SurfaceDescriptionInputs BuildSurfaceDescriptionInputs(Varyings input) { SurfaceDescriptionInputs output; ZERO_INITIALIZE(SurfaceDescriptionInputs, output); $splice(CustomInterpolatorCopyToSDI) $SurfaceDescriptionInputs.WorldSpaceNormal: // must use interpolated tangent, bitangent and normal before they are normalized in the pixel shader. $SurfaceDescriptionInputs.WorldSpaceNormal: float3 unnormalizedNormalWS = input.normalWS; $SurfaceDescriptionInputs.WorldSpaceNormal: const float renormFactor = 1.0 / length(unnormalizedNormalWS); $SurfaceDescriptionInputs.WorldSpaceBiTangent: // use bitangent on the fly like in hdrp $SurfaceDescriptionInputs.WorldSpaceBiTangent: // IMPORTANT! If we ever support Flip on double sided materials ensure bitangent and tangent are NOT flipped. $SurfaceDescriptionInputs.WorldSpaceBiTangent: float crossSign = (input.tangentWS.w > 0.0 ? 1.0 : -1.0) * GetOddNegativeScale(); $SurfaceDescriptionInputs.WorldSpaceBiTangent: float3 bitang = crossSign * cross(input.normalWS.xyz, input.tangentWS.xyz); $SurfaceDescriptionInputs.WorldSpaceNormal: output.WorldSpaceNormal = renormFactor*input.normalWS.xyz; // we want a unit length Normal Vector node in shader graph $SurfaceDescriptionInputs.ObjectSpaceNormal: output.ObjectSpaceNormal = normalize(mul(output.WorldSpaceNormal, (float3x3) UNITY_MATRIX_M)); // transposed multiplication by inverse matrix to handle normal scale $SurfaceDescriptionInputs.ViewSpaceNormal: output.ViewSpaceNormal = mul(output.WorldSpaceNormal, (float3x3) UNITY_MATRIX_I_V); // transposed multiplication by inverse matrix to handle normal scale $SurfaceDescriptionInputs.TangentSpaceNormal: output.TangentSpaceNormal = float3(0.0f, 0.0f, 1.0f); $SurfaceDescriptionInputs.WorldSpaceTangent: // to preserve mikktspace compliance we use same scale renormFactor as was used on the normal. $SurfaceDescriptionInputs.WorldSpaceTangent: // This is explained in section 2.2 in "surface gradient based bump mapping framework" $SurfaceDescriptionInputs.WorldSpaceTangent: output.WorldSpaceTangent = renormFactor*input.tangentWS.xyz; $SurfaceDescriptionInputs.WorldSpaceBiTangent: output.WorldSpaceBiTangent = renormFactor*bitang; $SurfaceDescriptionInputs.ObjectSpaceTangent: output.ObjectSpaceTangent = TransformWorldToObjectDir(output.WorldSpaceTangent); $SurfaceDescriptionInputs.ViewSpaceTangent: output.ViewSpaceTangent = TransformWorldToViewDir(output.WorldSpaceTangent); $SurfaceDescriptionInputs.TangentSpaceTangent: output.TangentSpaceTangent = float3(1.0f, 0.0f, 0.0f); $SurfaceDescriptionInputs.ObjectSpaceBiTangent: output.ObjectSpaceBiTangent = TransformWorldToObjectDir(output.WorldSpaceBiTangent); $SurfaceDescriptionInputs.ViewSpaceBiTangent: output.ViewSpaceBiTangent = TransformWorldToViewDir(output.WorldSpaceBiTangent); $SurfaceDescriptionInputs.TangentSpaceBiTangent: output.TangentSpaceBiTangent = float3(0.0f, 1.0f, 0.0f); $SurfaceDescriptionInputs.WorldSpaceViewDirection: output.WorldSpaceViewDirection = GetWorldSpaceNormalizeViewDir(input.positionWS); $SurfaceDescriptionInputs.ObjectSpaceViewDirection: output.ObjectSpaceViewDirection = TransformWorldToObjectDir(output.WorldSpaceViewDirection); $SurfaceDescriptionInputs.ViewSpaceViewDirection: output.ViewSpaceViewDirection = TransformWorldToViewDir(output.WorldSpaceViewDirection); $SurfaceDescriptionInputs.TangentSpaceViewDirection: float3x3 tangentSpaceTransform = float3x3(output.WorldSpaceTangent,output.WorldSpaceBiTangent,output.WorldSpaceNormal); $SurfaceDescriptionInputs.TangentSpaceViewDirection: output.TangentSpaceViewDirection = TransformWorldToTangent(output.WorldSpaceViewDirection, tangentSpaceTransform); $SurfaceDescriptionInputs.WorldSpacePosition: output.WorldSpacePosition = input.positionWS; $SurfaceDescriptionInputs.ObjectSpacePosition: output.ObjectSpacePosition = TransformWorldToObject(input.positionWS); $SurfaceDescriptionInputs.ViewSpacePosition: output.ViewSpacePosition = TransformWorldToView(input.positionWS); $SurfaceDescriptionInputs.TangentSpacePosition: output.TangentSpacePosition = float3(0.0f, 0.0f, 0.0f); $SurfaceDescriptionInputs.AbsoluteWorldSpacePosition: output.AbsoluteWorldSpacePosition = GetAbsolutePositionWS(input.positionWS); $SurfaceDescriptionInputs.WorldSpacePositionPredisplacement: output.WorldSpacePositionPredisplacement = input.positionPredisplacementWS; $SurfaceDescriptionInputs.ObjectSpacePositionPredisplacement: output.ObjectSpacePositionPredisplacement = TransformWorldToObject(input.positionPredisplacementWS); $SurfaceDescriptionInputs.ViewSpacePositionPredisplacement: output.ViewSpacePositionPredisplacement = TransformWorldToView(input.positionPredisplacementWS); $SurfaceDescriptionInputs.TangentSpacePositionPredisplacement: output.TangentSpacePositionPredisplacement = float3(0.0f, 0.0f, 0.0f); $SurfaceDescriptionInputs.AbsoluteWorldSpacePositionPredisplacement:output.AbsoluteWorldSpacePositionPredisplacement = GetAbsolutePositionWS(input.positionPredisplacementWS); $SurfaceDescriptionInputs.ScreenPosition: output.ScreenPosition = ComputeScreenPos(TransformWorldToHClip(input.positionWS), _ProjectionParams.x); #if UNITY_UV_STARTS_AT_TOP $SurfaceDescriptionInputs.PixelPosition: output.PixelPosition = float2(input.positionCS.x, (_ProjectionParams.x < 0) ? (_ScreenParams.y - input.positionCS.y) : input.positionCS.y); #else $SurfaceDescriptionInputs.PixelPosition: output.PixelPosition = float2(input.positionCS.x, (_ProjectionParams.x > 0) ? (_ScreenParams.y - input.positionCS.y) : input.positionCS.y); #endif $SurfaceDescriptionInputs.NDCPosition: output.NDCPosition = output.PixelPosition.xy / _ScreenParams.xy; $SurfaceDescriptionInputs.NDCPosition: output.NDCPosition.y = 1.0f - output.NDCPosition.y; $SurfaceDescriptionInputs.uv0: output.uv0 = input.texCoord0; $SurfaceDescriptionInputs.uv1: output.uv1 = input.texCoord1; $SurfaceDescriptionInputs.uv2: output.uv2 = input.texCoord2; $SurfaceDescriptionInputs.uv3: output.uv3 = input.texCoord3; $SurfaceDescriptionInputs.VertexColor: output.VertexColor = input.color; $SurfaceDescriptionInputs.VertexID: output.VertexID = input.vertexID; $SurfaceDescriptionInputs.TimeParameters: output.TimeParameters = _TimeParameters.xyz; // This is mainly for LW as HD overwrite this value #if defined(SHADER_STAGE_FRAGMENT) && defined(VARYINGS_NEED_CULLFACE) #define BUILD_SURFACE_DESCRIPTION_INPUTS_OUTPUT_FACESIGN output.FaceSign = IS_FRONT_VFACE(input.cullFace, true, false); #else #define BUILD_SURFACE_DESCRIPTION_INPUTS_OUTPUT_FACESIGN #endif $SurfaceDescriptionInputs.FaceSign: BUILD_SURFACE_DESCRIPTION_INPUTS_OUTPUT_FACESIGN #undef BUILD_SURFACE_DESCRIPTION_INPUTS_OUTPUT_FACESIGN return output; }