Random range

MaterialGraphProject/Assets/_MingWai/RandomRangeNode.cs

+namespace UnityEngine.MaterialGraph
+{
+    [Title("Math/Range/RandomRange")]
+    public class RandomRangeNode : Function3Input, IGeneratesFunction
+    {
+        public RandomRangeNode()
+        {
+            name = "RandomRange";
+        }
+
+        protected override string GetFunctionName()
+        {
+            return "unity_randomrange_" + precision;
+        }
+
+        protected override string GetInputSlot1Name()
+        {
+            return "Seed";
+        }
+
+        protected override MaterialSlot GetInputSlot1()
+        {
+            return new MaterialSlot(InputSlot1Id, GetInputSlot1Name(), kInputSlot1ShaderName, UnityEngine.Graphing.SlotType.Input, SlotValueType.Vector2, Vector2.zero);
+        }
+
+        protected override string GetInputSlot2Name()
+        {
+            return "Min";
+        }
+
+        protected override MaterialSlot GetInputSlot2()
+        {
+            return new MaterialSlot(InputSlot2Id, GetInputSlot2Name(), kInputSlot2ShaderName, UnityEngine.Graphing.SlotType.Input, SlotValueType.Vector1, Vector2.zero);
+        }
+
+        protected override string GetInputSlot3Name()
+        {
+            return "Max";
+        }
+
+        protected override MaterialSlot GetInputSlot3()
+        {
+            return new MaterialSlot(InputSlot3Id, GetInputSlot3Name(), kInputSlot3ShaderName, UnityEngine.Graphing.SlotType.Input, SlotValueType.Vector1, Vector3.zero);
+        }
+
+        protected override MaterialSlot GetOutputSlot()
+        {
+            return new MaterialSlot(OutputSlotId, GetOutputSlotName(), kOutputSlotShaderName, UnityEngine.Graphing.SlotType.Output, SlotValueType.Vector1, Vector2.zero);
+        }
+
+        public void GenerateNodeFunction(ShaderGenerator visitor, GenerationMode generationMode)
+        {
+            var outputString = new ShaderGenerator();
+            outputString.AddShaderChunk(GetFunctionPrototype("seed", "min", "max"), false);
+            outputString.AddShaderChunk("{", false);
+            outputString.Indent();
+
+            outputString.AddShaderChunk("float randomno =  frac(sin(dot(seed, float2(12.9898, 78.233)))*43758.5453);", false);
+            outputString.AddShaderChunk("return floor(randomno * (max - min + 1)) + min;", false);
+            
+            outputString.Deindent();
+            outputString.AddShaderChunk("}", false);
+
+            visitor.AddShaderChunk(outputString.GetShaderString(0), true);
+        }
+    }
+}

MaterialGraphProject/Assets/_MingWai/RandomRangeNode.cs.meta

+fileFormatVersion: 2
+guid: 5e7048f6323341547955eab30f96151f
+timeCreated: 1495703851
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
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