Procedural Line Segments

MaterialGraphProject/Assets/Brandon/LineNode.cs

+namespace UnityEngine.MaterialGraph
+{
+    [Title("Procedural/Line Node")]
+    public class LineNode : Function3Input, IGeneratesFunction
+    {
+        public LineNode()
+        {
+            name = "LineNode";
+        }
+
+        protected override string GetFunctionName()
+        {
+            return "unity_linenode_" + precision;
+        }
+
+        protected override string GetInputSlot1Name()
+        {
+            return "UV";
+        }
+
+        protected override string GetInputSlot2Name()
+        {
+            return "StartPoint";
+        }
+
+        protected override string GetInputSlot3Name()
+        {
+            return "EndPoint";
+        }
+
+        protected override MaterialSlot GetInputSlot1()
+        {
+            return new MaterialSlot(InputSlot1Id, GetInputSlot1Name(), kInputSlot1ShaderName, UnityEngine.Graphing.SlotType.Input, SlotValueType.Vector2, Vector2.zero);
+        }
+
+        protected override MaterialSlot GetInputSlot2()
+        {
+            return new MaterialSlot(InputSlot2Id, GetInputSlot2Name(), kInputSlot2ShaderName, UnityEngine.Graphing.SlotType.Input, SlotValueType.Vector2, Vector2.zero);
+        }
+
+        protected override MaterialSlot GetInputSlot3()
+        {
+            return new MaterialSlot(InputSlot3Id, GetInputSlot3Name(), kInputSlot3ShaderName, UnityEngine.Graphing.SlotType.Input, SlotValueType.Vector2, Vector2.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("uv", "a", "b"), false);
+            outputString.AddShaderChunk("{", false);
+            outputString.Indent();
+
+
+            //float line(vec2 a, vec2 b, vec2 p)
+            //{
+            //    vec2 aTob = b - a;
+            //    vec2 aTop = p - a;
+
+            //    float t = dot(aTop, aTob) / dot(aTob, aTob);
+
+            //    t = clamp(t, 0.0, 1.0);
+
+            //    float d = length(p - (a + aTob * t));
+            //    d = 1.0 / d;
+
+            //    return clamp(d, 0.0, 1.0);
+            //}
+
+            outputString.AddShaderChunk("float2 aTob = b - a;", false);
+            outputString.AddShaderChunk("float2 aTop = uv - a;", false);
+            outputString.AddShaderChunk("float t = dot(aTop, aTob) / dot(aTob, aTob);", false);
+            outputString.AddShaderChunk("t = clamp(t, 0.0, 1.0);", false);
+            outputString.AddShaderChunk("float d = 1.0 / length(uv - (a + aTob * t));", false);
+            outputString.AddShaderChunk("return clamp(d, 0.0, 1.0);", false);
+
+            outputString.Deindent();
+            outputString.AddShaderChunk("}", false);
+
+            visitor.AddShaderChunk(outputString.GetShaderString(0), true);
+        }
+    }
+}

MaterialGraphProject/Assets/Brandon/LineNode.cs.meta

+fileFormatVersion: 2
+guid: 10fe1b4258a2ed646925d0ec6bdc35f2
+timeCreated: 1495489255
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
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+  assetBundleVariant: