Added TangentToWorld and Eye master

MaterialGraphProject/Assets/Matt/AbstractAdvancedMasterNode.cs

         public const int OcclusionSlotId = 5;
         public const int AlphaSlotId = 6;
 
-        public const string AnisotropySlotName = "Anisotropy";
-        public const int AnisotropySlotId = 7;
-        public const int TangentSlotId = 8;
+        public const int TangentSlotId = 7;
 
         [SerializeField]
         private SurfaceMaterialOptions m_MaterialOptions = new SurfaceMaterialOptions();
 
         public abstract string GetSurfaceOutputName();
         public abstract string GetLightFunction();
+
+        //Deal with custom data packing
+
+        // Check for whether tangents are needed in the BRDF
+        public virtual bool RequireTangentCalculation()
+        {
+            return false;
+        }
 
         public override string GetSubShader(GenerationMode mode, PropertyGenerator shaderPropertiesVisitor)
         {
                             shaderBody.AddShaderChunk("o." + slot.shaderOutputName + " += 1e-6;", true);
                     }
 
+                    // If tangents are needed for the BRDF
-                        var edges = owner.GetEdges(slot.slotReference);
-                        if (edges.Any())
-                        {
-                            shaderBody.AddShaderChunk("float3x3 worldToTangent;", false);
-                            shaderBody.AddShaderChunk("worldToTangent[0] = float3(1, 0, 0);", false);
-                            shaderBody.AddShaderChunk("worldToTangent[1] = float3(0, 1, 0);", false);
-                            shaderBody.AddShaderChunk("worldToTangent[2] = float3(0, 0, 1);", false);
-                            shaderBody.AddShaderChunk("float3 tangentTWS = mul(o." + slot.shaderOutputName + ", worldToTangent);", false);
-                            shaderBody.AddShaderChunk("o.WorldVectors = float3x3(tangentTWS, " + ShaderGeneratorNames.WorldSpaceBitangent + ", " + ShaderGeneratorNames.WorldSpaceNormal + ");", false);
-                        }
-                        else
+                        if (RequireTangentCalculation())
-                            shaderBody.AddShaderChunk("o.WorldVectors = float3x3(" + ShaderGeneratorNames.WorldSpaceTangent + ", " + ShaderGeneratorNames.WorldSpaceBitangent + ", " + ShaderGeneratorNames.WorldSpaceNormal + ");", false);
+                            var edges = owner.GetEdges(slot.slotReference);
+                            if (edges.Any())
+                            {
+                                shaderBody.AddShaderChunk("float3x3 worldToTangent;", false);
+                                shaderBody.AddShaderChunk("worldToTangent[0] = float3(1, 0, 0);", false);
+                                shaderBody.AddShaderChunk("worldToTangent[1] = float3(0, 1, 0);", false);
+                                shaderBody.AddShaderChunk("worldToTangent[2] = float3(0, 0, 1);", false);
+                                shaderBody.AddShaderChunk("float3 tangentTWS = mul(o." + slot.shaderOutputName + ", worldToTangent);", false);
+                                shaderBody.AddShaderChunk("o.WorldVectors = float3x3(tangentTWS, " + ShaderGeneratorNames.WorldSpaceBitangent + ", " + ShaderGeneratorNames.WorldSpaceNormal + ");", false);
+                            }
+                            else
+                            {
+                                shaderBody.AddShaderChunk("o.WorldVectors = float3x3(" + ShaderGeneratorNames.WorldSpaceTangent + ", " + ShaderGeneratorNames.WorldSpaceBitangent + ", " + ShaderGeneratorNames.WorldSpaceNormal + ");", false);
+                            }
                         }
                     }
                 }

MaterialGraphProject/Assets/Matt/AnisotropicMetallicMasterNode.cs

         public const string MetallicSlotName = "Metallic";
         public const int MetallicSlotId = 2;
 
+        public const string AnisotropySlotName = "Anisotropy";
+        public const int AnisotropySlotId = 8;
+
         public const string LightFunctionName = "Advanced";
         public const string SurfaceOutputStructureName = "SurfaceOutputAdvanced";
 
