(IN.normal); |
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input.vertexLighting = IN.fogFactorAndVertexLight.yzw; |
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#ifdef LIGHTMAP_ON |
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input.bakedGI = SampleLightmap(IN.uvControlAndLM.zw, input.normalWS); |
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input.bakedGI = SampleLightmap(IN.uvMainAndLM.zw, input.normalWS); |
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#ifndef TERRAIN_SPLAT_BASEPASS |
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splat_control = SAMPLE_TEXTURE2D(_Control, sampler_Control, IN.uvControlAndLM.xy); |
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splat_control = SAMPLE_TEXTURE2D(_Control, sampler_Control, IN.uvMainAndLM.xy); |
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weight = dot(splat_control, 1); |
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#if !defined(SHADER_API_MOBILE) && defined(TERRAIN_SPLAT_ADDPASS) |
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mixedDiffuse += splat_control.b * SAMPLE_TEXTURE2D(_Splat2, sampler_Splat0, IN.uvSplat23.xy) * half4(1.0, 1.0, 1.0, defaultAlpha.b); |
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mixedDiffuse += splat_control.a * SAMPLE_TEXTURE2D(_Splat3, sampler_Splat0, IN.uvSplat23.zw) * half4(1.0, 1.0, 1.0, defaultAlpha.a); |
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#ifdef _TERRAIN_NORMAL_MAP |
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#ifdef _NORMALMAP |
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half4 nrm = 0.0f; |
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nrm += splat_control.r * SAMPLE_TEXTURE2D(_Normal0, sampler_Normal0, IN.uvSplat01.xy); |
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nrm += splat_control.g * SAMPLE_TEXTURE2D(_Normal1, sampler_Normal0, IN.uvSplat01.zw); |
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#endif |
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} |
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#endif |
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void SplatmapFinalColor(inout half4 color, half fogCoord) |
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{ |
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color.rgb *= color.a; |
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ApplyFog(color.rgb, fogCoord); |
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#endif |
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} |
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#ifdef UNITY_INSTANCING_ENABLED |
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TEXTURE2D(_TerrainHeightmapTexture); |
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TEXTURE2D(_TerrainNormalmapTexture); |
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float4 _TerrainHeightmapRecipSize; // float4(1.0f/width, 1.0f/height, 1.0f/(width-1), 1.0f/(height-1)) |
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float4 _TerrainHeightmapScale; // float4(hmScale.x, hmScale.y / (float)(kMaxHeight), hmScale.z, 0.0f) |
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#endif |
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#define API_HAS_GURANTEED_R16_SUPPORT 0 //!(SHADER_API_VULKAN) |
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float UnpackHeightmap(float4 height) |
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{ |
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#if (API_HAS_GURANTEED_R16_SUPPORT) |
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return height.r; |
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#else |
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return (height.r + height.g * 256.0f) / 257.0f; // (255.0f * height.r + 255.0f * 256.0f * height.g) / 65535.0f |
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#endif |
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} |
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UNITY_INSTANCING_BUFFER_START(Terrain) |
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UNITY_DEFINE_INSTANCED_PROP(float4, _TerrainPatchInstanceData) // float4(xBase, yBase, skipScale, ~) |
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UNITY_INSTANCING_BUFFER_END(Terrain) |
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void TerrainInstancing(inout float4 vertex, inout float3 normal, inout float2 uv) |
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{ |
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#ifdef UNITY_INSTANCING_ENABLED |
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float2 patchVertex = vertex.xy; |
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float4 instanceData = UNITY_ACCESS_INSTANCED_PROP(Terrain, _TerrainPatchInstanceData); |
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float2 sampleCoords = (patchVertex.xy + instanceData.xy) * instanceData.z; // (xy + float2(xBase,yBase)) * skipScale |
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float height = UnpackHeightmap(_TerrainHeightmapTexture.Load(int3(sampleCoords, 0))); |
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vertex.xz = sampleCoords * _TerrainHeightmapScale.xz; |
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vertex.y = height * _TerrainHeightmapScale.y; |
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normal = _TerrainNormalmapTexture.Load(int3(sampleCoords, 0)).rgb * 2 - 1; |
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uv = sampleCoords * _TerrainHeightmapRecipSize.zw; |
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#endif |
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} |
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void TerrainInstancing(inout float4 vertex, inout float3 normal) |
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{ |
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float2 uv = { 0, 0 }; |
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TerrainInstancing(vertex, normal, uv); |
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} |
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/////////////////////////////////////////////////////////////////////////////// |
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// Vertex and Fragment functions // |
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{ |
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VertexOutput o = (VertexOutput)0; |
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UNITY_SETUP_INSTANCE_ID(v); |
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TerrainInstancing(v.vertex, v.normal, v.texcoord); |
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o.uvMainAndLM.xy = v.texcoord; |
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o.uvMainAndLM.zw = v.texcoord * unity_LightmapST.xy + unity_LightmapST.zw; |
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#ifndef TERRAIN_SPLAT_BASEPASS |
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o.uvControlAndLM.xy = TRANSFORM_TEX(v.texcoord, _Control); |
