Added matrix multiply, transpose, vector projection and rejection

MaterialGraphProject/Assets/UnityShaderEditor/Runtime/Nodes/MatrixMultiplyNode.cs

+namespace UnityEngine.MaterialGraph
+{
+    [Title("Matrix/Multiply Node")]
+    public class MatrixMultiplyNode : Function2Input, IGeneratesFunction
+    {
+        public MatrixMultiplyNode()
+        {
+            name = "MatrixMultiplyNode";
+        }
+
+        protected override string GetFunctionName()
+        {
+            return "unity_matrix_multiply_" + precision;
+        }
+
+        public void GenerateNodeFunction(ShaderGenerator visitor, GenerationMode generationMode)
+        {
+            var outputString = new ShaderGenerator();
+            outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
+            outputString.AddShaderChunk("{", false);
+            outputString.Indent();
+            outputString.AddShaderChunk("return mul(arg1, arg2);", false);
+            outputString.Deindent();
+            outputString.AddShaderChunk("}", false);
+
+            visitor.AddShaderChunk(outputString.GetShaderString(0), true);
+        }
+    }
+}

MaterialGraphProject/Assets/UnityShaderEditor/Runtime/Nodes/MatrixMultiplyNode.cs.meta

+fileFormatVersion: 2
+guid: 8eb82c17970f84fc2b84d060df718533
+timeCreated: 1495542985
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

MaterialGraphProject/Assets/UnityShaderEditor/Runtime/Nodes/MatrixTransposeNode.cs

+namespace UnityEngine.MaterialGraph
+{
+    [Title("Matrix/Transpose Node")]
+    public class MatrixTransposeNode : Function1Input, IGeneratesFunction
+    {
+        public MatrixTransposeNode()
+        {
+            name = "MatrixTranspose";
+        }
+
+        protected override string GetFunctionName()
+        {
+            return "unity_matrix_transpose_" + precision;
+        }
+
+        public void GenerateNodeFunction(ShaderGenerator visitor, GenerationMode generationMode)
+        {
+            var outputString = new ShaderGenerator();
+            outputString.AddShaderChunk(GetFunctionPrototype("arg1"), false);
+            outputString.AddShaderChunk("{", false);
+            outputString.Indent();
+            outputString.AddShaderChunk("return transpose(arg1);", false);
+            outputString.Deindent();
+            outputString.AddShaderChunk("}", false);
+
+            visitor.AddShaderChunk(outputString.GetShaderString(0), true);
+        }
+    }
+}

MaterialGraphProject/Assets/UnityShaderEditor/Runtime/Nodes/MatrixTransposeNode.cs.meta

+fileFormatVersion: 2
+guid: 19da2635a60154a6793334e535a0a856
+timeCreated: 1495542985
+licenseType: Pro
+MonoImporter:
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+  executionOrder: 0
+  icon: {instanceID: 0}
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MaterialGraphProject/Assets/UnityShaderEditor/Runtime/Nodes/VectorProjectionNode.cs

+namespace UnityEngine.MaterialGraph
+{
+    [Title("Vector/Projection Node")]
+    public class VectorProjectionNode : Function2Input, IGeneratesFunction
+    {
+        public VectorProjectionNode()
+        {
+            name = "VectorProjection";
+        }
+
+        protected override string GetFunctionName()
+        {
+            return "unity_vector_projection_" + precision;
+        }
+
+        public void GenerateNodeFunction(ShaderGenerator visitor, GenerationMode generationMode)
+        {
+            var outputString = new ShaderGenerator();
+            outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
+            outputString.AddShaderChunk("{", false);
+            outputString.Indent();
+            outputString.AddShaderChunk("return arg2 * dot(arg1, arg2) / dot(arg2, arg2);", false);
+            outputString.Deindent();
+            outputString.AddShaderChunk("}", false);
+
+            visitor.AddShaderChunk(outputString.GetShaderString(0), true);
+        }
+    }
+}

MaterialGraphProject/Assets/UnityShaderEditor/Runtime/Nodes/VectorProjectionNode.cs.meta

+fileFormatVersion: 2
+guid: 7cf458b51c72d4045a820965b8037b9b
+timeCreated: 1495542985
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

MaterialGraphProject/Assets/UnityShaderEditor/Runtime/Nodes/VectorRejectionNode.cs

+namespace UnityEngine.MaterialGraph
+{
+    [Title("Vector/Rejection Node")]
+    public class VectorRejectionNode : Function2Input, IGeneratesFunction
+    {
+        public VectorRejectionNode()
+        {
+            name = "VectorRejection";
+        }
+
+        protected override string GetFunctionName()
+        {
+            return "unity_vector_rejection_" + precision;
+        }
+
+        public void GenerateNodeFunction(ShaderGenerator visitor, GenerationMode generationMode)
+        {
+            var outputString = new ShaderGenerator();
+            outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
+            outputString.AddShaderChunk("{", false);
+            outputString.Indent();
+            outputString.AddShaderChunk("return arg1 - (arg2 * dot(arg1, arg2) / dot(arg2, arg2));", false);
+            outputString.Deindent();
+            outputString.AddShaderChunk("}", false);
+
+            visitor.AddShaderChunk(outputString.GetShaderString(0), true);
+        }
+    }
+}

MaterialGraphProject/Assets/UnityShaderEditor/Runtime/Nodes/VectorRejectionNode.cs.meta

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+timeCreated: 1495542985
+licenseType: Pro
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+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
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