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45 行
1.6 KiB
45 行
1.6 KiB
using UnityEngine.Graphing;
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namespace UnityEngine.MaterialGraph
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{
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[Title ("Math/Color/HSVtoRGB")]
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public class HSVtoRGBNode : Function1Input, IGeneratesFunction
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{
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public HSVtoRGBNode ()
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{
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name = "HSVtoRGB";
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}
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protected override string GetFunctionName ()
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{
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return "unity_hsvtorgb_" + precision;
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}
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protected override MaterialSlot GetInputSlot ()
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{
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return new MaterialSlot (InputSlotId, GetInputSlotName (), kInputSlotShaderName, SlotType.Input, SlotValueType.Vector3, Vector4.zero);
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}
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protected override MaterialSlot GetOutputSlot ()
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{
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return new MaterialSlot (OutputSlotId, GetOutputSlotName (), kOutputSlotShaderName, SlotType.Output, SlotValueType.Vector3, Vector4.zero);
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}
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//TODO:Externalize
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//Reference code from:https://github.com/Unity-Technologies/PostProcessing/blob/master/PostProcessing/Resources/Shaders/ColorGrading.cginc#L175
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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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outputString.AddShaderChunk (GetFunctionPrototype ("arg1"), false);
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outputString.AddShaderChunk ("{", false);
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outputString.Indent ();
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outputString.AddShaderChunk (precision + "4 K = " + precision + "4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);", false);
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outputString.AddShaderChunk (precision + "3 P = abs(frac(arg1.xxx + K.xyz) * 6.0 - K.www);", false);
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outputString.AddShaderChunk ("return arg1.z * lerp(K.xxx, saturate(P - K.xxx), arg1.y);", false);
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outputString.Deindent ();
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outputString.AddShaderChunk ("}", false);
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visitor.AddShaderChunk (outputString.GetShaderString (0), true);
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}
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}
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}
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