             return "SHADINGMODELID_STANDARD";
         }
 
+        public override bool RequireTangentCalculation()
+        {
+            return true;
+        }
+
         public override int[] GetCustomDataSlots()
         {
             return new int[] { };
             AddSlot(new MaterialSlot(MetallicSlotId, MetallicSlotName, MetallicSlotName, SlotType.Input, SlotValueType.Vector1, Vector4.zero));
             AddSlot(new MaterialSlot(SmoothnessSlotId, SmoothnessSlotName, SmoothnessSlotName, SlotType.Input, SlotValueType.Vector1, Vector4.zero));
             AddSlot(new MaterialSlot(OcclusionSlotId, OcclusionSlotName, OcclusionSlotName, SlotType.Input, SlotValueType.Vector1, Vector4.zero));
-            AddSlot(new MaterialSlot(AnisotropySlotId, AnisotropySlotName, AnisotropySlotName, SlotType.Input, SlotValueType.Vector1, Vector4.zero));
+            AddSlot(new MaterialSlot(AnisotropySlotId, AnisotropySlotName, AnisotropySlotName, SlotType.Input, SlotValueType.Vector1, Vector4.zero));
             AddSlot(new MaterialSlot(AlphaSlotId, AlphaSlotName, AlphaSlotName, SlotType.Input, SlotValueType.Vector1, Vector4.zero));
 
             // clear out slot names that do not match the slots
                                            SmoothnessSlotId,
                                            OcclusionSlotId,
                                            AlphaSlotId,
-                                           AnisotropySlotId,
-                                           TangentSlotId
+                                           TangentSlotId,
+                                           AnisotropySlotId
                                        });
         }
         

MaterialGraphProject/Assets/Matt/ClothMasterNode.cs

         //public const string MetallicSlotName = "Metallic";
         //public const int MetallicSlotId = 2;
 
+        public const string AnisotropySlotName = "Anisotropy";
+        public const int AnisotropySlotId = 8;
-
         public const string ClothFactorSlotName = "ClothFactor";
         public const int ClothFactorSlotId = 10;
 
             return "SHADINGMODELID_CLOTH";
         }
 
+        public override bool RequireTangentCalculation()
+        {
+            return true;
+        }
+
         public override int[] GetCustomDataSlots()
         {
             return new int[] { 9, 10 };
             //AddSlot(new MaterialSlot(MetallicSlotId, MetallicSlotName, MetallicSlotName, SlotType.Input, SlotValueType.Vector1, Vector4.zero));
             AddSlot(new MaterialSlot(SmoothnessSlotId, SmoothnessSlotName, SmoothnessSlotName, SlotType.Input, SlotValueType.Vector1, Vector4.zero));
             AddSlot(new MaterialSlot(OcclusionSlotId, OcclusionSlotName, OcclusionSlotName, SlotType.Input, SlotValueType.Vector1, Vector4.zero));
-            AddSlot(new MaterialSlot(AnisotropySlotId, AnisotropySlotName, AnisotropySlotName, SlotType.Input, SlotValueType.Vector1, Vector4.zero));
             AddSlot(new MaterialSlot(TangentSlotId, TangentSlotName, TangentSlotName, SlotType.Input, SlotValueType.Vector3, Vector4.zero));
             AddSlot(new MaterialSlot(AnisotropySlotId, AnisotropySlotName, AnisotropySlotName, SlotType.Input, SlotValueType.Vector1, Vector4.zero));
             AddSlot(new MaterialSlot(FuzzSlotId, FuzzSlotName, FuzzSlotName, SlotType.Input, SlotValueType.Vector3, Vector4.zero));
                                            SmoothnessSlotId,
                                            OcclusionSlotId,
                                            AlphaSlotId,
-                                           AnisotropySlotId,
+                                           AnisotropySlotId,
                                            FuzzSlotId,
                                            ClothFactorSlotId
                                        });

MaterialGraphProject/Assets/Matt/SubsurfaceMetallicMasterNode.cs

         public const string MetallicSlotName = "Metallic";
         public const int MetallicSlotId = 2;
 
+        public const string AnisotropySlotName = "Anisotropy";
+        public const int AnisotropySlotId = 8;
         public const string TranslucencySlotName = "Translucency";
         public const int TranslucencySlotId = 9;
 
             return "SHADINGMODELID_SUBSURFACE";
         }
 
+        public override bool RequireTangentCalculation()
+        {
+            return true;
+        }
+
         public override int[] GetCustomDataSlots()
         {
             return new int[] { 9 };
             AddSlot(new MaterialSlot(MetallicSlotId, MetallicSlotName, MetallicSlotName, SlotType.Input, SlotValueType.Vector1, Vector4.zero));
             AddSlot(new MaterialSlot(SmoothnessSlotId, SmoothnessSlotName, SmoothnessSlotName, SlotType.Input, SlotValueType.Vector1, Vector4.zero));
             AddSlot(new MaterialSlot(OcclusionSlotId, OcclusionSlotName, OcclusionSlotName, SlotType.Input, SlotValueType.Vector1, Vector4.zero));
-            AddSlot(new MaterialSlot(AnisotropySlotId, AnisotropySlotName, AnisotropySlotName, SlotType.Input, SlotValueType.Vector1, Vector4.zero));
             AddSlot(new MaterialSlot(TangentSlotId, TangentSlotName, TangentSlotName, SlotType.Input, SlotValueType.Vector3, Vector4.zero));
             AddSlot(new MaterialSlot(AnisotropySlotId, AnisotropySlotName, AnisotropySlotName, SlotType.Input, SlotValueType.Vector1, Vector4.zero));
             AddSlot(new MaterialSlot(TranslucencySlotId, TranslucencySlotName, TranslucencySlotName, SlotType.Input, SlotValueType.Vector3, Vector4.zero));
                                            SmoothnessSlotId,
                                            OcclusionSlotId,
                                            AlphaSlotId,
-                                           AnisotropySlotId,
+                                           AnisotropySlotId,
                                            TranslucencySlotId
                                        });
         }

MaterialGraphProject/Assets/Matt/Eye.meta

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+  assetBundleVariant: 

MaterialGraphProject/Assets/Matt/EyeMaster.ShaderGraph.meta

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MaterialGraphProject/Assets/Matt/EyeMasterNode.cs

+using System;
+using UnityEngine.Graphing;
+
+namespace UnityEngine.MaterialGraph
+{
+    [Serializable]
+    [Title("Master/Eye")]
+    public class EyeMasterNode : AbstractAdvancedMasterNode
+    {
+        //public const string MetallicSlotName = "Metallic";
+        //public const int MetallicSlotId = 2;
+
+        public const string LightFunctionName = "Advanced";
+        public const string SurfaceOutputStructureName = "SurfaceOutputAdvanced";
+
+        public const string IrisMaskSlotName = "IrisMask";
+        public const int IrisMaskSlotId = 8;
+
+        public const string IrisDistanceSlotName = "IrisDistance";
+        public const int IrisDistanceSlotId = 9;
+
+        public EyeMasterNode()
+        {
+            name = "EyeMaster";
+            UpdateNodeAfterDeserialization();
+        }
+
+        public override string GetMaterialID()
+        {
+            return "SHADINGMODELID_EYE";
+        }
+
+        public override int[] GetCustomDataSlots()
+        {
+            return new int[] { 8, 9 };
+        }
+
+        public override string[] GetCustomData()
+        {
+            string tangentInput = GetVariableNameForSlotAtId(7);
+            if (tangentInput == "")
+                tangentInput = "float2(1,0)";
+            else
+                tangentInput = tangentInput + ".rg";
+            string irisMaskInput = GetVariableNameForSlotAtId(8);
+            if (irisMaskInput == "")
+                irisMaskInput = "0";
+            else
+                irisMaskInput = irisMaskInput + ".r";
+            string irisDistanceInput = GetVariableNameForSlotAtId(9);
+            if (irisDistanceInput == "")
+                irisDistanceInput = "0";
+            else
+                irisDistanceInput = irisDistanceInput + ".r";
+            return new string[] { "o.CustomData = float4(" + tangentInput + ", " + irisMaskInput + ", " + irisDistanceInput + ");" };
+        }
+
+        public sealed override void UpdateNodeAfterDeserialization()
+        {
+            AddSlot(new MaterialSlot(AlbedoSlotId, AlbedoSlotName, AlbedoSlotName, SlotType.Input, SlotValueType.Vector3, Vector4.zero));
+            AddSlot(new MaterialSlot(NormalSlotId, NormalSlotName, NormalSlotName, SlotType.Input, SlotValueType.Vector3, Vector4.zero));
+            AddSlot(new MaterialSlot(EmissionSlotId, EmissionSlotName, EmissionSlotName, SlotType.Input, SlotValueType.Vector3, Vector4.zero));
+            //AddSlot(new MaterialSlot(MetallicSlotId, MetallicSlotName, MetallicSlotName, SlotType.Input, SlotValueType.Vector1, Vector4.zero));
+            AddSlot(new MaterialSlot(SmoothnessSlotId, SmoothnessSlotName, SmoothnessSlotName, SlotType.Input, SlotValueType.Vector1, Vector4.zero));
+            AddSlot(new MaterialSlot(OcclusionSlotId, OcclusionSlotName, OcclusionSlotName, SlotType.Input, SlotValueType.Vector1, Vector4.zero));
+            AddSlot(new MaterialSlot(TangentSlotId, TangentSlotName, TangentSlotName, SlotType.Input, SlotValueType.Vector2, Vector4.zero));
+            AddSlot(new MaterialSlot(IrisMaskSlotId, IrisMaskSlotName, IrisMaskSlotName, SlotType.Input, SlotValueType.Vector1, Vector4.zero));
+            AddSlot(new MaterialSlot(IrisDistanceSlotId, IrisDistanceSlotName, IrisDistanceSlotName, SlotType.Input, SlotValueType.Vector1, Vector4.zero));
+            AddSlot(new MaterialSlot(AlphaSlotId, AlphaSlotName, AlphaSlotName, SlotType.Input, SlotValueType.Vector1, Vector4.zero));
+
+            // clear out slot names that do not match the slots
+            // we support
+            RemoveSlotsNameNotMatching(
+                                       new[]
+                                       {
+                                           AlbedoSlotId,
+                                           NormalSlotId,
+                                           EmissionSlotId,
+                                           //MetallicSlotId,
+                                           SmoothnessSlotId,
+                                           OcclusionSlotId,
+                                           AlphaSlotId,
+                                           TangentSlotId,
+                                           IrisMaskSlotId,
+                                           IrisDistanceSlotId
+                                       });
+        }
+        
+        public override string GetSurfaceOutputName()
+        {
+            return SurfaceOutputStructureName;
+        }
+
+        public override string GetLightFunction()
+        {
+            return LightFunctionName;
+        }
+    }
+}

