Added RGBtoLinear and LinearToRGB

MaterialGraphProject/Assets/Matt/LinearToRGB.cs

+using UnityEngine.Graphing;
+
+namespace UnityEngine.MaterialGraph
+{
+	[Title ("Math/Color/LineartoRGB")]
+	public class LineartoRGBNode : Function1Input, IGeneratesFunction
+	{
+		public LineartoRGBNode()
+		{
+			name = "RGBtoLinear";
+		}
+
+		protected override string GetFunctionName ()
+		{
+			return "unity_lineartorgb_" + 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);
+		}
+
+		public void GenerateNodeFunction (ShaderGenerator visitor, GenerationMode generationMode)
+		{
+			var outputString = new ShaderGenerator ();
+			outputString.AddShaderChunk (GetFunctionPrototype ("arg1"), false);
+			outputString.AddShaderChunk ("{", false);
+			outputString.Indent ();
+            outputString.AddShaderChunk (precision + "3 sRGBLo = arg1 * 12.92;", false);
+            outputString.AddShaderChunk (precision + "3 sRGBHi = (pow(max(abs(arg1), 1.192092896e-07), "+precision+ "3(1.0 / 2.4, 1.0 / 2.4, 1.0 / 2.4)) * 1.055) - 0.055;", false);
+            outputString.AddShaderChunk ("return " + precision + "3(arg1 <= 0.0031308) ? sRGBLo : sRGBHi;", false);
+			outputString.Deindent ();
+			outputString.AddShaderChunk ("}", false);
+
+            visitor.AddShaderChunk (outputString.GetShaderString (0), true);
+		}
+	}
+}

MaterialGraphProject/Assets/Matt/LinearToRGB.cs.meta

+fileFormatVersion: 2
+guid: 667e5671fc459344c889207ff866ab08
+timeCreated: 1444218016
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

MaterialGraphProject/Assets/Matt/RGBtoLinear.cs

+using UnityEngine.Graphing;
+
+namespace UnityEngine.MaterialGraph
+{
+	[Title ("Math/Color/RGBtoLinear")]
+	public class RGBtoLinearNode : Function1Input, IGeneratesFunction
+	{
+		public RGBtoLinearNode()
+		{
+			name = "RGBtoLinear";
+		}
+
+		protected override string GetFunctionName ()
+		{
+			return "unity_rgbtolinear_" + 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);
+		}
+
+		public void GenerateNodeFunction (ShaderGenerator visitor, GenerationMode generationMode)
+		{
+			var outputString = new ShaderGenerator ();
+			outputString.AddShaderChunk (GetFunctionPrototype ("arg1"), false);
+			outputString.AddShaderChunk ("{", false);
+			outputString.Indent ();
+            outputString.AddShaderChunk (precision + "3 linearRGBLo = arg1 / 12.92;", false);
+            outputString.AddShaderChunk (precision + "3 linearRGBHi = pow(max(abs((arg1 + 0.055) / 1.055), 1.192092896e-07), "+precision+"3(2.4, 2.4, 2.4));", false);
+            outputString.AddShaderChunk ("return " + precision + "3(arg1 <= 0.04045) ? linearRGBLo : linearRGBHi;", false);
+			outputString.Deindent ();
+			outputString.AddShaderChunk ("}", false);
+
+            visitor.AddShaderChunk (outputString.GetShaderString (0), true);
+		}
+	}
+}

MaterialGraphProject/Assets/Matt/RGBtoLinear.cs.meta

+fileFormatVersion: 2
+guid: e282583a8fbbf2742bd10d617611c8b0
+timeCreated: 1444218016
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: