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95 行
3.6 KiB
95 行
3.6 KiB
using System;
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using System.Linq;
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using UnityEngine;
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namespace UnityEditor.Graphs.Material
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{
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[Title("Fractal/Kaleidoscope Node")]
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class KaleidoscopeNode : BaseMaterialNode, IGeneratesFunction, IGeneratesBodyCode
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{
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[SerializeField]
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private int m_Iterations = 6;
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private const string kPointInputName = "Point";
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private const string kConstant1InputName = "Constant1";
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private const string kConstant2InputName = "Constant2";
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private const string kOutputSlotName = "Output";
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public override bool hasPreview { get { return true; } }
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public override void Init()
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{
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name = "KaleidoscopeNode";
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base.Init();
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AddSlot(new Slot(SlotType.InputSlot, kPointInputName));
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AddSlot(new Slot(SlotType.InputSlot, kConstant1InputName));
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AddSlot(new Slot(SlotType.InputSlot, kConstant2InputName));
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AddSlot(new Slot(SlotType.OutputSlot, kOutputSlotName));
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}
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public void GenerateNodeFunction(ShaderGenerator visitor, GenerationMode generationMode)
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{
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var outputString = new ShaderGenerator();
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foreach (var precision in m_PrecisionNames)
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{
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outputString.AddShaderChunk("inline " + precision + "4 unity_kaleidoscope_" + precision + " (" + precision + "2 p, " + precision + "4 c1, " + precision + "4 c2, int iterations)", false);
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outputString.AddShaderChunk("{", false);
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outputString.Indent();
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outputString.AddShaderChunk("c1 = c1 * 2 - 1;", false);
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outputString.AddShaderChunk("c2 = c2 * 2 - 1;", false);
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outputString.AddShaderChunk("for (int n = 0; n < iterations; n++)", false);
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outputString.AddShaderChunk("{", false);
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outputString.Indent();
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outputString.AddShaderChunk("p = c1.xy + p * c1.zw + " + precision + "2(dot(p, c2.xy), dot(p, c2.zw));", false);
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outputString.AddShaderChunk("if(p.x < p.y) p.xy = -p.yx;", false);
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outputString.Deindent();
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outputString.AddShaderChunk("}", false);
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outputString.AddShaderChunk("return " + precision + "4(p, 1, 1);", false);
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outputString.Deindent();
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outputString.AddShaderChunk("}", false);
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}
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visitor.AddShaderChunk(outputString.GetShaderString(0), true);
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}
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public void GenerateNodeCode(ShaderGenerator visitor, GenerationMode generationMode)
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{
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var outputSlot = FindOutputSlot (kOutputSlotName);
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var pointInput = FindInputSlot (kPointInputName);
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var constant1Input = FindInputSlot (kConstant1InputName);
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var constant2Input = FindInputSlot (kConstant2InputName);
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if (outputSlot == null || pointInput == null || constant1Input == null || constant2Input == null)
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{
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Debug.LogError("Invalid slot configuration on node: " + name);
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return;
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}
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string pointInputValue = GetSlotValue (pointInput, generationMode);
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string constant1InputValue = GetSlotValue (constant1Input, generationMode);
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string constant2InputValue = GetSlotValue (constant2Input, generationMode);
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string outName = GetOutputVariableNameForSlot (outputSlot, generationMode);
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visitor.AddShaderChunk (precision + "4 " + outName + " = unity_kaleidoscope_" + precision + "(" + pointInputValue + ".xy, " + constant1InputValue + ", " + constant2InputValue + ", " + m_Iterations + ");", false);
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}
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static float Slider(string title, float value, float from, float to)
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{
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GUILayout.BeginHorizontal();
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GUILayout.Label(title);
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value = GUILayout.HorizontalSlider(value, from, to, GUILayout.Width(64));
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GUILayout.EndHorizontal();
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return value;
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}
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public override void NodeUI(Graphs.GraphGUI host)
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{
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base.NodeUI(host);
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EditorGUI.BeginChangeCheck();
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m_Iterations = (int)Slider("Iterations", (float)m_Iterations, 1, 50);
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if (EditorGUI.EndChangeCheck())
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RegeneratePreviewShaders();
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}
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}
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}
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