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o.uvControlAndLM.zw = v.texcoord1 * unity_LightmapST.xy + unity_LightmapST.zw; |
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#ifdef _TERRAIN_NORMAL_MAP |
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#endif |
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#ifdef _NORMALMAP |
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float4 vertexTangent = float4(cross(v.normal, float3(0, 0, 1)), -1.0); |
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OutputTangentToWorld(vertexTangent, v.normal, o.tangent, o.binormal, o.normal); |
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#else |
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return o; |
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} |
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TEXTURE2D(_MetallicTex); SAMPLER(sampler_MetallicTex); |
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half4 SpatmapFragment(VertexOutput IN) : SV_TARGET |
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half4 SplatmapFragment(VertexOutput IN) : SV_TARGET |
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#ifdef TERRAIN_SPLAT_BASEPASS |
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half3 normalTS = float3(0, 1, 0); |
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half3 albedo = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, IN.uvMainAndLM.xy).rgb; |
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half smoothness = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, IN.uvMainAndLM.xy).a; |
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half metallic = SAMPLE_TEXTURE2D(_MetallicTex, sampler_MetallicTex, IN.uvMainAndLM.xy).r; |
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half alpha = 1; |
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#else |
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half4 splat_control; |
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half weight; |
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half4 mixedDiffuse; |
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half3 albedo = mixedDiffuse.rgb; |
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half smoothness = mixedDiffuse.a; |
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half metallic = dot(splat_control, half4(_Metallic0, _Metallic1, _Metallic2, _Metallic3)); |
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half3 specular = half3(0, 0, 0); |
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#endif |
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half4 color = LightweightFragmentPBR(inputData, albedo, metallic, specular, smoothness, /* occlusion */ 1.0, /* emission */ half3(0, 0, 0), alpha); |
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half4 color = LightweightFragmentPBR(inputData, albedo, metallic, half3(0, 0, 0), smoothness, /* occlusion */ 1.0, /* emission */ half3(0, 0, 0), alpha); |
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} |
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// Shadow pass |
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// x: global clip space bias, y: normal world space bias |
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float4 _ShadowBias; |
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float3 _LightDirection; |
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struct VertexInputLean |
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{ |
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float4 position : POSITION; |
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float3 normal : NORMAL; |
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UNITY_VERTEX_INPUT_INSTANCE_ID |
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}; |
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float4 ShadowPassVertex(VertexInputLean v) : SV_POSITION |
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{ |
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VertexOutput o; |
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UNITY_SETUP_INSTANCE_ID(v); |
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TerrainInstancing(v.position, v.normal); |
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float3 positionWS = TransformObjectToWorld(v.position.xyz); |
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float3 normalWS = TransformObjectToWorldDir(v.normal); |
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float invNdotL = 1.0 - saturate(dot(_LightDirection, normalWS)); |
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float scale = invNdotL * _ShadowBias.y; |
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// normal bias is negative since we want to apply an inset normal offset |
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positionWS = normalWS * scale.xxx + positionWS; |
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float4 clipPos = TransformWorldToHClip(positionWS); |
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// _ShadowBias.x sign depens on if platform has reversed z buffer |
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clipPos.z += _ShadowBias.x; |
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#if UNITY_REVERSED_Z |
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clipPos.z = min(clipPos.z, clipPos.w * UNITY_NEAR_CLIP_VALUE); |
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#else |
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clipPos.z = max(clipPos.z, clipPos.w * UNITY_NEAR_CLIP_VALUE); |
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#endif |
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return clipPos; |
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} |
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half4 ShadowPassFragment() : SV_TARGET |
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{ |
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return 0; |
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} |
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// Depth pass |
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float4 DepthOnlyVertex(VertexInputLean v) : SV_POSITION |
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{ |
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|
VertexOutput o = (VertexOutput)0; |
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UNITY_SETUP_INSTANCE_ID(v); |
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TerrainInstancing(v.position, v.normal); |
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|
return TransformObjectToHClip(v.position.xyz); |
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} |
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half4 DepthOnlyFragment() : SV_TARGET |
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{ |
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return 0; |
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} |
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#endif // LIGHTWEIGHT_PASS_LIT_TERRAIN_INCLUDED |
Yao Xiaoling
7 年前