MaterialGraphProject/Assets/Matt/EyeMasterNode.cs.meta

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MaterialGraphProject/Assets/Matt/TangentToWorldNode.cs

+using UnityEngine.Graphing;
+
+namespace UnityEngine.MaterialGraph
+{
+    [Title("Math/Vector/TangentToWorld")]
+    public class TangentToWorldNode : Function1Input, IGeneratesFunction, IMayRequireNormal, IMayRequireTangent, IMayRequireBitangent
+    {
+        public TangentToWorldNode()
+        {
+            name = "TangentToWorld";
+        }
+
+        protected override string GetFunctionName()
+        {
+            return "unity_tangenttoworld_" + precision;
+        }
+
+        protected override MaterialSlot GetInputSlot()
+        {
+            return new MaterialSlot(InputSlotId, GetInputSlotName(), kInputSlotShaderName, SlotType.Input, SlotValueType.Vector3, Vector4.zero);
+        }
+
+        protected override MaterialSlot GetOutputSlot()
+        {
+            return new MaterialSlot(OutputSlotId, GetOutputSlotName(), kOutputSlotShaderName, SlotType.Output, SlotValueType.Vector3, Vector4.zero);
+        }
+
+        protected override string GetFunctionPrototype(string argName)
+        {
+            return "inline " + precision + outputDimension + " " + GetFunctionName() + " ("
+                   + precision + inputDimension + " " + argName + ", float3 tangent, float3 bitangent, float3 normal )";
+        }
+
+        public void GenerateNodeFunction(ShaderGenerator visitor, GenerationMode generationMode)
+        {
+            var outputString = new ShaderGenerator();
+            outputString.AddShaderChunk(GetFunctionPrototype("arg1"), false);
+            outputString.AddShaderChunk("{", false);
+            outputString.Indent();
+            //outputString.AddShaderChunk("float3x3 tangentToWorld = transpose(float3x3(" + ShaderGeneratorNames.WorldSpaceTangent + ", " + ShaderGeneratorNames.WorldSpaceBitangent + ", " + ShaderGeneratorNames.WorldSpaceNormal + "));", false);
+            outputString.AddShaderChunk("float3x3 tangentToWorld = transpose(float3x3(tangent, bitangent, normal));", false);
+            outputString.AddShaderChunk("return saturate(mul(tangentToWorld, normalize(arg1)));", false);
+            outputString.Deindent();
+            outputString.AddShaderChunk("}", false);
+
+            visitor.AddShaderChunk(outputString.GetShaderString(0), true);
+        }
+
+        protected override string GetFunctionCallBody(string inputValue)
+        {
+            return GetFunctionName() + " (" + inputValue + ", "+ShaderGeneratorNames.WorldSpaceTangent + ", " + ShaderGeneratorNames.WorldSpaceBitangent + ", " + ShaderGeneratorNames.WorldSpaceNormal +")";
+        }
+
+        public bool RequiresNormal()
+        {
+            return true;
+        }
+
+        public bool RequiresTangent()
+        {
+            return true;
+        }
+
+        public bool RequiresBitangent()
+        {
+            return true;
+        }
+    }
+}

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